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Prakash O, Mostafa A, Im S, Kang S, Shi X, Kim DH. Upflow anaerobic sludge blanket reactor operation under high pressure for energy-rich biogas production. BIORESOURCE TECHNOLOGY 2023; 376:128897. [PMID: 36931446 DOI: 10.1016/j.biortech.2023.128897] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/10/2023] [Accepted: 03/11/2023] [Indexed: 06/18/2023]
Abstract
Autogenerative high-pressure digestion has an advantage of producing CH4-rich biogas directly from the reactor. However, its continuous operation has rarely been reported, and has never been attempted in an upflow anaerobic sludge blanket reactor (UASB). Here, UASB was continuously operated at 10 g COD/L/d with increasing pressure from 1 to 8 bar. As the pressure increased, the CH4 content in the biogas increased gradually, reaching 96.7 ± 0.8% at 8 bar (309 MJ/m3 biogas). The pH was dropped from 8.2 to 7.2 with pressure increase, but COD removal efficiency was maintained > 90%. The high pressure up to 8 bar did not adversely impact the physicochemical properties of granules, which was due to the increased production of extracellular polymeric substances (EPS), particularly, tightly bound EPS (34% increase). With pressure increase, there was no changes in the microbial community and ATPase gene expression, but 41% increase in carbonic anhydrase gene expression was observed.
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Affiliation(s)
- Om Prakash
- Department of Smart-City Engineering, Inha University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea
| | - Alsayed Mostafa
- Department of Smart-City Engineering, Inha University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea
| | - Seongwon Im
- Department of Smart-City Engineering, Inha University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea
| | - Seoktae Kang
- Department of Civil and Environmental Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Xueqing Shi
- School of Environmental and Municipal Engineering, Qingdao University of Technology, 11 Fushun Road, Qingdao 266033, PR China
| | - Dong-Hoon Kim
- Department of Smart-City Engineering, Inha University, 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea.
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Thapa A, Park JH, Shin SG, Jo HM, Kim MS, Park Y, Han U, Cho SK. Elucidation of microbial interactions, dynamics, and keystone microbes in high pressure anaerobic digestion. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:159718. [PMID: 36302429 DOI: 10.1016/j.scitotenv.2022.159718] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/12/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
High-pressure anaerobic digestion (HPAD) is a promising technology for producing biogas enriched with high methane content in a single-step process. To enhance HPAD performance, a comprehensive understanding of microbial community dynamics and their interactions is essential. For this, mesophilic batch high-pressurized anaerobic reactors were operated under 3 bars (H3) and 6 bars (H6). The experimental results showed that the effect of high-pressure (up to 6 bar) on acidification was negligible while methanogenesis was significantly delayed. Microbial analysis showed the predominance of Defluviitoga affiliated with the phylum Thermotogae and the reduction of Thiopseudomonas under high-pressure conditions. In addition, the microbial cluster pattern in H3 and H6 was significantly different compared to the CR, indicating a clear shift in microbial community structure. Moreover, Methanobacterium, Methanomicrobiaceae, Alkaliphilus, and Petrimonas were strongly correlated in network analysis, and they could be identified as keystone microbes in the HPAD reactor.
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Affiliation(s)
- Ajay Thapa
- Department of Biological and Environmental Science, Dongguk University, 32 Dongguk-ro, Ilsandong-gu, Goyang, Gyeonggi-do, Republic of Korea
| | - Jeong-Hoon Park
- Sustainable Technology and Wellness R&D Group, Korea Institute of Industrial Technology (KITECH), Jeju-si, Republic of Korea
| | - Seung Gu Shin
- Department of Energy System Engineering, Gyeongang National University, Gyeongnam 52725, Republic of Korea
| | - Hong-Mok Jo
- Department of Biological and Environmental Science, Dongguk University, 32 Dongguk-ro, Ilsandong-gu, Goyang, Gyeonggi-do, Republic of Korea
| | - Min-Sang Kim
- Department of Biological and Environmental Science, Dongguk University, 32 Dongguk-ro, Ilsandong-gu, Goyang, Gyeonggi-do, Republic of Korea
| | - Yeongmi Park
- Department of Biological and Environmental Science, Dongguk University, 32 Dongguk-ro, Ilsandong-gu, Goyang, Gyeonggi-do, Republic of Korea
| | - Uijeong Han
- Department of Biological and Environmental Science, Dongguk University, 32 Dongguk-ro, Ilsandong-gu, Goyang, Gyeonggi-do, Republic of Korea
| | - Si-Kyung Cho
- Department of Biological and Environmental Science, Dongguk University, 32 Dongguk-ro, Ilsandong-gu, Goyang, Gyeonggi-do, Republic of Korea.
