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Hafez RM, Tawfik A, Hassan GK, Zahran MK, Younes AA, Ziembińska-Buczyńska A, Gamoń F, Nasr M. Synergism of floated paperboard sludge cake /sewage sludge for maximizing biomethane yield and biochar recovery from digestate: A step towards circular economy. CHEMOSPHERE 2024; 362:142639. [PMID: 38909865 DOI: 10.1016/j.chemosphere.2024.142639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/21/2024] [Accepted: 06/16/2024] [Indexed: 06/25/2024]
Abstract
Anaerobic digestion of floated paperboard sludge (PS) cake suffers from volatile fatty acids (VFAs) accumulation, nutrient unbalanced condition, and generation of digestate with a risk of secondary pollution. To overcome these drawbacks, sewage sludge (SS) was added to PS cake for biogas recovery improvement under a co-digestion process followed by the thermal treatment of solid fraction of digestate for biochar production. Batch experimental assays were conducted at different SS:PS mixing ratios of 70:30, 50:50, 30:70, and 20:80 (w/w), and their anaerobic co-digestion performances were compared to the mono-digestion systems at 35 ± 0.2 °C for 45 days. The highest methane yield (MY) of 241.68 ± 14.81 mL/g CODremoved was obtained at the optimum SS:PS ratio of 50:50 (w/w). This experimental condition was accompanied by protein, carbohydrate, and VFA conversion efficiencies of 47.3 ± 3.2%, 46.8 ± 3.2%, and 56.3 ± 3.8%, respectively. The synergistic effect of SS and PS cake encouraged the dominance of Bacteroidota (23.19%), Proteobacteria (49.65%), Patescibacteria (8.12%), and Acidovorax (12.60%) responsible for hydrolyzing the complex organic compounds and converting the VFAs into biomethane. Further, the solid fraction of digestate was subjected to thermal treatment at a temperature of 500 °C for 2.0 h, under an oxygen-limited condition. The obtained biochar had a yield of 0.48 g/g dry digestate, and its oxygen-to-carbon (O/C), carbon-to-nitrogen (C/N), and carbon-to-phosphorous (C/P) ratios were 0.55, 10.23, and 16.42, respectively. A combined anaerobic co-digestion/pyrolysis system (capacity 50 m3/d) was designed based on the COD mass balance experimental data and biogenic CO2 market price of 22 USD/ton. This project could earn profits from biogas (12,565 USD/yr), biochar (6641 USD/yr), carbon credit (8014 USD/yr), and COD shadow price (6932 USD/yr). The proposed project could maintain a payback period of 6.60 yr. However, further studies are required to determine the associated life cycle cost model that is useful to validate the batch experiment assumptions.
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Affiliation(s)
- Rania M Hafez
- Water Pollution Research Department, National Research Centre, 33 El-Buhouth St., Dokki, Cairo, 12311, Egypt
| | - Ahmed Tawfik
- Department of Environmental Sciences, College of Life Sciences, Kuwait University, P.O. Box 5969, Safat, 13060, Kuwait.
| | - Gamal K Hassan
- Water Pollution Research Department, National Research Centre, 33 El-Buhouth St., Dokki, Cairo, 12311, Egypt
| | - Magdy Kandil Zahran
- Chemistry Department, Faculty of Science, Helwan University, Ain-Helwan, Cairo, 11795, Egypt
| | - Ahmed A Younes
- Chemistry Department, Faculty of Science, Helwan University, Ain-Helwan, Cairo, 11795, Egypt
| | | | - Filip Gamoń
- Gdansk University of Technology, Faculty of Civil and Environmental Engineering, Department of Sanitary Engineering, 11/12 Narutowicza St, Gdansk, 80-233, Poland
| | - Mahmoud Nasr
- Sanitary Engineering Department, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt
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2
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A Review of Basic Bioinformatic Techniques for Microbial Community Analysis in an Anaerobic Digester. FERMENTATION-BASEL 2023. [DOI: 10.3390/fermentation9010062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Biogas production involves various types of intricate microbial populations in an anaerobic digester (AD). To understand the anaerobic digestion system better, a broad-based study must be conducted on the microbial population. Deep understanding of the complete metagenomics including microbial structure, functional gene form, similarity/differences, and relationships between metabolic pathways and product formation, could aid in optimization and enhancement of AD processes. With advancements in technologies for metagenomic sequencing, for example, next generation sequencing and high-throughput sequencing, have revolutionized the study of microbial dynamics in anaerobic digestion. This review includes a brief introduction to the basic process of metagenomics research and includes a detailed summary of the various bioinformatics approaches, viz., total investigation of data obtained from microbial communities using bioinformatics methods to expose metagenomics characterization. This includes (1) methods of DNA isolation and sequencing, (2) investigation of anaerobic microbial communities using bioinformatics techniques, (3) application of the analysis of anaerobic microbial community and biogas production, and (4) restriction and prediction of bioinformatics analysis on microbial metagenomics. The review has been concluded, giving a summarized insight into bioinformatic tools and also promoting the future prospects of integrating humungous data with artificial intelligence and neural network software.
