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Bombardi L, Orlando M, Aulitto M, Fusco S. Thermophilic Hemicellulases Secreted by Microbial Consortia Selected from an Anaerobic Digester. Int J Mol Sci 2024; 25:9887. [PMID: 39337375 PMCID: PMC11432564 DOI: 10.3390/ijms25189887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2024] [Revised: 08/30/2024] [Accepted: 09/09/2024] [Indexed: 09/30/2024] Open
Abstract
The rise of agro-industrial activities over recent decades has exponentially increased lignocellulose biomasses (LCB) production. LCB serves as a cost-effective source for fermentable sugars and other renewable chemicals. This study explores the use of microbial consortia, particularly thermophilic consortia, for LCB deconstruction. Thermophiles produce stable enzymes that retain activity under industrial conditions, presenting a promising approach for LCB conversion. This research focused on two microbial consortia (i.e., microbiomes) that were analyzed for enzyme production using a cheap medium, i.e., a mixture of spent mushroom substrate (SMS) and digestate. The secreted xylanolytic enzymes were characterized in terms of temperature and pH optima, thermal stability, and hydrolysis products from LCB-derived polysaccharides. These enzymes showed optimal activity aligning with common biorefinery conditions and outperformed a formulated enzyme mixture in thermostability tests in the digestate. Phylogenetic and genomic analyses highlighted the genetic diversity and metabolic potential of these microbiomes. Bacillus licheniformis was identified as a key species, with two distinct strains contributing to enzyme production. The presence of specific glycoside hydrolases involved in the cellulose and hemicellulose degradation underscores these consortia's capacity for efficient LCB conversion. These findings highlight the potential of thermophilic microbiomes, isolated from an industrial environment, as a robust source of robust enzymes, paving the way for more sustainable and cost-effective bioconversion processes in biofuel and biochemical production and other biotechnological applications.
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Affiliation(s)
- Luca Bombardi
- Biochemistry and Industrial Biotechnology (BIB) Laboratory, Department of Biotechnology, University of Verona, 37134 Verona, Italy
| | - Marco Orlando
- Department of Biotechnology and Biosciences, University of Milano Bicocca, 20126 Milano, Italy
| | - Martina Aulitto
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy
| | - Salvatore Fusco
- Biochemistry and Industrial Biotechnology (BIB) Laboratory, Department of Biotechnology, University of Verona, 37134 Verona, Italy
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2
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Greene JM, Wallace J, Williams RB, Leytem AB, Bock BR, McCully M, Kaffka SR, Rotz CA, Quinn JC. National Greenhouse Gas Emission Reduction Potential from Adopting Anaerobic Digestion on Large-Scale Dairy Farms in the United States. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:12409-12419. [PMID: 38953529 DOI: 10.1021/acs.est.4c00367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2024]
Abstract
Waste-to-energy systems can provide a functional demonstration of the economic and environmental benefits of circularity, innovation, and reimagining existing systems. This study offers a robust quantification of the greenhouse gas (GHG) emission reduction potential of the adoption of anaerobic digestion (AD) technology on applicable large-scale dairy farms in the contiguous United States. GHG reduction estimates were developed through a robust life cycle modeling framework paired with sensitivity and uncertainty analyses. Twenty dairy configurations were modeled to capture important differences in housing and manure management practices, applicable AD technologies, regional climates, storage cleanout schedules, and methods of land application. Monte Carlo results for the 90% confidence interval illustrate the potential for AD adoption to reduce GHG emissions from the large-scale dairy industry by 2.45-3.52 MMT of CO2-eq per year considering biogas use only in renewable natural gas programs and as much as 4.53-6.46 MMT of CO2-eq per year with combined heat and power as an additional biogas use case. At the farm level, AD technology may reduce GHG emissions from manure management systems by 58.1-79.8% depending on the region. Discussion focuses on regional differences in GHG emissions from manure management strategies and the challenges and opportunities surrounding AD adoption.
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Affiliation(s)
- Jonah M Greene
- Sustainability Science, 30940 Hummingbird Lane, Steamboat Springs, Colorado 80487, United States
| | - Jim Wallace
- Sustain RNG, LLC, 1447 Tryon Street, Suite 301, Charlotte, North Carolina 28203, United States
| | - Robert B Williams
- California Biomass Collaborative, University of California, Davis, One Shields Ave, Davis, California 95616, United States
| | - April B Leytem
- Northwest Irrigation and Soils Research Lab, USDA Agricultural Research Service, 3793 N 3600E, Kimberly, Idaho 83341, United States
| | - Bert R Bock
- BR Bock Consulting, Inc., 102 Telfair Place, Athens, Georgia 30606, United States
| | - Mike McCully
- McCully Consulting, LLC, P.O. Box 852, South Bend, Indiana 46624, United States
| | - Stephen R Kaffka
- Department of Plant Sciences, University of California, 283 Hunt Hall, Davis, California 95618, United States
| | - C Alan Rotz
- Pasture Systems and Watershed Management Research Unit, USDA Agricultural Research Service, Curtin Road, University Park, Pennsylvania 16802, United States
| | - Jason C Quinn
- Sustainability Science, 30940 Hummingbird Lane, Steamboat Springs, Colorado 80487, United States
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3
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Lo KV, Liao PH, Islam F, Cherian TT. Anaerobic digestion of liquid dairy manure pretreated by the microwave-enhanced advanced oxidation process. ENVIRONMENTAL TECHNOLOGY 2024; 45:2218-2227. [PMID: 36628621 DOI: 10.1080/09593330.2023.2167611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 01/05/2023] [Indexed: 06/17/2023]
Abstract
The microwave-enhanced advanced oxidation process (MW-AOP) was utilized for the treatment of liquid dairy manure, prior to anaerobic digestion (AD). A significant amount of soluble chemical oxygen demand (SCOD) was formed in the treated solution, but there was no or little increase in volatile fatty acid (VFA). In this study, up-flow anaerobic sludge blanket (UASB) reactors were used in both the conventional AD system and as the methane phase reactor in a two-phase anaerobic digestion (TPAD) system. Both AD systems were capable of operating at very short hydraulic retention times (HRTs) to as low as about 3 days, and very high methane production rates were achieved. However, much higher methane production was obtained in the TPAD system. The phase separation of the acidogenesis and the methanogenesis in the TPAD system not only increased methane production but also maintained reactor stability throughout the experimental period. Thus, the combination of MW-AOP treatment and TPAD appears to be an effective means of energy recovery from dairy manure.
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Affiliation(s)
- Kwang Victor Lo
- Department of Civil Engineering, University of British Columbia, Vancouver, B.C. Canada
| | - Ping Huang Liao
- Department of Civil Engineering, University of British Columbia, Vancouver, B.C. Canada
| | - Fahmida Islam
- Department of Civil Engineering, University of British Columbia, Vancouver, B.C. Canada
| | - Tinu Thomas Cherian
- Department of Civil Engineering, University of British Columbia, Vancouver, B.C. Canada
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4
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Sahoo A, Dwivedi A, Madheshiya P, Kumar U, Sharma RK, Tiwari S. Insights into the management of food waste in developing countries: with special reference to India. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:17887-17913. [PMID: 37271790 PMCID: PMC10239724 DOI: 10.1007/s11356-023-27901-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 05/21/2023] [Indexed: 06/06/2023]
Abstract
Up to one third of the food that is purposely grown for human sustenance is wasted and never consumed, with adverse consequences for the environment and socio-economic aspects. In India, managing food waste is a significant environmental concern. Food waste output is increasing in Indian cities and towns as a result of the country's urban expansion, modernization, and population growth. Poor management of food waste can have negative consequences for the environment and pose a risk to the public's health issues. This review focuses on the current challenges, management strategies, and future perspectives of food waste management in India. The efficient management of food waste involves a comprehensive study regarding the characterization of food waste and improved waste management methods. In addition, the government policies and rules for managing food waste that is in effect in India are covered in this review.
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Affiliation(s)
- Ansuman Sahoo
- Laboratory of Ecotoxicology, Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Akanksha Dwivedi
- Laboratory of Ecotoxicology, Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Parvati Madheshiya
- Laboratory of Ecotoxicology, Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Umesh Kumar
- Laboratory of Ecotoxicology, Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Rajesh Kumar Sharma
- Laboratory of Ecotoxicology, Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Supriya Tiwari
- Laboratory of Ecotoxicology, Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
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5
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Prem EM, Markt R, Wunderer M, Wagner AO. Meso- and thermophilic posttreatment of press water coming from a thermophilic municipal solid waste digester. Biotechnol Bioeng 2024; 121:266-280. [PMID: 37902646 PMCID: PMC10953027 DOI: 10.1002/bit.28577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 10/02/2023] [Accepted: 10/10/2023] [Indexed: 10/31/2023]
Abstract
An efficient biogas production out of organic (waste) materials is important to contribute to a carbon-neutral future. In this study, thermophilic press water (PW) coming from an organic fraction of the municipal solid waste digester was further digested in a thermo- and mesophilic posttreatment approach using two semicontinuous 14 L digesters. The results showed that the PW can still have considerable high biogas potential-at least during the touristic high season in central Europe. The change in temperature led to an increase in volatile fatty acid concentrations and a decrease in biogas production in the mesophilic approach in the first days. However, the losses in biogas production at the beginning could be compensated thus there were no considerable differences in biogas production between thermo- and mesophilic posttreatment at the end of incubation. This can most probably be contributed to a change in the microbial community, and potentially problematic intermediates like valerate could be better degraded in the mesophilic reactor. Especially the abundance of representatives of the phylum Bacteroidota, like Fermentimonas spp., increased during mesophilic anaerobic digestion.
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Affiliation(s)
- Eva Maria Prem
- Department of MicrobiologyUniversität InnsbruckInnsbruckAustria
| | - Rudolf Markt
- Department of MicrobiologyUniversität InnsbruckInnsbruckAustria
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Kenneth MJ, Koner S, Hsu GJ, Chen JS, Hsu BM. A review on the effects of discharging conventionally treated livestock waste to the environmental resistome. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 338:122643. [PMID: 37775024 DOI: 10.1016/j.envpol.2023.122643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 09/25/2023] [Accepted: 09/26/2023] [Indexed: 10/01/2023]
Abstract
Globally, animal production has developed rapidly as a consequence of the ongoing population growth, to support food security. This has consequently led to an extensive use of antibiotics to promote growth and prevent diseases in animals. However, most antibiotics are not fully metabolized by these animals, leading to their excretion within urine and faeces, thus making these wastes a major reservoir of antibiotics residues, antibiotic resistance genes (ARGs) and antibiotic resistant bacteria (ARB) in the environment. Farmers normally depend on conventional treatment methods to mitigate the environmental impact of animal waste; however, these methods are not fully efficient to remove the environmental resistome. The present study reviewed the variability of residual antibiotics, ARB, as well as ARGs in the conventionally treated waste and assessed how discharging it could increase resistome in the receiving environments. Wherein, considering the efficiency and environmental safety, an addition of pre-treatments steps with these conventional treatment methods could enhance the removal of antibiotic resistance agents from livestock waste.
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Affiliation(s)
- Mutebi John Kenneth
- Department of Earth and Environmental Sciences, National Chung Cheng University, Chiayi County, Taiwan; Doctoral Program in Science, Technology, Environment and Mathematics, National Chung Cheng University, Chiayi County, Taiwan
| | - Suprokash Koner
- Department of Earth and Environmental Sciences, National Chung Cheng University, Chiayi County, Taiwan; Department of Biomedical Sciences, National Chung Cheng University, Chiayi County, Taiwan
| | - Gwo-Jong Hsu
- Division of Infectious Diseases, Ditmanson Medical Foundation, Chia-Yi Christian Hospital, Chiayi City, Taiwan
| | - Jung-Sheng Chen
- Department of Medical Research, E-Da Hospital, I-Shou University, Kaohsiung, Taiwan
| | - Bing-Mu Hsu
- Department of Earth and Environmental Sciences, National Chung Cheng University, Chiayi County, Taiwan.
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7
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Pourcher AM, Druilhe C, Le Maréchal C, Repérant E, Boscher E, Ziebal C, Martin L, Lebreton M, Rouxel S, Houdayer C, Le Roux S, Derongs L, Poëzévara T, Sarrazin M, Nagard B, Heurtevent L, Denis M. Quantification of indicator and pathogenic bacteria in manures and digestates from three agricultural biogas plants over a one-year period. WASTE MANAGEMENT (NEW YORK, N.Y.) 2023; 169:91-100. [PMID: 37418788 DOI: 10.1016/j.wasman.2023.06.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 06/12/2023] [Accepted: 06/30/2023] [Indexed: 07/09/2023]
Abstract
Interest in the conversion of manure in biogas via anaerobic digestion (AD) is growing, but questions remain about the biosafety of digestates. For a period of one year, we monitored the impact of three mesophilic agricultural biogas plants (BPs) mainly fed with pig manure (BP1, BP3) or bovine manure (BP2) on the physicochemical parameters, the composition of the microbial community and the concentration of bacteria (E. coli, enterococci, Salmonella, Campylobacter, Listeria monocytogenes, Clostridium perfringens, Clostridium botulinum and Clostridioides difficile). The BP2 digestate differed from those of the two other BPs with a higher nitrogen content, more total solids and greater abundance of Clostridia MBA03 and Disgonomonadacea. Persistence during digestion ranked from least to most, was: Campylobacter (1.6 to >2.9 log10 reduction, according to the BP) < E. coli (1.8 to 2.2 log10) < Salmonella (1.1 to 1.4 log10) < enterococci (0.2 to 1.2 log10) and C. perfringens (0.2 to 1 log10) < L. monocytogenes (-1.2 to 1.6 log10) < C. difficile and C. botulinum (≤0.5 log10). No statistical link was found between the reduction in the concentration of the targeted bacteria and the physicochemical and operational parameters likely to have an effect (NH3, volatile fatty acids and total solids contents, hydraulic retention time, presence of co-substrates), underlining the fact that the fate of the bacteria during mesophilic digestion depends on many interacting factors. The reduction in concentrations varied significantly over the sampling period, underlining the need for longitudinal studies to estimate the impact of AD on pathogenic microorganisms.
