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Iltchenco J, Smiderle MD, Gaio J, Magrini FE, Paesi S. Metataxonomic characterization of the microbial present in the anaerobic digestion of turkey litter waste with the addition of two inocula: allochthonous and commercial. Int Microbiol 2024:10.1007/s10123-024-00561-3. [PMID: 39039379 DOI: 10.1007/s10123-024-00561-3] [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: 05/27/2024] [Revised: 07/07/2024] [Accepted: 07/15/2024] [Indexed: 07/24/2024]
Abstract
Turkey litter waste is lignocellulosic waste that can be sustainably used as an energy source through anaerobic digestion (AD). The 16S ribosomal RNA technique helps to unravel microbial diversity and predominant metabolic pathways. The assays were performed in 600-mL-glass bottles with 400 mL volume, for 60 days at 37 °C. The study evaluated the physicochemical parameters, the composition of the microbiota, and the functional inference in AD of different concentrations of turkey litter (T) using two inocula: granular inoculum (S) and commercial inoculum (B). The highest accumulated methane production (633 mL CH4·L-1) was observed in the test containing 25.5 g VS·L-1 of turkey litter with the addition of the two inocula (T3BS). In tests without inoculum (T3) and with commercial inoculum (T3B), there was an accumulation of acids and consequent inhibition of methane production 239 mL CH4·L-1 and 389 mL CH4·L-1, respectively. Bacteroidota, Firmicutes, and Actinobacteria were the main phyla identified. The presence of archaea Methanobacterium, Methanocorpusculum, and Methanolinea highlighted the hydrogenotrophic metabolic pathway in T3BS. Functional prediction showed enzymes involved in three metabolic pathways in turkey litter biodigestion: acetotrophic, hydrogenotrophic, and methylotrophic methanogenesis. The predominant hydrogenotrophic pathway can be observed by analyzing the microbiota, archaea involved in this specific pathway, genes involved, and relative acid consumption for T3S and T3BS samples with higher methane production. Molecular tools help to understand the main groups of microorganisms and metabolic pathways involved in turkey litter AD, such as the use of different inocula, allowing the development of strategies for the sustainable disposal of turkey litter.
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Affiliation(s)
- Janaina Iltchenco
- Molecular Diagnostic Laboratory, University of Caxias do Sul, Biotechnology Institute, Caxias do Sul, RS, 95070-560, Brazil.
| | - Mariana Dalsoto Smiderle
- Molecular Diagnostic Laboratory, University of Caxias do Sul, Biotechnology Institute, Caxias do Sul, RS, 95070-560, Brazil
| | - Juliano Gaio
- Molecular Diagnostic Laboratory, University of Caxias do Sul, Biotechnology Institute, Caxias do Sul, RS, 95070-560, Brazil
| | - Flaviane Eva Magrini
- Molecular Diagnostic Laboratory, University of Caxias do Sul, Biotechnology Institute, Caxias do Sul, RS, 95070-560, Brazil
| | - Suelen Paesi
- Molecular Diagnostic Laboratory, University of Caxias do Sul, Biotechnology Institute, Caxias do Sul, RS, 95070-560, Brazil
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2
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Chen S, Yao F, Pi Z, He L, Luo K, Li X, Yang Q. Evaluating the role of salinity in enhanced biogas production from two-stage anaerobic digestion of food waste by zero-valent iron. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 351:119911. [PMID: 38150931 DOI: 10.1016/j.jenvman.2023.119911] [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: 09/11/2023] [Revised: 12/07/2023] [Accepted: 12/17/2023] [Indexed: 12/29/2023]
Abstract
Salts including NaCl are the most common food flavoring agents so they are often accumulated in food waste (FW) and have potential impact on anaerobic digestion (AD) of FW. In this study, the enhanced biogas production from two-stage anaerobic digestion (TSAD) of FW by microscale zero-valent iron (ZVI) under different salinity (3, 6, 9, and 15 g NaCl/L) was evaluated. Under salinity stress, ZVI becomes a continue-release electron donor due to the enhanced corrosion and dissolution effect and the slow-down surface passivation, further improving the performance of TSAD. Experimental results revealed that the biogas production including H2 and CH4 from TSAD with 10 g/L ZVI addition was promoted under salinity stress. The maximum H2 and CH4 yield (303.38 mL H2/g-VS and 253.84 mL CH4/g-VS) were observed at the salinity 9 g NaCl/L. Compared with that of zero salinity, they increased by 40.94% and 318.46%, respectively. Additionally, Sedimentibacter, an exoelectrogen that can participate in the direct interspecies electron transfer, also exhibited the highest relative abundance (34.96%) at the salinity 9 g NaCl/L. These findings obtained in this study might be of great importance for understanding the influence of salinity on the enhanced AD by ZVI.
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Affiliation(s)
- Shengjie Chen
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.
| | - Fubing Yao
- School of Metallurgy and Environment, Central South University, Changsha, 410083, PR China; Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution, Changsha, 410083, PR China
| | - Zhoujie Pi
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Li He
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Kun Luo
- Department of Materials and Environmental Engineering, Changsha University, Changsha, 410003, PR China
| | - Xiaoming Li
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Qi Yang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.
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Jiang M, Khunjar W, Li A, Chandran K. Divergent microbial structure still results in convergent microbial function during arrested anaerobic digestion of food waste at different hydraulic retention times. BIORESOURCE TECHNOLOGY 2024; 393:130069. [PMID: 38000643 DOI: 10.1016/j.biortech.2023.130069] [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: 09/18/2023] [Revised: 11/17/2023] [Accepted: 11/17/2023] [Indexed: 11/26/2023]
Abstract
In this study, two arrested anaerobic digestion bioreactors, fed with food waste, operated under different hydraulic retention times (HRTs) exhibited similar total volatile fatty acid (VFA) yields (p = 0.09). 16S rRNA gene sequencing revealed distinct microbial structure (p = 0.02) at the two HRTs. However, between the two HRTs, there were no differences in potential (DNA) and extant (mRNA) functionality for the production of acetic (AA)-, propionic (PA)-, butyric (BA)- and valeric-acid (VA), as indicated by the metagenome and metatranscriptome data, respectively. The highest potential and extant functionality for PA production in the reactor microbiomes mirrored the highest abundance of PA in the reactor effluents. Meta-omics analysis of BA production indicated possible metabolite exchange across different community members. Notably, the basis for similar VFA production performance observed under the HRTs tested lies in the community-level redundancy in convergent acidification functions and pathways, rather than trends in community-level structure alone.
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Affiliation(s)
- Minxi Jiang
- Earth and Environmental Engineering, Columbia University, New York, NY 10027, USA
| | | | - Anjie Li
- Key Laboratory of Water and Sediment Sciences of Ministry of Education, State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Kartik Chandran
- Earth and Environmental Engineering, Columbia University, New York, NY 10027, USA.
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4
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Tang T, Wang Y, Zhao X. New insights into antibiotic stimulation of methane production during anaerobic digestion. CHEMOSPHERE 2024; 349:140785. [PMID: 38016524 DOI: 10.1016/j.chemosphere.2023.140785] [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: 08/21/2023] [Revised: 11/09/2023] [Accepted: 11/21/2023] [Indexed: 11/30/2023]
Abstract
Residual antibiotics in swine wastewater pose a critical challenge for stable anaerobic digestion (AD). This study offers fresh insights into the anaerobic treatment of swine wastewater. The results showed that the presence of three typical antibiotics (sulfamethoxazole (SMX), oxytetracycline (OTC) and ciprofloxacin (CIP)) in swine wastewater could promote methane production by stimulating the production and conversion of ethanol. Among them, SMX exhibited the strongest methane promotion effect, with the cumulative methane production increasing from 138.47 to 2204.19 mL/g VS. According to the microbial community structure, antibiotics could promote the growth of Corynebacterium, Lutispora and hydrogenotrophic methanogens (Methanosassiliicoccus, Methanobrevibacter, and Methanobacterium), but inhibit the enrichment of acetoclastic methanogen (Methanosaeta). The relative abundance of Methanosaeta decreased from 2.93-19.80% to 0.52-2.58% under antibiotic stress. Furthermore, there were significant differences in the influence of different antibiotic types on methanogenic pathways. Specifically, OTC and CIP promoted the acetoclastic and hydrogenotrophic pathways, respectively, to enhance methane production. However, SMX could promote both acetoclastic and hydrogenotrophic pathways.
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Affiliation(s)
- Taotao Tang
- Southwest Municipal Engineering Design & Research Institute of China Co. Ltd., Chengdu, 610084, China
| | - Yin Wang
- Southwest Municipal Engineering Design & Research Institute of China Co. Ltd., Chengdu, 610084, China.
| | - Xiaolong Zhao
- Southwest Municipal Engineering Design & Research Institute of China Co. Ltd., Chengdu, 610084, China
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5
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Microbial Behavior and Influencing Factors in the Anaerobic Digestion of Distiller: A Comprehensive Review. FERMENTATION-BASEL 2023. [DOI: 10.3390/fermentation9030199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Anaerobic digestion technology is regarded as the most ideal technology for the treatment of a distiller in terms of environmental protection, resource utilization, and cost. However, there are some limitations to this process, the most prominent of which is microbial activity. The purpose of this paper is to provide a critical review of the microorganisms involved in the anaerobic digestion process of a distiller, with emphasis on the archaea community. The effects of operating parameters on microbial activity and process, such as pH, temperature, TAN, etc., are discussed. By understanding the activity of microorganisms, the anaerobic treatment technology of a distiller can be more mature. Aiming at the problem that anaerobic treatment of a distiller alone is not effective, the synergistic effect of different substrates is briefly discussed. In addition, the recent literature on the use of microorganisms to purify a distiller was collected in order to better purify the distiller and reduce harm. In the future, more studies are needed to elucidate the interactions between microorganisms and establish the mechanisms of microbial interactions in different environments.
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Lee MS, Hoadley A, Patel J, Lim S, Kozielski K, Li C. Techno-Economic Analysis for Direct Processing of Wet Solid Residues Originated from Grain and Inedible Plant Wastes. BIOENERGY RESEARCH 2022; 16:940-953. [PMID: 35992629 PMCID: PMC9383684 DOI: 10.1007/s12155-022-10501-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 08/02/2022] [Indexed: 05/06/2023]
Abstract
Large number of solid wastes is produced from ethanol and wine plants sourcing from grain and inedible plant wastes, for example, WDGS (wet distiller's grain with soluble) and DDGS (dry distiller's grain with soluble) produced from ethanol plants using corn. This study investigates alternative methods for using these co-products through combustion and anaerobic digestion. Process simulation and economic analysis were conducted using current market prices to evaluate the viability of the processes. Products in the form of energy are produced. Optimization of the corn ethanol plant was also explored for re-using the heat and electricity produced in those processes. These processes will supply more viable options to utilisation of those wastes. The anaerobic digestion of WDGS to produce electricity scenario was found to have the biggest profit among the four scenarios which can bring the annual income of 14.1 million Australian dollar to the ethanol plant. An environmental analysis of the CO2 emissions was also conducted. Using the Australian state emission factor, the amount of CO2 offset through both combustion and anaerobic digestion can be seen. The anaerobic digestion of WDGS to supply heat to the plant was proved having the largest CO2 abatement with the value of 0.58 kg-CO2e/L-EtOH. Supplementary Information The online version contains supplementary material available at 10.1007/s12155-022-10501-6.
