1
|
Paulo LM, Liu YC, Castilla-Archilla J, Ramiro-Garcia J, Hughes D, Mahony T, Holohan BC, Wilmes P, O'Flaherty V. Full-scale study on high-rate low-temperature anaerobic digestion of agro-food wastewater: process performances and microbial community. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2024; 90:1239-1249. [PMID: 39215735 DOI: 10.2166/wst.2024.272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Accepted: 07/22/2024] [Indexed: 09/04/2024]
Abstract
The fast-growing global population has led to a substantial increase in food production, which generates large volumes of wastewater during the process. Despite most industrial wastewater being discharged at lower ambient temperatures (<20 °C), majority of the high-rate anaerobic reactors are operated at mesophilic temperatures (>30 °C). High-rate low-temperature anaerobic digestion (LtAD) has proven successful in treating industrial wastewater both at laboratory and pilot scales, boasting efficient organic removal and biogas production. In this study, we demonstrated the feasibility of two full-scale high-rate LtAD bioreactors treating meat processing and dairy wastewater, and the microbial communities in both reactors were examined. Both reactors exhibited rapid start-up, achieving considerable chemical oxygen demand (COD) removal efficiencies (total COD removal >80%) and generating high-quality biogas (CH4% in biogas >75%). Long-term operations (6-12 months) underscored the robustness of LtAD bioreactors even during winter periods (average temperature <12 °C), as evidenced by sustained high COD removal rates (total COD removal >80%). The stable performance was underpinned by a resilient microbial community comprising active acetoclastic methanogens, hydrolytic, and fermentative bacteria. These findings underscore the feasibility of high-rate low-temperature anaerobic wastewater treatment, offering promising solutions to the zero-emission wastewater treatment challenge.
Collapse
Affiliation(s)
- Lara M Paulo
- Microbial Ecology Laboratory, School of Biological and Chemical Sciences and Ryan Institute, University of Galway, Galway, H91 TK33, Ireland; Dairy Processing Technology Centre, University of Limerick, Analog Devices Building, Limerick V94 T9PX, Ireland
| | - Yu-Chen Liu
- Microbial Ecology Laboratory, School of Biological and Chemical Sciences and Ryan Institute, University of Galway, Galway, H91 TK33, Ireland
| | - Juan Castilla-Archilla
- Microbial Ecology Laboratory, School of Biological and Chemical Sciences and Ryan Institute, University of Galway, Galway, H91 TK33, Ireland; Dairy Processing Technology Centre, University of Limerick, Analog Devices Building, Limerick V94 T9PX, Ireland
| | - Javier Ramiro-Garcia
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Dermot Hughes
- Dairy Processing Technology Centre, University of Limerick, Analog Devices Building, Limerick V94 T9PX, Ireland; NVP Energy, Galway Technology Centre, Mervue Business Park, Galway, Ireland
| | - Thérèse Mahony
- Microbial Ecology Laboratory, School of Biological and Chemical Sciences and Ryan Institute, University of Galway, Galway, H91 TK33, Ireland; Dairy Processing Technology Centre, University of Limerick, Analog Devices Building, Limerick V94 T9PX, Ireland
| | - B Conall Holohan
- Microbial Ecology Laboratory, School of Biological and Chemical Sciences and Ryan Institute, University of Galway, Galway, H91 TK33, Ireland; NVP Energy, Galway Technology Centre, Mervue Business Park, Galway, Ireland; Department of Microbiology, Huygensgebouw, Radboud University, Nijmegen 6525AJ, The Netherlands
| | - Paul Wilmes
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Vincent O'Flaherty
- Microbial Ecology Laboratory, School of Biological and Chemical Sciences and Ryan Institute, University of Galway, Galway, H91 TK33, Ireland; Dairy Processing Technology Centre, University of Limerick, Analog Devices Building, Limerick V94 T9PX, Ireland E-mail:
| |
Collapse
|
2
|
Nabi M, Liang H, Cheng L, Yang W, Gao D. A comprehensive review on the use of conductive materials to improve anaerobic digestion: Focusing on landfill leachate treatment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 309:114540. [PMID: 35183937 DOI: 10.1016/j.jenvman.2022.114540] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 12/20/2021] [Accepted: 01/14/2022] [Indexed: 06/14/2023]
Abstract