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Affiliation(s)
| | - Céline Druilhe
- INRAE, UR OPAALE, 17 Avenue de Cucillé, CS64427, Rennes F-35044, France
| | - Caroline Le Maréchal
- ANSES, Ploufragan-Plouzané-Niort Laboratory, UHQPAP, 31 Rue des Fusillés, BP53, F-22440, France
| | - Elisabeth Repérant
- ANSES, Ploufragan-Plouzané-Niort Laboratory, UHQPAP, 31 Rue des Fusillés, BP53, F-22440, France
| | - Evelyne Boscher
- ANSES, Ploufragan-Plouzané-Niort Laboratory, UHQPAP, 31 Rue des Fusillés, BP53, F-22440, France
| | - Christine Ziebal
- INRAE, UR OPAALE, 17 Avenue de Cucillé, CS64427, Rennes F-35044, France
| | - Laure Martin
- ANSES, Ploufragan-Plouzané-Niort Laboratory, UHQPAP, 31 Rue des Fusillés, BP53, F-22440, France
| | - Megane Lebreton
- INRAE, UR OPAALE, 17 Avenue de Cucillé, CS64427, Rennes F-35044, France
| | - Sandra Rouxel
- ANSES, Ploufragan-Plouzané-Niort Laboratory, UHQPAP, 31 Rue des Fusillés, BP53, F-22440, France
| | - Catherine Houdayer
- ANSES, Ploufragan-Plouzané-Niort Laboratory, UHQPAP, 31 Rue des Fusillés, BP53, F-22440, France
| | - Sophie Le Roux
- INRAE, UR OPAALE, 17 Avenue de Cucillé, CS64427, Rennes F-35044, France
| | - Lorine Derongs
- INRAE, UR OPAALE, 17 Avenue de Cucillé, CS64427, Rennes F-35044, France
| | - Typhaine Poëzévara
- ANSES, Ploufragan-Plouzané-Niort Laboratory, UHQPAP, 31 Rue des Fusillés, BP53, F-22440, France
| | - Martine Sarrazin
- INRAE, UR OPAALE, 17 Avenue de Cucillé, CS64427, Rennes F-35044, France
| | - Bérengère Nagard
- ANSES, Ploufragan-Plouzané-Niort Laboratory, UHQPAP, 31 Rue des Fusillés, BP53, F-22440, France
| | | | - Martine Denis
- ANSES, Ploufragan-Plouzané-Niort Laboratory, UHQPAP, 31 Rue des Fusillés, BP53, F-22440, France
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8
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D' Bastiani C, Kennedy D, Reynolds A. CFD simulation of anaerobic granular sludge reactors: A review. WATER RESEARCH 2023; 242:120220. [PMID: 37354837 DOI: 10.1016/j.watres.2023.120220] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 05/06/2023] [Accepted: 06/11/2023] [Indexed: 06/26/2023]
Abstract
Anaerobic digestion processes can generate renewable energy in the form of biogas while treating organic wastewater. The generation of biogas within anaerobic digestion systems is directly linked to the mixing conditions inside the reactors. In high-rate reactors such as the upflow anaerobic sludge blanket (UASB) reactor, the expanded granular sludge bed (EGSB) reactor and the internal circulation (IC) reactor, the hydrodynamic behaviour will depend on the interactions between the wastewater, the biogas, and the biomass granules. Over the past few years, various researchers have used computational fluid dynamics (CFD) to study the hydrodynamic behaviour in these types of reactors. This review aims to present and critically discuss the state of the art in the use of CFD applied to anaerobic granular sludge reactors (AGSRs). It briefly introduces and discusses the various aspects of modelling. It also reviews the various papers which used CFD to model these reactors and critically analyses the models used for the simulations in terms of general approaches and single-phase vs multiphase studies. The methods used in the validation of the CFD models are also described and discussed. Based on the findings, the challenges and future perspectives for the CFD modelling of AGSRs are discussed and gaps in the knowledge are identified.
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Affiliation(s)
- Camila D' Bastiani
- School of Mechanical Engineering, Technological University Dublin, Bolton St, Dublin 1, D01 K822, Ireland.
| | - David Kennedy
- School of Mechanical Engineering, Technological University Dublin, Bolton St, Dublin 1, D01 K822, Ireland
| | - Anthony Reynolds
- School of Mechanical Engineering, Technological University Dublin, Bolton St, Dublin 1, D01 K822, Ireland; Environmental Sustainability and Health Institute, Technological University Dublin, Greenway Hub, Grangegorman, Dublin 7, D07 H6K8, Ireland
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Liu K, Eberlein C, Edalati A, Zhang R, Westphal A. Nematode-Suppressive Potential of Digestates to Meloidogyne incognita and Heterodera schachtii. PLANT DISEASE 2023; 107:2384-2394. [PMID: 36627810 DOI: 10.1094/pdis-09-22-2101-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Management of plant-parasitic nematodes uses host plant resistance, crop rotation, cultural methods, and nematicide applications. Host plant resistance is tedious to develop, and crop rotation and cultural methods are challenging to use. Environmental and human health concerns render sole reliance on chemical nematode suppression nonsustainable. Previously, digestate from anaerobically fermented maize silage suppressed Heterodera schachtii in Beta vulgaris crops. Here, seven digestates were investigated for nematode suppressive potential: liquid dairy manure digestate (LDMD), liquid dairy manure digestate with ammonia removed (LDMDA-), food waste digestate (FWD), liquid food waste digestate with ammonia removed (LFWDA-), liquid food waste digestate (LFWD), food waste hydrolysate from the Renewable Energy Anaerobic Digester (HREAD), and food waste hydrolysate from the South Area Transfer Station in Sacramento (HSATS). In a red radish (Raphanus sativus) bioassay with H. schachtii, digestates were amended at rates of 0.02, 0.11, 0.57, and 2.86 ml per 100 cm3 of soil. At a rate of 2.86 ml, all amendments except LDMDA- and LFWDA- significantly reduced juvenile root penetration compared with the infested control. In a greenhouse watermelon (Citrullus lanatus) bioassay with Meloidogyne incognita, amendments FWD, LFWD, HREAD, and HSATS as well as LDMD (less effectively) at 2.86 and 5.76 ml per 100 cm3 of soil significantly reduced egg masses per root system compared with the nontreated, nematode-infested control. In a microplot experiment with M. incognita and red radish, in the treatment amended with LFWD at 2.37 ml per 100 cm3 of soil, marketable yields were improved by approximately 50% over the nontreated control and were comparable with those in the treatment with the nematicide Reklemel. In a second microplot experiment with M. incognita and watermelon, treatments that contained LFWD at rates of 3.55 ml per 100 cm3 of soil had transient numerical effects of initial nematode suppression that were not maintained throughout the 3-month growth period. The results of these studies demonstrated that digestates FWD and LFWD consistently expressed some nematode-suppressive capacity.
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Affiliation(s)
- Ke Liu
- Department of Nematology, University of California-Riverside, Riverside, CA 92521
| | - Caroline Eberlein
- Department of Nematology, University of California-Riverside, Riverside, CA 92521
| | - Abdelhossein Edalati
- Department of Biological and Agricultural Engineering, University of California-Davis, Davis, CA 95616
| | - Ruihong Zhang
- Department of Biological and Agricultural Engineering, University of California-Davis, Davis, CA 95616
| | - Andreas Westphal
- Department of Nematology, University of California-Riverside, Riverside, CA 92521
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Nguyen TV, Viver T, Smets I, Bernaerts K, Faust K, Lavigne R, Poughon L, Dussap CG, Springael D. Thermocaproicibacter melissae gen. nov., sp. nov., a thermophilic chain-elongating bacterium, producing n-caproate from polymeric carbohydrates. Int J Syst Evol Microbiol 2023; 73. [PMID: 37200213 DOI: 10.1099/ijsem.0.005893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023] Open
Abstract
Strain MDTJ8T is a chain-elongating thermophilic bacterium isolated from a thermophilic acidogenic anaerobic digestor treating human waste while producing the high commodity chemical n-caproate. The strain grows and produces formate, acetate, n-butyrate, n-caproate and lactate from mono-, di- and polymeric saccharides at 37-60 °C (optimum, 50-55 °C) and at pH 5.0-7.0 (optimum, pH 6.5). The organism is an obligate anaerobe, is motile and its cells form rods (0.3-0.5×1.0-3.0 µm) that stain Gram-positive and occur primarily as chains. Phylogenetic analysis of both the 16S rRNA gene and full genome sequence shows that strain MDTJ8T belongs to a group that consists of mesophylic chain-elongating bacteria within the family Oscillospiraceae, being nearest to Caproicibacter fermentans EA1T (94.8 %) and Caproiciproducens galactitolivorans BS-1T (93.7 %). Its genome (1.96 Mbp) with a G+C content of 49.6 mol% is remarkably smaller than those of other chain-elongating bacteria of the family Oscillospiraceae. Pairwise average nucleotide identity and DNA-DNA hybridization values between strain MDJT8T and its mesophilic family members are less than 70 and 35 %, respectively, while pairwise average amino acid identity values are less than 68 %. In addition, strain MDJT8T uses far less carbohydrate and non-carbohydrate substrates compared to its nearest family members. The predominant cellular fatty acids of strain MDTJ8T are C14 : 0, C14 : 0 DMA (dimethyl acetal) and C16 : 0, while its polar lipid profile shows three unidentified glycophospholipids, 11 glycolipids, 13 phospholipids and six unidentified lipids. No respiratory quinones and polyamines are detected. Based on its phylogenetic, genotypic, morphological, physiological, biochemical and chemotaxonomic characteristics, strain MDTJ8T represents a novel species and novel genus of the family Oscillospiraceae and Thermocaproicibacter melissae gen. nov., sp. nov. is proposed as its name. The type strain is MDTJ8T (=DSM 114174T=LMG 32615T=NCCB 100883T).
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Affiliation(s)
- Tinh Van Nguyen
- Division of Soil and Water Management, KU Leuven, Kasteelpark Arenberg 20, B-3001 Heverlee, Belgium
- Institut Pascal, Université Clermont Auvergne, Avenue Blaise Pascal 4, F-63178 Aubiére cedex, France
| | - Tomeu Viver
- Marine Microbiology Group, Mediterranean Institute of Advanced Studies (CSIC-UIB), C/Miquel Marquès 21, 07190 Esporles, Spain
| | - Ilse Smets
- Chemical Reactor Engineering and Safety, KU Leuven, Celestijnenlaan 200F, B-3001, Heverlee, Belgium
| | - Kristel Bernaerts
- Chemical Reactor Engineering and Safety, KU Leuven, Celestijnenlaan 200F, B-3001, Heverlee, Belgium
| | - Karoline Faust
- Laboratory of Molecular Bacteriology (Rega Institute), KU Leuven, Herestraat 49, B-3000 Leuven, Belgium
| | - Rob Lavigne
- Laboratory of Gene Technology, KU Leuven, Kasteelpark Arenberg 21, B-3001 Heverlee, Belgium
| | - Laurent Poughon
- Institut Pascal, Université Clermont Auvergne, Avenue Blaise Pascal 4, F-63178 Aubiére cedex, France
| | - Claude-Gilles Dussap
- Institut Pascal, Université Clermont Auvergne, Avenue Blaise Pascal 4, F-63178 Aubiére cedex, France
| | - Dirk Springael
- Division of Soil and Water Management, KU Leuven, Kasteelpark Arenberg 20, B-3001 Heverlee, Belgium
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11
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Van Nguyen T, Viver T, Mortier J, Liu B, Smets I, Bernaerts K, Faust K, Lavigne R, Poughon L, Dussap CG, Springael D. Isolation and characterization of a thermophilic chain elongating bacterium that produces the high commodity chemical n-caproate from polymeric carbohydrates. BIORESOURCE TECHNOLOGY 2023; 367:128170. [PMID: 36283667 DOI: 10.1016/j.biortech.2022.128170] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/15/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
A thermophilic chain elongating bacterium, strain MDTJ8, was isolated from a thermophilic acidogenic anaerobic digestor producing n-caproate from human waste, growing optimally at 50-55 °C and pH 6.5. 16S rRNA gene analysis suggests that MDTJ8 represents a new species/genus within a group currently composed of mesophilic chain elongators of the Oscillospiraceae family. Genome analysis showed that strain MDTJ8 contains homologues of genes encoding for chain elongation and energy conservation but also indicated n-caproate production from carbohydrates including polymeric substances. This was confirmed by culturing experiments in which MDTJ8 converted, at pH 6.5 and 55 °C, mono-, di- and polymeric carbohydrates (starch and hemicellulose) to n-caproate reaching concentrations up to 283 mg/L and accounting for up to 10 % of the measured fermentation products. MDTJ8 is the first axenic organism that thermophilically performs chain elongation, opening doors to understand and intensify thermophilic bioprocesses targeting anaerobic digestion towards the production of the value-added chemical n-caproate.
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Affiliation(s)
- Tinh Van Nguyen
- Division of Soil and Water Management, KU Leuven, Kasteelpark Arenberg 20, B-3001 Heverlee, Belgium; Institut Pascal, Université Clermont Auvergne, Avenue Blaise Pascal 4, F-63178 Aubiére cedex, France
| | - Tomeu Viver
- Marine Microbiology Group, Mediterranean Institute of Advanced Studies (CSIC-UIB), C/Miquel Marqués 21, 07190 Esporles, Spain
| | - Jonah Mortier
- Division of Soil and Water Management, KU Leuven, Kasteelpark Arenberg 20, B-3001 Heverlee, Belgium
| | - Bin Liu
- Laboratory of Molecular Bacteriology (Rega Institute), KU Leuven, Herestraat 49, B-3000 Leuven, Belgium
| | - Ilse Smets
- Chemical Reactor Engineering and Safety, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
| | - Kristel Bernaerts
- Chemical Reactor Engineering and Safety, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
| | - Karoline Faust
- Laboratory of Molecular Bacteriology (Rega Institute), KU Leuven, Herestraat 49, B-3000 Leuven, Belgium
| | - Rob Lavigne
- Laboratory of Gene Technology, KU Leuven, Kasteelpark Arenberg 21, B-3001 Heverlee, Belgium
| | - Laurent Poughon
- Institut Pascal, Université Clermont Auvergne, Avenue Blaise Pascal 4, F-63178 Aubiére cedex, France
| | - Claude-Gilles Dussap
- Institut Pascal, Université Clermont Auvergne, Avenue Blaise Pascal 4, F-63178 Aubiére cedex, France
| | - Dirk Springael
- Division of Soil and Water Management, KU Leuven, Kasteelpark Arenberg 20, B-3001 Heverlee, Belgium.
