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Baruah M, Gogoi M, Chandra Boro R, Barooah M. Priestia aryabhattai MBM3-Mediated Enhancement of Sulphur Metabolism in Brassica campestris. Curr Microbiol 2024; 81:316. [PMID: 39164526 DOI: 10.1007/s00284-024-03844-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Accepted: 08/13/2024] [Indexed: 08/22/2024]
Abstract
Sulphur, an essential element for plant growth, is vital for synthesizing various crucial components such as amino acids and enzymes. Its limited availability in acidic soil inhibits crop development and yield. Our research identified low pH tolerance sulphur-metabolizing bacterial isolate Priestia aryabhattai MBM3, with plant growth-promoting traits. Key sulphur-metabolizing genes viz., cysK, cysE, luxS, and a hypothetical gene, BG04-4883 were increasingly upregulated during the lag phase in acidic environments, indicating to the isolates ability to accumulate sulphur through increased activity of these essential genes. Microcosm experiment revealed bioprimed Brassica campestris L seeds with Priestia aryabhattai MBM3 had improved performance in acidic conditions, as demonstrated by agronomic and physiological, and no metabolic demand for sulphur, unlike control untreated plants which showed requirement for sulphur with significant expression of sulfate transporters, as revealed by molecular studies.
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Affiliation(s)
- Manjistha Baruah
- DBT-North East Centre for Agricultural Biotechnology, Assam Agricultural University, Jorhat, Assam, 785013, India
- Department of Agricultural Biotechnology, Assam Agricultural University, Jorhat, Assam, 785013, India
| | - Manuranjan Gogoi
- Department of Tea Husbandry and Technology, Assam Agricultural University, Jorhat, Assam, 785013, India
| | - Robin Chandra Boro
- Department of Agricultural Biotechnology, Assam Agricultural University, Jorhat, Assam, 785013, India
| | - Madhumita Barooah
- DBT-North East Centre for Agricultural Biotechnology, Assam Agricultural University, Jorhat, Assam, 785013, India.
- Department of Agricultural Biotechnology, Assam Agricultural University, Jorhat, Assam, 785013, India.
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2
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François M, Lin KS, Rachmadona N, Khoo KS. Advancement of biochar-aided with iron chloride for contaminants removal from wastewater and biogas production: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 874:162437. [PMID: 36858210 DOI: 10.1016/j.scitotenv.2023.162437] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/16/2023] [Accepted: 02/20/2023] [Indexed: 06/18/2023]
Abstract
The use of fossil fuels, emission of greenhouse gases (GHG) into the atmosphere, and waste pose a problem to the environment and public health that urgently needs to be dealt with. Among numerous chemical activating agents that can be added to anaerobic digestion (AD) to enhance nutrient removal and increase the quality and quantity of biomethane, iron chloride (FeCl3) is the one that has the lowest cost and is the most environmentally friendly. This state-of-the-art review aims to revise the influence of FeCl3 on the Brunauer-Emmett-Teller (BET) surface area of biochar and its ability to increase methane (CH4) yield and remove contaminants from biogas and wastewater. The novelty of the study is that FeCl3, an activating agent, can increase the BET surface area of biochar, and its efficacy increases when combined with zinc chloride or phosphoric acid. Regarding the removal of contaminants from wastewater and biogas, FeCl3 has proven to be an effective coagulant, reducing the chemical oxygen demand (COD) of wastewater and hydrogen sulfide in biogas. The performance of FeCl3 depends on the dosage, pH, and feedstock used. Therefore, FeCl3 can increase the BET surface area of biochar and CH4 yield and remove contaminants from wastewater and biogas. More research is needed to investigate the ability of FeCl3 to remove water vapor and carbon dioxide during biogas production while accounting for a set of other parameters, including FeCl3 size.
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Affiliation(s)
- Mathurin François
- Department of Chemical Engineering and Materials Science/Environmental Technology Research Center, Yuan Ze University, Chung-Li District, Taoyuan City 32003, Taiwan; Environmental Technology Research Center, Yuan Ze University, Chung-Li District, Taoyuan City 32003, Taiwan
| | - Kuen-Song Lin
- Department of Chemical Engineering and Materials Science/Environmental Technology Research Center, Yuan Ze University, Chung-Li District, Taoyuan City 32003, Taiwan; Environmental Technology Research Center, Yuan Ze University, Chung-Li District, Taoyuan City 32003, Taiwan.
| | - Nova Rachmadona
- Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Padjadjaran, Jatinangor, West Java 45363, Indonesia; Research Collaboration Center for Biomass and Biorefinery between BRIN and Universitas Padjadjaran, Jatinangor, West Java 45363, Indonesia
| | - Kuan Shiong Khoo
- Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan, Taiwan..
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3
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Zhang C, Lu Q, Li Y. A review on sulfur transformation during anaerobic digestion of organic solid waste: Mechanisms, influencing factors and resource recovery. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 865:161193. [PMID: 36581268 DOI: 10.1016/j.scitotenv.2022.161193] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 12/20/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
Anaerobic digestion (AD) is an economical and environment-friendly technology for treating organic solid wastes (OSWs). OSWs with high sulfur can lead to the accumulation of toxic and harmful hydrogen sulfide (H2S) during AD, so a considerable amount of studies have focused on removing H2S emissions. However, current studies have found that sulfide induces phosphate release from the sludge containing iron‑phosphorus compounds (FePs) and the feasibility of recovering elemental sulfur (S0) during AD. To tap the full potential of sulfur in OSWs resource recovery, deciphering the sulfur transformation pathway and its influencing factors is required. Therefore, in this review, the sulfur species and distributions in OSWs and the pathway of sulfur transformation during AD were systematically summarized. Then, the relationship between iron (ferric compounds and zero-valent iron), phosphorus (FePs) and sulfur were analyzed. It was found that the reaction of iron with sulfide during AD drove the conversion of sulfide to S0 and iron sulfide compounds (FeSx), and consequently iron was applied in sulfide abatement. In particular, ferric (hydr)oxide granules offer possibilities to improve the economic viability of hydrogen sulfide control by recovering S0. Sulfide is an interesting strategy to release phosphate from the sludge containing FePs for phosphorus recovery. Critical factors affecting sulfur transformation, including the carbon source, free ammonia and pretreatment methods, were summarized and discussed. Carbon source and free ammonia affected sulfur-related microbial diversity and enzyme activity and different sulfur transformation pathways in response to varying pretreatment methods. The study on S0 recovery, organic sulfur conversion, and phosphate release mechanism triggered by sulfur deserves further investigation. This review is expected to enrich our knowledge of the role of sulfur during AD and inspire new ideas for recovering phosphorus and sulfur resources from OSWs.