Globally, around 70% of waste is disposed of in open dumps or landfill sites, with the leachate generated from these sites containing high concentrations of organic and inorganic compounds, which will adversely affect aquatic environments if discharged without proper treatment. Anaerobic digestion of landfill leachate is an environmentally-friendly method that efficiently converts organic compounds into methane-rich biogas. However, the widespread application of anaerobic digestion has been hindered by poor system stability, low methanogenic activity and a high level of volatile fatty acids (VFAs) accumulation, increasing the operational costs of treatment. Conductive materials can be added to the digester to improve the performance of anaerobic digestion in landfill leachate treatment systems and studies reporting the use of conductive materials for this purpose are hereby thoroughly reviewed. The mechanism of microbial growth and enrichment by conductive materials is discussed, as well as the subsequent effect on waste metabolism, methane production, syntrophic relationships and interspecies electron transfer. The porous structure, specific surface area and conductivity of conductive materials play vital roles in the facilitation of syntrophic relationships between fermentative bacteria and methanogenic archaea. In addition, the mediation of direct interspecies electron transfer (DIET) by conductive materials increases the methane content of biogas from 16% to 60% as compared to indirect interspecies electron transfer (IIET) in conventional anaerobic digestion systems. This review identifies research gaps in the field of material-amended anaerobic systems, suggesting future research directions including investigations into combined chemical-biological treatments for landfill leachate, microbial management using conductive materials for efficient pollutant removal and the capacity for material reuse. Moreover, findings of this review provide a reference for the efficient and large-scale treatment of landfill leachate by anaerobic digestion with conductive materials.
Collapse
Affiliation(s)
- Mohammad Nabi
- School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China
| | - Hong Liang
- School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China
| | - Lang Cheng
- School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China
| | - Wenbo Yang
- School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China
| | - Dawen Gao
- School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing, 100044, China.
| |
Collapse
|
3
|
Chen L, Meng X, Zhou G, Zhou Z, Zheng T, Bai Y, Yuan H, Huhe T. Effects of organic loading rates on the anaerobic co-digestion of fresh vinegar residue and pig manure: Focus on the performance and microbial communities. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108441] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
4
|
Puig-Castellví F, Midoux C, Guenne A, Conteau D, Franchi O, Bureau C, Madigou C, Jouan-Rimbaud Bouveresse D, Kroff P, Mazéas L, Rutledge DN, Gaval G, Chapleur O. Metataxonomics, metagenomics and metabolomics analysis of the influence of temperature modification in full-scale anaerobic digesters. BIORESOURCE TECHNOLOGY 2022; 346:126612. [PMID: 34954354 DOI: 10.1016/j.biortech.2021.126612] [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: 10/18/2021] [Revised: 12/17/2021] [Accepted: 12/18/2021] [Indexed: 06/14/2023]
Abstract
Full-scale anaerobic digesters' performance is regulated by modifying their operational conditions, but little is known about how these modifications affect their microbiome. In this work, we monitored two originally mesophilic (35 °C) full-scale anaerobic digesters during 476 days. One digester was submitted to sub-mesophilic (25 °C) conditions between days 123 and 373. We characterized the effect of temperature modification using a multi-omics (metataxonomics, metagenomics, and metabolomics) approach. The metataxonomics and metagenomics results revealed that the lower temperature allowed a substantial increase of the sub-dominant bacterial population, destabilizing the microbial community equilibrium and reducing the biogas production. After restoring the initial mesophilic temperature, the bacterial community manifested resilience in terms of microbial structure and functional activity. The metabolomic signature of the sub-mesophilic acclimation was characterized by a rise of amino acids and short peptides, suggesting a protein degradation activity not directed towards biogas production.