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12
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Cazaudehore G, Guyoneaud R, Lallement A, Gassie C, Monlau F. Biochemical methane potential and active microbial communities during anaerobic digestion of biodegradable plastics at different inoculum-substrate ratios. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 324:116369. [PMID: 36202034 DOI: 10.1016/j.jenvman.2022.116369] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 09/22/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
The influence of the inoculum-substrate ratio (ISR) on the mesophilic and thermophilic biochemical methane potential test of two biodegradable plastics was evaluated. Poly(lactic acid) (PLA) and polyhydroxybutyrate (PHB) were selected for this study, the first for being recalcitrant to mesophilic anaerobic digestion (AD) and the second, by contrast, for being readily biodegradable. Several ISRs, calculated on the basis of volatile solids (VS), were tested: 1, 2, 2.85, 4, and 10 g(VS of inoculum).g(VS of substrate)-1. A high ISR was associated with an enhanced methane production rate (i.e., biodegradation kinetics). However, the ultimate methane production did not change, except when inhibition was observed. Indeed, applying the lowest ISR to readily biodegradable plastics such as PHB resulted in inhibition of methane production. Based on these experiments, in order to have reproducible degradation kinetics and optimal methane production, an ISR between 2.85 and 4 is recommended for biodegradable plastics. The active microbial communities were analyzed, and the active bacteria differed depending on the plastic digested (PLA versus PHB) and the temperature of the process (mesophilic versus thermophilic). Previously identified PHB degraders (Ilyobacter delafieldii and Enterobacter) were detected in PHB-fed reactors. Thermogutta and Tepidanaerobacter were detected during the thermophilic AD of PLA, and they are probably involved in PLA hydrolysis and lactate conversion, respectively.
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Affiliation(s)
- G Cazaudehore
- APESA, Pôle Valorisation, 64121 Montardon, France; Université de Pau et des Pays de l'Adour / E2S UPPA / CNRS, IPREM UMR5254, Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux, Chimie et Microbiologie de l'Environnement, 64000, Pau, France.
| | - R Guyoneaud
- Université de Pau et des Pays de l'Adour / E2S UPPA / CNRS, IPREM UMR5254, Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux, Chimie et Microbiologie de l'Environnement, 64000, Pau, France
| | - A Lallement
- APESA, Pôle Valorisation, 64121 Montardon, France
| | - C Gassie
- Université de Pau et des Pays de l'Adour / E2S UPPA / CNRS, IPREM UMR5254, Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux, Chimie et Microbiologie de l'Environnement, 64000, Pau, France
| | - F Monlau
- APESA, Pôle Valorisation, 64121 Montardon, France
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13
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Palakodeti A, Rupani PF, Azman S, Dewil R, Appels L. Novel approach to ammonia recovery from anaerobic digestion via side-stream stripping at multiple pH levels. BIORESOURCE TECHNOLOGY 2022; 361:127685. [PMID: 35878773 DOI: 10.1016/j.biortech.2022.127685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 07/14/2022] [Accepted: 07/19/2022] [Indexed: 06/15/2023]
Abstract
Ammonia recovery from anaerobic digesters via side-stream stripping is a technique to recover nitrogen from manure wastes. This study demonstrated a novel approach to determining ammonia recovery to maintain total ammonia concentrations in the digester in the range of 1.7-2.1 gN/L. Increasing the pH during stripping from 8, 8.5 to 9.5 did not affect the stability of the digester. Methane yields of 60-80 mL/(gVS.d) and volatile fatty acid concentrations of 0-500 mg/L were reported throughout its operation. The low solubilisation increase upon recirculation of the digestate explained the lack of change in methane yields due to side-stream stripping. Increasing the pH during stripping also did not affect the digester's operating pH, which was attributed to the neutralising effect of biogas as stripping gas. Therefore, total ammonia concentrations in the digester can be controlled by determining the extent of ammonia recovery, and the pH during stripping can be increased without compromising the digester's stability.
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Affiliation(s)
- Advait Palakodeti
- KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, J. De Nayerlaan 5, B-2860 Sint-Katelijne-Waver, Belgium.
| | - Parveen Fatemeh Rupani
- KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, J. De Nayerlaan 5, B-2860 Sint-Katelijne-Waver, Belgium.
| | - Samet Azman
- Avans University of Applied Sciences, Academy of Life Sciences and Technology, Lovensdijkstraat 61, 4818 AJ, Breda, Netherlands
| | - Raf Dewil
- KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, J. De Nayerlaan 5, B-2860 Sint-Katelijne-Waver, Belgium; University of Oxford, Department of Engineering Science, Parks Road, Oxford OX1 3PJ, United Kingdom.
| | - Lise Appels
- KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, J. De Nayerlaan 5, B-2860 Sint-Katelijne-Waver, Belgium.
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14
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Kabaivanova L, Petrova P, Hubenov V, Simeonov I. Biogas Production Potential of Thermophilic Anaerobic Biodegradation of Organic Waste by a Microbial Consortium Identified with Metagenomics. Life (Basel) 2022; 12:life12050702. [PMID: 35629369 PMCID: PMC9148150 DOI: 10.3390/life12050702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 05/04/2022] [Accepted: 05/06/2022] [Indexed: 01/21/2023] Open
Abstract
Anaerobic digestion (AD) is a widespread biological process treating organic waste for green energy production. In this study, wheat straw and corn stalks without any harsh preliminary treatment were collected as a renewable source to be employed in a laboratory-scale digester to produce biogas/biomethane. Processes parameters of temperature, pH, total solids, volatile solid, concentration of volatile fatty acids (VFA), and cellulose concentration, were followed. The volume of biogas produced was measured. The impact of organic loading was stated, showing that the process at 55 °C tolerated a higher substrate load, up to 45 g/L. Further substrate increase did not lead to biogas accumulation increase, probably due to inhibition or mass transfer limitations. After a 12-day anaerobic digestion process, cumulative volumes of biogas yields were 4.78 L for 1 L of the bioreactor working volume with substrate loading 30 g/L of wheat straw, 7.39 L for 40 g/L and 8.22 L for 45 g/L. The degree of biodegradation was calculated to be 68.9%, 74% and 72%, respectively. A fast, effective process for biogas production was developed from native wheat straw, with the highest quantity of daily biogas production occurring between day 2 and day 5. Biomethane concentration in the biogas was 60%. An analysis of bacterial diversity by metagenomics revealed that more than one third of bacteria belonged to class Clostridia (32.9%), followed by Bacteroidia (21.5%), Betaproteobacteria (11.2%), Gammaproteobacteria (6.1%), and Alphaproteobacteria (5%). The most prominent genera among them were Proteiniphilum, Proteiniborus, and Pseudomonas. Archaeal share was 1.37% of the microflora in the thermophilic bioreactor, as the genera Methanocorpusculum, Methanobacterium, Methanomassiliicoccus, Methanoculleus, and Methanosarcina were the most abundant. A knowledge of the microbiome residing in the anaerobic digester can be further used for the development of more effective processes in conjunction with theidentified consortium.
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15
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Mathematical Model of a Thermophilic Anaerobic Digestion for Methane Production of Wheat Straw. Processes (Basel) 2022. [DOI: 10.3390/pr10040742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
This paper presents a newly created mathematical model of thermophilic anaerobic digestion of wheat straw carried out in a 2 dm3 bioreactor for methane production. Two batch processes, with 30 mL/dm3 and 35 mL/dm3 organic load, are carried out—one set for parameter identification and one set for model verification. The identification of model parameter values is based on dynamical experiments. It is fulfilled using two different techniques: deterministic sequential quadratic programming algorithm and metaheuristic genetic algorithm. Verification of the developed mathematical models is conducted based on the different data sets of the process. Both models predict the set of the experimental data for all considered process variables well. Genetic algorithm visually fits the data with a higher degree of accuracy, as confirmed by the numerical results for the objective function value.
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16
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Westerholm M, Calusinska M, Dolfing J. Syntrophic propionate-oxidizing bacteria in methanogenic systems. FEMS Microbiol Rev 2022; 46:fuab057. [PMID: 34875063 PMCID: PMC8892533 DOI: 10.1093/femsre/fuab057] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 12/03/2021] [Indexed: 12/04/2022] Open
Abstract
The mutual nutritional cooperation underpinning syntrophic propionate degradation provides a scant amount of energy for the microorganisms involved, so propionate degradation often acts as a bottleneck in methanogenic systems. Understanding the ecology, physiology and metabolic capacities of syntrophic propionate-oxidizing bacteria (SPOB) is of interest in both engineered and natural ecosystems, as it offers prospects to guide further development of technologies for biogas production and biomass-derived chemicals, and is important in forecasting contributions by biogenic methane emissions to climate change. SPOB are distributed across different phyla. They can exhibit broad metabolic capabilities in addition to syntrophy (e.g. fermentative, sulfidogenic and acetogenic metabolism) and demonstrate variations in interplay with cooperating partners, indicating nuances in their syntrophic lifestyle. In this review, we discuss distinctions in gene repertoire and organization for the methylmalonyl-CoA pathway, hydrogenases and formate dehydrogenases, and emerging facets of (formate/hydrogen/direct) electron transfer mechanisms. We also use information from cultivations, thermodynamic calculations and omic analyses as the basis for identifying environmental conditions governing propionate oxidation in various ecosystems. Overall, this review improves basic and applied understanding of SPOB and highlights knowledge gaps, hopefully encouraging future research and engineering on propionate metabolism in biotechnological processes.
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Affiliation(s)
- Maria Westerholm
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, BioCentre, Almas allé 5, SE-75007 Uppsala, Sweden
| | - Magdalena Calusinska
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, rue du Brill 41, L-4422 Belvaux, Luxembourg
| | - Jan Dolfing
- Faculty of Energy and Environment, Northumbria University, Wynne Jones 2.11, Ellison Place, Newcastle-upon-Tyne NE1 8QH, UK
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17
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Liu R, Zhang K, Chen X, Xiao B. Effects of substrate organic composition on mesophilic and thermophilic anaerobic co-digestion of food waste and paper waste. CHEMOSPHERE 2022; 291:132933. [PMID: 34800507 DOI: 10.1016/j.chemosphere.2021.132933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 10/30/2021] [Accepted: 11/14/2021] [Indexed: 06/13/2023]
Abstract
Facing the huge output of food waste (FW) and paper waste (PW), long-term semi-continuous experiments were carried out to investigate the effect of the substrate organic composition on mesophilic and thermophilic anaerobic co-digestions (Co-ADs) of their mixtures. The experimental results showed that the organic composition of the substrate affected the biogas and methane production and yield of the two Co-ADs of the FW and PW mixtures, and its effect on thermophilic Co-AD (Co-TAD) was lower than that on mesophilic Co-AD (Co-MAD). The two Co-ADs had similar biogas (2.158 ± 0.136 L/L/d and 2.183 ± 0.142 L/L/d) and methane production (1.245 ± 0.082 L/L/d and 1.279 ± 0.088 L/L/d), and organic matter degradation (81.79 ± 1.07% and 83.81 ± 1.09%) when the substrate organic composition was carbohydrates:proteins:lipids = 6.8:1.8:1 (low carbohydrate composition, FW:PW = 4:1). When the substrate organic composition was carbohydrates:proteins:lipids = 13.5:2:1 (high carbohydrate composition, FW:PW = 1:1), the thermophilic temperature was more favorable than the mesophilic temperature for the Co-AD of FW and PW mixtures. The characteristics (pH, total ammonia, total volatile fatty acids, and total alkalinity) of the Co-TAD digestate were more sensitive to changes in the organic composition of the substrate than those of the Co-MAD digestate. Increasing the carbohydrate content of the FW:PW mixture lowered the production of biogas and methane, and degradation of organic matter in both Co-ADs.
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Affiliation(s)
- Rongzhan Liu
- College of Textile and Clothing, Qingdao University, Qingdao, 266071, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Ke Zhang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiangyu Chen
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Benyi Xiao
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
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18
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Ekstrand EM, Björn A, Karlsson A, Schnürer A, Kanders L, Yekta SS, Karlsson M, Moestedt J. Identifying targets for increased biogas production through chemical and organic matter characterization of digestate from full-scale biogas plants: what remains and why? BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2022; 15:16. [PMID: 35418216 PMCID: PMC8830174 DOI: 10.1186/s13068-022-02103-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 01/01/2022] [Indexed: 11/10/2022]
Abstract
Background This study examines the destiny of macromolecules in different full-scale biogas processes. From previous studies it is clear that the residual organic matter in outgoing digestates can have significant biogas potential, but the factors dictating the size and composition of this residual fraction and how they correlate with the residual methane potential (RMP) are not fully understood. The aim of this study was to generate additional knowledge of the composition of residual digestate fractions and to understand how they correlate with various operational and chemical parameters. The organic composition of both the substrates and digestates from nine biogas plants operating on food waste, sewage sludge, or agricultural waste was characterized and the residual organic fractions were linked to substrate type, trace metal content, ammonia concentration, operational parameters, RMP, and enzyme activity. Results Carbohydrates represented the largest fraction of the total VS (32–68%) in most substrates. However, in the digestates protein was instead the most abundant residual macromolecule in almost all plants (3–21 g/kg). The degradation efficiency of proteins generally lower (28–79%) compared to carbohydrates (67–94%) and fats (86–91%). High residual protein content was coupled to recalcitrant protein fractions and microbial biomass, either from the substrate or formed in the degradation process. Co-digesting sewage sludge with fat increased the protein degradation efficiency with 18%, possibly through a priming mechanism where addition of easily degradable substrates also triggers the degradation of more complex fractions. In this study, high residual methane production (> 140 L CH4/kg VS) was firstly coupled to operation at unstable process conditions caused mainly by ammonia inhibition (0.74 mg NH3-N/kg) and/or trace element deficiency and, secondly, to short hydraulic retention time (HRT) (55 days) relative to the slow digestion of agricultural waste and manure. Conclusions Operation at unstable conditions was one reason for the high residual macromolecule content and high RMP. The outgoing protein content was relatively high in all digesters and improving the degradation of proteins represents one important way to increase the VS reduction and methane production in biogas plants. Post-treatment or post-digestion of digestates, targeting microbial biomass or recalcitrant protein fractions, is a potential way to achieve increased protein degradation. Supplementary Information The online version contains supplementary material available at 10.1186/s13068-022-02103-3.