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Affiliation(s)
- Cong Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
| | - Qinyuan Lu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
| | - Yongmei Li
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
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4
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Effects of Stepwise Temperature Shifts in Anaerobic Digestion for Treating Municipal Wastewater Sludge: A Genomic Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19095728. [PMID: 35565123 PMCID: PMC9099789 DOI: 10.3390/ijerph19095728] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 05/06/2022] [Accepted: 05/06/2022] [Indexed: 11/29/2022]
Abstract
In wastewater treatment plants (WWTP), anaerobic digester (AD) units are commonly operated under mesophilic and thermophilic conditions. In some cases, during the dry season, maintaining a stable temperature in the digester requires additional power to operate a conditioning system. Without proper conditioning systems, methanogens are vulnerable to temperature shifts. This study investigated the effects of temperature shifts on CH4 gas production and microbial diversity during anaerobic digestion of anaerobic sewage sludge using a metagenomic approach. The research was conducted in lab-scale AD under stepwise upshifted temperature from 42 to 48 °C. The results showed that significant methanogen population reduction during the temperature shift affected the CH4 production. With 70 days of incubation each, CH4 production decreased from 4.55 L·g−1-chemical oxygen demand (COD) at 42 °C with methanogen/total population (M·TP−1) ratio of 0.041 to 1.52 L·g−1 COD (M·TP−1 ratio 0.027) and then to 0.94 L·g−1 COD ( M·TP−1 ratio 0.026) after the temperature was shifted to 45 °C and 48 °C, respectively. Methanosaeta was the most prevalent methanogen during the thermal change. This finding suggests that the Methanosaeta genus was a thermotolerant archaea. Anaerobaculum, Fervidobacterium, and Tepidanaerobacter were bacterial genera and grew well in shifted-up temperatures, implying heat-resistant characteristics.
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5
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Bellucci M, Borruso L, Piergiacomo F, Brusetti L, Beneduce L. The effect of substituting energy crop with agricultural waste on the dynamics of bacterial communities in a two-stage anaerobic digester. CHEMOSPHERE 2022; 294:133776. [PMID: 35093420 DOI: 10.1016/j.chemosphere.2022.133776] [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: 11/15/2021] [Revised: 01/04/2022] [Accepted: 01/25/2022] [Indexed: 06/14/2023]
Abstract
The replacement of energy crops with agricultural waste in biogas production through anaerobic digestion (AD) is both an environmentally sustainable and economically profitable strategy. However, the change of feeding mix in AD might result in nutrient imbalance or increase of the ammonium concentration, negatively affecting the activity of the microbes responsible for the process. In the present study the structure and dynamics of the bacterial communities of a full-scale two-stage AD plant, composed of a hydrolysis/acidogenesis (H) and an acetogenesis/methanogenesis (M) tanks, was monitored during feedstock substitution. Energy crop (triticale) was replaced by poultry manure litter and olive mill pomace. The increase percentage of poultry manure litter (up to 8.6%) and olive mill pomace (up to 30.5%) in the recipe incremented the total solids (up to 21% in H) and, consequently, the nitrogen content in the digestate (6.7 g N/kg in the solid fraction in H and 4-5 g NH4+-N/L in the liquid fraction). This favored the growth of Lactococcus sp. with consequent increment of lactate production (∼ 1 mg L-1 last two days of the survey) and the establishment of Weissella and Lactobacillus spp. Syntrophic acetate-oxidizers, including Syntrophaceticus (6% ± 1.7%), were detected manly in M but were negatively affected by the addition of the poultry manure litter, while the sulfate-reducing bacteria correlated with the variations of the volatile fatty acids. Planctomycetes putatively capable of anammox process were also found in the H during the first two days of the survey and accounted for 0.3 ± 0.01% of the total bacterial community. The stability of the process during feedstock change is the result of the shift of bacterial populations of different functional groups that showed peculiar adaptation patterns in the two stages of the plant.
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Affiliation(s)
- M Bellucci
- Istituto Superiore per la Protezione e la Ricerca Ambientale (ISPRA), Rome, 00144, Italy
| | - L Borruso
- Faculty of Science and Technology, Free University of Bolzano-Bozen, Piazza Università 1, 39100, Bolzano-Bozen, Italy
| | - F Piergiacomo
- Faculty of Science and Technology, Free University of Bolzano-Bozen, Piazza Università 1, 39100, Bolzano-Bozen, Italy
| | - L Brusetti
- Faculty of Science and Technology, Free University of Bolzano-Bozen, Piazza Università 1, 39100, Bolzano-Bozen, Italy
| | - L Beneduce
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE), University of Foggia, Via Napoli 25, 71122, Foggia, Italy.