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Affiliation(s)
- May-Suan Lee
- School of Chemical Engineering, Monash University, Clayton, VIC 3168 Australia
| | - Andrew Hoadley
- School of Chemical Engineering, Monash University, Clayton, VIC 3168 Australia
| | - Jim Patel
- CSIRO Energy, 71 Normanby Road, Clayton North, Victoria 3169 Australia
| | - Seng Lim
- CSIRO Energy, 71 Normanby Road, Clayton North, Victoria 3169 Australia
| | - Karen Kozielski
- CSIRO Energy, 71 Normanby Road, Clayton North, Victoria 3169 Australia
| | - Chao’en Li
- CSIRO Energy, 71 Normanby Road, Clayton North, Victoria 3169 Australia
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7
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Iltchenco J, Peruzzo V, Eva Magrini F, Marconatto L, Paula Torres A, Luiz Beal L, Paesi S. Microbiota profile in mesophilic biodigestion of sugarcane vinasse in batch reactors. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 84:2028-2039. [PMID: 34695028 DOI: 10.2166/wst.2021.375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The vinasse is a residue of ethanol production with the potential for methane production, requiring an allochthonous inoculum. Several microorganisms act in the different phases of anaerobic digestion, and the identification of these microbial communities is essential to optimize the process. The characterization of the microbiota involved in the biodigestion of vinasse was observed in the initial stage (IS), at the peak of methane production (MS) and the end of the process (FS) of the best performance assay by high-throughput sequencing. The highest methane production was 0.78 mmolCH4.gVS.h-1 at 243.7 h in the substrate/inoculum ratio of 1.7, with consumption partial of acetic, propionic and isobutyric acids and an 82% reduction of chemical oxygen demand. High microbial diversity was found. The genera Clostridium, Acinetobacter, Candidatus Cloacamonas, Bacteroides, Syntrophomonas, Kosmotoga, the family Porphyromonadaceae and the class Bacteroidia were the most abundant in the maximum methane production. Methane production was driven by Methanobacterium and Methanosaeta, suggesting the metabolic pathways used were hydrogenotrophic and acetoclastic.
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Affiliation(s)
- Janaina Iltchenco
- University of Caxias do Sul, Molecular Diagnostic Laboratory, Caxias do Sul, Brazil E-mail:
| | - Vanessa Peruzzo
- University of Caxias do Sul, Environmental Technologies Laboratory, Caxias do Sul, Brazil
| | - Flaviane Eva Magrini
- University of Caxias do Sul, Molecular Diagnostic Laboratory, Caxias do Sul, Brazil E-mail:
| | - Letícia Marconatto
- Pontifical Catholic University of Rio Grande do Sul, Institute of Petroleum and Natural Resources, Porto Alegre, Brazil
| | - Ana Paula Torres
- PETROBRAS, Research and Development Center Leopoldo Américo Miguez de Mello - CENPES, Rio de Janeiro, Brazil
| | - Lademir Luiz Beal
- University of Caxias do Sul, Environmental Technologies Laboratory, Caxias do Sul, Brazil
| | - Suelen Paesi
- University of Caxias do Sul, Molecular Diagnostic Laboratory, Caxias do Sul, Brazil E-mail:
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8
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High-Solid Anaerobic Digestion: Reviewing Strategies for Increasing Reactor Performance. ENVIRONMENTS 2021. [DOI: 10.3390/environments8080080] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
High-solid and solid-state anaerobic digestion are technologies capable of achieving high reactor productivity. The high organic load admissible for this type of configuration makes these technologies an ideal ally in the conversion of waste into bioenergy. However, there are still several factors associated with these technologies that result in low performance. The economic model based on a linear approach is unsustainable, and changes leading to the development of a low-carbon model with a high degree of circularity are necessary. Digestion technology may represent a key driver leading these changes but it is undeniable that the profitability of these plants needs to be increased. In the present review, the digestion process under high-solid-content configurations is analyzed and the different strategies for increasing reactor productivity that have been studied in recent years are described. Percolating reactor configurations and the use of low-cost adsorbents, nanoparticles and micro-aeration seem the most suitable approaches to increase volumetric production and reduce initial capital investment costs.
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9
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Magdalena JA, Greses S, González-Fernández C. Valorisation of bioethanol production residues through anaerobic digestion: Methane production and microbial communities. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 772:144954. [PMID: 33571777 DOI: 10.1016/j.scitotenv.2021.144954] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 12/29/2020] [Accepted: 12/29/2020] [Indexed: 06/12/2023]
Abstract
The organic fraction of municipal solid waste (OFMSW) is an appealing feedstock for bioethanol production due to its richness in cellulosic materials. After fermentation and distillation, the remaining residue constitutes a source of unconsumed carbohydrates, proteins and lipids. These macromolecules can be further used via anaerobic digestion (AD) for bioenergy purposes to offset bioethanol production costs. The present study evaluated the methanogenic potential of the whole fermented residue from a selective collection of OFMSW in a semicontinuous AD at 35 °C (HRT 40 days and OLR 2.09 g VS/Ld). The experimental results showed a methanogenic yield of 212 ± 5 mL CH4/g VSin (corresponding to a COD removal of 47 ± 1 %). Microbial analysis revealed key roles of species belonging to Firmicutes (65 %), Bacteroidetes (25 %) and Euryarchaeota (0.5-1 %). Methanosarcina archaea was highlighted as a robust methanogen crucial for methane production in a process in which the stability might be compromised by potential NH4+-N and VFAs inhibitions. This study indicated that the sequential combination of these two biochemical processes (fermentation and anaerobic digestion) allow to further exploit organic residues for their conversion into a marketable bioenergy product.
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Affiliation(s)
- Jose Antonio Magdalena
- Biotechnology Processes Unit, IMDEA Energy, Avda. Ramón de la Sagra 3, 28935 Móstoles, Madrid, Spain
| | - Silvia Greses
- Biotechnology Processes Unit, IMDEA Energy, Avda. Ramón de la Sagra 3, 28935 Móstoles, Madrid, Spain
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10
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Wang H, Larson RA, Borchardt M, Spencer S. Effect of mixing duration on biogas production and methanogen distribution in an anaerobic digester. ENVIRONMENTAL TECHNOLOGY 2021; 42:93-99. [PMID: 31159681 DOI: 10.1080/09593330.2019.1621951] [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: 10/11/2018] [Accepted: 05/09/2019] [Indexed: 06/09/2023]
Abstract
Mixing has been shown to have effect on biogas production in anaerobic digestion systems. To further examine this impact, a study was designed to evaluate nearly continuous mixing (mixing for 15 min followed by no mixing for 15 min, CON), intermediate mixing (mixing for 15 min followed by no mixing for 45 min, INT) and no mixing (unmixed, NO) on biogas production in three 208 L pilot-scale tank reactors. The experiments were conducted in triplicates at a controlled temperature of 37 ± 1°C, with a total solids percentage of 5%, a hydraulic retention time (HRT) of 21 days, and an organic loading rate (OLR) of 2 kg VS m-3 d- 1. Digesters with NO mixing had greater solids build up in the bottom quarter of the digester after four weeks' retention time. The methane percentage in biogas produced from digesters with INT and CON mixing were 63% and 62%, respectively, which were 4% and 5% higher than that from digesters with NO mixing (58%). The specific methane yield for digesters with NO, INT and CON mixing was 1.15, 1.15, and 1.49 m3-methane per kg-VS destroyed, however, those differences were not statistically significant (p > 0.05). Digesters had the least amount of Methanosarcinales of the methanogens measured under all treatments. However, the Methanosarcinales, Methanosarcinaceae, Methanomicrobiales, and the total amount of methanogens were less in digesters with INT mixing compared to NO and CON mixing treatments.
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Affiliation(s)
- Hui Wang
- Department of Biological Systems Engineering, University of Wisconsin - Madison, Madison, WI, USA
| | - Rebecca A Larson
- Department of Biological Systems Engineering, University of Wisconsin - Madison, Madison, WI, USA
| | - Mark Borchardt
- USDA Agricultural Research Service - Institute for Environmentally Integrated Dairy Management, Marshfield, WI, USA
| | - Susan Spencer
- USDA Agricultural Research Service - Institute for Environmentally Integrated Dairy Management, Marshfield, WI, USA
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11
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Llamas M, Magdalena JA, Greses S, Tomás-Pejó E, González-Fernández C. Insights on the microbial communities developed during the anaerobic fermentation of raw and pretreated microalgae biomass. CHEMOSPHERE 2021; 263:127942. [PMID: 32835976 DOI: 10.1016/j.chemosphere.2020.127942] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/17/2020] [Accepted: 08/05/2020] [Indexed: 06/11/2023]
Abstract
Short-chain fatty acids (SCFAs) are considered building blocks for bioproducts in the so-called carboxylate platform. These compounds can be sustainably produced via anaerobic fermentation (AF) of organic substrates, such as microalgae. However, SCFAs bioconversion efficiency is hampered by the hard cell wall of some microalgae. In this study, one thermal and two enzymatic pretreatments (carbohydrases and proteases) were employed to enhance Chlorella vulgaris biomass solubilization prior to AF. Pretreated and non-pretreated microalgae were assessed in continuous stirred tank reactors (CSTRs) for SCFAs production. Aiming to understand microorganisms' roles in AF depending on the employed substrate, not only bioconversion yields into SCFAs were evaluated but microbial communities were thoroughly characterized. Proteins were responsible for the inherent limitation of raw biomass conversion into SCFAs. Indeed, the proteolytic pretreatment resulted in the highest bioconversion (33.4% SCFAs-COD/CODin), displaying a 4-fold enhancement compared with raw biomass. Population dynamics revealed a microbial biodiversity loss along the AF regardless of the applied pretreatment, evidencing that the imposed operational conditions specialized the microbial community. In fact, a reduced abundance in Euryarchaeota phylum explained the low methanogenic activity, implying SCFAs accumulation. The bacterial community developed in the reactors fed with pretreated microalgae exhibited high acidogenic activities, being dominated by Firmicutes and Bacteroidetes. Firmicutes was by far the dominant phylum when using protease (65% relative abundance) while Bacteroidetes was prevailing in the reactor fed with carbohydrase-pretreated microalgae biomass (40% relative abundance). This fact indicated that the applied pretreatment and macromolecule solubilization have a strong effect on microbial distribution and therefore in SCFAs bioconversion yields.
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Affiliation(s)
- Mercedes Llamas
- Biotechnological Processes Unit, IMDEA Energy, Avda. Ramón de La Sagra 3,28935, Móstoles, Madrid, Spain
| | - Jose Antonio Magdalena
- Biotechnological Processes Unit, IMDEA Energy, Avda. Ramón de La Sagra 3,28935, Móstoles, Madrid, Spain
| | - Silvia Greses
- Biotechnological Processes Unit, IMDEA Energy, Avda. Ramón de La Sagra 3,28935, Móstoles, Madrid, Spain
| | - Elia Tomás-Pejó
- Biotechnological Processes Unit, IMDEA Energy, Avda. Ramón de La Sagra 3,28935, Móstoles, Madrid, Spain
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12
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Cardona L, Mazéas L, Chapleur O. Zeolite favours propionate syntrophic degradation during anaerobic digestion of food waste under low ammonia stress. CHEMOSPHERE 2021; 262:127932. [PMID: 32805662 DOI: 10.1016/j.chemosphere.2020.127932] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 07/20/2020] [Accepted: 08/05/2020] [Indexed: 05/22/2023]
Abstract
Zeolite addition has been widely suggested for its ability to overcome ammonia stress occurring during anaerobic digestion. However little is known regarding the underlying mechanisms of mitigation and especially how zeolite influences the microbial structuration. The aim of this study was to bring new contributions on the effect of zeolite on the microbial community arrangement under a low ammonia stress. Replicated batch experiments were conducted. The microbial population was characterised with 16S sequencing. Methanogenic pathways were identified with methane isotopic fractionation. In presence of ammonia, zeolite mitigated the decrease of biogas production rate. Zeolite induced the development of Izimaplasmatales order and preserved Peptococcaceae family members, known as propionate degraders. Moreover methane isotopic fractionation showed that hydrogenotrophic methanogenesis was maintained in presence of zeolite under ammonia low stress. Our results put forward the benefit of zeolite to improve the bacteria-archaea syntrophy needed for propionate degradation and methane production under a low ammonia stress.
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Affiliation(s)
- Laëtitia Cardona
- Université Paris-Saclay, INRAE, PROSE, 1 Rue Pierre-Gilles de Gennes, CS 10030, 92761, Antony Cedex, France.
| | - Laurent Mazéas
- Université Paris-Saclay, INRAE, PROSE, 1 Rue Pierre-Gilles de Gennes, CS 10030, 92761, Antony Cedex, France.
| | - Olivier Chapleur
- Université Paris-Saclay, INRAE, PROSE, 1 Rue Pierre-Gilles de Gennes, CS 10030, 92761, Antony Cedex, France.