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Affiliation(s)
- Eva-Maria Ekstrand
- Department of Thematic Studies - Environmental Change, Linköping University, 58183, Linköping, Sweden.,Biogas Research Center, Linköping University, 58183, Linköping, Sweden
| | - Annika Björn
- Department of Thematic Studies - Environmental Change, Linköping University, 58183, Linköping, Sweden.,Biogas Research Center, Linköping University, 58183, Linköping, Sweden
| | - Anna Karlsson
- Biogas Research Center, Linköping University, 58183, Linköping, Sweden.,Scandinavian Biogas Fuels AB, Holländargatan 21A, 111 60, Stockholm, Sweden
| | - Anna Schnürer
- Department of Thematic Studies - Environmental Change, Linköping University, 58183, Linköping, Sweden.,Biogas Research Center, Linköping University, 58183, Linköping, Sweden.,Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala BioCenter, Box 7025, 750 07, Uppsala, Sweden
| | - Linda Kanders
- Biogas Research Center, Linköping University, 58183, Linköping, Sweden.,Purac AB, Box 1146, 221 05, Lund, Sweden
| | - Sepehr Shakeri Yekta
- Department of Thematic Studies - Environmental Change, Linköping University, 58183, Linköping, Sweden.,Biogas Research Center, Linköping University, 58183, Linköping, Sweden
| | - Martin Karlsson
- Biogas Research Center, Linköping University, 58183, Linköping, Sweden.,Molecular Biotechnology, Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - Jan Moestedt
- Department of Thematic Studies - Environmental Change, Linköping University, 58183, Linköping, Sweden. .,Biogas Research Center, Linköping University, 58183, Linköping, Sweden. .,Department of Biogas R&D, Tekniska verken i Linköping AB, Box 1500, 581 15, Linköping, Sweden.
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19
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Recovery of Household Waste by Generation of Biogas as Energy and Compost as Bio-Fertilizer—A Review. Processes (Basel) 2021. [DOI: 10.3390/pr10010081] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Nowadays, organic waste and especially household waste represents a significant global issue due to population growth. The anaerobic digestion (AD) process is an essential operation contributing powerfully to the valorization of organic waste including food waste in terms of renewable energy generation (biogas) and the rich-nutrient residue that can be utilized as bio-fertilizer. Thus, this process (AD) allows for good recovery of household waste by generating biogas and compost. However, the AD operation has been affected by several key factors. In this paper, we aim to involve different critical parameters influencing the AD process, including temperature, pH, organic loading rate (OLR), carbon to nitrogen ratio (C/N), and total solid content (TS(%)). Further, the paper highlights the inhibition caused by the excessive accumulation of volatile fatty acids (VFAs) and ammoniac, which exhibits the positive effects of co-digestion, pretreatment methods, and mixing techniques for maintaining process stability and enhancing biogas production. We analyze some current mathematical models explored in the literature, such as distinct generic, non-structural, combined, and kinetic first-order models. Finally, the study discusses challenges, provides some possible solutions, and a future perspective that promises to be a highly useful resource for researchers working in the field of household waste recovery for the generation of biogas.
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20
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Lallement A, Siaud A, Peyrelasse C, Kaparaju P, Schraauwers B, Maunas S, Monlau F. Impact of Operational Factors, Inoculum Origin, and Feedstock Preservation on the Biochemical Methane Potential. Bioengineering (Basel) 2021; 8:bioengineering8110176. [PMID: 34821742 PMCID: PMC8614716 DOI: 10.3390/bioengineering8110176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/29/2021] [Accepted: 11/01/2021] [Indexed: 11/16/2022] Open
Abstract
Anaerobic digestion for the valorization of organic wastes into biogas is gaining worldwide interest. Nonetheless, the sizing of the biogas plant units require knowledge of the quantity of feedstock, and their associated methane potentials, estimated widely by Biochemical Methane Potential (BMP) tests. Discrepancies exist among laboratories due to variability of protocols adopted and operational factors used. The aim of this study is to verify the influence of some operational factors (e.g., analysis frequency, trace elements and vitamins solution addition and flushing gas), feedstock conservation and the source of inoculum on BMP. Among the operational parameters tested on cellulose degradation, only the type of gas used for flushing headspace of BMP assays had shown a significant influence on methane yields from cellulose. Methane yields of 344 ± 6 NL CH4 kg−1 VS and 321 ± 10 NL CH4 kg−1 VS obtained from assays flushed with pure N2 and N2/CO2 (60/40 v/v). The origin of inoculum (fed in co-digestion) only significantly affected the methane yields for straw, 253 ± 3 and 333 ± 3 NL CH4 kg−1 VS. Finally, freezing/thawing cycle effect depended of the substrate (tested on biowaste, manure, straw and WWTP sludge) with a possible effect of water content substrate.
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Affiliation(s)
- Audrey Lallement
- APESA, Pôle Valorisation, Cap Ecologia, Avenue Fréderic Joliot Curie, 64230 Lescar, France; (A.L.); (A.S.); (C.P.); (B.S.); (S.M.)
| | - Aline Siaud
- APESA, Pôle Valorisation, Cap Ecologia, Avenue Fréderic Joliot Curie, 64230 Lescar, France; (A.L.); (A.S.); (C.P.); (B.S.); (S.M.)
| | - Christine Peyrelasse
- APESA, Pôle Valorisation, Cap Ecologia, Avenue Fréderic Joliot Curie, 64230 Lescar, France; (A.L.); (A.S.); (C.P.); (B.S.); (S.M.)
| | - Prasad Kaparaju
- School of Engineering and Built Environment, Nathan Campus, Griffith University, Brisbane, QLD 4111, Australia;
| | - Blandine Schraauwers
- APESA, Pôle Valorisation, Cap Ecologia, Avenue Fréderic Joliot Curie, 64230 Lescar, France; (A.L.); (A.S.); (C.P.); (B.S.); (S.M.)
| | - Samuel Maunas
- APESA, Pôle Valorisation, Cap Ecologia, Avenue Fréderic Joliot Curie, 64230 Lescar, France; (A.L.); (A.S.); (C.P.); (B.S.); (S.M.)
| | - Florian Monlau
- APESA, Pôle Valorisation, Cap Ecologia, Avenue Fréderic Joliot Curie, 64230 Lescar, France; (A.L.); (A.S.); (C.P.); (B.S.); (S.M.)
- Correspondence:
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21
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Baniamerian H, Ghofrani-Isfahani P, Tsapekos P, Alvarado-Morales M, Shahrokhi M, Angelidaki I. Multicomponent nanoparticles as means to improve anaerobic digestion performance. CHEMOSPHERE 2021; 283:131277. [PMID: 34182648 DOI: 10.1016/j.chemosphere.2021.131277] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 06/09/2021] [Accepted: 06/15/2021] [Indexed: 06/13/2023]
Abstract
Sufficient quantity of trace metals is essential for a well performing anaerobic digestion (AD) process. Among the essential trace elements in active sites of multiple important enzymes for AD are iron and nickel ions. In the present study, iron and nickel in the form of Fe2O3 and NiO were coated on TiO2 nanoparticles to be used in batch and continuous operation mode. The effect of TiO2, Fe2O3-TiO2, and NiO-TiO2 nanoparticles on each step of AD process was assessed utilizing simple substrates (i.e. cellulose, glucose, acetic acid, and mixture of H2-CO2) as well as complex ones (i.e. municipal biopulp). The hydrolysis rate of cellulose substrate increased with higher dosages of the coated TiO2 with both metals. For instance, the hydrolysis rate was increased up to 54% at Fe2O3-TiO2 and at a concentration of 23.5 mg/L for NiO-TiO2 it was increased up to 58%, while higher dosage suppressed the hydrolytic activity. Experimental results revealed that low dosages of NiO-TiO2 increased the accumulated methane production up to 24% probably by increasing the enzymatic activity of acetoclastic methanogenesis. NiO-TiO2 showed positive effect on batch and continuous AD of biopulp and improved methane yield up to 8%.
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Affiliation(s)
- Hamed Baniamerian
- Department of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs. Lyngby, DK-2800, Denmark
| | - Parisa Ghofrani-Isfahani
- Department of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs. Lyngby, DK-2800, Denmark; Department of Chemical and Petroleum Engineering, Sharif University of Technology, P.O. Box 11365-9465, Azadi Ave., Tehran, Iran
| | - Panagiotis Tsapekos
- Department of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs. Lyngby, DK-2800, Denmark
| | - Merlin Alvarado-Morales
- Department of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs. Lyngby, DK-2800, Denmark
| | - Mohammad Shahrokhi
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, P.O. Box 11365-9465, Azadi Ave., Tehran, Iran.
| | - Irini Angelidaki
- Department of Chemical and Biochemical Engineering, Technical University of Denmark, Kgs. Lyngby, DK-2800, Denmark.
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22
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Banu JR, Kumar G, Chattopadhyay I. Management of microbial enzymes for biofuels and biogas production by using metagenomic and genome editing approaches. 3 Biotech 2021; 11:429. [PMID: 34603908 DOI: 10.1007/s13205-021-02962-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 08/04/2021] [Indexed: 12/16/2022] Open
Abstract
Non-renewable fossil fuels such as bitumen, coal, natural gas, oil shale, and petroleum are depleting over the world owing to unrestricted consumption. Biofuels such as biodiesel, biobutanol, bioethanol, and biogas are considered an eco-friendly and cost-effective alternatives of fossil fuels. For energy sustainability, the production of advanced biofuels is required. The advancement of genetic and metabolic engineering in microbial cells played a significant contribution to biofuels overproduction. Essential approaches such as next-generation sequencing technologies and CRISPR/Cas9-mediated genome editing of microbial cells are required for the mass manufacture of biofuels globally. Advanced "omics" approaches are used to construct effective microorganisms for biofuels manufacturing. A new investigation is required to augment the production of lignocellulosic-based biofuels with minimal use of energy. Advanced areas of metabolic engineering are introduced in the manufacture of biofuels by the use of engineered microbial strains. Genetically modified microorganisms are used for the production of biofuels in large quantities at a low-cost.
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Affiliation(s)
- J Rajesh Banu
- Department of Life Sciences, Central University of Tamil Nadu, Thiruvarur, Tamilnadu India
| | - Gopalakrishnan Kumar
- Faculty of Science and Technology, Institute of Chemistry, Bioscience and Environmental Engineering, University of Stavanger, Forus, Box 8600, 4036 Stavanger, Norway
| | - Indranil Chattopadhyay
- Department of Life Sciences, Central University of Tamil Nadu, Thiruvarur, Tamilnadu India
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Cazaudehore G, Monlau F, Gassie C, Lallement A, Guyoneaud R. Methane production and active microbial communities during anaerobic digestion of three commercial biodegradable coffee capsules under mesophilic and thermophilic conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 784:146972. [PMID: 33892320 DOI: 10.1016/j.scitotenv.2021.146972] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 03/15/2021] [Accepted: 04/01/2021] [Indexed: 06/12/2023]
Abstract
Biodegradable plastics market is increasing these last decades, including for coffee capsules. Anaerobic digestion, as a potential end-of-life scenario for plastic waste, has to be investigated. For this purpose, mesophilic (38 °C) and thermophilic (58 °C) anaerobic digestion tests on three coffee capsules made up with biodegradable plastic (Beanarella®, Launay® or Tintoretto®) and spent coffee (control) were compared by their methane production and the microbial communities active during the process. Mesophilic biodegradation of the capsules was slow and did not reach completion after 100 days, methane production ranged between 67 and 127 NL (CH4) kg-1 (VS). Thermophilic anaerobic digestion resulted in a better biodegradation and reached completion around 100 days, methane productions were between 257 and 294 NL (CH4) kg-1 (VS). The microbial populations from the reactors fed with plastics versus spent coffee grounds were significantly different, under both the mesophilic and the thermophilic conditions. However, the different biodegradable plastics only had a small impact on the main microbial community composition at a similar operational temperature and sampling time. Interestingly, the genus Tepidimicrobium was identified as a potential key microorganisms involved in the thermophilic conversion of biodegradable plastic in methane.
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Affiliation(s)
- G Cazaudehore
- APESA, Pôle Valorisation, Cap Ecologia, 64230 Lescar, France; Université de Pau et des Pays de l'Adour/E2S UPPA/CNRS, IPREM UMR5254, Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux, Chimie et Microbiologie de l'Environnement, 64000 Pau, France
| | - F Monlau
- APESA, Pôle Valorisation, Cap Ecologia, 64230 Lescar, France
| | - C Gassie
- Université de Pau et des Pays de l'Adour/E2S UPPA/CNRS, IPREM UMR5254, Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux, Chimie et Microbiologie de l'Environnement, 64000 Pau, France
| | - A Lallement
- APESA, Pôle Valorisation, Cap Ecologia, 64230 Lescar, France
| | - R Guyoneaud
- Université de Pau et des Pays de l'Adour/E2S UPPA/CNRS, IPREM UMR5254, Institut des Sciences Analytiques et de Physicochimie pour l'Environnement et les Matériaux, Chimie et Microbiologie de l'Environnement, 64000 Pau, France.