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Young D, Joshi A, Huang L, Munk B, Wurzbacher C, Youssef NH, Elshahed MS, Moon CD, Ochsenreither K, Griffith GW, Callaghan TM, Sczyrba A, Lebuhn M, Flad V. Simultaneous Metabarcoding and Quantification of Neocallimastigomycetes from Environmental Samples: Insights into Community Composition and Novel Lineages. Microorganisms 2022; 10:1749. [PMID: 36144352 PMCID: PMC9504928 DOI: 10.3390/microorganisms10091749] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 08/16/2022] [Accepted: 08/24/2022] [Indexed: 11/30/2022] Open
Abstract
Anaerobic fungi from the herbivore digestive tract (Neocallimastigomycetes) are primary lignocellulose modifiers and hold promise for biotechnological applications. Their molecular detection is currently difficult due to the non-specificity of published primer pairs, which impairs evolutionary and ecological research with environmental samples. We developed and validated a Neocallimastigomycetes-specific PCR primer pair targeting the D2 region of the ribosomal large subunit suitable for screening, quantifying, and sequencing. We evaluated this primer pair in silico on sequences from all known genera, in vitro with pure cultures covering 16 of the 20 known genera, and on environmental samples with highly diverse microbiomes. The amplified region allowed phylogenetic differentiation of all known genera and most species. The amplicon is about 350 bp long, suitable for short-read high-throughput sequencing as well as qPCR assays. Sequencing of herbivore fecal samples verified the specificity of the primer pair and recovered highly diverse and so far unknown anaerobic gut fungal taxa. As the chosen barcoding region can be easily aligned and is taxonomically informative, the sequences can be used for classification and phylogenetic inferences. Several new Neocallimastigomycetes clades were obtained, some of which represent putative novel lineages such as a clade from feces of the rodent Dolichotis patagonum (mara).
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Affiliation(s)
- Diana Young
- Micro and Molecular Biology, Central Department for Quality Assurance and Analytics, Bavarian State Research Center for Agriculture, 85354 Freising, Germany
| | - Akshay Joshi
- Biocatalysis, Environment and Process Technology Unit, Life Science and Facility Management, ZHAW, 8820 Wadenswil, Switzerland
- Department of Microbiology, University of Innsbruck, A-6020 Innsbruck, Austria
| | - Liren Huang
- Center for Biotechnology (CeBiTec), University of Bielefeld, 33615 Bielefeld, Germany
| | - Bernhard Munk
- Chair of Urban Water Systems Engineering, Technical University of Munich (TUM), 85748 Garching, Germany
| | - Christian Wurzbacher
- Chair of Urban Water Systems Engineering, Technical University of Munich (TUM), 85748 Garching, Germany
| | - Noha H. Youssef
- Department of Microbiology and Molecular Genetics (OSU), Oklahoma State University, Stillwater, OK 74074, USA
| | - Mostafa S. Elshahed
- Department of Microbiology and Molecular Genetics (OSU), Oklahoma State University, Stillwater, OK 74074, USA
| | - Christina D. Moon
- AgResearch, Grasslands Research Centre, Palmerston North 4442, New Zealand
| | - Katrin Ochsenreither
- Process Engineering in Life Sciences 2: Technical Biology (KIT), Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| | - Gareth W. Griffith
- Department of Life Sciences (DoLS), Aberystwyth University, Aberystwyth SY23 3DD, Wales, UK
| | | | - Alexander Sczyrba
- Center for Biotechnology (CeBiTec), University of Bielefeld, 33615 Bielefeld, Germany
| | - Michael Lebuhn
- Micro and Molecular Biology, Central Department for Quality Assurance and Analytics, Bavarian State Research Center for Agriculture, 85354 Freising, Germany
| | - Veronika Flad
- Micro and Molecular Biology, Central Department for Quality Assurance and Analytics, Bavarian State Research Center for Agriculture, 85354 Freising, Germany
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González-Martínez A, Muñoz-Palazon B, Kruglova A, Vilpanen M, Kuokkanen A, Mikola A, Heinonen M. Performance and microbial community structure of a full-scale ANITA TMMox bioreactor for treating reject water located in Finland. CHEMOSPHERE 2021; 271:129526. [PMID: 33445025 DOI: 10.1016/j.chemosphere.2020.129526] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 12/04/2020] [Accepted: 12/28/2020] [Indexed: 06/12/2023]