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Saeid Hosseini S, Azadi Tabar M, F. J. Vankelecom I, F. M. Denayer J. Progress in High Performance Membrane Materials and Processes for Biogas Production, Upgrading and Conversion. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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De Crescenzo C, Marzocchella A, Karatza D, Molino A, Ceron-Chafla P, Lindeboom REF, van Lier JB, Chianese S, Musmarra D. Modelling of autogenerative high-pressure anaerobic digestion in a batch reactor for the production of pressurised biogas. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2022; 15:20. [PMID: 35418101 PMCID: PMC8857836 DOI: 10.1186/s13068-022-02117-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 02/02/2022] [Indexed: 11/15/2022]
Abstract
Background Pressurised anaerobic digestion allows the production of biogas with a high content of methane and, at the same time, avoid the energy costs for the biogas upgrading and injection into the distribution grid. The technology carries potential, but the research faces practical constraints by a.o. the capital investment needed in high-pressure reactors and sensors and associated sampling limitations. In this work, the kinetic model of an autogenerative high-pressure anaerobic digestion of acetate, as the representative compound of the aceticlastic methanogenesis route, in batch configuration, is proposed to predict the dynamic performance of pressurised digesters and support future experimental work. The modelling of autogenerative high-pressure anaerobic digestion in batch configuration, which is not extensively studied and simulated in the present literature, was developed, calibrated, and validated by using experimental results available from the literature. Results Under high-pressure conditions, the assessment of the Monod maximum specific uptake rate, the half-saturation constant and the first-order decay rate was carried out, and the values of 5.9 kg COD kg COD−1 d−1, 0.05 kg COD m−3 and 0.02 d−1 were determined, respectively. By using the predicted values, excellent fittings of the final pressure, the CH4 molar fraction and the specific methanogenic yield calculation were obtained. Likewise, the variation in the gas–liquid mass transfer coefficient by several orders of magnitude showed negligible effects on the model predictive values in terms of methane molar fraction of the produced biogas, while the final pressure seemed to be slightly influenced. Conclusions The proposed model allowed to estimate the Monod maximum specific uptake rate for acetate, the half-saturation rate for acetate and the first-order decay rate constant, which were comparable with literature values reported for well-studied methanogens under anaerobic digestion at atmospheric pressure. The methane molar fraction and the final pressure predicted by the model showed different responses towards the variation of the gas–liquid mass transfer coefficient since the former seemed not to be affected by the variation of the gas–liquid mass transfer coefficient; in contrast, the final pressure seemed to be slightly influenced. The proposed approach may also allow to potentially identify the methanogens species able to be predominant at high pressure.
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Affiliation(s)
- Carmen De Crescenzo
- Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma 29, 81031, Aversa, Italy
| | - Antonia Marzocchella
- Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma 29, 81031, Aversa, Italy
| | - Despina Karatza
- Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma 29, 81031, Aversa, Italy
| | - Antonio Molino
- Department of Sustainability, ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, CR Portici Piazzale Enrico Fermi, 1, 80055, Portici, NA, Italy
| | - Pamela Ceron-Chafla
- Sanitary Engineering Section, Faculty of Civil Engineering and Geosciences, Department of Water Management, Delft University of Technology, Stevinweg 1, 2628 CN, Delft, Netherlands
| | - Ralph E F Lindeboom
- Sanitary Engineering Section, Faculty of Civil Engineering and Geosciences, Department of Water Management, Delft University of Technology, Stevinweg 1, 2628 CN, Delft, Netherlands
| | - Jules B van Lier
- Sanitary Engineering Section, Faculty of Civil Engineering and Geosciences, Department of Water Management, Delft University of Technology, Stevinweg 1, 2628 CN, Delft, Netherlands
| | - Simeone Chianese
- Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma 29, 81031, Aversa, Italy.
| | - Dino Musmarra
- Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma 29, 81031, Aversa, Italy
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He W, Zhang L, Liu H, Zhang Y, Fu B, Zhang X, Jiang Q. CO 2 sequestration mediated by wollastonite in anaerobic digestion of sewage sludge: From sequence batch to semi-continuous operation. CHEMOSPHERE 2022; 287:132095. [PMID: 34537456 DOI: 10.1016/j.chemosphere.2021.132095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 08/21/2021] [Accepted: 08/28/2021] [Indexed: 06/13/2023]
Abstract
This study investigated the mechanisms involved in CO2 sequestration under the sequence batch and semi-continuous operation using wollastonite in sludge anaerobic digestion. Wollastonite substantially elevated CH4 content in biogas and played a role in CO2 capture. It increased biogas yield of the glucose due to pH buffering effect but did not increase that of the hydrolysate from thermal alkali pretreated sludge. Under the semi-continuous operation, wollastonite improved the CO2 sequestration, but decreased the biogas yield from 166 to 24 mL/g soluble chemical oxygen demand, since seemingly wollastonite residues inhibited microbes in the sludge. However, the use of dialysis bags to wrap wollastonite offset the negative impact of the wollastonite residues in the sludge, thereby increased biogas yield. The present study is conducive to understanding the mechanisms involved in and proving the feasibility of the CO2 sequestration using wollastonite in sludge anaerobic digestion and its impacts on long-term operation. Consequently, the findings of the study provide key parameters and useful guidelines for scaling up and wollastonite application in anaerobic digestion of sewage sludge.