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13
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Anaerobic Digestion of Steam-Exploded Wheat Straw and Co-Digestion Strategies for Enhanced Biogas Production. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10228284] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Wheat straw (WS) is considered a favourable substrate for biogas production. However, due to its rigid structure and high carbon to nitrogen (C/N ratio), its biodegradability during anaerobic digestion (AD) is usually low. In the present study, the effect of steam explosion pre-treatment on WS, combined with C/N adjustment with inorganic nitrogen, on biogas production was evaluated. Additionally, co-digestion of WS with protein-rich agri-industrial by-products (dried distillers’ grains with solubles (DDGS) and rapeseed meal (RM)) was assessed. Steam explosion enhanced biogas production from WS, whereas the addition of NH4Cl was beneficial (p < 0.05) for the digestion of steam-exploded wheat straw (SE). Furthermore, mono-digestion of the four different substrates seemed to be efficient in both inoculum to substrate ratios (I/S) tested (3.5 and 1.75 (w/w)). Finally, during co-digestion of WS and SE with DDGS and RM, an increase in the cumulative methane production was noted when higher amounts of DDGS and RM were co-digested. This study demonstrated that DDGS and RM can be used as an AD supplement to stimulate gas production and improve wheat straw biodegradability, while their addition at 10% on an AD system operating with WS can enhance gas yields at levels similar to those achieved by steam-exploded straw.
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14
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Wang F, Yi W, Zhang D, Liu Y, Shen X, Li Y. Anaerobic co-digestion of corn stover and wastewater from hydrothermal carbonation. BIORESOURCE TECHNOLOGY 2020; 315:123788. [PMID: 32652438 DOI: 10.1016/j.biortech.2020.123788] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 06/30/2020] [Accepted: 07/01/2020] [Indexed: 06/11/2023]
Abstract
This study aimed to investigate the interactions between wastewater of hydrothermal carbonation (W-HTC) and corn stover (CS) during anaerobic co-digestion. The results showed the maximum cumulative methane production of co-digestion was 280.7 ± 3.2 mL/g VS, and it increased by 5.84% and 10.69% compared with mono-digestion of CS and W-HTC, respectively. Increasing the HTC temperature and excess addition of W-HTC inhibits early and middle stage of co-digestion due to toxic organic inhibitors, and the negative effect of phenols is substantially more than furans. The microbial analysis illustrated the addition of W-HTC can promote the growth of Clostridia and Bacteroidia. The growth of Methanomassiliicoccus and Methanosarcina was more vigorous in most of co-digestions, which was positively correlated with methane production. The study concluded methanogenesis can be enhanced by the co-digestion of W-HTC and CS, which provide optimization of process conditions and some reaction mechanism for application of W-HTC in anaerobic digestion.
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Affiliation(s)
- Fang Wang
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong 255049, China; Shandong Research Center of Engineering and Technology for Clean Energy, Zibo, Shandong 255049, China
| | - Weiming Yi
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong 255049, China; Shandong Research Center of Engineering and Technology for Clean Energy, Zibo, Shandong 255049, China.
| | - Deli Zhang
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong 255049, China; Shandong Research Center of Engineering and Technology for Clean Energy, Zibo, Shandong 255049, China
| | - Yi Liu
- Biogas Institute of Ministry of Agricultural and Rural Affairs, Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agricultural and Rural Affairs, Chengdou, Sichuang 610041, China
| | - Xiuli Shen
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong 255049, China; Shandong Research Center of Engineering and Technology for Clean Energy, Zibo, Shandong 255049, China
| | - Yongjun Li
- School of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo, Shandong 255049, China; Shandong Research Center of Engineering and Technology for Clean Energy, Zibo, Shandong 255049, China
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15
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Maurus K, Ahmed S, Kazda M. Beneficial effects of intermittent feedstock management on biogas and methane production. BIORESOURCE TECHNOLOGY 2020; 304:123004. [PMID: 32087544 DOI: 10.1016/j.biortech.2020.123004] [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: 12/16/2019] [Revised: 02/07/2020] [Accepted: 02/08/2020] [Indexed: 06/10/2023]
Abstract
Intermittent supply of easily degradable carbohydrates can be used for on-demand biogas production. The study tested the effects of splitting feeding portions of sugar beet silage (S) on biogas production rates and total yield, respectively and if methane production rates follow those ones of biogas. Four experimental AD reactors were operated for 117 days at organic loading rates of 2.0 kgVS m-3 d-1 and VS ratios of maize silage (M) to S of 3:1. While M was supplied hourly (h0-h12), reactors differed only regarding the intermittent S supply, provided at once (h0), twice (h0, h1) and three times (h0, h1, h2) per twelve-hour observation period. Biogas and methane production rates rose simultaneously after S supply and lasted depending on S intakes. Biogas and methane yields were significantly increased at S given once and twice per period. Appropriate feedstock management can thus influence production rates and increase biogas and methane yields.
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Affiliation(s)
- Kerstin Maurus
- Ulm University, Institute of Systematic Botany and Ecology, Albert-Einstein-Allee 11, 89081 Ulm, Germany.
| | - Sharif Ahmed
- Ulm University, Institute of Systematic Botany and Ecology, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Marian Kazda
- Ulm University, Institute of Systematic Botany and Ecology, Albert-Einstein-Allee 11, 89081 Ulm, Germany
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16
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Park JG, Kwon HJ, Sposob M, Jun HB. Effect of a side-stream voltage supplied by sludge recirculation to an anaerobic digestion reactor. BIORESOURCE TECHNOLOGY 2020; 300:122643. [PMID: 31918298 DOI: 10.1016/j.biortech.2019.122643] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 12/13/2019] [Accepted: 12/16/2019] [Indexed: 06/10/2023]
Abstract
This study showed that side stream voltage supplied by sludge recirculation from an auxiliary bio-electrochemical anaerobic digestion (ABEAD) reactor appears to have a similar effect as main stream voltage supply to an anaerobic digestion (AD) reactor. The increased sludge recirculation rate enhanced the operation stability at a high OLR. H2-producing bacterial community was improved in bio-electrochemical anaerobic digestion (BEAD) and ABEAD reactors and was increased with increase in sludge recirculation rate. Despite the dominance of hydrogenotrophic methanogens in all reactors, high operational performances of BEAD and ABEAD reactors supports the results of H2-producing bacteria increase in those reactors. The ABEAD reactors having 1/7 of the capacity of the main AD reactor showed possibility of integration of BEAD technology into new and existing facilities economically. The findings of this study would provide useful information for approaching the commercialization of BEAD and suggest direction of further research for practical applications.
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Affiliation(s)
- Jun-Gyu Park
- Department of Environmental Engineering, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Hye-Jeong Kwon
- Department of Environmental Engineering, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Michal Sposob
- Department of Environmental Engineering, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Hang-Bae Jun
- Department of Environmental Engineering, Chungbuk National University, Cheongju 28644, Republic of Korea.
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17
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Effect of Hydraulic Retention Time on the Treatment of Real Cattle Slaughterhouse Wastewater and Biogas Production from HUASB Reactor. WATER 2020. [DOI: 10.3390/w12020490] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Anaerobic digestion technology provides an alternative route for sustainable management of organic waste. In this study, the performance of the hybrid upflow anaerobic sludge blanket (HUASB) reactor consisting of synthetic grass media as attached growth surface was investigated for the treatment of cattle slaughterhouse wastewater under mesophilic (35 ± 1 °C) condition. After acclimatization with synthetic wastewater, the reactor was loaded up to OLR 10 g L−1d−1, corresponding to 20 g COD/L at a varying hydraulic retention time (HRT) of 24, 30, 36, 42, and 48 h. The system attained a maximum COD removal efficiency of 97% total suspended solids (TSS), volatile suspended solids (VSS), fats, oil, and grease (FOG), color removal, and turbidity were found as 97%, 284 mg/L, 79%, 78%, and 91% respectively. The biogas production after 48 h was found as 38 L/d, with about 85% methane and specific methane production of 0.24 LCH4/gCODadded. The ratio of alkalinity was 0.22, while ammonia nitrogen concentration reached a maximum of 839 mg/L at a steady state. Scanning electron microscopic (SEM) analysis revealed a predominance of Methanosarcina bacteria with the coccoidal shape at the end of the performance study. Therefore, the results of the experiment showed that increasing HRT significantly affects the performance of the system.
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18
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Ghosh P, Kumar M, Kapoor R, Kumar SS, Singh L, Vijay V, Vijay VK, Kumar V, Thakur IS. Enhanced biogas production from municipal solid waste via co-digestion with sewage sludge and metabolic pathway analysis. BIORESOURCE TECHNOLOGY 2020; 296:122275. [PMID: 31683109 DOI: 10.1016/j.biortech.2019.122275] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 10/09/2019] [Accepted: 10/15/2019] [Indexed: 06/10/2023]
Abstract
The present study intends to evaluate the potential of co-digestion for utilizing Organic fraction of Municipal Solid Waste (OFMSW) and sewage sludge (SS) for enhanced biogas production. Metagenomic analysis was performed to identify the dominant bacteria, archaea and fungi, changes in their communities with time and their functional roles during the course of anaerobic digestion (AD). The cumulative biogas yield of 586.2 mL biogas/gVS with the highest methane concentration of 69.5% was observed under an optimum ratio of OFMSW:SS (40:60 w/w). Bacteria and fungi were found to be majorly involved in hydrolysis and initial stages of AD. Probably, the most common archaea Methanosarsina sp. primarily followed the acetoclastic pathway. The hydrogenotrophic pathway was less followed as indicated by the reduction in abundance of syntrophic acetate oxidizers. An adequate understanding of microbial communities is important to manipulate and inoculate the specific microbial consortia to maximize CH4 production through AD.
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Affiliation(s)
- Pooja Ghosh
- Centre for Rural Development and Technology, Indian Institute of Technology, New Delhi 110016, India.
| | - Madan Kumar
- Centre for Rural Development and Technology, Indian Institute of Technology, New Delhi 110016, India
| | - Rimika Kapoor
- Centre for Rural Development and Technology, Indian Institute of Technology, New Delhi 110016, India
| | - Smita S Kumar
- Centre for Rural Development and Technology, Indian Institute of Technology, New Delhi 110016, India
| | - Lakhveer Singh
- Faculty of Civil and Environmental Engineering, University Malaysia Pahang, Kuantan 26300, Malaysia
| | - Vandit Vijay
- Centre for Rural Development and Technology, Indian Institute of Technology, New Delhi 110016, India
| | - Virendra Kumar Vijay
- Centre for Rural Development and Technology, Indian Institute of Technology, New Delhi 110016, India
| | - Vivek Kumar
- Centre for Rural Development and Technology, Indian Institute of Technology, New Delhi 110016, India
| | - Indu Shekhar Thakur
- School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
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19
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Magdalena JA, Greses S, González-Fernández C. Impact of Organic Loading Rate in Volatile Fatty Acids Production and Population Dynamics Using Microalgae Biomass as Substrate. Sci Rep 2019; 9:18374. [PMID: 31804573 PMCID: PMC6895168 DOI: 10.1038/s41598-019-54914-4] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 11/21/2019] [Indexed: 12/16/2022] Open
Abstract
Volatile fatty acids (VFAs) are regarded as building blocks with a wide range of applications, including biofuel production. The traditional anaerobic digestion used for biogas production can be alternatively employed for VFAs production. The present study aimed at maximizing VFAs productions from Chlorella vulgaris through anaerobic digestion by assessing the effect of stepwise organic loading rates (OLR) increases (3, 6, 9, 12 and 15 g COD L-1 d-1). The biological system was proven to be robust as organic matter conversion efficiency into VFAs increased from 0.30 ± 0.02 COD-VFAs/CODin at 3 g COD L-1 d-1 to 0.37 ± 0.02 COD-VFAs/CODin at 12 g COD L-1d-1. Even though, the hydrolytic step was similar for all studied scenario sCOD/tCOD = 0.52-0.58), the highest OLR (15 g COD L-1 d-1) did not show any further increase in VFAs conversion (0.29 ± 0.01 COD-VFAs/CODin). This fact suggested acidogenesis inhibition at 15 g COD L-1d-1. Butyric (23-32%), acetic (19-26%) and propionic acids (11-17%) were the most abundant bioproducts. Population dynamics analysis revealed microbial specialization, with a high presence of Firmicutes followed by Bacteroidetes. In addition, this investigation showed the microbial adaptation of Euryarchaeota species at the highest OLR (15 g COD L-1d-1), evidencing one of the main challenges in VFAs production (out-competition of archaea community to avoid product consumption). Stepwise OLR increase can be regarded as a tool to promote VFAs productions. However, acidogenic inhibition was reported at the highest OLR instead of the traditional hydrolytic barriers. The operational conditions imposed together with the high VFAs and ammonium concentrations might have affected the system yields. The relative abundance of Firmicutes (74%) and Bacteroidetes (20%), as main phyla, together with the reduction of Euryarchaeota phylum (0.5%) were found the best combination to promote organic matter conversion into VFAs.