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24
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Wahid R, Horn SJ. Impact of operational conditions on methane yield and microbial community composition during biological methanation in in situ and hybrid reactor systems. BIOTECHNOLOGY FOR BIOFUELS 2021; 14:170. [PMID: 34416924 PMCID: PMC8379887 DOI: 10.1186/s13068-021-02019-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 08/09/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Biogas can be upgraded to methane biologically by adding H2 to biogas reactors. The process is called biological methanation (BM) and can be done in situ in a regular biogas reactor or the biogas can be transferred to a separate ex situ upgrading reactor. The hybrid BM concept, a combination of in situ and ex situ BM, has received little attention, and only a few studies have been reported. The hybrid BM has the advantage of resolving the issue of pH increment during in situ BM, while the size of the ex situ BM reactor could be reduced. RESULTS In this study, the efficiency of in situ and hybrid biological methanation (BM) for upgrading raw biogas was investigated. The hybrid BM system achieved a CH4 yield of 257 mL gVS-1 when degrading a feedstock blend of manure and cheese waste. This represented an increase in methane yield of 76% when compared to the control reactor with no H2 addition. A 2:1 H2:CO2 ratio resulted in stable reactor performance, while a 4:1 ratio resulted in a high accumulation of volatile fatty acids. H2 consumption rate was improved when a low manure-cheese waste ratio (90%:10%) was applied. Furthermore, feeding less frequently (every 48 h) resulted in a higher CH4 production from CO2 and H2. Methanothermobacter was found to dominate the archaeal community in the in situ BM reactor, and its relative abundance increased over the experimental time. Methanosarcina abundance was negatively affected by H2 addition and was nearly non-existent at the end of the experiment. CONCLUSIONS Our results show that hybrid BM outperforms in situ BM in terms of total CH4 production and content of CH4 in the biogas. In comparison to in situ BM, the use of hybrid BM increased CH4 yield by up to 42%. Furthermore, addition of H2 at 2:1 H2:CO2 ratio in in situ BM resulted in stable reactor operation.
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Affiliation(s)
- Radziah Wahid
- Faculty of Chemistry, Biotechnology, and Food Science, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, 1432 Ås, Norway
| | - Svein Jarle Horn
- Faculty of Chemistry, Biotechnology, and Food Science, Norwegian University of Life Sciences (NMBU), P.O. Box 5003, 1432 Ås, Norway
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Gaspari M, Treu L, Zhu X, Palù M, Angelidaki I, Campanaro S, Kougias PG. Microbial dynamics in biogas digesters treating lipid-rich substrates via genome-centric metagenomics. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 778:146296. [PMID: 33714811 DOI: 10.1016/j.scitotenv.2021.146296] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 02/24/2021] [Accepted: 03/02/2021] [Indexed: 06/12/2023]
Abstract
Co-digestion with lipid-rich substrates is a likely strategy in biogas plants, due to their high energy content. However, the process stability is vulnerable to inhibition due to the sudden increase of fatty-acid concentration. Therefore, techniques that promote the adaptation of the microorganisms to the presence of lipids have been proposed. In this frame, the initial hypothesis of the work was that a gradual change in feedstock composition would enable us to elucidate the microbial organisation as a result of deterministic (i.e. chemical composition of influent) and stochastic (e.g. interspecies interactions) factors. This study investigates the response of the biogas microbiome to gradual increment of the Organic Loading Rate by supplementing the influent feedstock with Na-Oleate. The results showed that as a response to the feedstock shifts three clusters describing microbes behaviours were formed. The dynamics and the functional role of the formed microbial clusters were unveiled, providing explanations for their abundance and behavior. Process monitoring indicated that the reactors responded immediately to lipid supplementation and they managed to stabilize their performance in a short period of time. The dominance of Candidatus Methanoculleus thermohydrogenotrophicum in the biogas reactors fed exclusively with cattle manure indicated that the predominant methanogenic pathway was hydrogenotrophic. Additionally, the abundance of this methanogen was further enhanced upon lipid supplementation and its growth was supported by syntrophic bacteria capable to metabolize fatty acids. However, with the shift back to the original feedstock (i.e. solely cattle manure), the microbial dynamicity significantly altered with a remarkable increment in the abundance of a propionate degrader affiliated to the order of Bacteroidales, which became the predominant microorganism of the consortium.
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Affiliation(s)
- Maria Gaspari
- Department of Hydraulics, Soil Science and Agricultural Engineering, Faculty of Agriculture, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece; Soil and Water Resources Institute, Hellenic Agricultural Organisation Demeter, Thermi, Thessaloniki 57001, Greece
| | - Laura Treu
- Department of Biology, University of Padova, 35131 Padova, Italy
| | - Xinyu Zhu
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark
| | - Matteo Palù
- Department of Biology, University of Padova, 35131 Padova, Italy
| | - Irini Angelidaki
- Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark
| | | | - Panagiotis G Kougias
- Soil and Water Resources Institute, Hellenic Agricultural Organisation Demeter, Thermi, Thessaloniki 57001, Greece
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26
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Aigle A, Bourgeois E, Marjolet L, Houot S, Patureau D, Doelsch E, Cournoyer B, Galia W. Relative Weight of Organic Waste Origin on Compost and Digestate 16S rRNA Gene Bacterial Profilings and Related Functional Inferences. Front Microbiol 2021; 12:667043. [PMID: 34054773 PMCID: PMC8160089 DOI: 10.3389/fmicb.2021.667043] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 04/06/2021] [Indexed: 11/13/2022] Open
Abstract
Even though organic waste (OW) recycling via anaerobic digestion (AD) and composting are increasingly used, little is known about the impact of OW origin (fecal matters and food and vegetable wastes) on the end products' bacterial contents. The hypothesis of a predictable bacterial community structure in the end products according to the OW origin was tested. Nine OW treatment plants were selected to assess the genetic structure of bacterial communities found in raw OW according to their content in agricultural and urban wastes and to estimate their modifications through AD and composting. Two main bacterial community structures among raw OWs were observed and matched a differentiation according to the occurrences of urban chemical pollutants. Composting led to similar 16S rRNA gene OTU profiles whatever the OW origin. With a significant shift of about 140 genera (representing 50% of the bacteria), composting was confirmed to largely shape bacterial communities toward similar structures. The enriched taxa were found to be involved in detoxification and bioremediation activities. This process was found to be highly selective and favorable for bacterial specialists. Digestates showed that OTU profiles differentiated into two groups according to their relative content in agricultural (manure) and urban wastes (mainly activated sludge). About one third of the bacterial taxa was significantly affected by AD. In digestates of urban OW, this sorting led to an enrichment of 32 out of the 50 impacted genera, while for those produced from agricultural or mixed urban/agricultural OW (called central OW), a decay of 54 genera over 60 was observed. Bacteria from activated sludge appeared more fit for AD than those of other origins. Functional inferences showed AD enriched genera from all origins to share similar functional traits, e.g., chemoheterotrophy and fermentation, while being often taxonomically distinct. The main functional traits among the dominant genera in activated sludge supported a role in AD. Raw OW content in activated sludge was found to be a critical factor for predicting digestate bacterial contents. Composting generated highly predictable and specialized community patterns whatever the OW origin. AD and composting bacterial changes were driven by functional traits selected by physicochemical factors such as temperature and chemical pollutants.
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Affiliation(s)
- Axel Aigle
- Univ Lyon, UMR Ecologie Microbienne (LEM), Université Claude Bernard Lyon 1, CNRS 5557, INRAE 1418, VetAgro Sup, Marcy L'Etoile, France
| | - Emilie Bourgeois
- Univ Lyon, UMR Ecologie Microbienne (LEM), Université Claude Bernard Lyon 1, CNRS 5557, INRAE 1418, VetAgro Sup, Marcy L'Etoile, France
| | - Laurence Marjolet
- Univ Lyon, UMR Ecologie Microbienne (LEM), Université Claude Bernard Lyon 1, CNRS 5557, INRAE 1418, VetAgro Sup, Marcy L'Etoile, France
| | - Sabine Houot
- UMR ECOSYS, INRAE, AgroParisTech, Thiverval-Grignon, France
| | | | - Emmanuel Doelsch
- CIRAD, UPR Recyclage et risque, Montpellier, France.,Recyclage et Risque, Univ Montpellier, CIRAD, Montpellier, France
| | - Benoit Cournoyer
- Univ Lyon, UMR Ecologie Microbienne (LEM), Université Claude Bernard Lyon 1, CNRS 5557, INRAE 1418, VetAgro Sup, Marcy L'Etoile, France
| | - Wessam Galia
- Univ Lyon, UMR Ecologie Microbienne (LEM), Université Claude Bernard Lyon 1, CNRS 5557, INRAE 1418, VetAgro Sup, Marcy L'Etoile, France
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Maus I, Tubbesing T, Wibberg D, Heyer R, Hassa J, Tomazetto G, Huang L, Bunk B, Spröer C, Benndorf D, Zverlov V, Pühler A, Klocke M, Sczyrba A, Schlüter A. The Role of Petrimonas mucosa ING2-E5A T in Mesophilic Biogas Reactor Systems as Deduced from Multiomics Analyses. Microorganisms 2020; 8:E2024. [PMID: 33348776 PMCID: PMC7768429 DOI: 10.3390/microorganisms8122024] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/11/2020] [Accepted: 12/14/2020] [Indexed: 12/17/2022] Open
Abstract
Members of the genera Proteiniphilum and Petrimonas were speculated to represent indicators reflecting process instability within anaerobic digestion (AD) microbiomes. Therefore, Petrimonas mucosa ING2-E5AT was isolated from a biogas reactor sample and sequenced on the PacBio RSII and Illumina MiSeq sequencers. Phylogenetic classification positioned the strain ING2-E5AT in close proximity to Fermentimonas and Proteiniphilum species (family Dysgonomonadaceae). ING2-E5AT encodes a number of genes for glycosyl-hydrolyses (GH) which are organized in Polysaccharide Utilization Loci (PUL) comprising tandem susCD-like genes for a TonB-dependent outer-membrane transporter and a cell surface glycan-binding protein. Different GHs encoded in PUL are involved in pectin degradation, reflecting a pronounced specialization of the ING2-E5AT PUL systems regarding the decomposition of this polysaccharide. Genes encoding enzymes participating in amino acids fermentation were also identified. Fragment recruitments with the ING2-E5AT genome as a template and publicly available metagenomes of AD microbiomes revealed that Petrimonas species are present in 146 out of 257 datasets supporting their importance in AD microbiomes. Metatranscriptome analyses of AD microbiomes uncovered active sugar and amino acid fermentation pathways for Petrimonas species. Likewise, screening of metaproteome datasets demonstrated expression of the Petrimonas PUL-specific component SusC providing further evidence that PUL play a central role for the lifestyle of Petrimonas species.
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Affiliation(s)
- Irena Maus
- Center for Biotechnology (CeBiTec), Genome Research of Industrial Microorganisms, Bielefeld University, Universitätsstr. 27, 33615 Bielefeld, Germany; (I.M.); (D.W.); (J.H.); (A.P.)
| | - Tom Tubbesing
- Faculty of Technology, Bielefeld University, Universitätsstr. 25, 33615 Bielefeld, Germany; (T.T.); (L.H.); (A.S.)
| | - Daniel Wibberg
- Center for Biotechnology (CeBiTec), Genome Research of Industrial Microorganisms, Bielefeld University, Universitätsstr. 27, 33615 Bielefeld, Germany; (I.M.); (D.W.); (J.H.); (A.P.)
| | - Robert Heyer
- Bioprocess Engineering, Otto von Guericke University Magdeburg, Universitätspl. 2, 39106 Magdeburg, Germany; (R.H.); (D.B.)
- Database and Software Engineering Group, Department of Computer Science, Institute for Technical and Business Information Systems, Otto von Guericke University Magdeburg, Universitätspl. 2, 39106 Magdeburg, Germany
| | - Julia Hassa
- Center for Biotechnology (CeBiTec), Genome Research of Industrial Microorganisms, Bielefeld University, Universitätsstr. 27, 33615 Bielefeld, Germany; (I.M.); (D.W.); (J.H.); (A.P.)
- Department of Bioengineering, Leibniz Institute for Agricultural Engineering and Bioeconomy, Max-Eyth-Allee 100, 14469 Potsdam, Germany
| | - Geizecler Tomazetto
- Biological and Chemical Engineering Section (BCE), Department of Engineering, Aarhus University, 8000 Aarhus, Denmark;
| | - Liren Huang
- Faculty of Technology, Bielefeld University, Universitätsstr. 25, 33615 Bielefeld, Germany; (T.T.); (L.H.); (A.S.)
| | - Boyke Bunk
- Department Bioinformatics and Databases, Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures GmbH, Inhoffenstraße 7B, 38124 Braunschweig, Germany; (B.B.); (C.S.)
| | - Cathrin Spröer
- Department Bioinformatics and Databases, Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures GmbH, Inhoffenstraße 7B, 38124 Braunschweig, Germany; (B.B.); (C.S.)
| | - Dirk Benndorf
- Bioprocess Engineering, Otto von Guericke University Magdeburg, Universitätspl. 2, 39106 Magdeburg, Germany; (R.H.); (D.B.)
- Bioprocess Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Sandtorstr. 1, 39106 Magdeburg, Germany
- Microbiology, Anhalt University of Applied Sciences, Bernburger Straße 55, 06354 Köthen, Germany
| | - Vladimir Zverlov
- Chair of Microbiology, Technical University of Munich, Emil-Ramann-Str. 4, 85354 Freising, Germany;
- Institute of Molecular Genetics, National Research Centre «Kurchatov Institute», Kurchatov Sq. 2, 123128 Moscow, Russia
| | - Alfred Pühler
- Center for Biotechnology (CeBiTec), Genome Research of Industrial Microorganisms, Bielefeld University, Universitätsstr. 27, 33615 Bielefeld, Germany; (I.M.); (D.W.); (J.H.); (A.P.)
| | - Michael Klocke
- Institute of Agricultural and Urban Ecological Projects Affiliated to Berlin Humboldt University (IASP), Philippstraße 13, 10115 Berlin, Germany;
| | - Alexander Sczyrba
- Faculty of Technology, Bielefeld University, Universitätsstr. 25, 33615 Bielefeld, Germany; (T.T.); (L.H.); (A.S.)
| | - Andreas Schlüter
- Center for Biotechnology (CeBiTec), Genome Research of Industrial Microorganisms, Bielefeld University, Universitätsstr. 27, 33615 Bielefeld, Germany; (I.M.); (D.W.); (J.H.); (A.P.)