Collapse
Affiliation(s)
- Francesc Puig-Castellví
- Université Paris-Saclay, INRAE, AgroParisTech, UMR SayFood, 75005 Paris, France; Université Paris-Saclay, INRAE, PRocédés biOtechnologiques au Service de l'Environnement, 92160 Antony, France
| | - Cédric Midoux
- Université Paris-Saclay, INRAE, PRocédés biOtechnologiques au Service de l'Environnement, 92160 Antony, France; Université Paris-Saclay, INRAE, MaIAGE, 78350, Jouy-en-Josas, France; Université Paris-Saclay, INRAE, BioinfOmics, MIGALE bioinformatics facility, 78350, Jouy-en-Josas, France
| | - Angéline Guenne
- Université Paris-Saclay, INRAE, PRocédés biOtechnologiques au Service de l'Environnement, 92160 Antony, France
| | | | - Oscar Franchi
- Université Paris-Saclay, INRAE, PRocédés biOtechnologiques au Service de l'Environnement, 92160 Antony, France; Universidad Adolfo Ibanez, Facultad de ingeniería y ciencias, 2520000 Viña del mar, Chile
| | - Chrystelle Bureau
- Université Paris-Saclay, INRAE, PRocédés biOtechnologiques au Service de l'Environnement, 92160 Antony, France
| | - Céline Madigou
- Université Paris-Saclay, INRAE, PRocédés biOtechnologiques au Service de l'Environnement, 92160 Antony, France
| | | | | | - Laurent Mazéas
- Université Paris-Saclay, INRAE, PRocédés biOtechnologiques au Service de l'Environnement, 92160 Antony, France
| | - Douglas N Rutledge
- Université Paris-Saclay, INRAE, AgroParisTech, UMR SayFood, 75005 Paris, France; National Wine and Grape Industry Centre, Charles Sturt University, 2650 Wagga Wagga, Australia
| | | | - Olivier Chapleur
- Université Paris-Saclay, INRAE, PRocédés biOtechnologiques au Service de l'Environnement, 92160 Antony, France.
| |
Collapse
|
5
|
Hassa J, Klang J, Benndorf D, Pohl M, Hülsemann B, Mächtig T, Effenberger M, Pühler A, Schlüter A, Theuerl S. Indicative Marker Microbiome Structures Deduced from the Taxonomic Inventory of 67 Full-Scale Anaerobic Digesters of 49 Agricultural Biogas Plants. Microorganisms 2021; 9:1457. [PMID: 34361893 PMCID: PMC8307424 DOI: 10.3390/microorganisms9071457] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 07/01/2021] [Accepted: 07/03/2021] [Indexed: 11/24/2022] Open
Abstract
There are almost 9500 biogas plants in Germany, which are predominantly operated with energy crops and residues from livestock husbandry over the last two decades. In the future, biogas plants must be enabled to use a much broader range of input materials in a flexible and demand-oriented manner. Hence, the microbial communities will be exposed to frequently varying process conditions, while an overall stable process must be ensured. To accompany this transition, there is the need to better understand how biogas microbiomes respond to management measures and how these responses affect the process efficiency. Therefore, 67 microbiomes originating from 49 agricultural, full-scale biogas plants were taxonomically investigated by 16S rRNA gene amplicon sequencing. These microbiomes were separated into three distinct clusters and one group of outliers, which are characterized by a specific distribution of 253 indicative taxa and their relative abundances. These indicative taxa seem to be adapted to specific process conditions which result from a different biogas plant operation. Based on these results, it seems to be possible to deduce/assess the general process condition of a biogas digester based solely on the microbiome structure, in particular on the distribution of specific indicative taxa, and without knowing the corresponding operational and chemical process parameters. Perspectively, this could allow the development of detection systems and advanced process models considering the microbial diversity.
Collapse
Affiliation(s)
- Julia Hassa
- Center for Biotechnology (CeBiTec), Bielefeld University, Universitätsstrasse 27, 33615 Bielefeld, Germany; (J.H.); (A.P.); (A.S.)