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Affiliation(s)
| | - Silvia Greses
- Biotechnological Processes Unit, IMDEA Energy, Madrid, Spain
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20
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Ozbayram EG, Kleinsteuber S, Nikolausz M. Biotechnological utilization of animal gut microbiota for valorization of lignocellulosic biomass. Appl Microbiol Biotechnol 2019; 104:489-508. [DOI: 10.1007/s00253-019-10239-w] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 10/25/2019] [Accepted: 11/04/2019] [Indexed: 10/25/2022]
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21
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Usman M, Hao S, Chen H, Ren S, Tsang DCW, O-Thong S, Luo G, Zhang S. Molecular and microbial insights towards understanding the anaerobic digestion of the wastewater from hydrothermal liquefaction of sewage sludge facilitated by granular activated carbon (GAC). ENVIRONMENT INTERNATIONAL 2019; 133:105257. [PMID: 31675572 DOI: 10.1016/j.envint.2019.105257] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 09/06/2019] [Accepted: 10/09/2019] [Indexed: 06/10/2023]
Abstract
Hydrothermal liquefaction of sewage sludge to produce bio-oil and hydro-char unavoidably results in the production of high-strength organic wastewater (HTLWW). However, anaerobic digestion (AD) of HTLWW generally has low conversion efficiency due to the presence of complex and refractory organics. The present study showed that granular activated carbon (GAC) promoted the AD of HTLWW in continuous experiments, resulting in the higher methane yield (259 mL/g COD) compared to control experiment (202 mL/g COD). It was found that GAC increased the activities of both aceticlastic and hydrogenotrophic methanogens. The molecular transformation of organics in HTLWW was further analyzed. It was shown GAC promoted the degradation of soluble microbial by-products, fulvic- and humic-like substances as revealed by 3-dimensional fluorescence excitation-emission matrix (3D-EEM) analysis. Gas chromatography mass spectrometry (GC-MS) analysis showed that GAC resulted in the higher degradation of N-heterocyclic compounds, acids and aromatic compounds and less production of new organic species. Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) analysis also showed that GAC promoted the degradation of nitrogenous organics. In addition, it was shown that GAC improved the removal of less oxidized, higher nitrogen content, and higher double bond equivalent (DBE) organic compounds. Microbial analysis showed that GAC not only increased the microbial concentration, but also enriched more syntrophic bacteria (e.g., Syntrophorhabdus and Synergistes), which were capable of degrading a wide range of different organics including nitrogenous and aromatic organics. Furthermore, profound effects on the methanogens and the enrichment of Methanothrix instead of Methanosarcina were observed. Overall, the present study revealed the molecular transformation and microbial mechanism in the AD of HTLWW with the presence of GAC.
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Affiliation(s)
- Muhammad Usman
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China
| | - Shilai Hao
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China; Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401, United States
| | - Huihui Chen
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China
| | - Shuang Ren
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Sompong O-Thong
- Department of Biology, Faculty of Science, Thaksin University, Phathalung, 93110, Thailand
| | - Gang Luo
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
| | - Shicheng Zhang
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
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22
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Taboada-Santos A, Braz GHR, Fernandez-Gonzalez N, Carballa M, Lema JM. Thermal hydrolysis of sewage sludge partially removes organic micropollutants but does not enhance their anaerobic biotransformation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 690:534-542. [PMID: 31301494 DOI: 10.1016/j.scitotenv.2019.06.492] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 06/28/2019] [Accepted: 06/28/2019] [Indexed: 06/10/2023]
Abstract
Pretreatment technologies prior to anaerobic digestion (AD) have been developed with the aim of enhancing biogas productivity and reducing the presence of pathogens in digested sludge. Among them, thermal hydrolysis (TH) appears as the most promising one. In wastewater treatment plants (WWTPs) sludge is the end point of many organic micropollutants (OMPs), which was proved to lead to important environmental and human risks since sludge is commonly used in agriculture. The objective of this work is to determine the fate OMPs in TH and subsequent AD. Sewage sludge was pretreated in a TH pilot plant at 170 °C for 20 min. Afterwards, two anaerobic digesters with a working volume of 14 L fed with fresh and pretreated sludge were operated in parallel in mesophilic conditions. TH proved to be an effective technology to partially or totally remove the dissolved fraction of OMPs as well as the fraction sorbed into those suspended solids that are solubilised after this pretreatment. However, it did not affect the OMPs sorbed concentration into solids that are not solubilised. Globally, the OMPs removal efficiency during TH appears to be linked to the solids solubilisation during this process. Afterwards, the OMPs biotransformation efficiency in AD of fresh and pretreated sludge was determined. Noticeable differences between the microbiome of both reactors was determined, but the anaerobic biotransformation was not substantially different for most of the OMPs. However, it affected musk fragrances, which presented considerably lower biotransformation efficiency in the reactor fed with pretreated sludge. Therefore, TH was proved effective in partially removing OMPs but not in enhancing their bioavailability and subsequent anaerobic biotransformation.
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Affiliation(s)
- Anton Taboada-Santos
- Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E- 15782 Santiago de Compostela, Spain.
| | - Guilherme H R Braz
- Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E- 15782 Santiago de Compostela, Spain.
| | - Nuria Fernandez-Gonzalez
- Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E- 15782 Santiago de Compostela, Spain.
| | - Marta Carballa
- Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E- 15782 Santiago de Compostela, Spain.
| | - Juan M Lema
- Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E- 15782 Santiago de Compostela, Spain.
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23
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Fischer MA, Ulbricht A, Neulinger SC, Refai S, Waßmann K, Künzel S, Schmitz RA. Immediate Effects of Ammonia Shock on Transcription and Composition of a Biogas Reactor Microbiome. Front Microbiol 2019; 10:2064. [PMID: 31555248 PMCID: PMC6742706 DOI: 10.3389/fmicb.2019.02064] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 08/21/2019] [Indexed: 12/22/2022] Open
Abstract
The biotechnological process of biogas production from organic material is carried out by a diverse microbial community under anaerobic conditions. However, the complex and sensitive microbial network present in anaerobic degradation of organic material can be disturbed by increased ammonia concentration introduced into the system by protein-rich substrates and imbalanced feeding. Here, we report on a simulated increase of ammonia concentration in a fed batch lab-scale biogas reactor experiment. Two treatment conditions were used simulating total ammonia nitrogen concentrations of 4.9 and 8.0 g/L with four replicate reactors. Each reactor was monitored concerning methane generation and microbial composition using 16S rRNA gene amplicon sequencing, while the transcriptional activity of the overall process was investigated by metatranscriptomic analysis. This allowed investigating the response of the microbial community in terms of species composition and transcriptional activity to a rapid upshift to high ammonia conditions. Clostridia and Methanomicrobiales dominated the microbial community throughout the entire experiment under both experimental conditions, while Methanosarcinales were only present in minor abundance. Transcription analysis demonstrated clostridial dominance with respect to genes encoding for enzymes of the hydrolysis step (cellulase, EC 3.2.1.4) as well as dominance of key genes for enzymes of the methanogenic pathway (methyl-CoM reductase, EC 2.8.4.1; heterodisulfide reductase, EC 1.8.98.1). Upon ammonia shock, the selected marker genes showed significant changes in transcriptional activity. Cellulose hydrolysis as well as methanogenesis were significantly reduced at high ammonia concentrations as indicated by reduced transcription levels of the corresponding genes. Based on these experiments we concluded that, apart from the methanogenic archaea, hydrolytic cellulose-degrading microorganisms are negatively affected by high ammonia concentrations. Further, Acholeplasma and Erysipelotrichia showed lower abundance under increased ammonia concentrations and thus might serve as indicator species for an earlier detection in order to counteract against ammonia crises.
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Affiliation(s)
- Martin A. Fischer
- Department of Biology, Institute of General Microbiology, Christian-Albrechts-University Kiel, Kiel, Germany
| | - Andrea Ulbricht
- Department of Biology, Institute of General Microbiology, Christian-Albrechts-University Kiel, Kiel, Germany
| | - Sven C. Neulinger
- Department of Biology, Institute of General Microbiology, Christian-Albrechts-University Kiel, Kiel, Germany
| | - Sarah Refai
- Department of Biology, Institut für Mikrobiologie und Biotechnologie, University Bonn, Bonn, Germany
| | - Kati Waßmann
- Department of Biology, Institut für Mikrobiologie und Biotechnologie, University Bonn, Bonn, Germany
| | - Sven Künzel
- Department for Evolutionary Genetics, Max-Planck-Institute for Evolutionary Biology, Plön, Germany
| | - Ruth A. Schmitz
- Department of Biology, Institute of General Microbiology, Christian-Albrechts-University Kiel, Kiel, Germany
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24
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Zealand AM, Mei R, Roskilly AP, Liu W, Graham DW. Molecular microbial ecology of stable versus failing rice straw anaerobic digesters. Microb Biotechnol 2019; 12:879-891. [PMID: 31233284 PMCID: PMC6681398 DOI: 10.1111/1751-7915.13438] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 05/13/2019] [Accepted: 05/14/2019] [Indexed: 12/01/2022] Open
Abstract
Waste rice straw (RS) is generated in massive quantities around the world and is often burned, creating greenhouse gas and air quality problems. Anaerobic digestion (AD) may be a better option for RS management, but RS is presumed to be comparatively refractory under anaerobic conditions without pre-treatment or co-substrates. However, this presumption assumes frequent reactor feeding regimes but less frequent feeding may be better for RS due to slow hydrolysis rates. Here, we assess how feeding frequency (FF) and organic loading rate (OLR) impacts microbial communities and biogas production in RS AD reactors. Using 16S rDNA amplicon sequencing and bioinformatics, microbial communities from five bench-scale bioreactors were characterized. At low OLR (1.0 g VS l-1 day-1 ), infrequently fed units (once every 21 days) had higher specific biogas yields than more frequent feeding (five in 7 days), although microbial community diversities were statistically similar (P > 0.05; ANOVA with Tukey comparison). In contrast, an increase in OLR to 2.0 g VS l-1 day-1 significantly changed Archaeal and fermenting Eubacterial sub-communities and the least frequency fed reactors failed. 'Stable' reactors were dominated by Methanobacterium, Methanosarcina and diverse Bacteroidetes, whereas 'failed' reactors saw shifts towards Clostridia and Christensenellaceae among fermenters and reduced methanogen abundances. Overall, OLR impacted RS AD microbial communities more than FF. However, combining infrequent feeding and lower OLRs may be better for RS AD because of higher specific yields.