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Castro YA, Agblevor FA. Interaction effect of high feed to inoculum ratio (F/I) and temperature on the biomethanation kinetics of water hyacinth. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-03626-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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29
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Microbial Communities and Sulfate-Reducing Microorganisms Abundance and Diversity in Municipal Anaerobic Sewage Sludge Digesters from a Wastewater Treatment Plant (Marrakech, Morocco). Processes (Basel) 2020. [DOI: 10.3390/pr8101284] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Both molecular analyses and culture-dependent isolation were combined to investigate the diversity of sulfate-reducing prokaryotes and explore their role in sulfides production in full-scale anaerobic digesters (Marrakech, Morocco). At global scale, using 16S rRNA gene sequencing, Proteobacteria, Bacteroidetes, Firmicutes, Actinobacteria, Synergistetes, and Euryarchaeota were the most dominant phyla. The abundance of Archaea (3.1–5.7%) was linked with temperature. The mcrA gene ranged from 2.18 × 105 to 1.47 × 107 gene copies.g−1 of sludge. The sulfate-reducing prokaryotes, representing 5% of total sequences, involved in sulfides production were Peptococcaceae, Syntrophaceae, Desulfobulbaceae, Desulfovibrionaceae, Syntrophobacteraceae, Desulfurellaceae, and Desulfobacteraceae. Furthermore, dsrB gene ranged from 2.18 × 105 to 1.92 × 107 gene copies.g−1 of sludge. The results revealed that exploration of diversity and function of sulfate-reducing bacteria may play a key role in decreasing sulfide production, an undesirable by-product, during anaerobic digestion.
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30
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Lim EY, Tian H, Chen Y, Ni K, Zhang J, Tong YW. Methanogenic pathway and microbial succession during start-up and stabilization of thermophilic food waste anaerobic digestion with biochar. BIORESOURCE TECHNOLOGY 2020; 314:123751. [PMID: 32619808 DOI: 10.1016/j.biortech.2020.123751] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 06/24/2020] [Accepted: 06/25/2020] [Indexed: 05/22/2023]
Abstract
One of the major obstacles for thermophilic anaerobic digestion is the process instability during start-up. This study proposed the use of a cost-effective additive, biochar, to accelerate and stabilize the start-up of thermophilic semi-continuous food waste anaerobic digestion. The results showed that the reactors with biochar addition resulted in up to 18% higher methane yield as compared to the control reactors (without biochar). The key microbial networks were elucidated through thermochemical and microbial analysis. Particularly, the addition of biochar promoted the growth of electroactive Clostridia and other electroactive bacteria, while the absence of biochar promoted the growth of homoacetogenic Clostridia and syntrophic acetate oxidizing bacteria. It was revealed that biochar promoted direct interspecies electron transfer between the microbes and was responsible for the faster degradation of volatile fatty acids. Furthermore, reactors with biochar also enhanced the thermodynamically favourable acetoclastic methanogenic pathway due to the higher abundance of Methanosarcina.
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Affiliation(s)
- Ee Yang Lim
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, S117576 Singapore, Singapore
| | - Hailin Tian
- NUS Environment Research Institute, National University of Singapore, 5A Engineering Drive 1, Singapore 117411, Singapore
| | - Yangyang Chen
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Canada
| | - Kewei Ni
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Canada
| | - Jingxin Zhang
- China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai 201306, China
| | - Yen Wah Tong
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, S117576 Singapore, Singapore; NUS Environment Research Institute, National University of Singapore, 5A Engineering Drive 1, Singapore 117411, Singapore.
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31
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Lyu C, Hua L, Shi Q, Zhang Z, Xin X, Chen F, Yu X, Xu Z, Bai Z, Wang E. Identification of key bacterial populations affecting early embryonic development in cattle uterus. Anim Sci J 2020; 91:e13374. [PMID: 32378282 DOI: 10.1111/asj.13374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 02/21/2020] [Accepted: 03/15/2020] [Indexed: 11/30/2022]
Abstract
Superovulation is an important animal breeding biotechnology, while the quality of embryos obtained from superovulation is unstable in cattle. The relationship between the microorganisms in the cattle uterus and embryo qualities was determined to identify the key bacterial populations affecting early embryonic development. A total of 10 Xia Nan cows underwent superovulation, we collected cervical mucus and flush samples to investigated by 16S rDNA sequencing. Results showed that there were abundant microorganisms in cervical mucus, but no obvious relationship with the quality of embryos. The clustering results of flush samples were consistent with the grouping of embryo quality. Proteobacteria accounted for more than 95% of the total bacterial community in group A with the best embryo quality (qualified embryo ratio above 0.8), and as embryo quality decreased, the Proteobacteria proportion also decreased. In contrast to the proportion of Proteobacteria, the proportions of Firmicutes and Bacteroidetes significantly increased as embryo quality decreased. For group C with the worst embryo quality, the proportions of Firmicutes and Bacteroidetes increased to 4.7 times and 12.3 times of group A, respectively. These results showed that the quantities and proportions of Firmicutes and Bacteroidetes may be related to early embryonic development in cattle.
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Affiliation(s)
- Chenchen Lyu
- Henan Key Laboratory of Farm Animal Breeding and Nutritional Regulation, Institute of Animal Husbandry and Veterinary Science, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Liushuai Hua
- Henan Key Laboratory of Farm Animal Breeding and Nutritional Regulation, Institute of Animal Husbandry and Veterinary Science, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Qiaoting Shi
- Henan Key Laboratory of Farm Animal Breeding and Nutritional Regulation, Institute of Animal Husbandry and Veterinary Science, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Zijing Zhang
- Henan Key Laboratory of Farm Animal Breeding and Nutritional Regulation, Institute of Animal Husbandry and Veterinary Science, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Xiaoling Xin
- Henan Key Laboratory of Farm Animal Breeding and Nutritional Regulation, Institute of Animal Husbandry and Veterinary Science, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Fuying Chen
- Henan Key Laboratory of Farm Animal Breeding and Nutritional Regulation, Institute of Animal Husbandry and Veterinary Science, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Xiangdong Yu
- Henan Key Laboratory of Farm Animal Breeding and Nutritional Regulation, Institute of Animal Husbandry and Veterinary Science, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Zhaoxue Xu
- Henan Key Laboratory of Farm Animal Breeding and Nutritional Regulation, Institute of Animal Husbandry and Veterinary Science, Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Zhonglin Bai
- Biyang Center for Animal Disease Control and Prevention, Biyang, China
| | - Eryao Wang
- Henan Key Laboratory of Farm Animal Breeding and Nutritional Regulation, Institute of Animal Husbandry and Veterinary Science, Henan Academy of Agricultural Sciences, Zhengzhou, China
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Al-Wahaibi A, Osman AI, Al-Muhtaseb AH, Alqaisi O, Baawain M, Fawzy S, Rooney DW. Techno-economic evaluation of biogas production from food waste via anaerobic digestion. Sci Rep 2020; 10:15719. [PMID: 32973335 PMCID: PMC7515879 DOI: 10.1038/s41598-020-72897-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 09/07/2020] [Indexed: 01/20/2023] Open
Abstract
Food waste is a major constituent in municipal solid wastes and its accumulation or disposal of in landfills is problematic, causing environmental issues. Herein, a techno-economic study is carried out on the potential of biogas production from different types of food waste generated locally. The biogas production tests were at two-time sets; 24-h and 21-day intervals and results showed a good correlation between those two-time sets. Thus, we propose to use the 24-h time set to evaluate feedstock fermentation capacity that is intended for longer periods. Our approach could potentially be applied within industry as the 24-h test can give a good indication of the potential substrate gas production as a quick test that saves time, with minimal effort required. Furthermore, polynomial models were used to predict the production of total gas and methane during the fermentation periods, which showed good matching between the theoretical and practical values with a coefficient of determination R2 = 0.99. At day 21, the accumulative gas production value from mixed food waste samples was 1550 mL per 1 g of dry matter. An economic evaluation was conducted and showed that the case study breaks-even at $0.2944 per cubic metre. Any prices above this rate yield a positive net present value (NPV); at $0.39/m3 a discounted payback period of six years and a positive NPV of $3108 were calculated. If waste management fee savings are to be incorporated, the total savings would be higher, increasing annual cash flows and enhancing financial results. This economic evaluation serves as a preliminary guide to assess the economic feasibility based on the fluctuating value of methane when producing biogas from food waste via anaerobic digestion, thus could help biogas project developers investigate similar scale scenarios .
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Affiliation(s)
- Abeer Al-Wahaibi
- Department of Petroleum and Chemical Engineering, College of Engineering, Sultan Qaboos University, Muscat, Oman
| | - Ahmed I Osman
- School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast, BT9 5AG, Northern Ireland, UK.
| | - Ala'a H Al-Muhtaseb
- Department of Petroleum and Chemical Engineering, College of Engineering, Sultan Qaboos University, Muscat, Oman.
| | - Othman Alqaisi
- Department of Animal and Veterinary Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Muscat, Oman
| | - Mahad Baawain
- International Maritime College Oman, Sohar, Muscat, Oman
| | - Samer Fawzy
- School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast, BT9 5AG, Northern Ireland, UK
| | - David W Rooney
- School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast, BT9 5AG, Northern Ireland, UK
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Sekoai PT, Engelbrecht N, du Preez SP, Bessarabov D. Thermophilic Biogas Upgrading via ex Situ Addition of H 2 and CO 2 Using Codigested Feedstocks of Cow Manure and the Organic Fraction of Solid Municipal Waste. ACS OMEGA 2020; 5:17367-17376. [PMID: 32715221 PMCID: PMC7377068 DOI: 10.1021/acsomega.0c01725] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 06/18/2020] [Indexed: 06/11/2023]
Abstract
Bioconversion of renewable H2 and waste CO2 using methanogenic archaea is a promising technology for obtaining high-purity CH4, which can serve as an alternative for natural gas. This process is known as ex situ biogas upgrading. This work highlights the pathway toward the bioconversion of renewable H2 and CO2 into high-purity biomethane by exploiting highly accessible agro-municipal residues: cow manure (CM) and the organic fraction of solid municipal waste (OFSMW), which used to be called "waste materials". More specifically, an ex situ thermophilic (55 °C) biogas upgrading process was conducted by CM and OFSMW codigestion at different mass proportions: 100:0, 80:20, 70:30, 60:40, and 50:50. Maximum CH4 concentrations of 92-97 vol % and biogas volumetric production rates of 4954-6605 NmL/L.d were obtained from a batch reactor of 3 L working volume. Feedstock characterization, pH monitoring, and the carbon-to-nitrogen ratio were critical parameters to evaluate during biogas upgrading experiments. In this work, the usefulness of agro-municipal substrates is highlighted by producing high-purity biomethane-an energetic chemical to facilitate renewable energy conversion, which supports various end-use applications. This process therefore provides a solution to renewable energy storage challenges and future sustainable and green energy supply.
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Giongo A, Granada CE, Borges LGA, Pereira LM, Trindade FJ, Mattiello SP, Oliveira RR, Shubeita FM, Lovato A, Marcon C, Medina-Silva R. Microbial communities in anaerobic digesters change over time and sampling depth. Braz J Microbiol 2020; 51:1177-1190. [PMID: 32394239 DOI: 10.1007/s42770-020-00272-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 04/09/2020] [Indexed: 10/24/2022] Open
Abstract
Anaerobic digestion (AD) is a process resulting from the anaerobic metabolism of specific microorganisms that produce an eco-friendly type of energy and a stabilized soil fertilizer. We described the microbial communities and their changes in three depths of BioKöhler® biodigester, fed with cattle manure for 18 days, under anaerobic incubation at the psychrophilic temperature range (~ 20 °C). During the experiment, the maximum methane content in the raw biogas was 79.9%. Non-metric multidimensional scaling (MDS) showed significant differences among microbial communities in the bottom, medium, and upper depths. Considering all the periods of incubation, the microbial communities changed until the eighth day, and they remained stable from eighth to seventeenth days. Bacteroidetes, Firmicutes, and Synergistetes were the most abundant phyla in samples, representing approximately 41% of the total OTUs. The relative abundance of the phyla Euryarchaeota, Actinobacteria, Firmicutes, and Verrucomicrobia changed from bottom to medium sampling points. Moreover, Crenarchaeota differed in frequencies from medium to upper, and Acidobacteria from bottom to upper samples. Lentisphaerae, Chloroflexi, and LD1 were different solely at the bottom, whereas OP9 and Tenericutes only in the medium. Psychrophilic AD performed in this work removed pathogens like Salmonella and Escherichia, as observed at the digestate analyzed. This type of treatment of raw manure besides producing eco-friendly energy efficiently also generates a stabilized and safe biomass that can be used as fertilizer in soils.
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Affiliation(s)
- Adriana Giongo
- Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Instituto do Petróleo e dos Recursos Naturais, Porto Alegre, RS, Brazil
| | - Camille E Granada
- Programa de Pós-graduação em Biotecnologia, Universidade do Vale do Taquari (UNIVATES), Rua Avelino Tallini, 171, Lajeado, RS, Brazil.
| | - Luiz G A Borges
- Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Instituto do Petróleo e dos Recursos Naturais, Porto Alegre, RS, Brazil
| | - Leandro M Pereira
- Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Escola de Ciências da Saúde da Vida, Porto Alegre, RS, Brazil
| | - Fernanda J Trindade
- Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Escola de Ciências da Saúde da Vida, Porto Alegre, RS, Brazil
| | - Shaiana P Mattiello
- Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Instituto do Petróleo e dos Recursos Naturais, Porto Alegre, RS, Brazil.,Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Escola de Ciências da Saúde da Vida, Porto Alegre, RS, Brazil
| | - Rafael R Oliveira
- Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Instituto do Petróleo e dos Recursos Naturais, Porto Alegre, RS, Brazil
| | - Fauzi M Shubeita
- Sociedade Educacional Três de Maio (SETREM), Três de Maio, RS, Brazil.,Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Escola Politécnica, Porto Alegre, RS, Brazil
| | | | - César Marcon
- Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Escola Politécnica, Porto Alegre, RS, Brazil
| | - Renata Medina-Silva
- Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Instituto do Petróleo e dos Recursos Naturais, Porto Alegre, RS, Brazil.,Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Escola de Ciências da Saúde da Vida, Porto Alegre, RS, Brazil
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35
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Influences of Temperature and Substrate Particle Content on Granular Sludge Bed Anaerobic Digestion. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app10010136] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Influences of temperature (25–35 °C) and substrate particulate content (3.0–9.4 g total suspended solids (TSS)/L) on granular sludge bed anaerobic digestion (AD) were analyzed in lab-scale reactors using manure as a substrate and through modeling. Two particle levels were tested using raw (RF) and centrifuged (CF) swine manure slurries, fed into a 1.3-L lab-scale up-flow anaerobic sludge bed reactor (UASB) at temperatures of 25 °C and 35 °C. Biogas production increased with temperature in both high- and low-particle-content substrates; however, the temperature effect was stronger on high-particle-content substrate. RF and CF produced a comparable amount of biogas at 25 °C, suggesting that biogas at this temperature came mainly from the digestion of small particles and soluble components present in similar quantities in both substrates. At 35 °C, RF showed significantly higher biogas production than CF, which was attributed to increased (temperature-dependent) disintegration of larger solid particulates. Anaerobic Digestion Model No.1 (ADM1) based modeling was carried out by separating particulates into fast and slow disintegrating fractions and introducing temperature-dependent disintegration constants. Simulations gave a better fit for the experimental data than the conventional ADM1 model.