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Affiliation(s)
- Wanying He
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi, 214122, China
| | - Lihui Zhang
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi, 214122, China
| | - He Liu
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi, 214122, China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi, 214122, China; Jiangsu Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou, 215011, China.
| | - Yan Zhang
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi, 214122, China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi, 214122, China; Jiangsu Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou, 215011, China
| | - Bo Fu
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi, 214122, China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi, 214122, China; Jiangsu Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou, 215011, China
| | - Xuedong Zhang
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi, 214122, China; Jiangsu Key Laboratory of Anaerobic Biotechnology, Wuxi, 214122, China
| | - Qian Jiang
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi, 214122, China
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Zhao J, Li Y, Dong R. Recent progress towards in-situ biogas upgrading technologies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 800:149667. [PMID: 34426339 DOI: 10.1016/j.scitotenv.2021.149667] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 08/10/2021] [Accepted: 08/10/2021] [Indexed: 06/13/2023]
Affiliation(s)
- Jing Zhao
- Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands.
| | - Yu Li
- College of Engineering, China Agricultural University, Qinghuadonglu No.17, 100083 Beijing, China.
| | - Renjie Dong
- College of Engineering, China Agricultural University, Qinghuadonglu No.17, 100083 Beijing, China.
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Postawa K, Szczygieł J, Wrzesińska-Jędrusiak E, Klimek K, Kułażyński M. The pump-mixed anaerobic digestion of pig slurry: new technology and mathematical modeling. WASTE MANAGEMENT (NEW YORK, N.Y.) 2021; 123:111-119. [PMID: 33581640 DOI: 10.1016/j.wasman.2021.01.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 12/14/2020] [Accepted: 01/07/2021] [Indexed: 06/12/2023]
Abstract
Biogas production is a relatively novel and developing branch of the renewable fuel sector, which allows agricultural waste, and more, to be used as a feedstock. New technologies have been integrated into the process to improve its efficiency. In this study, a pump-mixed anaerobic digestion concept is considered for both experimental and modeling approaches. The experiment included a total of nine configurations with the same geometry (140 dm3 of total reactor volume) but different hydraulic retention times and mixing intervals. The measurements were used to create and optimize a mathematical model. The complete-stirring assumption, which underlies most anaerobic digestion (AD) simulations, is no longer valid in this case. Thus, the novel concept is developed by assuming that the liquid phase is split into three separate sections, which approximates the concentration gradient in a real reactor. This method allows partial differential equations to be avoided, which could potentially affect the calculation efficiency. The final mean accuracy of the model in the tested range was estimated to be 86.60% while, in selected parts of the scope, was close to 90%. The pump-mixed anaerobic digestion technique in the experiment achieved high production performance (above 8 dm3 of product per 1 dm3 of feedstock) while maintaining a high methane content (approximately 65%). The comparison between the reactor stirred by an impeller, and the pump-mixed, indicated that the proposed configuration ensures better production stability. Additionally, it was possible to achieve a higher biogas production rate with the same feedstock concentration.
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Affiliation(s)
- Karol Postawa
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
| | - Jerzy Szczygieł
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Edyta Wrzesińska-Jędrusiak
- Department of Renewable Energy Sources, Institute of Technology and Life Sciences, Falenty, Al. Hrabska 3, 05-090 Raszyn, Poland
| | - Kamila Klimek
- Department of Applied Mathematics and Informatics, University of Life Sciences in Lublin, Gleboka 28, 20-612 Lublin, Poland
| | - Marek Kułażyński
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
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Postawa K, Szczygieł J, Kułażyński M. Innovations in anaerobic digestion: a model-based study. BIOTECHNOLOGY FOR BIOFUELS 2021; 14:19. [PMID: 33436022 PMCID: PMC7805208 DOI: 10.1186/s13068-020-01864-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 12/21/2020] [Indexed: 06/12/2023]
Abstract
BACKGROUND Increasing the efficiency of the biogas production process is possible by modifying the technological installations of the biogas plant. In this study, specific solutions based on a mathematical model that lead to favorable results were proposed. Three configurations were considered: classical anaerobic digestion (AD) and its two modifications, two-phase AD (TPAD) and autogenerative high-pressure digestion (AHPD). The model has been validated based on measurements from a biogas plant located in Poland. Afterward, the TPAD and AHPD concepts were numerically tested for the same volume and feeding conditions. RESULTS The TPAD system increased the overall biogas production from 9.06 to 9.59%, depending on the feedstock composition, while the content of methane was slightly lower in the whole production chain. On the other hand, the AHPD provided the best purity of the produced fuel, in which a methane content value of 82.13% was reached. At the same time, the overpressure leads to a decrease of around 7.5% in the volumetric production efficiency. The study indicated that the dilution of maize silage with pig manure, instead of water, can have significant benefits in the selected configurations. The content of pig slurry strengthens the impact of the selected process modifications-in the first case, by increasing the production efficiency, and in the second, by improving the methane content in the biogas. CONCLUSIONS The proposed mathematical model of the AD process proved to be a valuable tool for the description and design of biogas plant. The analysis shows that the overall impact of the presented process modifications is mutually opposite. The feedstock composition has a moderate and unsteady impact on the production profile, in the tested modifications. The dilution with pig manure, instead of water, leads to a slightly better efficiency in the classical configuration. For the TPAD process, the trend is very similar, but the AHPD biogas plant indicates a reverse tendency. Overall, the recommendation from this article is to use the AHPD concept if the composition of the biogas is the most important. In the case in which the performance is the most important factor, it is favorable to use the TPAD configuration.