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Affiliation(s)
- Andrew M. Zealand
- School of EngineeringNewcastle UniversityNewcastle upon TyneNE1 7RUUK
| | - Ran Mei
- Department of Civil and Environmental EngineeringUniversity of Illinois at Urbana‐Champaign205 North Mathews AveUrbanaIL61801USA
| | - Anthony P. Roskilly
- Sir Joseph Swan Centre for Energy ResearchNewcastle UniversityNewcastle upon TyneNE1 7RUUK
| | - WenTso Liu
- Department of Civil and Environmental EngineeringUniversity of Illinois at Urbana‐Champaign205 North Mathews AveUrbanaIL61801USA
| | - David W. Graham
- School of EngineeringNewcastle UniversityNewcastle upon TyneNE1 7RUUK
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25
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Changes of Bacterial Communities in an Anaerobic Digestion and a Bio-Electrochemical Anaerobic Digestion Reactors According to Organic Load. ENERGIES 2019. [DOI: 10.3390/en12152958] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Bacterial communities change in bulk solution of anaerobic digestion (AD) and bio-electrochemical anaerobic digestion reactors (BEAD) were monitored at each organic loading rate (OLR) to investigate the effect of voltage supply on bacterial species change in bulk solution. Chemical oxygen demand (COD) degradation and methane production from AD and BEAD reactors were also analyzed by gradually increasing food waste OLR. The BEAD reactor maintained stable COD removal and methane production at 6.0 kg/m3·d. The maximum OLR of AD reactor for optimal operation was 4.0 kg/m3·d. pH and alkalinity decline and volatile fatty acid (VFA) accumulation, which are the problem in high load anaerobic digestion of readily decomposable food wastes, were again the major factors destroying the optimal operation condition of the AD reactor at 6.0 kg/m3·d. Contrarily, the electrochemically activated dense communities of exoelectrogenic bacteria and VFA-oxidizing bacteria prevented VFAs from accumulating inside the BEAD reactor. This maintained stable pH and alkalinity conditions, ultimately contributing to stable methane production.
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26
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Senko O, Maslova O, Gladchenko M, Gaydamaka S, Akopyan A, Lysenko S, Karakhanov E, Efremenko E. Prospective Approach to the Anaerobic Bioconversion of Benzo- and Dibenzothiophene Sulfones to Sulfide. Molecules 2019; 24:E1736. [PMID: 31060211 PMCID: PMC6539665 DOI: 10.3390/molecules24091736] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 04/30/2019] [Accepted: 05/02/2019] [Indexed: 12/31/2022] Open
Abstract
Sulfur recovery from organic molecules such as toxic sulfones is an actual problem, and its solution through the use of environmentally friendly and nature-like processes looks attractive for research and application. For the first time, the possible bioconversion of organic sulfones (benzo-and dibenzothiophene sulfones) to inorganic sulfide under anaerobic conditions with simultaneous biogas production from glucose within a methanogenesis process is demonstrated. Biogas with a methane content of 50.7%-82.1% was obtained without H2S impurities. Methanogenesis with 99.7%-100% efficiency and 97.8%-100% conversion of benzo- and dibenzothiophene sulfones (up to 0.45 mM) to inorganic sulfide were obtained in eight days by using a combination of various anaerobic biocatalysts immobilized in a poly(vinyl alcohol) cryogel. Pure cell cultures of sulfate-reducing bacteria and/or H2-producing bacteria were tested as additives to the methanogenic activated sludge. The immobilized activated sludge "enhanced" by bacterial additives appeared to retain its properties and be usable multiple times for the conversion of sulfones under batch conditions.
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Affiliation(s)
- Olga Senko
- . Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia.
- Emanuel Institute of Biochemical Physics, Russian Academy of Science, Moscow 119334, Russia.
| | - Olga Maslova
- . Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia.
| | - Marina Gladchenko
- . Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia.
- Emanuel Institute of Biochemical Physics, Russian Academy of Science, Moscow 119334, Russia.
| | - Sergey Gaydamaka
- . Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia.
- Emanuel Institute of Biochemical Physics, Russian Academy of Science, Moscow 119334, Russia.
| | - Argam Akopyan
- . Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia.
| | - Sergey Lysenko
- . Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia.
| | - Eduard Karakhanov
- . Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia.
| | - Elena Efremenko
- . Faculty of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia.
- Emanuel Institute of Biochemical Physics, Russian Academy of Science, Moscow 119334, Russia.
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Performance Comparison of Conventional and Modified Upflow Anaerobic Sludge Blanket (UASB) Reactors Treating High-Strength Cattle Slaughterhouse Wastewater. WATER 2019. [DOI: 10.3390/w11040806] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Cattle slaughterhouse wastewater (CSWW) with an average chemical oxygen demand (COD) and biochemical oxygen demand of 32,000 mg/L and 17,000 mg/L, respectively, can cause a severe environmental hazard if discharged untreated. Conventional upflow anaerobic sludge blanket (UASB) reactor is used in the treatment of slaughterhouse wastewater to meet the discharge standard limit of wastewater discharge set by the Department of Environment Malaysia (DOE). However, at higher loading rates the conventional systems are characterized by slow-growing microorganism resulting in long startup period, surface scum formation, and sludge washout. In this work, the performance of two laboratory scale (12 L) conventional (R1) and modified (R2) UASB reactors treating CSWW at mesophilic (36 ± 1 °C) condition were investigated. Both reactors were subjected to increasing organic loading rate (OLR) from 1.75 to 32 g L−1 day−1. The average COD, BOD5, and TSS removal efficiencies were ˃90%, at an OLR between 1.75 to 5 g L−1 day−1. The study revealed that R1 drastically reduced to 50, 53, and 43% with increasing OLR until 16 g L−1 day−1, whereas R2 maintained 76, 77, and 88% respectively, under the same OLR. Sign of reactor instability was very much pronounced in R1, showing poorly active Methanosaeta spp., whereas R2 showed a predominantly active Methanosarcina spp.
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Li J, Liu W, Cai W, Wang B, Ajibade FO, Zhang Z, Tian X, Wang A. Applying rhamnolipid to enhance hydrolysis and acidogenesis of waste activated sludge: retarded methanogenic community evolution and methane production. RSC Adv 2019; 9:2034-2041. [PMID: 35516123 PMCID: PMC9059744 DOI: 10.1039/c8ra08993k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 01/09/2019] [Indexed: 12/04/2022] Open
Abstract
Recently, bio-surfactants, like rhamnolipid (RL), have been used as efficient pre-treatments to enhance the accumulation of short-chain fatty acids (SCFAs) from waste activated sludge (WAS). The current study found that SCFA accumulation occurred with evolutional variation in methanogen with RL (0.04 g RL g-1 TSS), resulting in a retarded methane production over a period of 20 days. However, a slow methane production was only detected before the 18th day, while the concentration of acetic acid (HAc) accumulated to a peak at 2616.94 ± 310.77 mg L-1 in the presence of RL, which was 2.58-fold higher than the control assay. During the retarded methane production, the concentration of dissolved hydrogen also increased to 49.27 ± 6.02 μmol L-1, in comparison with 22.45 μmol L-1 of control WAS without RL. According to the analysis of archaea communities induced by RL, hydrogenotrophic methanogens, like Methanobrevibacter, had been substantially promoted at the beginning of quick SCFA and hydrogen production, but their percentage decreased from 70% to 35% with time. Intrinsically, the growth of acetotrophic methanogens were postponed but they contributed most to the methane production in this research according to the correlation analysis.
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Affiliation(s)
- Jiaqi Li
- Key Laboratory of Environmental Biotechnology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences Beijing 100085 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Wenzong Liu
- Key Laboratory of Environmental Biotechnology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences Beijing 100085 China
| | - Weiwei Cai
- School of Civil Engineering, Beijing Jiaotong University Beijing 100044 China
| | - Bo Wang
- Key Laboratory of Environmental Biotechnology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences Beijing 100085 China
- Sino-Danish College, University of Chinese Academy of Sciences Beijing 100049 China
- Sino-Danish Centre for Education and Research Beijing 100190 China
| | - Fidelis Odedishemi Ajibade
- Key Laboratory of Environmental Biotechnology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences Beijing 100085 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Zhaojing Zhang
- Key Laboratory of Environmental Biotechnology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences Beijing 100085 China
- State Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology Dalian 116024 China
| | - Xiadi Tian
- Beijing Drainage Group Co. Ltd (BDG) Beijing China
| | - Aijie Wang
- Key Laboratory of Environmental Biotechnology, Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences Beijing 100085 China
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT) Harbin 150090 P. R. China
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Peña-Vargas MY, Durán-Moreno A. Influence of two types of sludge on the biogas production of assorted waste streams and the significance of beef cattle waste and liquid cheese whey in the organic fraction of municipal solid waste. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2019; 53:1235-1242. [PMID: 30623715 DOI: 10.1080/10934529.2018.1528037] [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: 03/09/2018] [Accepted: 05/17/2018] [Indexed: 06/09/2023]
Abstract
The aim of this study was to assess the biogas production generated by the anaerobic co-digestion of two co-substrates-liquid cheese whey (LCW) and beef cattle waste (BCW)-mixed with the organic fraction of municipal solid waste (OFMSW) and inoculated with either granular or suspended sludge. At the end of co-digestion, a high biogas yield was observed for the granular sludge mixture of OFMSW and BCW, which provides support for beef cattle waste as a promising substrate for biogas production. The mixture of OFMSW and LCW resulted in an enhancement of biogas production compared to OFMSW alone; however, the characteristics of LCW led to instability during the process. The key finding was that the type of sludge used influences the biogas production of the mixture. For the two sludges tested, the reactors containing granular sludge produced more biogas than those with suspended sludge. Reactors inoculated with a granular sludge produced 70% more biogas with the mixture of OFMSW and BCW compared to those with the suspended sludge. The OFMSW and LCW mixture with granular sludge produced 16% more biogas than with the suspended sludge.
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Affiliation(s)
- Mariela Yuvinka Peña-Vargas
- a Environmental Engineering Department, Faculty of Chemistry , Universidad Nacional Autónoma de México , Mexico City , México
| | - Alfonso Durán-Moreno
- a Environmental Engineering Department, Faculty of Chemistry , Universidad Nacional Autónoma de México , Mexico City , México
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Jiang Y, Dennehy C, Lawlor PG, Hu Z, McCabe M, Cormican P, Zhan X, Gardiner GE. Exploring the roles of and interactions among microbes in dry co-digestion of food waste and pig manure using high-throughput 16S rRNA gene amplicon sequencing. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:5. [PMID: 30622647 PMCID: PMC6318937 DOI: 10.1186/s13068-018-1344-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 12/20/2018] [Indexed: 05/12/2023]
Abstract
BACKGROUND With the increasing global population and increasing demand for food, the generation of food waste and animal manure increases. Anaerobic digestion is one of the best available technologies for food waste and pig manure management by producing methane-rich biogas. Dry co-digestion of food waste and pig manure can significantly reduce the reactor volume, capital cost, heating energy consumption and the cost of digestate liquid management. It is advantageous over mono-digestion of food waste or pig manure due to the balanced carbon/nitrogen ratio, high pH buffering capacity, and provision of trace elements. However, few studies have been carried out to study the roles of and interactions among microbes in dry anaerobic co-digestion systems. Therefore, this study aimed to assess the effects of different inocula (finished digestate and anaerobic sludge taken from wastewater treatment plants) and substrate compositions (food waste to pig manure ratios of 50:50 and 75:25 in terms of volatile solids) on the microbial community structure in food waste and pig manure dry co-digestion systems, and to examine the possible roles of the previously poorly described bacteria and the interactions among dry co-digestion-associated microbes. RESULTS The dry co-digestion experiment lasted for 120 days. The microbial profile during different anaerobic digestion stages was explored using high-throughput 16S rRNA gene amplicon sequencing. It was found that the inoculum factor was more significant in determining the microbial community structure than the substrate composition factor. Significant correlation was observed between the relative abundance of specific microbial taxa and digesters' physicochemical parameters. Hydrogenotrophic methanogens dominated in dry co-digestion systems. CONCLUSIONS The possible roles of specific microbial taxa were explored by correlation analysis, which were consistent with the literature. Based on this, the anaerobic digestion-associated roles of 11 bacteria, which were previously poorly understood, were estimated here for the first time. The inoculum played a more important role in determining the microbial community structure than substrate composition in dry co-digestion systems. Hydrogenotrophic methanogenesis was a significant methane production pathway in dry co-digestion systems.