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36
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Prem EM, Markt R, Lackner N, Illmer P, Wagner AO. Microbial and Phenyl Acid Dynamics during the Start-up Phase of Anaerobic Straw Degradation in Meso- and Thermophilic Batch Reactors. Microorganisms 2019; 7:E657. [PMID: 31817383 PMCID: PMC6956005 DOI: 10.3390/microorganisms7120657] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 11/20/2019] [Accepted: 12/03/2019] [Indexed: 12/22/2022] Open
Abstract
Aromatic compounds like phenyl acids derived from lignocellulose degradation have been suspected to negatively influence biogas production processes. However, results on this topic are still inconclusive. To study phenyl acid formation in batch reactors during the start-up phase of anaerobic degradation, different amounts of straw from grain were mixed with mesophilic and thermophilic sludge, respectively. Molecular biological parameters were assessed using next-generation sequencing and qPCR analyses. Metagenomic predictions were done via the program, piphillin. Methane production, concentrations of phenylacetate, phenylpropionate, phenylbutyrate, and volatile fatty acids were monitored chromatographically. Methanosarcina spp. was the dominant methanogen when high straw loads were effectively degraded, and thus confirmed its robustness towards overload conditions. Several microorganisms correlated negatively with phenyl acids; however, a negative effect, specifically on methanogens, could not be proven. A cascade-like increase/decrease from phenylacetate to phenylpropionate, and then to phenylbutyrate could be observed when methanogenesis was highly active. Due to these results, phenylacetate was shown to be an early sign for overload conditions, whereas an increase in phenylbutyrate possibly indicated a switch from degradation of easily available to more complex substrates. These dynamics during the start-up phase might be relevant for biogas plant operators using complex organic wastes for energy exploitation.
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Affiliation(s)
- Eva Maria Prem
- Department of Microbiology, Universität Innsbruck, A-6020 Innsbruck, Austria; (R.M.); (N.L.); (P.I.); (A.O.W.)
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37
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Breunig HM, Amirebrahimi J, Smith S, Scown CD. Role of Digestate and Biochar in Carbon-Negative Bioenergy. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:12989-12998. [PMID: 31626735 DOI: 10.1021/acs.est.9b03763] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Digestate and biochar can be land applied to sequester carbon and improve net primary productivity, but the achievable scale is tied to expected growth in bioenergy production and land available for application. We use an attributional life-cycle assessment approach to estimate the greenhouse gas (GHG) emissions and carbon storage potential of biochar, digested solids, and composted digested solids generated from organic waste in California as a test case. Our scenarios characterize changes in organic waste production, bioenergy facility build-out, bioenergy byproduct quality, and soil response. Moderate to upper bound growth in the bioenergy sector with annual byproduct disposal over 100 years could provide a cumulative GHG offset of 50-400 MMTCO2 equiv, with an additional 80-300 MMTC sequestered in soils. This corresponds to net GHG mitigation over 100 years equivalent to 340-1500 MMTCO2 equiv (80-350% of California's annual emissions). In most scenarios, there is sufficient working land to apply all available biochar and digestate, although land becomes a constraint if the soil's rest time between applications increases from 5 to 15 years.
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Affiliation(s)
- Hanna M Breunig
- Energy Technologies Area , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - Jahon Amirebrahimi
- Energy Technologies Area , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
- Goldman School of Public Policy , University of California , Berkeley , California 94720 , United States
| | - Sarah Smith
- Energy Technologies Area , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
- Civil and Environmental Engineering , University of California , Berkeley , California 94720 , United States
| | - Corinne D Scown
- Energy Technologies Area , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
- Joint BioEnergy Institute , Emeryville , California 94608 , United States
- Energy & Biosciences Institute , University of California , Berkeley , California 94720 , United States
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38
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Fernandez‐Gonzalez N, Pedizzi C, Lema JM, Carballa M. Air-side ammonia stripping coupled to anaerobic digestion indirectly impacts anaerobic microbiome. Microb Biotechnol 2019; 12:1403-1416. [PMID: 31532080 PMCID: PMC6801131 DOI: 10.1111/1751-7915.13482] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 06/26/2019] [Accepted: 08/13/2019] [Indexed: 11/29/2022] Open
Abstract
Air-side stripping without a prior solid-liquid phase separation step is a feasible and promising process to control ammonia concentration in thermophilic digesters. During the process, part of the anaerobic biomass is exposed to high temperature, high pH and aerobic conditions. However, there are no studies assessing the effects of those harsh conditions on the microbial communities of thermophilic digesters. To fill this knowledge gap, the microbiomes of two thermophilic digesters (55°C), fed with a mixture of pig manure and nitrogen-rich co-substrates, were investigated under different organic loading rates (OLR: 1.1-5.2 g COD l-1 day-1 ), ammonia concentrations (0.2-1.5 g free ammonia nitrogen l-1 ) and stripping frequencies (3-5 times per week). The bacterial communities were dominated by Firmicutes and Bacteroidetes phyla, while the predominant methanogens were Methanosarcina sp archaea. Increasing co-substrate fraction, OLR and free ammonia nitrogen (FAN) favoured the presence of genera Ruminiclostridium, Clostridium and Tepidimicrobium and of hydrogenotrophic methanogens, mainly Methanoculleus archaea. The data indicated that the use of air-side stripping did not adversely affect thermophilic microbial communities, but indirectly modulated them by controlling FAN concentrations in the digester. These results demonstrate the viability at microbial community level of air side-stream stripping process as an adequate technology for the ammonia control during anaerobic co-digestion of nitrogen-rich substrates.
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Affiliation(s)
- Nuria Fernandez‐Gonzalez
- Department of Chemical EngineeringUniversidade de Santiago de CompostelaRúa Lope Gómez de Marzoa, s/n.15782Santiago de CompostelaSpain
- Present address:
Present address:Department of Chemical Engineering and Environmental TechnologyValladolid UniversityDr. Mergelina, s/n47011ValladolidSpain
| | - Chiara Pedizzi
- Department of Chemical EngineeringUniversidade de Santiago de CompostelaRúa Lope Gómez de Marzoa, s/n.15782Santiago de CompostelaSpain
| | - Juan M. Lema
- Department of Chemical EngineeringUniversidade de Santiago de CompostelaRúa Lope Gómez de Marzoa, s/n.15782Santiago de CompostelaSpain
| | - Marta Carballa
- Department of Chemical EngineeringUniversidade de Santiago de CompostelaRúa Lope Gómez de Marzoa, s/n.15782Santiago de CompostelaSpain
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39
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Shin J, Jang HM, Shin SG, Kim YM. Thermophilic anaerobic digestion: Effect of start-up strategies on performance and microbial community. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 687:87-95. [PMID: 31203011 DOI: 10.1016/j.scitotenv.2019.05.428] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 05/03/2019] [Accepted: 05/28/2019] [Indexed: 06/09/2023]
Abstract
Effects of two different start-up methods were compared during conversion from mesophilic to thermophilic anaerobic digestion of sewage sludge. During the batch operation, a transient increase in both total bacterial concentration and relative abundance of thermophilic bacteria in R1 (a one-step increase method) resulted in 34% higher volatile solids (VS) removal efficiency by R1 compared to R2 (a step-wise increase method). Meanwhile, higher total archaeal concentration and increased relative abundance of thermophilic archaea in R2 were attributed to 65% higher methane production by R2 compared to R1. The same trends for VS removal and methane production were observed during the subsequent continuous mode, although the microbial composition of the two reactors became similar. These findings may prove helpful for determining the preferred start-up method for thermophilic anaerobic digestion: a one-step method can be proposed for higher VS removal efficiency, or a step-wise method can be selected for enhanced methane production.
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Affiliation(s)
- Jingyeong Shin
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Buk-gu, Gwangju 500-712, Republic of Korea
| | - Hyun Min Jang
- Department of Agricultural and Biological Engineering, Texas A&M AgriLife Research Center at Stephenville, Texas A&M University, USA
| | - Seung Gu Shin
- Department of Energy Engineering, Gyeongnam National University of Science and Technology, Jinju, Gyeongnam, Republic of Korea.
| | - Young Mo Kim
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Buk-gu, Gwangju 500-712, Republic of Korea.
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40
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Banach A, Ciesielski S, Bacza T, Pieczykolan M, Ziembińska-Buczyńska A. Microbial community composition and methanogens' biodiversity during a temperature shift in a methane fermentation chamber. ENVIRONMENTAL TECHNOLOGY 2019; 40:3252-3263. [PMID: 29683411 DOI: 10.1080/09593330.2018.1468490] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 04/17/2018] [Indexed: 06/08/2023]
Abstract
More information on the connection between anaerobic digestion (AD) parameters and composition of the microbial community involved in the AD process is required to gain a better understanding of how a bioreactor functions. The aim of this study was to analyse the composition of microbial communities and the dynamics of methanogens' biodiversity changes during the shift from mesophilic (38°C) to thermophilic (55°C) conditions during biogas production. The total microbial composition was examined via the metagenomic approach based on 16S rRNA gene sequencing, whereas the methanogen communities were analysed using PCR-DGGE (Polymerase Chain Reaction-Denaturing Gradient Gel Electrophoresis) of mcrA. Even though the temperature is one of the crucial parameters affecting microorganisms involved in the AD process, the results presented here revealed that there were no statistically significant differences in bacterial community composition between the mesophilic and thermophilic phases of the process. The most abundant phyla were found to be Proteobacteria, Firmicutes, Actinobacteria and Bacteroidetes. However, the methanogens' community genotypic structure as examined by the PCR-DGGE method changed under thermophilic conditions. The temperature had the strongest impact on the archaeal methanogens in the fermentation chamber directly after implementing the temperature shift. A relatively higher biogas yield and average content of CH4 in the produced biogas were observed under thermophilic conditions.
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Affiliation(s)
- Anna Banach
- Environmental Biotechnology Department, Faculty of Power and Environmental Engineering, The Silesian University of Technology , Gliwice , Poland
| | - Sławomir Ciesielski
- Department of Environmental Biotechnology, University of Warmia and Mazury in Olsztyn , Olsztyn , Poland
| | - Tomasz Bacza
- Environmental Biotechnology Department, Faculty of Power and Environmental Engineering, The Silesian University of Technology , Gliwice , Poland
| | - Marek Pieczykolan
- Regional Center for Water and Wastewater Management Co. , Tychy , Poland
| | - Aleksandra Ziembińska-Buczyńska
- Environmental Biotechnology Department, Faculty of Power and Environmental Engineering, The Silesian University of Technology , Gliwice , Poland
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41
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Buettner C, von Bergen M, Jehmlich N, Noll M. Pseudomonas spp. are key players in agricultural biogas substrate degradation. Sci Rep 2019; 9:12871. [PMID: 31492882 PMCID: PMC6731289 DOI: 10.1038/s41598-019-49313-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 08/20/2019] [Indexed: 12/11/2022] Open
Abstract
Anaerobic degradation (AD) of heterogeneous agricultural substrates is a complex process involving a diverse microbial community. While microbial community composition of a variety of biogas plants (BPs) is well described, little is known about metabolic processes and microbial interaction patterns. Here, we analyzed 16 large-scale BPs using metaproteomics. All metabolic steps of AD were observed in the metaproteome, and multivariate analyses indicated that they were shaped by temperature, pH, volatile fatty acid content and substrate types. Biogas plants could be subdivided into hydrogenotrophic, acetoclastic or a mixture of both methanogenic pathways based on their process parameters, taxonomic and functional metaproteome. Network analyses showed large differences in metabolic and microbial interaction patterns. Both, number of interactions and interaction partners were highly dependent on the prevalent methanogenic pathway for most species. Nevertheless, we observed a highly conserved metabolism of different abundant Pseudomonas spp. for all BPs indicating a key role during AD in carbohydrate hydrolysis irrespectively of variabilities in substrate input and process parameters. Thus, Pseudomonas spp. are of high importance for robust and versatile AD food webs, which highlight a large variety of downstream metabolic processes for their respective methanogenic pathways.
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Affiliation(s)
- Christian Buettner
- Coburg University of Applied Sciences and Arts, Institute for Bioanalysis, Friedrich-Streib-Str. 2, 96450, Coburg, Germany
| | - Martin von Bergen
- Helmholtz-Centre for Environmental Research - UFZ GmbH, Department of Molecular Systems Biology, Permoserstraße 15, 04318, Leipzig, Germany.,University of Leipzig, Institute for Biochemistry, Brüderstraße 34, 04103, Leipzig, Germany
| | - Nico Jehmlich
- Helmholtz-Centre for Environmental Research - UFZ GmbH, Department of Molecular Systems Biology, Permoserstraße 15, 04318, Leipzig, Germany
| | - Matthias Noll
- Coburg University of Applied Sciences and Arts, Institute for Bioanalysis, Friedrich-Streib-Str. 2, 96450, Coburg, Germany.