Abstract
The aim of this work was to study the operational performance and the microbial community dynamics during the start-up of ANITATMMox technology implemented at full-scale wastewater treatment plant in Finland to treat reject water from anaerobic digesters. The average ammonium removal in the studied setup reached around 90%, withstanding ammonium loads up to 0.13 g N m-2h-1. The nitrite concentration in the effluent did not exceed 10 mg L-1, and there was a slight accumulation of NO3--N during the operation which was controlled. Thus, the result showed a robust success to high ammonium loading in presence of organic matter. The sequencing showed a heterogeneous microbial population where Methanosaeta, WCHA1-57 genus, Sphingobacteriia, Chlorobia and diverse unknown fungi were found as dominant phylotypes. Moreover, members of the Brocadiaceae family were dominant in the adhered biomass, mostly represented by Candidatus Scalindua, rarely reported in WWTPs. Overall, the results demonstrated a drastic effect of region-specific operational conditions on carrier biofilm microbial communities as it was demonstrated by the microbial studies.
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Affiliation(s)
- A González-Martínez
- Department of Microbiology, Campus Universitario de la Cartuja C.P. 18071 University of Granada, Spain; Institute of Water Research, C.P. 18071 University of Granada, Spain
| | - B Muñoz-Palazon
- Department of Microbiology, Campus Universitario de la Cartuja C.P. 18071 University of Granada, Spain; Institute of Water Research, C.P. 18071 University of Granada, Spain.
| | - A Kruglova
- Aalto University, P.O. Box 15200, FI-00076 AALTO, Tietotie 1E, Espoo, Finland
| | - M Vilpanen
- Helsinki Region Environmental Services Authority, FI-00066 HSY, Helsinki, Finland
| | - A Kuokkanen
- Helsinki Region Environmental Services Authority, FI-00066 HSY, Helsinki, Finland
| | - A Mikola
- Aalto University, P.O. Box 15200, FI-00076 AALTO, Tietotie 1E, Espoo, Finland
| | - M Heinonen
- Helsinki Region Environmental Services Authority, FI-00066 HSY, Helsinki, Finland
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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: 3] [Impact Index Per Article: 1.0] [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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Chen W, Wang M, Gong Y, Deng Q, Zheng M, Chen S, Wan X, Yang C, Huang F. The unconventional adverse effects of fungal pretreatment on iturin A fermentation by Bacillus amyloliquefaciens CX-20. Microb Biotechnol 2020; 14:587-599. [PMID: 32997385 PMCID: PMC7936297 DOI: 10.1111/1751-7915.13658] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 08/10/2020] [Accepted: 08/11/2020] [Indexed: 11/29/2022] Open
Abstract
Fungal pretreatment is the most common strategy for improving the conversion of rapeseed meal (RSM) into value-added microbial products. It was demonstrated that Bacillus amyloliquefaciens CX-20 could directly use RSM as the sole source of all nutrients except the carbon source for iturin A fermentation with high productivity. However, whether fungal pretreatment has an impact on iturin A production is still unknown. In this study, the effects of fungal pretreatment and direct bio-utilization of RSM for iturin A fermentation were comparatively analysed through screening suitable fungal species, and evaluating the relationships between iturin A production and the composition of solid fermented RSM and liquid hydrolysates. Three main unconventional adverse effects were identified. (1) Solid-state fermentation by fungi resulted in a decrease of the total nitrogen for B. amyloliquefaciens CX-20 growth and metabolism, which caused nitrogen waste from RSM. (2) The released free ammonium nitrogen in liquid hydrolysates by fungal pretreatment led to the reduction of iturin A. (3) The insoluble precipitates of hydrolysates, which were mostly ignored and wasted in previous studies, were found to have beneficial effects on producing iturin A. In conclusion, our study verifies the unconventional adverse effects of fungal pretreatment on iturin A production by B. amyloliquefaciens CX-20 compared with direct bio-utilization of RSM.