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Affiliation(s)
- Yan Jiang
- Civil Engineering, College of Engineering & Informatics, National University of Ireland, Galway, Ireland
| | - Conor Dennehy
- Civil Engineering, College of Engineering & Informatics, National University of Ireland, Galway, Ireland
| | - Peadar G. Lawlor
- Pig Development Department, Animal & Grassland Research and Innovation Centre, Moorepark, Teagasc, Fermoy, Co. Cork, Ireland
| | - Zhenhu Hu
- School of Civil Engineering, Hefei University of Technology, Hefei, 230009 Anhui China
| | - Matthew McCabe
- Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland
| | - Paul Cormican
- Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland
| | - Xinmin Zhan
- Civil Engineering, College of Engineering & Informatics, National University of Ireland, Galway, Ireland
- Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, 518055 People’s Republic of China
| | - Gillian E. Gardiner
- Department of Science, Waterford Institute of Technology, Waterford, Ireland
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Han G, Shin SG, Cho K, Lee J, Kim W, Hwang S. Temporal variation in bacterial and methanogenic communities of three full-scale anaerobic digesters treating swine wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:1217-1226. [PMID: 29327188 DOI: 10.1007/s11356-017-1103-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 12/19/2017] [Indexed: 06/07/2023]
Abstract
To investigate the effects of temporal variations of process parameters on microbial community structures in the two types of full-scale anaerobic digester treating swine wastewater, three full-scale anaerobic digesters were monitored. An anaerobic filter (AF)-type digester located in Gong-Ju (GJ) showed the highest COD removal among three digesters and maintained stable efficiency. A digester in Hong-Seong (HS) was of the same type as it GJ and showed improved efficiency over the sampling period. A continuously stirred tank reactor (CSTR)-type digester in Soon-Cheon (SC) showed decreasing efficiency due to a high residual concentration of VFAs and NH4+. These process efficiencies were closely correlated to the Simpson indices of the methanogenic communities. Genera Bacillus, Methanosaeta, and Methanospirillum that have filamentous morphology were dominant in both AF-type digesters, but genera Acholeplasma, Methanosarcina, and Methanoculleus that have spherical or coccoid morphology were dominantly abundant in the CSTR-type digester. Correlation between populations suggests a possible syntrophic relationship between genera Desulfobulbus and Methanosaeta in digesters GJ and HS.
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Affiliation(s)
- Gyuseong Han
- School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, 790-784, Republic of Korea
| | - Seung Gu Shin
- Department of Energy Engineering, Future Convergence Technology Research Institute, Gyeongnam National University of Science and Technology, Jinju, South Korea
| | - Kyungjin Cho
- Center for Water Resource Cycle Research, Korea Institute of Science and Technology, 39-1, Hawolgok-Dong, Seongbuk-Gu, Seoul, 136-791, Republic of Korea
| | - Joonyeob Lee
- School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, 790-784, Republic of Korea
| | - Woong Kim
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea.
| | - Seokhwan Hwang
- School of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, Gyeongbuk, 790-784, Republic of Korea.
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32
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Kariyama ID, Zhai X, Wu B. Influence of mixing on anaerobic digestion efficiency in stirred tank digesters: A review. WATER RESEARCH 2018; 143:503-517. [PMID: 29990745 DOI: 10.1016/j.watres.2018.06.065] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 06/28/2018] [Accepted: 06/28/2018] [Indexed: 06/08/2023]
Abstract
A comprehensive review was carried out on the influence of mixing on anaerobic digestion (AD) efficiency in stirred tank anaerobic digesters. Though traditionally, stirred tank digesters operated as continuous stirred tank reactors (CSTRs), this review revealed that there is no motivation to continue to operate stirred tank anaerobic digesters as CSTRs if AD energy efficiency is to be improved. AD energy production efficiency can be achieved with optimized intermittent mixing. AD efficiency should include an assessment of the net energy production efficiency and should be the criteria in determining the mixing mode, mixing intensity, mixing time and mixing interval for every anaerobic digestion operating plan.
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Affiliation(s)
- Ibrahim Denka Kariyama
- Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, China
| | - Xiaodong Zhai
- Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, China
| | - Binxin Wu
- Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, China.
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Farhat A, Manai I, Gtari M, Bouallagui H. Effect of enhancing nutrient balance in anaerobic digester feedstock by co-substrate addition on the microbial diversity and energy production from municipal sewage sludge. J Biosci Bioeng 2018; 126:497-506. [DOI: 10.1016/j.jbiosc.2018.04.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 03/29/2018] [Accepted: 04/22/2018] [Indexed: 11/28/2022]
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Yu M, Gao M, Wang L, Ren Y, Wu C, Ma H, Wang Q. Kinetic modelling and synergistic impact evaluation for the anaerobic co-digestion of distillers' grains and food waste by ethanol pre-fermentation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:30281-30291. [PMID: 30155637 DOI: 10.1007/s11356-018-3027-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 08/20/2018] [Indexed: 06/08/2023]
Abstract
The anaerobic digestion of food waste (FW) often leads to acidification inhibition owing to rapid biodegradation, resulting in system instability. In this study, distillers' grains (DG) and food waste were mixed in accordance with volatile solid (VS) ratios of 0.9:0.1, 0.85:0.15, 0.8:0.2, and 0.7:0.3. The experimental groups adopted yeast to conduct ethanol pre-fermentation and then inoculated sludge to perform anaerobic digestion, while the control groups conducted anaerobic digestion without pre-treatment. Results showed that the experimental groups had lower propionic acid concentrations; higher alkalinities, pH values and methane production rates and shorter stagnation periods than the control groups regardless of the mixing ratio. Specifically, at the DG/FW ratio of 0.7:0.3, compared with the control group, the propionic acid concentration was reduced by 59.6%, the alkalinity was increased by 41.7%. Even under high organic loading, the propionic acid and VFA did not accumulate in the system after ethanol pre-fermentation, and the anaerobic digestion system remained stable. At DG/FW ratios of 0.9:0.1 and 0.85:0.15, a synergistic effect was observed during the co-digestion of DG and FW. And, the synergistic effect of EP was relatively high, especially when the DG/FW ratio was 0.9:0.1, and methane yield increased by 26.8%.
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Affiliation(s)
- Miao Yu
- Department of Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Ming Gao
- Department of Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Lihong Wang
- Department of Architectural Engineering, Handan Polytechnic College, Handan, Hebei, 056001, People's Republic of China
| | - Yuanyuan Ren
- Department of Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Chuanfu Wu
- Department of Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China
| | - Hongzhi Ma
- Department of Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China.
| | - Qunhui Wang
- Department of Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, Beijing, 100083, China
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Jiang Y, Dennehy C, Lawlor PG, Hu Z, McCabe M, Cormican P, Zhan X, Gardiner GE. Inhibition of volatile fatty acids on methane production kinetics during dry co-digestion of food waste and pig manure. WASTE MANAGEMENT (NEW YORK, N.Y.) 2018; 79:302-311. [PMID: 30343759 DOI: 10.1016/j.wasman.2018.07.049] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 07/04/2018] [Accepted: 07/27/2018] [Indexed: 05/16/2023]
Abstract
Compared with wet digestion, dry digestion of organic wastes reduces reactor volume and requires less energy for heating, but it is easily inhibited by high volatile fatty acid (VFA) or ammonia concentration. The inhibition on methane production kinetics during dry co-digestion of food waste and pig manure is rarely reported. The aim of this study was to explore the inhibition mechanisms and the microbial interactions in food waste and pig manure dry co-digestion systems at different inoculum rates (25% and 50% based on volatile solids) and food waste/pig manure ratios (0:100, 25:75, 50:50, 75:25 and 100:0 based on volatile solids). The results showed that the preferable operation conditions were obtained at the inoculum rate of 50% and food waste/pig manure ratio of 50:50, with a specific methane yield of 263 mL/g VSadded. High VFA concentration was the main inhibition factor on methane production, and the threshold VFA inhibition concentrations ranged 16.5-18.0 g/L. Syntrophic oxidation with hydrogenotrophic methanogenesis might be the main methane production pathway in dry co-digestion systems due to the dominance of hydrogenotrophic methanogens in the archaeal community. In conclusion, dry co-digestion of food waste and pig manure is feasible for methane production without pH adjustment and can be operated stably by choosing proper operation conditions.
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Affiliation(s)
- Yan Jiang
- Civil Engineering, College of Engineering & Informatics, National University of Ireland, Galway, Ireland
| | - Conor Dennehy
- Civil Engineering, College of Engineering & Informatics, National University of Ireland, Galway, Ireland
| | - Peadar G Lawlor
- Teagasc, Pig Development Department, Animal & Grassland Research and Innovation Centre, Moorepark, Fermoy, Co. Cork, Ireland
| | - Zhenhu Hu
- School of Civil Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, China
| | - Matthew McCabe
- Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland
| | - Paul Cormican
- Animal and Bioscience Research Department, Animal & Grassland Research and Innovation Centre, Teagasc, Grange, Co. Meath, Ireland
| | - Xinmin Zhan
- Civil Engineering, College of Engineering & Informatics, National University of Ireland, Galway, Ireland.
| | - Gillian E Gardiner
- Department of Science, Waterford Institute of Technology, Waterford, Ireland
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Dou Z, Dykstra CM, Pavlostathis SG. Bioelectrochemically assisted anaerobic digestion system for biogas upgrading and enhanced methane production. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 633:1012-1021. [PMID: 29758854 DOI: 10.1016/j.scitotenv.2018.03.255] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 03/21/2018] [Accepted: 03/21/2018] [Indexed: 06/08/2023]
Abstract
The objective of this study was to evaluate the effect of biofilm and external voltage on the performance and microbial community composition of batch-fed, combined anaerobic digestion-bioelectrochemical cell (AD-BEC) systems under different operational conditions. A dextrin/peptone mixture was fed at a range of organic loading rates (0.34 to 1.37g COD/L-d). The hybrid system with both suspended biomass and biofilm without any external potential application achieved a substantially higher initial soluble COD consumption (53.7±2.3% vs. 39.7±3.7) and methane (CH4) production (331 vs. 225mL) within one day of feeding than the conventional AD system (suspended biomass only). Compared to the conventional AD system, the hybrid systems had higher resilience to shock organic loadings. A range of external potential (0.5 to 2.0V vs. Ag/AgCl) was applied to AD-BEC reactors, developed with two different start-up procedures. A potential of 2.0V resulted in water electrolysis leading to a higher CH4 production rate (105 vs. 84mL/L-d) and biogas CH4 content (88.5±1.4 vs. 64.5±1.9%) in the AD-BEC reactor (closed vs. open circuit condition, respectively). Application of external potential enriched putative exoelectrogens at the anode biofilm and hydrogenotrophic methanogens at the cathode biofilm, which may have contributed to the observed enhanced CH4 production in the AD-BEC system. A phylotype related to Methanobacterium formicicum, a hydrogenotrophic methanogen, dominated the archaeal community in the AD-BEC cathode biofilm.
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Affiliation(s)
- Zeou Dou
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0512, USA
| | - Christy M Dykstra
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0512, USA
| | - Spyros G Pavlostathis
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0512, USA.
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37
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Sträuber H, Bühligen F, Kleinsteuber S, Dittrich-Zechendorf M. Carboxylic acid production from ensiled crops in anaerobic solid-state fermentation - trace elements as pH controlling agents support microbial chain elongation with lactic acid. Eng Life Sci 2018; 18:447-458. [PMID: 32624926 DOI: 10.1002/elsc.201700186] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 03/23/2018] [Accepted: 04/10/2018] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND For the production of carboxylic acid platform chemicals like medium-chain fatty acids (MCFA) by anaerobic fermentation, pH control is required. However, adding buffer solutions is ineffective in leach-bed reactors. AIM In order to increase the MCFA production by maize silage fermentation and to engineer the process we investigated the effect of solid alkaline iron and manganese additives on the process performance and microbial community dynamics. RESULTS Without additives, the pH dropped to 3.9 and lactic acid bacteria were favored. Total product yields of 207 ± 5.4 g organic acids (C2-C6) and alcohols per kg volatile solids were reached. The addition of trace elements increased the pH value and the product spectrum and yields changed. With a commercial iron additive, the product yields were higher (293 ± 15.2 g/kgvolatile solids) and supposedly clostridia used lactic acid for microbial chain elongation of acetic acid producing n-butyric acid. With the addition of pure Fe(OH)3 or Mn(OH)2, the total product yields were lower than in the other reactors. However, increased production of MCFA and the occurrence of distinct bacterial taxa (Lachnospiraceae, Ruminococcaceae and Megasphaera) related to this metabolic function were observed. CONCLUSIONS The application of alkaline trace metal additives as pH stabilizing agents can mitigate spatial metabolic heterogeneities when trace metal deficient substrates like specific crops or residues thereof are applied.