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42
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Moset V, Wahid R, Ward A, Møller HB. Modelling methane emission mitigation by anaerobic digestion: effect of storage conditions and co-digestion. ENVIRONMENTAL TECHNOLOGY 2019; 40:2633-2642. [PMID: 29498588 DOI: 10.1080/09593330.2018.1447999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 02/28/2018] [Indexed: 06/08/2023]
Abstract
In this work the methane conversion factor (MCF) of untreated and anaerobically digested cattle manure (CM) as a function of storage temperature, time and co-digestion was measured in an in vitro experiment and modelled based on IPCC (2006) methodology (Tier 2). For this, one sample of untreated CM, one sample of mono-digested CM and three samples of CM co-digested with grass were incubated at seven different temperatures (from 5°C to 50°C) over 346 days. The main results showed that ultimate methane yield (B0) of CM is higher than the B0 reported by the IPCC (2006). Two temperature ranges should be considered for MCF evolution, below 15°C very low MCF was measured in this work for untreated CM, mono and co-digested samples. At higher temperatures, MCF obtained in this work and that provided by the IPCC could be comparable depending on storage time. Anaerobic mono-digestion decreased MCF compared to untreated CM at all temperatures and times, except in the temperature range between 20°C and 25°C if storage time is low, due to a lag phase observed in CM. This lag phase would probably not happen in real storage conditions depending on the proportion of old manure remaining in the storage tank. Co-digestion with grass-decreased MCF compared to mono-digestion, but increased CH4 production in terms of fresh matter due to the higher B0 of the mixture. Storage time, temperature and co-digestion should be considered in the quantification of CH4 emission from digested material.
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Affiliation(s)
- Veronica Moset
- a Department of Engineering, Aarhus University , Aarhus , Denmark
| | - R Wahid
- a Department of Engineering, Aarhus University , Aarhus , Denmark
| | - A Ward
- a Department of Engineering, Aarhus University , Aarhus , Denmark
| | - H B Møller
- a Department of Engineering, Aarhus University , Aarhus , Denmark
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43
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Microbial Profile of the Leachate from Mexico City’s Bordo Poniente Composting Plant: An Inoculum to Digest Organic Waste. ENERGIES 2019. [DOI: 10.3390/en12122343] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In recent years, municipal solid waste (MSW) management has become a complex problem worldwide. Similarly, Mexico City is facing such a situation for the management and treatment of organic fraction of municipal solid waste (OFMSW). Therefore, in this work, we investigated whether leachate from the composting plant, Bordo Poniente, located in Mexico City can be used as an inoculum for the treatment of OFMSW using thermophilic anaerobic digestion (AD) with a hydraulic retention time of 30 days. We analyzed the physicochemical properties of the leachate and performed a biochemical methane potential test. Archaeal and bacterial diversity was also identified using high throughput DNA sequencing of 16S rDNA libraries. Methane yield was 0.29 m3 CH4/kg VSadded in the positive control and 0.16 m3 CH4/kg VSadded in the treatment group. The phylum, Bacteroidetes, and genus, Methanosarcina, prevailed in the leachate. However, in thermophilic conditions, the microbial communities changed, and the phylum, Firmicutes, genera, Methanoculleus, and candidate genus, vadinCA11, were dominant in the treatment group. We concluded that the leachate contains a suitable initial charge of many active bacteria and methanogenic archaea which contribute to the AD process, hence it can be used as an inoculum for the treatment of OFMSW.
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Kong Z, Li L, Kato H, Zhang T, Xue Y, Li YY. Dissection and characterization of the prokaryotic community during the long-term operation of a submerged anaerobic membrane bioreactor for the anaerobic treatment of N, N-dimethylformamide-containing wastewater with a co-cultured inoculum. BIORESOURCE TECHNOLOGY 2019; 282:482-493. [PMID: 30897486 DOI: 10.1016/j.biortech.2019.03.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 03/01/2019] [Accepted: 03/04/2019] [Indexed: 06/09/2023]
Abstract
A submerged anaerobic membrane bioreactor (SAnMBR) was operated for the anaerobic treatment of wastewater containing approximately 2000 mg L-1N, N-dimethylformamide (DMF). Inoculated with a co-cultured inoculum, the SAnMBR obtained an excellent DMF removal under a low organic loading rate (OLR) of 3.14-4.16 g COD L-1 d-1. However, the elevation of OLR limited hydrolysis. While the co-cultured inoculum initially contains abundant DMF-hydrolyzing bacteria with potential to hydrolyze DMF into intermediates, such as Paracoccus, Hyphomicrobium, Burkholderia, Catellibacterium, Bacillus and Bradyrhizobium, since these bacteria are facultative anaerobes which survive anaerobically, they kept decaying rather than proliferating, resulting in the weakening of the DMF-hydrolyzing ability. Each re-inoculation of new sludge only temporarily revitalized hydrolysis activity for a short period. Due to the lack of nitrate, these bacteria were unable to proliferate. This suggests that a small dose of nitrate would help to enrich these bacteria and establish a stable DMF-degrading consortium.
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Affiliation(s)
- Zhe Kong
- Laboratory of Environmental Protection Engineering, Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba Ward, Sendai, Miyagi 980-8579, Japan
| | - Lu Li
- Laboratory of Environmental Protection Engineering, Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba Ward, Sendai, Miyagi 980-8579, Japan
| | - Hiroyuki Kato
- The Japan Institute of Wastewater Engineering and Technology, Suido-Cho Bld 7F, 3-1 Suido-Cho, Shinjuku Ward, Tokyo 162-0811, Japan
| | - Tao Zhang
- Laboratory of Environmental Protection Engineering, Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba Ward, Sendai, Miyagi 980-8579, Japan
| | - Yi Xue
- Graduate School of Environmental Studies, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba Ward, Sendai, Miyagi 980-8579, Japan
| | - Yu-You Li
- Laboratory of Environmental Protection Engineering, Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba Ward, Sendai, Miyagi 980-8579, Japan; Graduate School of Environmental Studies, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba Ward, Sendai, Miyagi 980-8579, Japan.
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Pore SD, Engineer A, Dagar SS, Dhakephalkar PK. Meta-omics based analyses of microbiome involved in biomethanation of rice straw in a thermophilic anaerobic bioreactor under optimized conditions. BIORESOURCE TECHNOLOGY 2019; 279:25-33. [PMID: 30710817 DOI: 10.1016/j.biortech.2019.01.099] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/21/2019] [Accepted: 01/22/2019] [Indexed: 06/09/2023]
Abstract
Biomethanation of rice straw was performed at 55 °C without thermochemical pretreatment using cattle dung supplemented with Methanothermobacter thermautotrophicus strains. Methane yield of 323 ml g-1 VS obtained under optimized conditions such as particle size (1 mm), carbon to nitrogen ratio (15:1), substrate to inoculum ratio (1:1), organic loading rate (7.5% w/v) and hydraulic retention time (20 days), was one of the highest ever reported from rice straw. Metagenome analysis revealed several putative novel taxa among resident microbes. The genomes of Clostridium, Hungateiclostridium, Alkaliphilus, Anaerocolumna, Olsenella, Paenibacillus, Pseudoclostridium, Tepidanaerobacter and Turicibacter were recovered as metagenome assisted genomes. Clostridium spp. and M. thermautotrophicus were the dominant hydrolytic and methanogenic microbes, respectively. Syntrophic acetate oxidation coupled to hydrogenotrophic methanogenesis was found to be the major pathway for methane production. Efficient thermophilic biomethanation of rice straw without thermochemical pretreatment using cattle dung supplemented with M. thermautotrophicus is reported for the first time.
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Affiliation(s)
- Soham D Pore
- Bioenergy Group, MACS Agharkar Research Institute, Pune 411004, Maharashtra, India; Savitribai Phule Pune University, Pune 411007, India
| | - Anupama Engineer
- Bioenergy Group, MACS Agharkar Research Institute, Pune 411004, Maharashtra, India
| | - Sumit Singh Dagar
- Bioenergy Group, MACS Agharkar Research Institute, Pune 411004, Maharashtra, India; Savitribai Phule Pune University, Pune 411007, India
| | - Prashant K Dhakephalkar
- Bioenergy Group, MACS Agharkar Research Institute, Pune 411004, Maharashtra, India; Savitribai Phule Pune University, Pune 411007, India.
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Higher Temperatures Do Not Always Achieve Better Antibiotic Resistance Gene Removal in Anaerobic Digestion of Swine Manure. Appl Environ Microbiol 2019; 85:AEM.02878-18. [PMID: 30683745 DOI: 10.1128/aem.02878-18] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 01/15/2019] [Indexed: 11/20/2022] Open
Abstract
This study employed high-throughput quantitative PCR and 16S rRNA sequencing to evaluate the effect of temperature and residual antibiotics on the dynamics of antibiotic resistance genes (ARGs) and microbial communities during anaerobic digestion of swine manure. The abundances of total ARGs and 16S rRNA genes significantly decreased in all of four treatments (25°C, 37°C, and 37°C with 50 mg of wet weight antibiotics of body weight, and 55°C). The abundances of most ARG types were significantly correlated with those of the 16S rRNA gene and transposase gene (P < 0.01). However, the abundances of total ARGs at 55°C were much higher than those of other treatments. Meanwhile, the microbial communities at 55°C, where the Streptococcus pathogen remained at a relatively high abundance and cellulose degraders and hydrogen producers, such as Ethanoligenens and Coprococcus bacteria, increased, were markedly different from those of other treatments. Redundancy analysis indicates that temperature, pH, and the genus Streptococcus had the highest explanation for ARG variation among experimental factors, chemical properties, and representative genera, respectively. Network analysis further showed that the genus Streptococcus contributed greatly to the higher ARG abundance at 55°C. The moderate antibiotic residue only caused a slight and transitory inhibition for microbially diverse populations and promotion for ARG abundance, probably due to the degradation of antibiotics and microbial adaptability. Our results clarify the cooperativity of gene transfer-related items on ARG variation and intensively prove that higher temperature cannot always achieve better ARG removal in anaerobic digestion unless pathogens and gene transfer elements are more efficiently inhibited.IMPORTANCE Antibiotic resistance genes (ARGs) are frequently detected with high abundance in manure-applied soils. Anaerobic digestion is one of widely used processes for animal waste treatment. Thus, it is critical to understand the potential of anaerobic digestion to attenuate ARGs. Although some previous studies recommended thermophilic digestion for ARG removal, they did not get sufficient evidence to support this view. The antibiotics applied to animals are mostly excreted through feces and urine because of incomplete metabolism. It is indispensable to know whether residual antibiotics in manure will hinder ARG attenuation in anaerobic digesters. The significance of our research is in comprehensively understanding the evolution and mechanism of ARGs in anaerobic digestion of swine manure affected by temperature and residual antibiotics, which will allow the development of an ARG elimination strategy before their release into the environment.
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Performance and Microbial Community Dynamics in Anaerobic Digestion of Waste Activated Sludge: Impact of Immigration. ENERGIES 2019. [DOI: 10.3390/en12030573] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Waste activated sludge (WAS) is a byproduct of municipal wastewater treatment. WAS contains a large proportion of inactive microbes, so when it is used as a substrate for anaerobic digestion (AD), their presence can interfere with monitoring of active microbial populations. To investigate how influent cells affect the active and inactive microbial communities during digestion of WAS, we operated model mesophilic bioreactors with conventional conditions. Under six different hydraulic retention times (HRTs; 25, 23, 20, 17, 14, and 11.5 d), the chemical oxygen demand (COD) removal and CH4 production of the AD were within a typical range for mesophilic sludge digesters. In the main bacteria were proteobacteria, bacteroidetes, and firmicutes in both the WAS and the bioreactors, while in main archaeal methanogen group was Methanosarcinales in the WAS and methanomicrobiales in the bioreactors. Of the 106 genera identified, the estimated net growth rates were negative in 72 and positive in 34. The genera with negative growth included many aerobic taxa. The genera with positive growth rates included methanogens and syntrophs. In some taxa, the net growth rate could be positive or negative, depending on HRT, so their abundance was also affected by HRT. This study gives insights into the microbial dynamics of a conventional sludge anaerobic digester by distinguishing potentially active (growing) and inactive (non-growing, dormant) microbes and by correlating population dynamics with process parameters.
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Achmon Y, Claypool JT, Pace S, Simmons BA, Singer SW, Simmons CW. Assessment of biogas production and microbial ecology in a high solid anaerobic digestion of major California food processing residues. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2018.11.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Schimpf U, Schulz R. Industrial by-products from white-rot fungi production. Part II: Application in anaerobic digestion for enzymatic treatment of hay and straw. Process Biochem 2019. [DOI: 10.1016/j.procbio.2018.10.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Guo X, Kang K, Shang G, Yu X, Qiu L, Sun G. Influence of mesophilic and thermophilic conditions on the anaerobic digestion of food waste: Focus on the microbial activity and removal of long chain fatty acids. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2018; 36:1106-1112. [PMID: 30306837 DOI: 10.1177/0734242x18801195] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The mesophilic reactor (MR) exhibited advantages in biogas production and performance stability over thermophilic reactor (TR) during the long-term anaerobic digestion (AD) of food waste (FW) with stepwise organic loading rate elevating. It was interesting to explore the mechanism causing the divergences in performances between these two reactors. The microbial activity was compared on day 110 when TR began to deteriorate. The results show that MR had significantly higher specific acetoclastic methanogenic activities (SAMA) and specific propionate and butyrate oxidative activities (SPOA and SBOA) than TR. The SAMA, SPOA and SBOA in TR were only 50.3%, 18.6% and 46.4% of those values in MR, respectively. Remarkably, the specific hydrogenotrophic methanogenic activity of 15.5±2.1, 15.7±4.6 mmol CH4·L-1 original slurry·d-1 in MR and TR was comparative with insignificant difference, which indicates that the microbial activity in TR had been inhibited widely apart from the hydrogenotrophic methanogenesis. Additionally, many particles with the diameters of 1-2 mm were observed to form in MR and identified as complexes of calcium and long chain fatty acids (LCFAs). The formation of calcium crystallization might alleviate the inhibition of LCFAs during AD of FW, which further supports the better performance in MR than TR.
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Affiliation(s)
- Xiaohui Guo
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Kang Kang
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Gaoyuan Shang
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Xiunan Yu
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Ling Qiu
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
| | - Guotao Sun
- 1 College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, Shaanxi, People's Republic of China
- 2 The West Scientific Observing and Experimental Station of Rural Renewable Energy Exploitation and Utilization of the Ministry of Agriculture, Yangling, Shaanxi, People's Republic of China
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