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6
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Weimers K, Bergstrand KJ, Hultberg M, Asp H. Liquid Anaerobic Digestate as Sole Nutrient Source in Soilless Horticulture-Or Spiked With Mineral Nutrients for Improved Plant Growth. FRONTIERS IN PLANT SCIENCE 2022; 13:770179. [PMID: 35401605 PMCID: PMC8984193 DOI: 10.3389/fpls.2022.770179] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 02/07/2022] [Indexed: 06/14/2023]
Abstract
Digestate from biogas production high in plant-available macro- and micro-nutrients could replace mineral fertilizer in protected (soilless) horticulture. Previous uses of digestate have shown that low concentrations of plant-available phosphorus (P) and sulfur (S) may be limiting factors for growth when using digestate as the sole fertilizer. In this study, digestate collected from a municipal biogas plant in Sweden was nitrified in a moving-bed biofilm reactor prior to its use as fertilizer. A greenhouse pot trial with pak choi grown in peat-based growing medium was established to assess the (i) macro- and micro-nutrient availability in the digestate, with particular focus on P and S and (ii) the effect of amending the digestate solution with nutrients considered to be lacking [P, S, magnesium (Mg), manganese (Mn), boron (B), and molybdenum (Mo)]. The results showed that plants fertilized with raw digestate suffered from S and B deficiency and early P deficiency. Supplementing the digestate with nutrients originating from mineral salts resulted in sufficient plant tissue concentrations of all elements except S. The marketable yield was similar to that achieved using standard mineral fertilizer and the dry matter yield was 17% higher. In the light of the present results, the use of nitrified digestate in soilless plant production seems like a fruitful way forward to recycle organic nutrients from waste streams. In the case where a strict organic protocol is not needed, amendment with inorganic nutrients may be a way to increase the utilization of organically derived nutrients.
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Affiliation(s)
- Kristina Weimers
- The Federation of Swedish Farmers, Horticulture (LRF Trädgård), Höör, Sweden
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Lomma, Sweden
| | - Karl-Johan Bergstrand
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Lomma, Sweden
| | - Malin Hultberg
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Lomma, Sweden
| | - Håkan Asp
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Lomma, Sweden
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7
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Alex Kibangou V, Lilly M, Busani Mpofu A, de Jonge N, Oyekola OO, Jean Welz P. Sulfate-reducing and methanogenic microbial community responses during anaerobic digestion of tannery effluent. BIORESOURCE TECHNOLOGY 2022; 347:126308. [PMID: 34767906 DOI: 10.1016/j.biortech.2021.126308] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/01/2021] [Accepted: 11/06/2021] [Indexed: 06/13/2023]
Abstract
Microbial communities were monitored in terms of structure, function and response to physicochemical variables during anaerobic digestion of tannery and associated slaughterhouse effluent in: (i) 2 L biochemical methane potential batch reactors at different inoculum to substrate ratios (2-5) and initial sulfate concentrations (665-2000 mg/L), and (ii) 20 L anaerobic sequencing batch reactors with different mixing regimes (continuous vs. intermittent). Methanogenic and sulfidogenic community compositions in the 2 L reactors evolved initially, but stabilised after the start of biogas generation, although significant (ANOSIM p < 0.05) changes in the physicochemical parameters indicated continued metabolic activity. Both hydrogenotrophic and acetoclastic archaeal genera were present in high relative abundances. Continuous stirring preferentially selected the metabolically versatile genus Methanosarcina, suggesting that higher specific methane generation in the continuously stirred system (168 vs. 19.5 mL methane per gram volatile solids per week) was related to the metabolic activities of members of this genus.
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Affiliation(s)
- Victoria Alex Kibangou
- Applied Microbial and Health Biotechnology Institute, Cape Peninsula University of Technology, Bellville Campus, Symphony Way, Cape Town 7535, South Africa; Department of Chemical Engineering, Cape Peninsula University of Technology, Bellville Campus, Symphony Way, Cape Town 7535, South Africa
| | - Mariska Lilly
- Applied Microbial and Health Biotechnology Institute, Cape Peninsula University of Technology, Bellville Campus, Symphony Way, Cape Town 7535, South Africa
| | - Ashton Busani Mpofu
- Applied Microbial and Health Biotechnology Institute, Cape Peninsula University of Technology, Bellville Campus, Symphony Way, Cape Town 7535, South Africa; Department of Chemical Engineering, Cape Peninsula University of Technology, Bellville Campus, Symphony Way, Cape Town 7535, South Africa
| | - Nadieh de Jonge
- Department of Chemistry and Bioscience, Aalborg University, Aalborg DK-9220, Denmark; NIRAS A/S, Østre Havnegade 12, Aalborg DK-9000, Denmark
| | - Oluwaseun O Oyekola
- Department of Chemical Engineering, Cape Peninsula University of Technology, Bellville Campus, Symphony Way, Cape Town 7535, South Africa
| | - Pamela Jean Welz
- Applied Microbial and Health Biotechnology Institute, Cape Peninsula University of Technology, Bellville Campus, Symphony Way, Cape Town 7535, South Africa.
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8
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Mozhiarasi V. Overview of pretreatment technologies on vegetable, fruit and flower market wastes disintegration and bioenergy potential: Indian scenario. CHEMOSPHERE 2022; 288:132604. [PMID: 34678338 DOI: 10.1016/j.chemosphere.2021.132604] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 10/11/2021] [Accepted: 10/16/2021] [Indexed: 06/13/2023]
Abstract
Disposal of segregated organic fractions of centralized wholesale market wastes (i.e. vegetable, fruit and flower markets waste) in dumpsites/landfills are not only a serious issue but also underutilizes the huge potency of these organic wastes. Anaerobic digestion (AD) is a promising technology for converting organic wastes into methane, as a carbon-neutral alternative to conventional fuels. The major challenges related to the AD process are poor biodegradation of wastes and buffering capacity within the anaerobic digester that lowers the biogas yield. To accelerate biodegradation and to enhance the process efficacy of anaerobic digestion, several pretreatment technologies (mechanical, thermal, biological, chemical and combined pre-treatments) for organic wastes prior to the AD process were developed. This review article presents a comprehensive analysis of research updates in pretreatment techniques for vegetable, fruit and flower markets wastes for enhancing biogas yields during the AD process. The technological aspects of the pretreatment process are described and their efficiency comparison with the resultant process yields and environmental benefits are also discussed. The challenges and technical issues associated with each pretreatment and future research directions for overcoming the field implementation issues are also proposed.