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Affiliation(s)
- Heike Sträuber
- Department of Environmental Microbiology Helmholtz Centre for Environmental Research - UFZ Leipzig Germany
| | - Franziska Bühligen
- Department of Environmental Microbiology Helmholtz Centre for Environmental Research - UFZ Leipzig Germany
| | - Sabine Kleinsteuber
- Department of Environmental Microbiology Helmholtz Centre for Environmental Research - UFZ Leipzig Germany
| | - Michael Dittrich-Zechendorf
- Department Biochemical Conversion Deutsches Biomasseforschungszentrum gemeinnützige GmbH (DBFZ) Leipzig Germany
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38
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Mustapha NA, Hu A, Yu CP, Sharuddin SS, Ramli N, Shirai Y, Maeda T. Seeking key microorganisms for enhancing methane production in anaerobic digestion of waste sewage sludge. Appl Microbiol Biotechnol 2018; 102:5323-5334. [DOI: 10.1007/s00253-018-9003-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 04/04/2018] [Accepted: 04/07/2018] [Indexed: 11/24/2022]
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Li C, Nges IA, Lu W, Wang H. Assessment of the degradation efficiency of full-scale biogas plants: A comparative study of degradation indicators. BIORESOURCE TECHNOLOGY 2017; 244:304-312. [PMID: 28780264 DOI: 10.1016/j.biortech.2017.07.157] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Revised: 07/22/2017] [Accepted: 07/26/2017] [Indexed: 06/07/2023]
Abstract
Increasing popularity and applications of the anaerobic digestion (AD) process has necessitated the development and identification of tools for obtaining reliable indicators of organic matter degradation rate and hence evaluate the process efficiency especially in full-scale, commercial biogas plants. In this study, four biogas plants (A1, A2, B and C) based on different feedstock, process configuration, scale and operational performance were selected and investigated. Results showed that the biochemical methane potential (BMP) based degradation rate could be use in incisively gauging process efficiency in lieu of the traditional degradation rate indicators. The BMP degradation rates ranged from 70 to 90% wherein plants A2 and C showed the highest throughput. This study, therefore, corroborates the feasibility of using the BMP degradation rate as a practical tool for evaluating process performance in full-scale biogas processes and spots light on the microbial diversity in full-scale biogas processes.
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Affiliation(s)
- Chao Li
- Division of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, Naturvetarvägen 14, 22241 Lund, Sweden; Nova Skantek Environmental Technology (Beijing) Co., Ltd, Beijing 100027, China; School of Environment, Tsinghua University, Beijing 100084, China.
| | - Ivo Achu Nges
- Division of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, Naturvetarvägen 14, 22241 Lund, Sweden
| | - Wenjing Lu
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Haoyu Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
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40
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Evaluation of relationship between biogas production and microbial communities in anaerobic co-digestion. KOREAN J CHEM ENG 2017. [DOI: 10.1007/s11814-017-0246-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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41
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He Q, Li L, Zhao X, Qu L, Wu D, Peng X. Investigation of foaming causes in three mesophilic food waste digesters: reactor performance and microbial analysis. Sci Rep 2017; 7:13701. [PMID: 29057910 PMCID: PMC5651842 DOI: 10.1038/s41598-017-14258-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 10/09/2017] [Indexed: 12/21/2022] Open
Abstract
Foaming negatively affects anaerobic digestion of food waste (FW). To identify the causes of foaming, reactor performance and microbial community dynamics were investigated in three mesophilic digesters treating FW. The digesters were operated under different modes, and foaming was induced with several methods. Proliferation of specific bacteria and accumulation of surface active materials may be the main causes of foaming. Volatile fatty acids (VFAs) and total ammonia nitrogen (TAN) accumulated in these reactors before foaming, which may have contributed to foam formation by decreasing the surface tension of sludge and increasing foam stability. The relative abundance of acid-producing bacteria (Petrimonas, Fastidiosipila, etc.) and ammonia producers (Proteiniphilum, Gelria, Aminobacterium, etc.) significantly increased after foaming, which explained the rapid accumulation of VFAs and NH4+ after foaming. In addition, the proportions of microbial genera known to contribute to foam formation and stabilization significantly increased in foaming samples, including bacteria containing mycolic acid in cell walls (Actinomyces, Corynebacterium, etc.) and those capable of producing biosurfactants (Corynebacterium, Lactobacillus, 060F05-B-SD-P93, etc.). These findings improve the understanding of foaming mechanisms in FW digesters and provide a theoretical basis for further research on effective suppression and early warning of foaming.
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Affiliation(s)
- Qin He
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, PR China
| | - Lei Li
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, PR China
| | - Xiaofei Zhao
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, PR China
| | - Li Qu
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, PR China
| | - Di Wu
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, PR China
| | - Xuya Peng
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, PR China.
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Wojcieszak M, Pyzik A, Poszytek K, Krawczyk PS, Sobczak A, Lipinski L, Roubinek O, Palige J, Sklodowska A, Drewniak L. Adaptation of Methanogenic Inocula to Anaerobic Digestion of Maize Silage. Front Microbiol 2017; 8:1881. [PMID: 29033919 PMCID: PMC5625012 DOI: 10.3389/fmicb.2017.01881] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 09/14/2017] [Indexed: 11/24/2022] Open
Abstract
A well-balanced microbial consortium is crucial for efficient biogas production. In turn, one of a major factor that influence on the structure of anaerobic digestion (AD) consortium is a source of microorganisms which are used as an inoculum. This study evaluated the influence of inoculum sources (with various origin) on adaptation of a biogas community and the efficiency of the biomethanization of maize silage. As initial inocula for AD of maize silage the samples from: (i) an agricultural biogas plant (ABP) which utilizes maize silage as a main substrate, (ii) cattle slurry (CS), which contain elevated levels of lignocelluloses materials, and (iii) raw sewage sludge (RSS) with low content of plant origin materials were used. The adaptation of methanogenic consortia was monitored during a series of passages, and the functionality of the adapted consortia was verified through start-up operation of AD in two-stage reactors. During the first stages of the adaptation phase, methanogenic consortia occurred very slowly, and only after several passages did the microbial community adapts to allow production of biogas with high methane content. The ABP consortium revealed highest biogas production in the adaptation and in the start-up process. The biodiversity dynamics monitored during adaptation and start-up process showed that community profile changed in a similar direction in three studied consortia. Native communities were very distinct to each other, while at the end of the Phase II of the start-up process microbial diversity profile was similar in all consortia. All adopted bacterial communities were dominated by representatives of Porphyromonadaceae, Rikenellaceae, Ruminococcaceae, and Synergistaceae. A shift from low acetate-preferring acetoclastic Methanosaetaceae (ABP and RSS) and/or hydrogenotrophic Archaea, e.g., Methanomicrobiaceae (CS) prevailing in the inoculum samples to larger populations of high acetate-preferring acetoclastic Methanosarcinaceae was observed by the end of the experiment. As a result, three independent, functional communities that syntrophically produced methane from acetate (primarily) and H2/CO2, methanol and methylamines were adapted. This study provides new insights into the specific process by which different inocula sampled from typical methanogenic environments that are commonly used to initiate industrial installations gradually adapted to allow biogas production from maize silage.
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Affiliation(s)
- Martyna Wojcieszak
- Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Adam Pyzik
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Krzysztof Poszytek
- Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Pawel S Krawczyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Adam Sobczak
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland.,Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Leszek Lipinski
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Otton Roubinek
- Institute of Nuclear Chemistry and Technology, Warsaw, Poland
| | - Jacek Palige
- Institute of Nuclear Chemistry and Technology, Warsaw, Poland
| | - Aleksandra Sklodowska
- Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Lukasz Drewniak
- Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Warsaw, Poland
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Yekta SS, Skyllberg U, Danielsson Å, Björn A, Svensson BH. Chemical speciation of sulfur and metals in biogas reactors - Implications for cobalt and nickel bio-uptake processes. JOURNAL OF HAZARDOUS MATERIALS 2017; 324:110-116. [PMID: 26777110 DOI: 10.1016/j.jhazmat.2015.12.058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 12/14/2015] [Accepted: 12/28/2015] [Indexed: 06/05/2023]
Abstract
This article deals with the interrelationship between overall chemical speciation of S, Fe, Co, and Ni in relation to metals bio-uptake processes in continuous stirred tank biogas reactors (CSTBR). To address this topic, laboratory CSTBRs digesting sulfur(S)-rich stillage, as well as full-scale CSTBRs treating sewage sludge and various combinations of organic wastes, termed co-digestion, were targeted. Sulfur speciation was evaluated using acid volatile sulfide extraction and X-ray absorption spectroscopy. Metal speciation was evaluated by chemical fractionation, kinetic and thermodynamic analyses. Relative Fe to S content is identified as a critical factor for chemical speciation and bio-uptake of metals. In reactors treating sewage sludge, quantity of Fe exceeds that of S, inducing Fe-dominated conditions, while sulfide dominates in laboratory and co-digestion reactors due to an excess of S over Fe. Under sulfide-dominated conditions, metals availability for microorganisms is restricted due to formation of metal-sulfide precipitates. However, aqueous concentrations of different Co and Ni species were shown to be sufficient to support metal acquisition by microorganisms under sulfidic conditions. Concentrations of free metal ions and labile metal complexes in aqueous phase, which directly participate in bio-uptake processes, are higher under Fe-dominated conditions. This in turn enhances metal adsorption on cell surfaces and bio-uptake rates.
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Affiliation(s)
- Sepehr Shakeri Yekta
- Department of Thematic Studies-Environmental Change, Linköping University, SE-581 83 Linköping, Sweden.
| | - Ulf Skyllberg
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden
| | - Åsa Danielsson
- Department of Thematic Studies-Environmental Change, Linköping University, SE-581 83 Linköping, Sweden
| | - Annika Björn
- Department of Thematic Studies-Environmental Change, Linköping University, SE-581 83 Linköping, Sweden
| | - Bo H Svensson
- Department of Thematic Studies-Environmental Change, Linköping University, SE-581 83 Linköping, Sweden
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Lee J, Kim JR, Jeong S, Cho J, Kim JY. Long-term performance of anaerobic digestion for crop residues containing heavy metals and response of microbial communities. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 59:498-507. [PMID: 27765495 DOI: 10.1016/j.wasman.2016.10.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 09/19/2016] [Accepted: 10/05/2016] [Indexed: 06/06/2023]
Abstract
In order to investigate the long-term stability on the performance of the anaerobic digestion process, a laboratory-scale continuous stirred-tank reactor (CSTR) was operated for 1100 days with sunflower harvested in a heavy metal contaminated site. Changes of microbial communities during digestion were identified using pyrosequencing. According to the results, soluble heavy metal concentrations were lower than the reported inhibitory level and the reactor performance remained stable up to OLR of 2.0g-VS/L/day at HRT of 20days. Microbial communities commonly found in anaerobic digestion for cellulosic biomass were observed and stably established with respect to the substrate. Thus, the balance of microbial metabolism was maintained appropriately and anaerobic digestion seems to be feasible for disposal of heavy metal-containing crop residues from phytoremediation sites.