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Affiliation(s)
- Karol Postawa
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeż Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Jerzy Szczygieł
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeż Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Marek Kułażyński
- Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeż Wyspiańskiego 27, 50-370 Wrocław, Poland
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Zhao J, Li Y, Marandola C, Krooneman J, Euverink GJW. Comparison of the microbial communities in anaerobic digesters treating high alkalinity synthetic wastewater at atmospheric and high-pressure (11 bar). BIORESOURCE TECHNOLOGY 2020; 318:124101. [PMID: 32947140 DOI: 10.1016/j.biortech.2020.124101] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 09/01/2020] [Accepted: 09/03/2020] [Indexed: 06/11/2023]
Abstract
High-pressure anaerobic digestion is an appealing concept since it can upgrade biogas directly within the reactor. However, the decline of pH caused by the dissolution of CO2 is the main barrier that prevents a good operating high-pressure anaerobic digestion process. Therefore, in this study, a high-pressure anaerobic digestion was studied to treat high alkalinity synthetic wastewater, which could not be treated in a normal-pressure anaerobic digester. In the high-pressure reactor, the pH value was 7.5 ~ 7.8, and the CH4 content reached 88% at 11 bar. Unlike its normal-pressure counterpart (2285 mg/L acetic acid), the high-pressure reactor ran steadily (without volatile fatty acids inhibition). Furthermore, the microbial community changed in the high-pressure reactor. Specifically, key microbial guilds (Syntrophus (11.2%), Methanosaeta concilii (50.9%), and Methanobrevibacter (26.8%)) were dominant in the high-pressure reactor at 11 bar, indicating their fundamental roles under high-pressure treating high alkalinity synthetic wastewater.
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Affiliation(s)
- Jing Zhao
- Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Yu Li
- Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Clara Marandola
- Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Janneke Krooneman
- Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands; Carbohydrate Competence Center, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Gert Jan Willem Euverink
- Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands; Carbohydrate Competence Center, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
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Differences of methanogenesis between mesophilic and thermophilic in situ biogas-upgrading systems by hydrogen addition. ACTA ACUST UNITED AC 2019; 46:1569-1581. [DOI: 10.1007/s10295-019-02219-w] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 07/11/2019] [Indexed: 11/25/2022]
Abstract
Abstract
To investigate the differences in microbial community structure between mesophilic and thermophilic in situ biogas-upgrading systems by H2 addition, two reactors (35 °C and 55 °C) were run for four stages according to different H2 addition rates (H2/CO2 of 0:1, 1:1, and 4:1) and mixing mode (intermittent and continuous). 16S rRNA gene-sequencing technology was applied to analyze microbial community structure. The results showed that the temperature is a crucial factor in impacting succession of microbial community structure and the H2 utilization pathway. For mesophilic digestion, most of added H2 was consumed indirectly by the combination of homoacetogens and strict aceticlastic methanogens. In the thermophilic system, most of added H2 may be used for microbial cell growth, and part of H2 was utilized directly by strict hydrogenotrophic methanogens and facultative aceticlastic methanogens. Continuous stirring was harmful to the stabilization of mesophilic system, but not to the thermophilic one.
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11
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Latif MA, Mehta CM, Batstone DJ. Enhancing soluble phosphate concentration in sludge liquor by pressurised anaerobic digestion. WATER RESEARCH 2018; 145:660-666. [PMID: 30205337 DOI: 10.1016/j.watres.2018.08.069] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 08/29/2018] [Accepted: 08/30/2018] [Indexed: 06/08/2023]
Abstract
Recovery of phosphate from wastewater is challenging, with one of the best opportunities being recovery from sludge anaerobic digestion liquor, as struvite. However, this is limited by the proportion of total phosphorous which is soluble, due to in-digester metal ion precipitation. High-pressure anaerobic digestion may enable enhanced phosphate solubility (and hence recovery potential), without the use of added acid, due to an increased liquid phase CO2 concentration. This was tested at 2, 4, and 6 bar absolute (bara) vs a 1 bara control reactor, fed with activated sludge. Increased pressure significantly (p = 0.0008), increased the fraction of phosphate that was soluble, ranging from 52% at 1 bara, to 75% at 6 bara. Model based analysis indicated that the main reason for increased solubility was pH depression (down to 6.4 at 6 bara), rather than changes in ion pairing (with carbonates) or increases in ionic activity. However, biological performance was adversely impacted, with a substantial loss in VS and COD destruction (on the order of 5%-10% absolute). No organic acid accumulation was observed. Bacterial and archaeal communities were significantly impacted (p∼0.0003-0.0005), with a shift to specific organisms, including Bacteroidales Rikenellaceae within the bacteria, and a Deep Sea Euryarchaeotal Group at 2 bara, and Methanocellaceae within the archaea at 4 and 6 bara. The work indicates that high-pressure operation is a technically viable option to improve phosphate recovery, and produce a high-methane biogas product, but that the loss of overall conversion needs to be further addressed, possibly through two-stage digestion.