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Affiliation(s)
- Velusamy Mozhiarasi
- CLRI Regional Centre Jalandhar, CSIR-Central Leather Research Institute, Jalandhar, 144021, Punjab, India.
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9
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Nagarajan S, Ranade VV. Valorizing Waste Biomass via Hydrodynamic Cavitation and Anaerobic Digestion. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c03177] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Sanjay Nagarajan
- Multiphase Reactors and Intensification Group, School of Chemistry and Chemical Engineering, Queen’s University Belfast, Belfast BT9 5AG, U.K
| | - Vivek V. Ranade
- Multiphase Reactors and Intensification Group, School of Chemistry and Chemical Engineering, Queen’s University Belfast, Belfast BT9 5AG, U.K
- Bernal Institute, University of Limerick, Limerick V94T9PX, Ireland
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10
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Ferric Oxide-Containing Waterworks Sludge Reduces Emissions of Hydrogen Sulfide in Biogas Plants and the Needs for Virgin Chemicals. SUSTAINABILITY 2021. [DOI: 10.3390/su13137416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Ferric oxide-containing waterworks sludge can be used to reduce the formation of hydrogen sulfide during anaerobic digestion. The ferric compound is reduced biochemically in the digester and forms insoluble pyrite in digester sludge. Virgin ferric chloride is often used to solve the hydrogen sulfide problem. Since 2013, Sydvatten AB has supplied a growing number of digestion plants in Sweden with ferric-containing dewatered waterworks sludge derived from the drinking water treatment plant Ringsjöverket to limit the formation of hydrogen sulfide. At the waterworks, ferric chloride is added to enhance the coagulation of organic matter from the source water. The sludge formed in this process is dewatered and landfilled, but also recycled in biogas production in order to decrease the hydrogen sulfide concentration. In this study, the use of sludge for hydrogen sulfide removal in digesters was technically and economically evaluated via case studies from 13 full-scale digesters in Sweden. Compared with the use of fresh ferric chloride, the operational costs are reduced by up to 50% by using sludge. The quality of the sludge is high and its content in metals is low or very low, especially when compared with the requirements of different certification standards for biosolid reuse applied in Sweden. The addition of waterworks sludge containing iron to a digester for the removal of dissolved hydrogen sulfide is a technically and economically good alternative when producing biogas. It is also one step closer to a circular economy, as replacing the use of virgin chemicals with the by-product waterworks sludge saves energy and materials and reduces the carbon footprint of the waterworks.
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11
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Aho VTE, Tolonen T, Haverinen J, Jaakkola M, Paulin L, Auvinen P, Laine MM. Survey of microbes in industrial-scale second-generation bioethanol production for better process knowledge and operation. Appl Microbiol Biotechnol 2020; 104:8049-8064. [PMID: 32785760 DOI: 10.1007/s00253-020-10818-2] [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: 10/10/2019] [Revised: 06/30/2020] [Accepted: 08/05/2020] [Indexed: 11/24/2022]
Abstract
The microbes present in bioethanol production processes have been previously studied in laboratory-scale experiments, but there is a lack of information on full-scale industrial processes. In this study, the microbial communities of three industrial bioethanol production processes were characterized using several methods. The samples originated from second-generation bioethanol plants that produce fuel ethanol from biowaste, food industry side streams, or sawdust. Amplicon sequencing targeting bacteria, archaea, and fungi was used to explore the microbes present in biofuel production and anaerobic digestion of wastewater and sludge. Biofilm-forming lactic acid bacteria and wild yeasts were identified in fermentation samples of a full-scale plant that uses biowaste as feedstock. During the 20-month monitoring period, the anaerobic digester adapted to the bioethanol process waste with a shift in methanogen profile indicating acclimatization to high concentrations of ammonia. Amplicon sequencing does not specifically target living microbes. The same is true for indirect parameters, such as low pH, metabolites, or genes of lactic acid bacteria. Since rapid identification of living microbes would be indispensable for process management, a commercial method was tested that detects them by measuring the rRNA of selected microbial groups. Small-scale testing indicated that the method gives results comparable with plate counts and microscopic counting, especially for bacterial quantification. The applicability of the method was verified in an industrial bioethanol plant, inspecting the clean-in-place process quality and detecting viability during yeast separation. The results supported it as a fast and promising tool for monitoring microbes throughout industrial bioethanol processes.
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Affiliation(s)
- Velma T E Aho
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland.,Department of Neurology, Helsinki University Hospital, Helsinki, Finland
| | - Tiina Tolonen
- Unit of Measurement Technology, Kajaani University Consortium, University of Oulu, Kajaani, Finland
| | - Jasmiina Haverinen
- Unit of Measurement Technology, Kajaani University Consortium, University of Oulu, Kajaani, Finland
| | - Mari Jaakkola
- Unit of Measurement Technology, Kajaani University Consortium, University of Oulu, Kajaani, Finland
| | - Lars Paulin
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Petri Auvinen
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
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12
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Lackner N, Wagner AO, Illmer P. Effect of sulfate addition on carbon flow and microbial community composition during thermophilic digestion of cellulose. Appl Microbiol Biotechnol 2020; 104:4605-4615. [PMID: 32219464 PMCID: PMC7190589 DOI: 10.1007/s00253-020-10546-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 01/20/2020] [Accepted: 03/15/2020] [Indexed: 01/04/2023]
Abstract
Substrates with high sulfate levels pose problems for biogas production as they allow sulfate reducing bacteria to compete with syntrophic and methanogenic members of the community. In addition, the end product of sulfate reduction, hydrogen sulfide, is toxic and corrosive. Here we show how sulfate addition affects physiological processes in a thermophilic methanogenic system by analyzing the carbon flow and the microbial community with quantitative PCR and amplicon sequencing of the 16s rRNA gene. A sulfate addition of 0.5 to 3 g/L caused a decline in methane production by 73-92%, while higher sulfate concentrations had no additional inhibitory effect. Generally, sulfate addition induced a shift in the composition of the microbial community towards a higher dominance of Firmicutes and decreasing abundances of Bacteroidetes and Euryarchaeota. The abundance of methanogens (e.g., Methanoculleus and Methanosarcina) was reduced, while sulfate reducing bacteria (especially Candidatus Desulforudis and Desulfotomaculum) increased significantly in presence of sulfate. The sulfate addition had a significant impact on the carbon flow within the system, shifting the end product from methane and carbon dioxide to acetate and carbon dioxide. Interestingly, methane production quickly resumed, when sulfate was no longer present in the system. Despite the strong impact of sulfate addition on the carbon flow and the microbial community structure during thermophilic biogas production, short-term process disturbances caused by unexpected introduction of sulfate may be overcome due to the high resilience of the engaged microorganisms.