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Affiliation(s)
- Jongkeun Lee
- Department of Civil and Environmental Engineering, College of Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Joonrae Roger Kim
- Department of Civil and Environmental Engineering, College of Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Seulki Jeong
- Environmental Risk & Welfare Research Team, Seoul Center, Korea Basic Science Institute, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Jinwoo Cho
- Department of Environmental and Energy, College of Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-Gu, Seoul 05006, Republic of Korea
| | - Jae Young Kim
- Department of Civil and Environmental Engineering, College of Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
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45
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Wintsche B, Glaser K, Sträuber H, Centler F, Liebetrau J, Harms H, Kleinsteuber S. Trace Elements Induce Predominance among Methanogenic Activity in Anaerobic Digestion. Front Microbiol 2016; 7:2034. [PMID: 28018337 PMCID: PMC5160323 DOI: 10.3389/fmicb.2016.02034] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 12/02/2016] [Indexed: 11/30/2022] Open
Abstract
Trace elements (TE) play an essential role in all organisms due to their functions in enzyme complexes. In anaerobic digesters, control, and supplementation of TEs lead to stable and more efficient methane production processes while TE deficits cause process imbalances. However, the underlying metabolic mechanisms and the adaptation of the affected microbial communities to such deficits are not yet fully understood. Here, we investigated the microbial community dynamics and resulting process changes induced by TE deprivation. Two identical lab-scale continuous stirred tank reactors fed with distiller’s grains and supplemented with TEs (cobalt, molybdenum, nickel, tungsten) and a commercial iron additive were operated in parallel. After 72 weeks of identical operation, the feeding regime of one reactor was changed by omitting TE supplements and reducing the amount of iron additive. Both reactors were operated for further 21 weeks. Various process parameters (biogas production and composition, total solids and volatile solids, TE concentration, volatile fatty acids, total ammonium nitrogen, total organic acids/alkalinity ratio, and pH) and the composition and activity of the microbial communities were monitored over the total experimental time. While the methane yield remained stable, the concentrations of hydrogen sulfide, total ammonia nitrogen, and acetate increased in the TE-depleted reactor compared to the well-supplied control reactor. Methanosarcina and Methanoculleus dominated the methanogenic communities in both reactors. However, the activity ratio of these two genera was shown to depend on TE supplementation explainable by different TE requirements of their energy conservation systems. Methanosarcina dominated the well-supplied anaerobic digester, pointing to acetoclastic methanogenesis as the dominant methanogenic pathway. Under TE deprivation, Methanoculleus and thus hydrogenotrophic methanogenesis was favored although Methanosarcina was not overgrown by Methanoculleus. Multivariate statistics revealed that the decline of nickel, cobalt, molybdenum, tungsten, and manganese most strongly influenced the balance of mcrA transcripts from both genera. Hydrogenotrophic methanogens seem to be favored under nickel- and cobalt-deficient conditions as their metabolism requires less nickel-dependent enzymes and corrinoid cofactors than the acetoclastic and methylotrophic pathways. Thus, TE supply is critical to sustain the activity of the versatile high-performance methanogen Methanosarcina.
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Affiliation(s)
- Babett Wintsche
- Department of Environmental Microbiology, Helmholtz Centre for Environmental Research - UFZ Leipzig, Germany
| | - Karin Glaser
- Department of Applied Ecology and Phycology, University of Rostock Rostock, Germany
| | - Heike Sträuber
- Department of Environmental Microbiology, Helmholtz Centre for Environmental Research - UFZ Leipzig, Germany
| | - Florian Centler
- Department of Environmental Microbiology, Helmholtz Centre for Environmental Research - UFZ Leipzig, Germany
| | - Jan Liebetrau
- Department of Biochemical Conversion, Deutsches Biomasseforschungszentrum - DBFZ Leipzig, Germany
| | - Hauke Harms
- Department of Environmental Microbiology, Helmholtz Centre for Environmental Research - UFZLeipzig, Germany; German Centre for Integrative Biodiversity Research (iDiv)Leipzig, Germany
| | - Sabine Kleinsteuber
- Department of Environmental Microbiology, Helmholtz Centre for Environmental Research - UFZ Leipzig, Germany
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Comparative Analysis of Methanogenic Communities in Different Laboratory-Scale Anaerobic Digesters. ARCHAEA-AN INTERNATIONAL MICROBIOLOGICAL JOURNAL 2016; 2016:3401272. [PMID: 28074084 PMCID: PMC5198152 DOI: 10.1155/2016/3401272] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 11/07/2016] [Accepted: 11/21/2016] [Indexed: 11/17/2022]
Abstract
Comparative analysis of methanogenic archaea compositions and dynamics in 11 laboratory-scale continuous stirred tank reactors fed with different agricultural materials (chicken manure, cattle manure, maize straw, maize silage, distillers grains, and Jatropha press cake) was carried out by analysis of the methyl coenzyme-M reductase α-subunit (mcrA) gene. Various taxa within Methanomicrobiales, Methanobacteriaceae, Methanosarcinaceae, Methanosaetaceae, and Methanomassiliicoccales were detected in the biogas reactors but in different proportions depending on the substrate type utilized as well as various process parameters. Improved coverage and higher taxonomic resolution of methanogens were obtained compared to a previous 16S rRNA gene based study of the same reactors. Some members of the genus Methanoculleus positively correlated with the relative methane content, whereas opposite correlations were found for Methanobacterium. Specific biogas production was found to be significantly correlating with Methanosarcinaceae. Statistical analysis also disclosed that some members of the genus Methanoculleus positively correlated with the ammonia level, whereas the prevalence of Methanocorpusculum, Methanobacterium, and Methanosaeta was negatively correlated with this parameter. These results suggest that the application of methanogenic archaea adapted to specific feedstock might enhance the anaerobic digestion of such waste materials in full-scale biogas reactors.
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47
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Gokal J, Awolusi OO, Enitan AM, Kumari S, Bux F. Chapter 4 Molecular Characterization and Quantification of Microbial Communities in Wastewater Treatment Systems. Microb Biotechnol 2016. [DOI: 10.1201/9781315367880-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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48
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Xia T, Gao X, Wang C, Xu X, Zhu L. An enhanced anaerobic membrane bioreactor treating bamboo industry wastewater by bamboo charcoal addition: Performance and microbial community analysis. BIORESOURCE TECHNOLOGY 2016; 220:26-33. [PMID: 27552720 DOI: 10.1016/j.biortech.2016.08.057] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 08/11/2016] [Accepted: 08/13/2016] [Indexed: 06/06/2023]
Abstract
In this study, two anaerobic membrane bioreactors (AnMBRs) were operated for 150days to treat bamboo industry wastewater (BIWW), and one of them was enhanced with bamboo charcoal (B-AnMBR). During the steady period, average chemical oxygen demand (COD) removal efficiencies of 94.5±2.9% and 89.1±3.1% were achieved in B-AnMBR and AnMBR, respectively. The addition of bamboo charcoal (BC) increased the amount of biomass and improved the performance of the systems. A higher biogas production and methane yield were also observed in B-AnMBR. Regarding the issue of membrane fouling, BC lowered the soluble microbial product (SMP) content by approximately 62.73mg/L and decreased the membrane resistance, thereby mitigating membrane fouling. Analysis of the microbial communities demonstrated that BC increased the microbial diversity and promoted the activity of Methanosaeta, Methanospirillum, and Methanobacterium, which are dominant in methane production.
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Affiliation(s)
- Tian Xia
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
| | - Xinyi Gao
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
| | - Caiqin Wang
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China
| | - Xiangyang Xu
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China; Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety, Hangzhou 310058, China
| | - Liang Zhu
- Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China; Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety, Hangzhou 310058, China.
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49
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Ziganshin AM, Schmidt T, Lv Z, Liebetrau J, Richnow HH, Kleinsteuber S, Nikolausz M. Reduction of the hydraulic retention time at constant high organic loading rate to reach the microbial limits of anaerobic digestion in various reactor systems. BIORESOURCE TECHNOLOGY 2016; 217:62-71. [PMID: 26853042 DOI: 10.1016/j.biortech.2016.01.096] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Revised: 01/22/2016] [Accepted: 01/25/2016] [Indexed: 05/27/2023]
Abstract
The effects of hydraulic retention time (HRT) reduction at constant high organic loading rate on the activity of hydrogen-producing bacteria and methanogens were investigated in reactors digesting thin stillage. Stable isotope fingerprinting was additionally applied to assess methanogenic pathways. Based on hydA gene transcripts, Clostridiales was the most active hydrogen-producing order in continuous stirred tank reactor (CSTR), fixed-bed reactor (FBR) and anaerobic sequencing batch reactor (ASBR), but shorter HRT stimulated the activity of Spirochaetales. Further decreasing HRT diminished Spirochaetales activity in systems with biomass retention. Based on mcrA gene transcripts, Methanoculleus and Methanosarcina were the predominantly active in CSTR and ASBR, whereas Methanosaeta and Methanospirillum activity was more significant in stably performing FBR. Isotope values indicated the predominance of aceticlastic pathway in FBR. Interestingly, an increased activity of Methanosaeta was observed during shortening HRT in CSTR and ASBR despite high organic acids concentrations, what was supported by stable isotope data.
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Affiliation(s)
- Ayrat M Ziganshin
- Department of Microbiology, Kazan (Volga Region) Federal University, Kazan 420008, The Republic of Tatarstan, Russia
| | - Thomas Schmidt
- Department of Biochemical Conversion, Deutsches Biomasseforschungszentrum gGmbH, 04347 Leipzig, Germany; Faculty of Agricultural and Environmental Sciences, University of Rostock, 18059 Rostock, Germany
| | - Zuopeng Lv
- Department of Environmental Microbiology, Helmholtz Centre for Environmental Research - UFZ, 04318 Leipzig, Germany
| | - Jan Liebetrau
- Department of Biochemical Conversion, Deutsches Biomasseforschungszentrum gGmbH, 04347 Leipzig, Germany
| | - Hans Hermann Richnow
- Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research - UFZ, 04318 Leipzig, Germany
| | - Sabine Kleinsteuber
- Department of Environmental Microbiology, Helmholtz Centre for Environmental Research - UFZ, 04318 Leipzig, Germany
| | - Marcell Nikolausz
- Department of Environmental Microbiology, Helmholtz Centre for Environmental Research - UFZ, 04318 Leipzig, Germany.
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50
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Hwang OH, Cho SB, Han DW, Lee SR, Kwag JH, Park SK. Effect of Storage Period on the Changes of Odorous Compound Concentrations and Bacterial Ecology for Identifying the Cause of Odor Production from Pig Slurry. PLoS One 2016; 11:e0162714. [PMID: 27642752 PMCID: PMC5028028 DOI: 10.1371/journal.pone.0162714] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 08/26/2016] [Indexed: 11/19/2022] Open
Abstract
Odor from buildings where pigs are housed is generated by anaerobic fermentation of undigested materials in pig slurry stored for several weeks in pit. The objective of this study was to investigate the effect of storage period on the level of odorous compounds in pig slurry and on its bacterial community. A slurry sample (15 L) was taken from the pit of a finisher pig building and incubated in acryl chambers for six- weeks. Slurry for analysis was sampled every two-week. Levels of odorous compounds in the slurry sample were drastically changed after two weeks of storage period; levels of phenols and short chain fatty acids (SCFAs) were decreased (P<0.05), whereas indoles and branched-chain fatty acids (BCFAs) were increased (P<0.05). Among dominant bacteria, Bacteroides and Porphyromonadacese_uc_g revealed a strong positive correlation with the levels of phenols and SCFAs. Populations of AC160630_g, Acholeplasmatales_uc_g, Mollicutes_uc_g and Cloacamonas_f_uc_g positively correlated with indole and BCFAs content. Taken together, levels of odorous compounds were increased after two weeks of storage, possibly because of changes in the predominant bacterial groups to those that use protein as a carbon source in the hypo-carbohydrate conditions.
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Affiliation(s)
- Ok Hwa Hwang
- National Institute of Animal Science, Rural Development Administration, Wanju-Gun, Jeollabuk-Do, Republic of Korea
| | - Sung Back Cho
- National Institute of Animal Science, Rural Development Administration, Wanju-Gun, Jeollabuk-Do, Republic of Korea
| | - Deug Woo Han
- National Institute of Animal Science, Rural Development Administration, Wanju-Gun, Jeollabuk-Do, Republic of Korea
| | - Sang Ryoung Lee
- National Institute of Animal Science, Rural Development Administration, Wanju-Gun, Jeollabuk-Do, Republic of Korea
| | - Jeong Hoon Kwag
- National Institute of Animal Science, Rural Development Administration, Wanju-Gun, Jeollabuk-Do, Republic of Korea
| | - Sung Kwon Park
- Department of Food Science and Technology, Sejong University, Seoul, Republic of Korea
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