- Department Bioengineering, Leibniz Institute for Agricultural Engineering and Bioeconomy, Max-Eyth-Allee 100, 14469 Potsdam, Germany;
| | - Johanna Klang
- Department Bioengineering, Leibniz Institute for Agricultural Engineering and Bioeconomy, Max-Eyth-Allee 100, 14469 Potsdam, Germany;
| | - Dirk Benndorf
- Bioprocess Engineering, Otto von Guericke University, Universitätsplatz 2, 39106 Magdeburg, Germany;
- Bioprocess Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Sandtorstraße 1, 39106 Magdeburg, Germany
- Microbiology, Anhalt University of Applied Sciences, Bernburger Straße 55, 06366 Köthen, Germany
| | - Marcel Pohl
- Biochemical Conversion Department, DBFZ Deutsches Biomasseforschungszentrum Gemeinnützige GmbH, Torgauer Straße 116, 04347 Leipzig, Germany;
| | - Benedikt Hülsemann
- The State Institute of Agricultural Engineering and Bioenergy, University of Hohenheim, Garbenstraße 9, 70599 Stuttgart, Germany;
| | - Torsten Mächtig
- Institute of Agricultural Engineering, Kiel University, Max-Eyth-Str. 6, 24118 Kiel, Germany;
| | - Mathias Effenberger
- Institute for Agricultural Engineering and Animal Husbandry, Bavarian State Research Center for Agriculture, Vöttinger Str. 36, 85354 Freising, Germany;
| | - Alfred Pühler
- Center for Biotechnology (CeBiTec), Bielefeld University, Universitätsstrasse 27, 33615 Bielefeld, Germany; (J.H.); (A.P.); (A.S.)
| | - Andreas Schlüter
- Center for Biotechnology (CeBiTec), Bielefeld University, Universitätsstrasse 27, 33615 Bielefeld, Germany; (J.H.); (A.P.); (A.S.)
| | - Susanne Theuerl
- Department Bioengineering, Leibniz Institute for Agricultural Engineering and Bioeconomy, Max-Eyth-Allee 100, 14469 Potsdam, Germany;
| |
Collapse
|
6
|
Cai W, Long F, Wang Y, Liu H, Guo K. Enhancement of microbiome management by machine learning for biological wastewater treatment. Microb Biotechnol 2021; 14:59-62. [PMID: 33222377 PMCID: PMC7888473 DOI: 10.1111/1751-7915.13707] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 10/28/2020] [Indexed: 11/29/2022] Open
Abstract
Here, we propose to develop microbiome-based machine learning models to predict the response of biological wastewater treatment systems to environmental or operational disturbances or to design specific microbiomes to achieve a desired system function. These machine learning models can be used to enhance the stability of microbiome-based biological systems and warn against the failure of these systems.