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Affiliation(s)
- Wenchao Chen
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China.,Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan, 430062, China.,Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Wuhan, 430062, China.,Hubei Key Laboratory of Lipid Chemistry and Nutrition, Wuhan, 430062, China
| | - Meng Wang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Yangmin Gong
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China.,Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan, 430062, China.,Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Wuhan, 430062, China.,Hubei Key Laboratory of Lipid Chemistry and Nutrition, Wuhan, 430062, China
| | - Qianchun Deng
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China.,Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan, 430062, China.,Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Wuhan, 430062, China.,Hubei Key Laboratory of Lipid Chemistry and Nutrition, Wuhan, 430062, China
| | - Mingming Zheng
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China.,Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan, 430062, China.,Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Wuhan, 430062, China.,Hubei Key Laboratory of Lipid Chemistry and Nutrition, Wuhan, 430062, China
| | - Shouwen Chen
- Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Environmental Microbial Technology Center of Hubei Province, College of Life Sciences, Hubei University, Wuhan, 430062, China
| | - Xia Wan
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China.,Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan, 430062, China.,Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Wuhan, 430062, China.,Hubei Key Laboratory of Lipid Chemistry and Nutrition, Wuhan, 430062, China
| | - Chen Yang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China.,Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan, 430062, China.,Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Wuhan, 430062, China.,Hubei Key Laboratory of Lipid Chemistry and Nutrition, Wuhan, 430062, China
| | - Fenghong Huang
- Oil Crops Research Institute, Chinese Academy of Agricultural Sciences, Wuhan, 430062, China.,Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan, 430062, China.,Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory, Wuhan, 430062, China.,Hubei Key Laboratory of Lipid Chemistry and Nutrition, Wuhan, 430062, China
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7
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Maus I, Klocke M, Derenkó J, Stolze Y, Beckstette M, Jost C, Wibberg D, Blom J, Henke C, Willenbücher K, Rumming M, Rademacher A, Pühler A, Sczyrba A, Schlüter A. Impact of process temperature and organic loading rate on cellulolytic / hydrolytic biofilm microbiomes during biomethanation of ryegrass silage revealed by genome-centered metagenomics and metatranscriptomics. ENVIRONMENTAL MICROBIOME 2020; 15:7. [PMID: 33902713 PMCID: PMC8067321 DOI: 10.1186/s40793-020-00354-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 02/14/2020] [Indexed: 05/16/2023]
Abstract
BACKGROUND Anaerobic digestion (AD) of protein-rich grass silage was performed in experimental two-stage two-phase biogas reactor systems at low vs. increased organic loading rates (OLRs) under mesophilic (37 °C) and thermophilic (55 °C) temperatures. To follow the adaptive response of the biomass-attached cellulolytic/hydrolytic biofilms at increasing ammonium/ammonia contents, genome-centered metagenomics and transcriptional profiling based on metagenome assembled genomes (MAGs) were conducted. RESULTS In total, 78 bacterial and archaeal MAGs representing the most abundant members of the communities, and featuring defined quality criteria were selected and characterized in detail. Determination of MAG abundances under the tested conditions by mapping of the obtained metagenome sequence reads to the MAGs revealed that MAG abundance profiles were mainly shaped by the temperature but also by the OLR. However, the OLR effect was more pronounced for the mesophilic systems as compared to the thermophilic ones. In contrast, metatranscriptome mapping to MAGs subsequently normalized to MAG abundances showed that under thermophilic conditions, MAGs respond to increased OLRs by shifting their transcriptional activities mainly without adjusting their proliferation rates. This is a clear difference compared to the behavior of the microbiome under mesophilic conditions. Here, the response to increased OLRs involved adjusting of proliferation rates and corresponding transcriptional activities. The analysis led to the identification of MAGs positively responding to increased OLRs. The most outstanding MAGs in this regard, obviously well adapted to higher OLRs and/or associated conditions, were assigned to the order Clostridiales (Acetivibrio sp.) for the mesophilic biofilm and the orders Bacteroidales (Prevotella sp. and an unknown species), Lachnospirales (Herbinix sp. and Kineothrix sp.) and Clostridiales (Clostridium sp.) for the thermophilic biofilm. Genome-based metabolic reconstruction and transcriptional profiling revealed that positively responding MAGs mainly are involved in hydrolysis of grass silage, acidogenesis and / or acetogenesis. CONCLUSIONS An integrated -omics approach enabled the identification of new AD biofilm keystone species featuring outstanding performance under stress conditions such as increased OLRs. Genome-based knowledge on the metabolic potential and transcriptional activity of responsive microbiome members will contribute to the development of improved microbiological AD management strategies for biomethanation of renewable biomass.