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Affiliation(s)
- Muhammad A Latif
- Griffith School of Engineering and Build Environment, 170 Kessels Road, Griffith University, Nathan, Queensland, 4111, Australia; Advanced Water Management Centre (AWMC), Level 4, Gehrmann Bldg. (60), Research Road, University of Queensland, Brisbane, Queensland, 4072, Australia.
| | - Chirag M Mehta
- Advanced Water Management Centre (AWMC), Level 4, Gehrmann Bldg. (60), Research Road, University of Queensland, Brisbane, Queensland, 4072, Australia
| | - Damien J Batstone
- Advanced Water Management Centre (AWMC), Level 4, Gehrmann Bldg. (60), Research Road, University of Queensland, Brisbane, Queensland, 4072, Australia.
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Li Y, Liu H, Yan F, Su D, Wang Y, Zhou H. High-calorific biogas production from anaerobic digestion of food waste using a two-phase pressurized biofilm (TPPB) system. BIORESOURCE TECHNOLOGY 2017; 224:56-62. [PMID: 27815042 DOI: 10.1016/j.biortech.2016.10.070] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 10/20/2016] [Accepted: 10/23/2016] [Indexed: 05/22/2023]
Abstract
To obtain high calorific biogas via anaerobic digestion without additional upgrading equipment, a two-phase pressurized biofilm system was built up, including a conventional continuously stirred tank reactor and a pressurized biofilm anaerobic reactor (PBAR). Four different pressure levels (0.3, 0.6, 1.0 and 1.7MPa) were applied to the PBAR in sequence, with the organic loading rate maintained at 3.1g-COD/L/d. Biogas production, gas composition, process stability parameters were measured. Results showed that with the pressure increasing from 0.3MPa to 1.7MPa, the pH value decreased from 7.22±0.19 to 6.98±0.05, the COD removal decreased from 93.0±0.9% to 79.7±1.2% and the methane content increased from 80.5±1.5% to 90.8±0.8%. Biogas with higher calorific value of 36.2MJ/m3 was obtained at a pressure of 1.7MPa. Pressure showed a significant effect on biogas production and gas quality in methanogenesis reactor.
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Affiliation(s)
- Yeqing Li
- Institute of New Energy, State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Biogas Upgrading Utilization, China University of Petroleum Beijing (CUPB), Beijing 102249, PR China.
| | - Hong Liu
- Institute of New Energy, State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Biogas Upgrading Utilization, China University of Petroleum Beijing (CUPB), Beijing 102249, PR China
| | - Fang Yan
- Institute of New Energy, State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Biogas Upgrading Utilization, China University of Petroleum Beijing (CUPB), Beijing 102249, PR China
| | - Dongfang Su
- Institute of New Energy, State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Biogas Upgrading Utilization, China University of Petroleum Beijing (CUPB), Beijing 102249, PR China
| | - Yafei Wang
- Institute of New Energy, State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Biogas Upgrading Utilization, China University of Petroleum Beijing (CUPB), Beijing 102249, PR China
| | - Hongjun Zhou
- Institute of New Energy, State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Biogas Upgrading Utilization, China University of Petroleum Beijing (CUPB), Beijing 102249, PR China
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Wang H, Zhang Y, Angelidaki I. Ammonia inhibition on hydrogen enriched anaerobic digestion of manure under mesophilic and thermophilic conditions. WATER RESEARCH 2016; 105:314-319. [PMID: 27639056 DOI: 10.1016/j.watres.2016.09.006] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Revised: 09/06/2016] [Accepted: 09/06/2016] [Indexed: 06/06/2023]
Abstract
Capturing of carbon dioxide by hydrogen derived from excess renewable energy (e.g., wind mills) to methane in a microbially catalyzed process offers an attractive technology for biogas production and upgrading. This bioconversion process is catalyzed by hydrogenotrophic methanogens, which are known to be sensitive to ammonia. In this study, the tolerance of the biogas process under supply of hydrogen, to ammonia toxicity was studied under mesophilic and thermophilic conditions. When the initial hydrogen partial pressure was 0.5 atm, the methane yield at high ammonia load (7 g NH4+-N L-1) was 41.0% and 22.3% lower than that at low ammonia load (1 g NH4+-N L-1) in mesophilic and thermophilic condition, respectively. Meanwhile no significant effect on the biogas composition was observed. Moreover, we found that hydrogentrophic methanogens were more tolerant to the ammonia toxicity than acetoclastic methanogens in the hydrogen enriched biogas production and upgrading processes. The highest methane production yield was achieved under 0.5 atm hydrogen partial pressure in batch reactors at all the tested ammonia levels. Furthermore, the thermophilic methanogens at 0.5 atm of hydrogen partial pressure were more tolerant to high ammonia levels (≥5 g NH4+-N L-1), compared with mesophilic methanogens. The present study offers insight in developing resistant hydrogen enriched biogas production and upgrading processes treating ammonia-rich waste streams.