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Affiliation(s)
- Nina Lackner
- Department of Microbiology, Universität Innsbruck, Technikerstraße 25d, 6020, Innsbruck, Austria.
| | - Andreas O Wagner
- Department of Microbiology, Universität Innsbruck, Technikerstraße 25d, 6020, Innsbruck, Austria
| | - Paul Illmer
- Department of Microbiology, Universität Innsbruck, Technikerstraße 25d, 6020, Innsbruck, Austria
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13
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Li X, Chen S, Dong B, Dai X. New insight into the effect of thermal hydrolysis on high solid sludge anaerobic digestion: Conversion pathway of volatile sulphur compounds. CHEMOSPHERE 2020; 244:125466. [PMID: 32050325 DOI: 10.1016/j.chemosphere.2019.125466] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 11/22/2019] [Accepted: 11/24/2019] [Indexed: 06/10/2023]
Abstract
Untreated sludge (total solids = 10%) and thermally hydrolysed sludge (total solids = 10%) were subjected to high-solid anaerobic digestion (HSAD) to study the effect of thermal hydrolysis pre-treatment (THP) on the conversion pathways of volatile sulphur compounds (VSCs). Typical VSCs were detected in the gas produced by THP at 160 °C for 30 min, including H2S, methyl mercaptan (MM), dimethyl sulphide (DMS) and dimethyl disulphide (DMDS). After THP, the organic sulphide ratio in the treated sludge had decreased from 96% to 90%, and inorganic sulphide had increased from 4% to 10%. In the THS (THP + HSAD) group, the productivity and total volume of VSCs were significantly increased. These results suggest that THP directly promotes converting organic sulphur (OS) into VSCs. Further tests revealed that THP increased the activity of reductases (adenine phosphate sulphate reductase and sulphite reductase), OS hydrolysis was the main source of VSCs in biogas, and MM could be converted into H2S (78%), DMS (18%) and DMDS (4%). These findings are used to elucidate the conversion pathway of sulphides in HSAD.
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Affiliation(s)
- Xin Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, PR China.
| | - Sisi Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, PR China.
| | - Bin Dong
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, PR China.
| | - Xiaohu Dai
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, PR China.
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14
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Abstract
Bacterial communities’ composition, activity and robustness determines the effectiveness of biofiltration units for the desulfurization of biogas. It is therefore important to get a better understanding of the bacterial communities that coexist in biofiltration units under different operational conditions for the removal of H2S, the main reduced sulfur compound to eliminate in biogas. This review presents the main characteristics of sulfur-oxidizing chemotrophic bacteria that are the base of the biological transformation of H2S to innocuous products in biofilters. A survey of the existing biofiltration technologies in relation to H2S elimination is then presented followed by a review of the microbial ecology studies performed to date on biotrickling filter units for the treatment of H2S in biogas under aerobic and anoxic conditions.
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15
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Variation in the Distribution of Hydrogen Producers from the Clostridiales Order in Biogas Reactors Depending on Different Input Substrates. ENERGIES 2018. [DOI: 10.3390/en11123270] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
With growing demand for clean and cheap energy resources, biogas production is emerging as an ideal solution, as it provides relatively cheap and clean energy, while also tackling the problematic production of excessive organic waste from crops and animal agriculture. Behind this process stands a variety of anaerobic microorganisms, which turn organic substrates into valuable biogas. The biogas itself is a mixture of gases, produced mostly as metabolic byproducts of the microorganisms, such as methane, hydrogen, or carbon dioxide. Hydrogen itself figures as a potent bio-fuel, however in many bioreactors it serves as the main substrate of methanogenesis, thus potentially limiting biogas yield. With help of modern sequencing techniques, we tried to evaluate the composition in eight bioreactors using different input materials, showing shifts in the microbial consortia depending on the substrate itself. In this paper, we provide insight on the occurrence of potentially harmful microorganisms such as Clostridium novyi and Clostridium septicum, as well as key genera in hydrogen production, such as Clostridium stercorarium, Mobilitalea sp., Herbinix sp., Herbivorax sp., and Acetivibrio sp.