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Affiliation(s)
- Irena Maus
- Bielefeld University, Center for Biotechnology (CeBiTec), Genome Research of Industrial Microorganisms, Universitätsstr. 27, 33615 Bielefeld, Germany
| | - Michael Klocke
- Department Bioengineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Max-Eyth-Allee 100, 14469 Potsdam, Germany
| | - Jaqueline Derenkó
- Department Bioengineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Max-Eyth-Allee 100, 14469 Potsdam, Germany
| | - Yvonne Stolze
- Bielefeld University, Center for Biotechnology (CeBiTec), Genome Research of Industrial Microorganisms, Universitätsstr. 27, 33615 Bielefeld, Germany
| | - Michael Beckstette
- Helmholtz Centre for Infection Research, Microbial Infection Biology / Experimental Immunology, Inhoffenstrasse 7, 38124 Braunschweig, Germany
| | - Carsten Jost
- Department Bioengineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Max-Eyth-Allee 100, 14469 Potsdam, Germany
| | - Daniel Wibberg
- Bielefeld University, Center for Biotechnology (CeBiTec), Genome Research of Industrial Microorganisms, Universitätsstr. 27, 33615 Bielefeld, Germany
| | - Jochen Blom
- Department Bioinformatics and Systems Biology, Justus-Liebig University Gießen, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
| | - Christian Henke
- Faculty of Technology, Bielefeld University, Universitätsstr. 25, 33615 Bielefeld, Germany
| | - Katharina Willenbücher
- Department Bioengineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Max-Eyth-Allee 100, 14469 Potsdam, Germany
| | - Madis Rumming
- Faculty of Technology, Bielefeld University, Universitätsstr. 25, 33615 Bielefeld, Germany
| | - Antje Rademacher
- Department Bioengineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Max-Eyth-Allee 100, 14469 Potsdam, Germany
| | - Alfred Pühler
- Bielefeld University, Center for Biotechnology (CeBiTec), Genome Research of Industrial Microorganisms, Universitätsstr. 27, 33615 Bielefeld, Germany
| | - Alexander Sczyrba
- Bielefeld University, Center for Biotechnology (CeBiTec), Genome Research of Industrial Microorganisms, Universitätsstr. 27, 33615 Bielefeld, Germany
- Faculty of Technology, Bielefeld University, Universitätsstr. 25, 33615 Bielefeld, Germany
| | - Andreas Schlüter
- Bielefeld University, Center for Biotechnology (CeBiTec), Genome Research of Industrial Microorganisms, Universitätsstr. 27, 33615 Bielefeld, Germany
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8
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Utilization of Food and Agricultural Residues for a Flexible Biogas Production: Process Stability and Effects on Needed Biogas Storage Capacities. ENERGIES 2019. [DOI: 10.3390/en12142678] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Biogas plants can contribute to future energy systems’ stability through flexible power generation. To provide power flexibly, a demand-oriented biogas supply is necessary, which may be ensured by applying flexible feeding strategies. In this study, the impacts of applying three different feeding strategies (1x, 3x and 9x feeding per day) on the biogas and methane production and process stability parameters were determined for a biogas plant with a focus on waste treatment. Two feedstocks that differed in (1) high fat and (2) higher carbohydrate content were investigated during semi-continuous fermentation tests. Measurements of the short chain fatty acids concentration, pH value, TVA/TIC ratio and total ammonium and ammonia content along with a molecular biology analysis were conducted to assess the effects on process stability. The results show that flexible biogas production can be obtained without negative impacts on the process performance and that production peaks in biogas and methane can be significantly shifted to another time by changing feeding intervals. Implementing the fermentation tests’ results into a biogas plant simulation model and an assessment of power generation scenarios focusing on peak-time power generation revealed a considerable reduction potential for the needed biogas storage capacity of up to 73.7%.