Collapse
Affiliation(s)
- Wenfang Cai
- School of Chemical Engineering and TechnologyXi'an Jiaotong UniversityXi'an710049China
- Department of Environmental Science and EngineeringXi'an Jiaotong UniversityXi'an710049China
| | - Fei Long
- Department of Biological and Ecological EngineeringOregon State UniversityCorvallisOR97331USA
| | - Yunhai Wang
- Department of Environmental Science and EngineeringXi'an Jiaotong UniversityXi'an710049China
| | - Hong Liu
- Department of Biological and Ecological EngineeringOregon State UniversityCorvallisOR97331USA
| | - Kun Guo
- School of Chemical Engineering and TechnologyXi'an Jiaotong UniversityXi'an710049China
| |
Collapse
|
7
|
Cheaib B, Seghouani H, Ijaz UZ, Derome N. Community recovery dynamics in yellow perch microbiome after gradual and constant metallic perturbations. MICROBIOME 2020; 8:14. [PMID: 32041654 PMCID: PMC7011381 DOI: 10.1186/s40168-020-0789-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 01/19/2020] [Indexed: 05/11/2023]
Abstract
BACKGROUND The eco-evolutionary processes ruling post-disturbance microbial assembly remain poorly studied, particularly in host-microbiome systems. The community recovery depends not only on the type, duration, intensity, and gradient of disturbance, but also on the initial community structure, phylogenetic composition, legacy, and habitat (soil, water, host). In this study, yellow perch (Perca flavescens) juveniles were exposed over 90 days to constant and gradual sublethal doses of cadmium chloride. Afterward, the exposure of aquaria tank system to cadmium was ceased for 60 days. The skin, gut and water tank microbiomes in control and treatment groups, were characterized before, during and after the cadmium exposure using 16s rDNA libraries and high throughput sequencing technology (Illumina, Miseq). RESULTS Our data exhibited long-term bioaccumulation of cadmium salts in the liver even after two months since ceasing the exposure. The gradient of cadmium disturbance had differential effects on the perch microbiota recovery, including increases in evenness, taxonomic composition shifts, as well as functional and phylogenetic divergence. The perch microbiome reached an alternative stable state in the skin and nearly complete recovery trajectories in the gut communities. The recovery of skin communities showed a significant proliferation of opportunistic fish pathogens (i.e., Flavobacterium). Our findings provide evidence that neutral processes were a much more significant contributor to microbial community turnover in control treatments than in those treated with cadmium, suggesting the role of selective processes in driving community recovery. CONCLUSIONS The short-term metallic disturbance of fish development has important long-term implications for host health. The recovery of microbial communities after metallic exposure depends on the magnitude of exposure (constant, gradual), and the nature of the ecological niche (water, skin, and gut). The skin and gut microbiota of fish exposed to constant concentrations of cadmium (CC) were closer to the control negative than those exposed to the gradual concentrations (CV). Overall, our results show that the microbial assembly during the community recovery were both orchestrated by neutral and deterministic processes. Video Abtract.
Collapse
Affiliation(s)
- Bachar Cheaib
- Institut de Biologie Intégrative et des Systèmes (IBIS), Pavillon Charles-Eugène Marchand, Université Laval, 1030, avenue de la Médecine, Québec, QC G1V 0A6 Canada
- School of Engineering, University of Glasgow, Glasgow, G12 8QQ Scotland
| | - Hamza Seghouani
- Institut de Biologie Intégrative et des Systèmes (IBIS), Pavillon Charles-Eugène Marchand, Université Laval, 1030, avenue de la Médecine, Québec, QC G1V 0A6 Canada
| | - Umer Zeeshan Ijaz
- School of Engineering, University of Glasgow, Glasgow, G12 8QQ Scotland
| | - Nicolas Derome
- Institut de Biologie Intégrative et des Systèmes (IBIS), Pavillon Charles-Eugène Marchand, Université Laval, 1030, avenue de la Médecine, Québec, QC G1V 0A6 Canada
| |
Collapse
|
8
|
Yi Y, Wang H, Chen Y, Gou M, Xia Z, Hu B, Nie Y, Tang Y. Identification of Novel Butyrate- and Acetate-Oxidizing Bacteria in Butyrate-Fed Mesophilic Anaerobic Chemostats by DNA-Based Stable Isotope Probing. MICROBIAL ECOLOGY 2020; 79:285-298. [PMID: 31263981 DOI: 10.1007/s00248-019-01400-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 06/11/2019] [Indexed: 06/09/2023]
Abstract
Butyrate is one of the most important intermediates during anaerobic digestion of protein wastewater, and its oxidization is considered as a rate-limiting step during methane production. However, information on syntrophic butyrate-oxidizing bacteria (SBOB) is limited due to the difficulty in isolation of pure cultures. In this study, two anaerobic chemostats fed with butyrate as the sole carbon source were operated at different dilution rates (0.01/day and 0.05/day). Butyrate- and acetate-oxidizing bacteria in both chemostats were investigated, combining DNA-Stable Isotope Probing (DNA-SIP) and 16S rRNA gene high-throughput sequencing. The results showed that, in addition to known SBOB, Syntrophomonas, other species of unclassified Syntrophomonadaceae were putative butyrate-oxidizing bacteria. Species of Mesotoga, Aminivibrio, Acetivibrio, Desulfovibrio, Petrimonas, Sedimentibacter, unclassified Anaerolineae, unclassified Synergistaceae, unclassified Spirochaetaceae, and unclassified bacteria may contribute to acetate oxidation from butyrate metabolism. Among them, the ability of butyrate oxidation was unclear for species of Sedimentibacter, unclassified Synergistaceae, unclassified Spirochaetaceae, and unclassified bacteria. These results suggested that more unknown species participated in the degradation of butyrate. However, the corresponding function and pathway for butyrate or acetate oxidization of these labeled species need to be further investigated.