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16
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Hedlund FH, Madsen M. Incomplete understanding of biogas chemical hazards — Serious gas poisoning accident while unloading food waste at biogas plant. ACS CHEMICAL HEALTH & SAFETY 2018. [DOI: 10.1016/j.jchas.2018.05.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Liu ZH, Yin H, Lin Z, Dang Z. Sulfate-reducing bacteria in anaerobic bioprocesses: basic properties of pure isolates, molecular quantification, and controlling strategies. ACTA ACUST UNITED AC 2018. [DOI: 10.1080/21622515.2018.1437783] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Ze-hua Liu
- School of Environment and Energy, South China University of Technology, Guangzhou, People’s Republic of China
- Key Lab Pollution Control and Ecosystem Restoration in Industry Cluster, Ministry of Education, Guangzhou, People’s Republic of China
- Guangdong Environmental Protection Key Laboratory of Solid Waste Treatment and Recycling, Guangzhou, People’s Republic of China
- Guangdong Provincial Engineering and Technology Research Center for Environment Risk Prevention and Emergency Disposal, South China University of Technology, Guangzhou, People’s Republic of China
| | - Hua Yin
- School of Environment and Energy, South China University of Technology, Guangzhou, People’s Republic of China
| | - Zhang Lin
- School of Environment and Energy, South China University of Technology, Guangzhou, People’s Republic of China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou, People’s Republic of China
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18
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McCord AI, Stefanos SA, Tumwesige V, Lsoto D, Meding AH, Adong A, Schauer JJ, Larson RA. The impact of biogas and fuelwood use on institutional kitchen air quality in Kampala, Uganda. INDOOR AIR 2017; 27:1067-1081. [PMID: 28423205 DOI: 10.1111/ina.12390] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 04/13/2017] [Indexed: 06/07/2023]
Abstract
Experts have suggested that microscale biogas systems offer a source of renewable energy that improves indoor air quality, but such impacts have not been directly measured. This study documented cooking behaviors and measured 2.5-μm particulate matter (PM2.5 ), carbon monoxide (CO), and sulfur dioxide (SO2 ) concentrations within 14 institutional kitchens in Kampala, Uganda, that prepare meals using biogas (n=5), a mixture of biogas and fuelwood (n=3), and fuelwood (n=6). Small institutions (10-30 people) with biogas kitchens had 99% lower concentrations of PM2.5 (21 μg/m3 ) than fuelwood kitchens (3100 μg/m3 ). Larger institutions (>100 people) had biogas systems that produced insufficient gas and relied on fuelwood to meet over 90% of their energy needs. PM2.5 concentrations in these biogas-firewood kitchens were equivalent to concentrations in fuelwood kitchens. Although concentrations of hydrogen sulfide (H2 S) in biogas were as high as 2000 ppm, 75% of systems had undetectable H2 S levels (<100 ppm) in the biogas. Kitchens using biogas with high H2 S had correspondingly higher SO2 concentrations in the kitchen air. However, even the highest SO2 concentration in biogas kitchens (150 μg/m3 ) was lower than SO2 concentration in fuelwood kitchens (390 μg/m3 ). The results suggest that biogas systems can offer air quality improvements if sized properly for energy demands.
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Affiliation(s)
- A I McCord
- Nelson Institute for Environmental Studies, University of Wisconsin-Madison, Madison, WI, USA
- African Studies Program, University of Wisconsin-Madison, Madison, WI, USA
- W2E Uganda, Kampala, Uganda
| | - S A Stefanos
- Nelson Institute for Environmental Studies, University of Wisconsin-Madison, Madison, WI, USA
- W2E Uganda, Kampala, Uganda
| | - V Tumwesige
- W2E Uganda, Kampala, Uganda
- Green Heat Uganda Ltd., Kampala, Uganda
- School of Biological Sciences, University of Aberdeen, Aberdeen, UK
| | | | - A H Meding
- Nelson Institute for Environmental Studies, University of Wisconsin-Madison, Madison, WI, USA
| | | | - J J Schauer
- Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | - R A Larson
- Nelson Institute for Environmental Studies, University of Wisconsin-Madison, Madison, WI, USA
- Department of Biological Systems Engineering, University of Wisconsin-Madison, Madison, WI, USA
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19
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St-Pierre B, Wright ADG. Implications from distinct sulfate-reducing bacteria populations between cattle manure and digestate in the elucidation of H 2S production during anaerobic digestion of animal slurry. Appl Microbiol Biotechnol 2017; 101:5543-5556. [PMID: 28389712 DOI: 10.1007/s00253-017-8261-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 03/21/2017] [Accepted: 03/23/2017] [Indexed: 12/11/2022]
Abstract
Biogas produced from the anaerobic digestion of animal slurry consists mainly of methane (CH4) and carbon dioxide (CO2), but also includes other minor gases, such as hydrogen sulfide (H2S). Since it can act as a potent corrosive agent and presents a health hazard even at low concentrations, H2S is considered an undesirable by-product of anaerobic digestion. Sulfate-reducing bacteria (SRBs) have been identified as the main biological source of H2S in a number of natural, biological, and human-made habitats, and thus represent likely candidate microorganisms responsible for the production of H2S in anaerobic manure digesters. Phylogenetically, SRBs form a divergent group of bacteria that share a common anaerobic respiration pathway that allows them to use sulfate as a terminal electron acceptor. While the composition and activity of SRBs have been well documented in other environments, their metabolic potential remains largely uncharacterized and their populations poorly defined in anaerobic manure digesters. In this context, a combination of in vitro culture-based studies and DNA-based approaches, respectively, were used to gain further insight. Unexpectedly, only low to nondetectable levels of H2S were produced by digestate collected from a manure biogas plant documented to have persistently high concentrations of H2S in its biogas (2000-3000 ppm). In contrast, combining digestate with untreated manure (a substrate with comparatively lower sulfate and SRB cell densities than digestate) was found to produce elevated H2S levels in culture. While a 16S rRNA gene-based community composition approach did not reveal likely candidate SRBs in digestate or untreated manure, the use of the dsrAB gene as a phylogenetic marker provided more insight. In digestate, the predominant SRBs were found to be uncharacterized species likely belonging to the genus Desulfosporosinus (Peptococcaceae, Clostridiales, Firmicutes), while Desulfovibrio-related SRBs (Desulfovibrionaceae, Desulfovibrionales, Proteobacteria) were the most highly represented in untreated manure. Intriguingly, the same species-level OTUs with a similar pattern of opposite relative abundance were also found in two other digesters with lower H2S levels in their biogas. Together, our results suggest that elevated H2S production in anaerobic digesters requires the combination of biological and nutritional factors from both untreated manure and digestate.