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9
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Chen SC, Weng CY, Lai MC, Tamaki H, Narihiro T. Comparative genomic analyses reveal trehalose synthase genes as the signature in genus Methanoculleus. Mar Genomics 2019; 47:100673. [PMID: 30935830 DOI: 10.1016/j.margen.2019.03.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 03/19/2019] [Accepted: 03/24/2019] [Indexed: 11/25/2022]
Abstract
To date, the only methanoarchaea isolated directly from methane hydrate bearing sediments were Methanoculleus submarinus Nankai-1T and Methanoculleus sp. MH98A. Here, we provide the genome of Methanoculleus taiwanensis CYW4T isolated from the deep-sea subseafloor sediment at the Deformation Front offshore southwestern Taiwan, where methane hydrate deposits are likely located. Through comparative genomics analyses of nine Methanoculleus strains from various habitats, 2-3 coding genes for trehalose synthases were found in all nine Methanoculleus genomes, which were not detected in other methanogens and are therefore suggested as a signature of genus Methanoculleus among methane-producing archaea. In addition, the structural genes adjacent to trehalose synthase genes are comprised of the signaling module of Per-Arnt-Sim (PAS) domain-containing proteins, Hsp20 family proteins, arabinose efflux permeases and multiple surface proteins with fasciclin-like (FAS) repeat. This indicates that trehalose synthase gene clusters in Methanoculleus might play roles in the response to various stresses and regulate carbon storage and modification of surface proteins through accumulation of trehalose. The non-gas hydrate-associated Methanoculleus strains harbor carbon-monoxide dehydrogenase (cooS/acsA) genes, which are important for the conversion of acetate to methane at the step of CO oxidation/CO2 reduction in acetoclastic methanogens and further implies that these strains may be able to utilize CO for methanogenesis in their natural habitats. In addition, both genomes of M. bourgensis strains MS2T and MAB1 harbor highly abundant transposase genes, which may be disseminated from microbial communities in their habitats, sewage treatment plants and biogas reactors, which are breeding grounds for antibiotic resistance. Through comparative genomic analyses, we gained insight into understanding the life of strictly anaerobic methane-producing archaea in various habitats, especially in methane-based deep-sea ecosystems.
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Affiliation(s)
- Sheng-Chung Chen
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Chieh-Yin Weng
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Mei-Chin Lai
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan; Agricultural Biotechnology Center, National Chung Hsing University, Taichung, Taiwan.
| | - Hideyuki Tamaki
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - Takashi Narihiro
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
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10
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Kong D, Zhang K, Liang J, Gao W, Du L. Methanogenic community during the anaerobic digestion of different substrates and organic loading rates. Microbiologyopen 2018; 8:e00709. [PMID: 30112808 PMCID: PMC6528610 DOI: 10.1002/mbo3.709] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 05/27/2018] [Accepted: 07/09/2018] [Indexed: 11/25/2022] Open
Abstract
Three anaerobic reactors using pig manure (PM), maize straw (MS), and a mixture of the two as substrates were compared for archaeal community structure and diversity, and for methanogens response to increased organic loading rate (OLR, expressed in the mass of volatile solid (VS)). Methanogenic archaeal richness during codigestion of pig manure with maize straw (ACE: 2412) was greater than that during the others (ACE: 1225, 1467) at an OLR of 4 g L−1 day−1, accompanied by high specific methane yield. Euryarchaeota and Crenarchaeota predominated during overall digestion of different substrates; with relative abundances of 63.5%–99.0% and 1.0%–36.3%, respectively. Methanosarcina was the predominant genus that accounted for 33.7%–79.8% of the archaeal community. The diversity in the PM digester decreased with increase in OLR, but increased in the MS digester. The diversity was stable during the codigestion with increased OLR. The relative abundances of hydrogenotrophic methanogens increased by 2.6 and 2.1 folds; the methanogenic community shifted from acetoclastic to hydrogenotrophic methanogens during digestion of MS, and of the mixture of MS and PM. Canonical correspondence analysis revealed a strong relationship between reactor parameters and methanogenic community.
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Affiliation(s)
- Dewang Kong
- Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, China.,College of Land and Environment, Shenyang Agricultural University, Shenyang, China
| | - Keqiang Zhang
- Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, China
| | - Junfeng Liang
- Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, China
| | - Wenxuan Gao
- Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, China
| | - Lianzhu Du
- Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin, China
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Piątek M, Lisowski A, Lisowska B. Application of titration methods for measuring the contents of ammonium nitrogen and volatile fatty acids in agricultural biogas plants. J Biotechnol 2017; 264:38-42. [DOI: 10.1016/j.jbiotec.2017.10.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Revised: 10/05/2017] [Accepted: 10/12/2017] [Indexed: 11/28/2022]
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12
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Kovacs KL. Biogas Science 2016. Anaerobe 2017; 46:1-2. [PMID: 28890221 DOI: 10.1016/j.anaerobe.2017.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kornel L Kovacs
- Department of Biotechnology, University of Szeged, Közép fasor 52, Szeged 6726, Hungary.
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