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Affiliation(s)
- Han Wang
- Department of Environmental Engineering, Technical University of Denmark, Miljoevej B113, DK 2800, Kgs Lyngby, Denmark
| | - Yifeng Zhang
- Department of Environmental Engineering, Technical University of Denmark, Miljoevej B113, DK 2800, Kgs Lyngby, Denmark.
| | - Irini Angelidaki
- Department of Environmental Engineering, Technical University of Denmark, Miljoevej B113, DK 2800, Kgs Lyngby, Denmark
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Valero D, Montes JA, Rico JL, Rico C. Influence of headspace pressure on methane production in Biochemical Methane Potential (BMP) tests. WASTE MANAGEMENT (NEW YORK, N.Y.) 2016; 48:193-198. [PMID: 26598214 DOI: 10.1016/j.wasman.2015.11.012] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Revised: 10/29/2015] [Accepted: 11/07/2015] [Indexed: 06/05/2023]
Abstract
The biochemical methane potential test is the most commonly applied method to determine methane production from organic wastes. One of the parameters measured is the volume of biogas produced which can be determined manometrically by keeping the volume constant and measuring increases in pressure. In the present study, the effect of pressure accumulation in the headspace of the reactors has been studied. Triplicate batch trials employing cocoa shell, waste coffee grounds and dairy manure as substrates have been performed under two headspace pressure conditions. The results obtained in the study showed that headspace overpressures higher than 600mbar affected methane production for waste coffee grounds. On the contrary, headspace overpressures within a range of 600-1000mbar did not affect methane production for cocoa shell and dairy manure. With the analyses performed in the present work it has not been possible to determine the reasons for the lower methane yield value obtained for the waste coffee grounds under high headspace pressures.
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Affiliation(s)
- David Valero
- Department of Water and Environmental Science and Technologies, University of Cantabria, Avda. Los Castros, s/n, 39005 Santander, Spain
| | - Jesús A Montes
- Department of Water and Environmental Science and Technologies, University of Cantabria, Avda. Los Castros, s/n, 39005 Santander, Spain
| | - José Luis Rico
- Department of Chemical and Process Engineering Resources, University of Cantabria, Avda. Los Castros, s/n, 39005 Santander, Spain
| | - Carlos Rico
- Department of Water and Environmental Science and Technologies, University of Cantabria, Avda. Los Castros, s/n, 39005 Santander, Spain.
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Lindeboom REF, Shin SG, Weijma J, van Lier JB, Plugge CM. Piezo-tolerant natural gas-producing microbes under accumulating pCO 2. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:236. [PMID: 27826355 PMCID: PMC5097443 DOI: 10.1186/s13068-016-0634-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Accepted: 10/06/2016] [Indexed: 05/13/2023]
Abstract
BACKGROUND It is known that a part of natural gas is produced by biogenic degradation of organic matter, but the microbial pathways resulting in the formation of pressurized gas fields remain unknown. Autogeneration of biogas pressure of up to 20 bar has been shown to improve the quality of biogas to the level of biogenic natural gas as the fraction of CO2 decreased. Still, the pCO2 is higher compared to atmospheric digestion and this may affect the process in several ways. In this work, we investigated the effect of elevated pCO2 of up to 0.5 MPa on Gibbs free energy, microbial community composition and substrate utilization kinetics in autogenerative high-pressure digestion. RESULTS In this study, biogas pressure (up to 2.0 MPa) was batch-wise autogenerated for 268 days at 303 K in an 8-L bioreactor, resulting in a population dominated by archaeal Methanosaeta concilii, Methanobacterium formicicum and Mtb. beijingense and bacterial Kosmotoga-like (31% of total bacterial species), Propioniferax-like (25%) and Treponema-like (12%) species. Related microorganisms have also been detected in gas, oil and abandoned coal-bed reservoirs, where elevated pressure prevails. After 107 days autogeneration of biogas pressure up to 0.50 MPa of pCO2, propionate accumulated whilst CH4 formation declined. Alongside the Propioniferax-like organism, a putative propionate producer, increased in relative abundance in the period of propionate accumulation. Complementary experiments showed that specific propionate conversion rates decreased linearly from 30.3 mg g-1 VSadded day-1 by more than 90% to 2.2 mg g-1 VSadded day-1 after elevating pCO2 from 0.10 to 0.50 MPa. Neither thermodynamic limitations, especially due to elevated pH2, nor pH inhibition could sufficiently explain this phenomenon. The reduced propionate conversion could therefore be attributed to reversible CO2-toxicity. CONCLUSIONS The results of this study suggest a generic role of the detected bacterial and archaeal species in biogenic methane formation at elevated pressure. The propionate conversion rate and subsequent methane production rate were inhibited by up to 90% by the accumulating pCO2 up to 0.5 MPa in the pressure reactor, which opens opportunities for steering carboxylate production using reversible CO2-toxicity in mixed-culture microbial electrosynthesis and fermentation.Graphical abstractThe role of pCO2 in steering product formation in autogenerative high pressure digestion.