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Affiliation(s)
- Benoit St-Pierre
- Department of Animal Science, South Dakota State University, Animal Science Complex, Box 2170, Brookings, SD, 57007, USA.
| | - André-Denis G Wright
- School of Animal and Comparative Biomedical Sciences, University of Arizona, 1117 E. Lowell St., Tucson, AZ, 85721, USA
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20
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Pirolli M, da Silva MLB, Mezzari MP, Michelon W, Prandini JM, Moreira Soares H. Methane production from a field-scale biofilter designed for desulfurization of biogas stream. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2016; 177:161-168. [PMID: 27093237 DOI: 10.1016/j.jenvman.2016.04.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 02/18/2016] [Accepted: 04/07/2016] [Indexed: 06/05/2023]
Abstract
The development of a simple and low maintenance field-scale biotrickling filter (BTF) for desulfurization of swine wastewater-derived biogas stream that was also capable of increasing biomethane concentrations was investigated. BTF was continuously fed with wastewater effluent from an air sparged nitrification-denitrification bioreactor installed downgradient from an UASB-type digester. BTF maximum removal efficiency (RE) of 99.8% was achieved with a maximum elimination capacity (EC) of 1,509 g H2S m(-3) h(-1). Average EC obtained with inlet biogas flow rates of 0.024, 0.036 and 0.048 m(3) h(-1) was 718, 1,013 and 438 g H2S m(-3) h(-1), respectively. SO4(-2) and S(0) were the major metabolites produced from biological conversion of H2S. Additionally to the satisfactory biodesulfurization capacity, an average increase in methane concentration of ≅ 3.8 ± 1.68 g m(-3) was measured in the filtered gas stream throughout 200 days of BTF operation. RT-PCR analyses of archaea communities in the biofilm confirmed dominance of hydrogenotrophic methanogens thus corroborating with the observed strong correlation between CO2 removal and CH4 production. Among the three major archaea orders investigated (i.e., Methanosarcinales, Methanobacteriales, and Methanomicrobiales), Methanobacteriales were encountered at highest concentrations (1.9 × 10(11) gene copies mL(-1)). The proposed BTF was robust efficiently removing H2S from biogas stream while concomitantly enhancing the concentration of valuable methane as source of renewable fuel.
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Affiliation(s)
- Mateus Pirolli
- Department of Chemical Engineering, Federal University of Santa Catarina, Florianópolis, SC 88040-900 Brazil.
| | | | - Melissa Paola Mezzari
- Biotechnology and Sciences Program, West University of Santa Catarina, Videira, SC 89560-000 Brazil.
| | - William Michelon
- Department of Chemical Engineering, Federal University of Santa Catarina, Florianópolis, SC 88040-900 Brazil.
| | - Jean Michel Prandini
- Department of Chemical Engineering, Federal University of Santa Catarina, Florianópolis, SC 88040-900 Brazil.
| | - Hugo Moreira Soares
- Department of Chemical Engineering, Federal University of Santa Catarina, Florianópolis, SC 88040-900 Brazil.
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21
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Moestedt J, Müller B, Westerholm M, Schnürer A. Ammonia threshold for inhibition of anaerobic digestion of thin stillage and the importance of organic loading rate. Microb Biotechnol 2016; 9:180-94. [PMID: 26686366 PMCID: PMC4767286 DOI: 10.1111/1751-7915.12330] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 09/24/2015] [Accepted: 09/27/2015] [Indexed: 11/03/2022] Open
Abstract
Biogas production from nitrogen-rich feedstock results in release of ammonia (NH3), causing inhibition of the microbial process. The reported threshold ammonia value for stable biogas production varies greatly between studies, probably because of differences in operating conditions. Moreover, it is often difficult to separate the effect of ammonia inhibition from that of organic loading rate (OLR), as these two factors are often interrelated. This study attempted to distinguish the effects of ammonia and OLR by analysis of two laboratory-scale biogas reactors operating with thin stillage and subjected to an increase in free ammonia (from 0.30 to 1.1 g L(-1)) either by addition of an external nitrogen source (urea) or by increasing the OLR (3.2-6.0 g volatile solids L(-1) d(-1)). The results showed that ammonia concentration was detrimental for process performance, with the threshold for stability in both processes identified as being about 1 g NH3-N L(-1), irrespective of OLR. Analysis of the methanogenic community showed limited differences between the two reactors on order level and a clear increase in the abundance of Methanomicrobiales, particularly Methanoculleus sp., in response to increasing ammonia concentration. Further comprehensive molecular analysis revealed that diverse Methanoculleus species dominated in the reactors at a given ammonia level at different OLR. The acetogenic community was clearly affected by both ammonia concentration and OLR, suggesting that the volatile fatty acid load in relation to the higher OLR was important for the dynamics of this community.
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Affiliation(s)
- Jan Moestedt
- Department of Biogas R&D, Tekniska verken i Linköping AB, Box 1500, Linköping, SE-581 15, Sweden
- Department of Microbiology, BioCenter, Swedish University of Agricultural Sciences, Box 7025, Uppsala, SE-750 07, Sweden
| | - Bettina Müller
- Department of Microbiology, BioCenter, Swedish University of Agricultural Sciences, Box 7025, Uppsala, SE-750 07, Sweden
| | - Maria Westerholm
- Department of Microbiology, BioCenter, Swedish University of Agricultural Sciences, Box 7025, Uppsala, SE-750 07, Sweden
| | - Anna Schnürer
- Department of Microbiology, BioCenter, Swedish University of Agricultural Sciences, Box 7025, Uppsala, SE-750 07, Sweden
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22
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Protocol for Start-Up and Operation of CSTR Biogas Processes. SPRINGER PROTOCOLS HANDBOOKS 2016. [DOI: 10.1007/8623_2016_214] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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23
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Beale DJ, Karpe AV, McLeod JD, Gondalia SV, Muster TH, Othman MZ, Palombo EA, Joshi D. An 'omics' approach towards the characterisation of laboratory scale anaerobic digesters treating municipal sewage sludge. WATER RESEARCH 2016; 88:346-357. [PMID: 26512813 DOI: 10.1016/j.watres.2015.10.029] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 10/12/2015] [Accepted: 10/17/2015] [Indexed: 06/05/2023]
Abstract
In this study, laboratory scale digesters were operated to simulate potential shocks to the Anaerobic Digestion (AD) process at a 350 ML/day wastewater treatment plant. The shocks included high (42 °C) and low (32 °C) temperature (either side of mesophilic 37 °C) and a 20% loading of fats, oil and grease (FOG; 20% w:v). These variables were explored at two sludge retention times (12 and 20 days) and two organic loading rates (2.0 and 2.5 kgTS/m(3)day OLR). Metagenomic and metabolomic approaches were then used to characterise the impact of operational shocks in regard to temperature and FOG addition, as determined through monitoring of biogas production, the microbial profile and their metabolism. Results showed that AD performance was not greatly affected by temperature shocks, with the biggest impact being a reduction in biogas production at 42 °C that persisted for 32 ± 1 days. The average biogas production across all digesters at the completion of the experiment was 264.1 ± 76.5 mL/day, with FOG addition observed to significantly promote biogas production (+87.8 mL/day). Metagenomic and metabolomic analyses of the digesters indicated that methanogens and methane oxidising bacteria (MOB) were low in relative abundance, and that the ratio of oxidising bacteria (methane, sulphide and sulphate) with respect to sulphate reducing bacteria (SRB) had a noticeable influence on biogas production. Furthermore, increased biogas production correlated with an increase in short chain fatty acids, a product of the addition of 20% FOG. This work demonstrates the application of metagenomics and metabolomics to characterise the microbiota and their metabolism in AD digesters, providing insight to the resilience of crucial microbial populations when exposed to operational shocks.
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Affiliation(s)
- D J Beale
- Land and Water, Commonwealth Scientific and Industrial Research Organisation, PO Box 2583, Brisbane, Queensland 4001, Australia.
| | - A V Karpe
- Land and Water, Commonwealth Scientific and Industrial Research Organisation, PO Box 2583, Brisbane, Queensland 4001, Australia; Faculty of Science, Engineering and Technology, Swinburne University of Technology, PO Box 218, Hawthorn, Victoria 3122, Australia
| | - J D McLeod
- School of Civil, Environmental and Chemical Engineering, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia
| | - S V Gondalia
- Centre for Human Psychopharmacology, Faculty of Health, Arts and Design, Swinburne University of Technology, PO Box 218, Hawthorn, Victoria 3122, Australia
| | - T H Muster
- Land and Water, Commonwealth Scientific and Industrial Research Organisation, PO Box 2583, Brisbane, Queensland 4001, Australia
| | - M Z Othman
- School of Civil, Environmental and Chemical Engineering, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia
| | - E A Palombo
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, PO Box 218, Hawthorn, Victoria 3122, Australia
| | - D Joshi
- Melbourne Water, PO Box 4342, Melbourne, Victoria 3001, Australia
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24
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Polag D, May T, Müller L, König H, Jacobi F, Laukenmann S, Keppler F. Online monitoring of stable carbon isotopes of methane in anaerobic digestion as a new tool for early warning of process instability. BIORESOURCE TECHNOLOGY 2015; 197:161-70. [PMID: 26335284 DOI: 10.1016/j.biortech.2015.08.058] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Revised: 08/08/2015] [Accepted: 08/12/2015] [Indexed: 05/16/2023]
Abstract
Effective control of anaerobic digestion in biogas plants requires the monitoring of process sensitive and rapid response parameters in order to ensure efficient biogas production and to prevent potential process failure. In this study, stable carbon isotopes of methane (δ(13)CCH4) produced in a full-scale continuous stirred-tank reactor were investigated as a potential new monitoring tool for this purpose. Over a six-month period with variable organic loading rates, δ(13)CCH4-values were measured online by a portable high-precision laser absorption spectrometer. During a stress period of consecutive high organic loading, δ(13)CCH4-values early indicated process changes in contrast to traditionally monitored parameters where a change was observed some five to ten days later. Comparison of the stable isotope values with data from microbial analyses showed a distinct relationship between the quantity of potentially acetoclastic methanogens and δ(13)CCH4-values. This finding indicates an association between dominant methanogenic pathways and carbon isotope values.
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Affiliation(s)
- D Polag
- Institute of Earth Sciences, Im Neuenheimer Feld 236, D-69120 Heidelberg, Germany
| | - T May
- Institute of Microbiology and Wine Research, Johann-Joachim-Becherweg 15, D-55128 Mainz, Germany
| | - L Müller
- Deutsches Biomasseforschungszentrum, Torgauer St. 116, D-04347 Leipzig, Germany
| | - H König
- Institute of Microbiology and Wine Research, Johann-Joachim-Becherweg 15, D-55128 Mainz, Germany
| | - F Jacobi
- Deutsches Biomasseforschungszentrum, Torgauer St. 116, D-04347 Leipzig, Germany
| | - S Laukenmann
- Institute of Earth Sciences, Im Neuenheimer Feld 236, D-69120 Heidelberg, Germany
| | - F Keppler
- Institute of Earth Sciences, Im Neuenheimer Feld 236, D-69120 Heidelberg, Germany
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25
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Suitability of different growth substrates as source of nitrogen for sulfate reducing bacteria. Biodegradation 2015; 26:415-30. [DOI: 10.1007/s10532-015-9745-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 09/05/2015] [Indexed: 11/26/2022]
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26
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Design and application of a synthetic DNA standard for real-time PCR analysis of microbial communities in a biogas digester. Appl Microbiol Biotechnol 2015; 99:6855-63. [DOI: 10.1007/s00253-015-6721-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 05/19/2015] [Accepted: 05/23/2015] [Indexed: 11/25/2022]
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27
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Comparison of operating strategies for increased biogas production from thin stillage. J Biotechnol 2014; 175:22-30. [DOI: 10.1016/j.jbiotec.2014.01.030] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Revised: 01/27/2014] [Accepted: 01/29/2014] [Indexed: 11/19/2022]
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28
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Biogas Production from Thin Stillage on an Industrial Scale—Experience and Optimisation. ENERGIES 2013. [DOI: 10.3390/en6115642] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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