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Affiliation(s)
- Ralph E. F. Lindeboom
- Sub-Department of Environmental Technology, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands
- Section Sanitary Engineering, Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5048, 2600 GA Delft, The Netherlands
| | - Seung Gu Shin
- Sub-Department of Environmental Technology, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands
- Section Sanitary Engineering, Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5048, 2600 GA Delft, The Netherlands
- School of Environmental Science and Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang, Gyeongbuk 37673 South Korea
| | - Jan Weijma
- Sub-Department of Environmental Technology, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands
| | - Jules B. van Lier
- Section Sanitary Engineering, Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5048, 2600 GA Delft, The Netherlands
| | - Caroline M. Plugge
- Laboratory of Microbiology, Wageningen University, Stippeneng 4, 6708 WE Wageningen, The Netherlands
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Holmes D, Smith J. Biologically Produced Methane as a Renewable Energy Source. ADVANCES IN APPLIED MICROBIOLOGY 2016; 97:1-61. [PMID: 27926429 DOI: 10.1016/bs.aambs.2016.09.001] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Methanogens are a unique group of strictly anaerobic archaea that are more metabolically diverse than previously thought. Traditionally, it was thought that methanogens could only generate methane by coupling the oxidation of products formed by fermentative bacteria with the reduction of CO2. However, it has recently been observed that many methanogens can also use electrons extruded from metal-respiring bacteria, biocathodes, or insoluble electron shuttles as energy sources. Methanogens are found in both human-made and natural environments and are responsible for the production of ∼71% of the global atmospheric methane. Their habitats range from the human digestive tract to hydrothermal vents. Although biologically produced methane can negatively impact the environment if released into the atmosphere, when captured, it can serve as a potent fuel source. The anaerobic digestion of wastes such as animal manure, human sewage, or food waste produces biogas which is composed of ∼60% methane. Methane from biogas can be cleaned to yield purified methane (biomethane) that can be readily incorporated into natural gas pipelines making it a promising renewable energy source. Conventional anaerobic digestion is limited by long retention times, low organics removal efficiencies, and low biogas production rates. Therefore, many studies are being conducted to improve the anaerobic digestion process. Researchers have found that addition of conductive materials and/or electrically active cathodes to anaerobic digesters can stimulate the digestion process and increase methane content of biogas. It is hoped that optimization of anaerobic digesters will make biogas more readily accessible to the average person.
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Jabłoński S, Rodowicz P, Łukaszewicz M. Methanogenic archaea database containing physiological and biochemical characteristics. Int J Syst Evol Microbiol 2015; 65:1360-1368. [PMID: 25604335 DOI: 10.1099/ijs.0.000065] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The methanogenic archaea are a group of micro-organisms that have developed a unique metabolic pathway for obtaining energy. There are 150 characterized species in this group; however, novel species continue to be discovered. Since methanogens are considered a crucial part of the carbon cycle in the anaerobic ecosystem, characterization of these micro-organisms is important for understanding anaerobic ecology. A methanogens database (MDB; http://metanogen.biotech.uni.wroc.pl/), including physiological and biochemical characteristics of methanogens, was constructed based on the descriptions of isolated type strains. Analysis of the data revealed that methanogens are able to grow from 0 to 122 °C. Methanogens growing at the same temperature may have very different growth rates. There is no clear correlation between the optimal growth temperature and the DNA G+C content. The following substrate preferences are observed in the database: 74.5% of archaea species utilize H2+CO2, 33% utilize methyl compounds and 8.5% utilize acetate. Utilization of methyl compounds (mainly micro-organisms belonging to the genera Methanosarcina and Methanolobus ) is seldom accompanied by an ability to utilize H2+CO2. Very often, data for described species are incomplete, especially substrate preferences. Additional research leading to completion of missing information and development of standards, especially for substrate utilization, would be very helpful.
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Affiliation(s)
| | - Paweł Rodowicz
- Department of Information, Wrocław University of Technology, Wrocław, Poland.,Faculty of Biotechnology, University of Wrocław, Wrocław, Poland
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Bo T, Zhu X, Zhang L, Tao Y, He X, Li D, Yan Z. A new upgraded biogas production process: Coupling microbial electrolysis cell and anaerobic digestion in single-chamber, barrel-shape stainless steel reactor. Electrochem commun 2014. [DOI: 10.1016/j.elecom.2014.05.026] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Lindeboom REF, Ferrer I, Weijma J, van Lier JB. Effect of substrate and cation requirement on anaerobic volatile fatty acid conversion rates at elevated biogas pressure. BIORESOURCE TECHNOLOGY 2013; 150:60-6. [PMID: 24152787 DOI: 10.1016/j.biortech.2013.09.100] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 09/19/2013] [Accepted: 09/22/2013] [Indexed: 05/24/2023]
Abstract
This work studied the anaerobic conversion of neutralized volatile fatty acids (VFA) into biogas under Autogenerative High Pressure Digestion (AHPD) conditions. The effects of the operating conditions on the biogas quality, and the substrate utilisation rates were evaluated using 3 AHPD reactors (0.6 L); feeding a concentration of acetate and VFA (1-10 g COD/L) corresponding to an expected pressure increase of 1-20 bar. The biogas composition improved with pressure up to 4.5 bar (>93% CH4), and stabilized at 10 and 20 bar. Both, acetotrophic and hydrogenotrophic methanogenic activity was observed. Substrate utilisation rates of 0.2, 0.1 and 0.1 g CODCH4/g VSS/d for acetate, propionate and butyrate were found to decrease by up to 50% with increasing final pressure. Most likely increased Na(+)-requirement to achieve CO2 sequestration at higher pressure rather than end-product inhibition was responsible.
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Affiliation(s)
- Ralph E F Lindeboom
- Sub-Department of Environmental Technology, Wageningen University, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands.
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Lindeboom REF, Ferrer I, Weijma J, van Lier JB. Silicate minerals for CO2 scavenging from biogas in Autogenerative High Pressure Digestion. WATER RESEARCH 2013; 47:3742-51. [PMID: 23726711 DOI: 10.1016/j.watres.2013.04.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 04/04/2013] [Accepted: 04/07/2013] [Indexed: 05/15/2023]
Abstract
Autogenerative High Pressure Digestion (AHPD) is a novel concept that integrates gas upgrading with anaerobic digestion by selective dissolution of CO2 at elevated biogas pressure. However, accumulation of CO2 and fatty acids after anaerobic digestion of glucose resulted in pH 3-5, which is incompatible with the commonly applied high-rate methanogenic processes. Therefore, we studied the use of wollastonite, olivine and anorthosite, with measured composition of CaSi1.05O3.4, Mg2Fe0.2Ni0.01Si1.2O5.3 and Na0.7Ca1K0.1Mg0.1Fe0.15Al3.1Si4O24, respectively, to scavenge CO2 during batch AHPD of glucose. Depending on the glucose to mineral ratio the pH increased to 6.0-7.5. Experiments with wollastonite showed that Ca(2+)-leaching was caused by volatile fatty acid (VFA) production during glucose digestion. At 1, 3 and 9 bar, the CH4 content reached 74%, 86% and 88%, respectively, indicating CO2 scavenging. Fixation of produced CO2 by CaCO3 precipitation in the sludge was confirmed by Fourier Transferred-InfraRed, Combined Field emission Scanning Electron Microscopy-Energy-dispersive X-ray spectroscopy and Thermogravimetric Analysis-Mass Spectroscopy.
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Affiliation(s)
- Ralph E F Lindeboom
- Sub-Department of Environmental Technology, Wageningen University, Wageningen, The Netherlands.
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Hollow fiber membrane based H2 diffusion for efficient in situ biogas upgrading in an anaerobic reactor. Appl Microbiol Biotechnol 2013; 97:3739-44. [DOI: 10.1007/s00253-013-4811-3] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 02/21/2013] [Accepted: 02/22/2013] [Indexed: 12/15/2022]
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Luo G, Angelidaki I. Co-digestion of manure and whey for in situ biogas upgrading by the addition of H2: process performance and microbial insights. Appl Microbiol Biotechnol 2012; 97:1373-81. [DOI: 10.1007/s00253-012-4547-5] [Citation(s) in RCA: 168] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2012] [Revised: 10/22/2012] [Accepted: 10/23/2012] [Indexed: 11/29/2022]
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Abstract
Anaerobic digestion is a widely applied technology to produce biogas from organic wastewater. The biogas calorific value depends on the methane-content. For biogas flows >100 m3/h, the two-step process is usually used for production of high calorific biogas from organic wastewater: the first step, anaerobic digestion; the second step, biogas purification. However, for biogas flows 3/h, biogas purification is not economical, and one-step process according to the big gap between methane and non-methane-gas in solubility at higher pressure or lower temperature, should be condidered. New anaerobic digestion processes, such as micro-aerobic process, electrolysis enhancing methane production process, process of internal circulation anaerobic digester (ICAD) with sewage source heat pump, may all enhance biogas producton or lower biogas production cost. In addition, suitable environmental conditions, such as organic loading rate (OLR), solid retention time (SRT), hydraulic retention time (HRT) and surface area, are all beneficial to enhance methane fermentation. Furthermore, new operation modes and optimal dose of trace metals might be selected.
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