Collapse
Affiliation(s)
- Yue Yi
- College of Architecture and Environment, Sichuan University, No. 24, South Section 1, First Ring Road, Chengdu, 610065, Sichuan, China
| | - HuiZhong Wang
- College of Architecture and Environment, Sichuan University, No. 24, South Section 1, First Ring Road, Chengdu, 610065, Sichuan, China
| | - YaTing Chen
- Institute for Disaster Management and Reconstruction, Sichuan University-The Hong Kong Polytechnic University, No. 122 Huanghe Middle Road Section 1, Shuangliu District, Chengdu, 610027, Sichuan, China
| | - Min Gou
- College of Architecture and Environment, Sichuan University, No. 24, South Section 1, First Ring Road, Chengdu, 610065, Sichuan, China.
| | - ZiYuan Xia
- College of Architecture and Environment, Sichuan University, No. 24, South Section 1, First Ring Road, Chengdu, 610065, Sichuan, China
| | - Bin Hu
- College of Engineering, Peking University, No. 5 Yiheyuan Road, Haidian District, Beijing, 100871, China
| | - Yong Nie
- College of Engineering, Peking University, No. 5 Yiheyuan Road, Haidian District, Beijing, 100871, China
| | - YueQin Tang
- College of Architecture and Environment, Sichuan University, No. 24, South Section 1, First Ring Road, Chengdu, 610065, Sichuan, China
| |
Collapse
|
9
|
Progressive Microbial Community Networks with Incremental Organic Loading Rates Underlie Higher Anaerobic Digestion Performance. mSystems 2020; 5:5/1/e00357-19. [PMID: 31911462 PMCID: PMC6946792 DOI: 10.1128/msystems.00357-19] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Although biotic interactions among members of microbial communities have been conceived to be crucial for community assembly, it remains unclear how changes in environmental conditions affect microbial interaction and consequently system performance. Here, we adopted a random matrix theory-based network analysis to explore microbial interactions in triplicate anaerobic digestion (AD) systems, which is widely applied for organic pollutant treatments. The digesters were operated with incremental organic loading rates (OLRs) from 1.0 g volatile solids (VS)/liter/day to 1.3 g VS/liter/day and then to 1.5 g VS/liter/day, which increased VS removal and methane production proportionally. Higher resource availability led to networks with higher connectivity and shorter harmonic geodesic distance, suggestive of more intense microbial interactions and quicker responses to environmental changes. Strikingly, a number of topological properties of microbial network showed significant (P < 0.05) correlation with AD performance (i.e., methane production, biogas production, and VS removal). When controlling for environmental parameters (e.g., total ammonia, pH, and the VS load), node connectivity, especially that of the methanogenic archaeal network, still correlated with AD performance. Last, we identified the Methanothermus, Methanobacterium, Chlorobium, and Haloarcula taxa and an unclassified Thaumarchaeota taxon as keystone nodes of the network.IMPORTANCE AD is a biological process widely used for effective waste treatment throughout the world. Biotic interactions among microbes are critical to the assembly and functioning of the microbial community, but the response of microbial interactions to environmental changes and their influence on AD performance are still poorly understood. Using well-replicated time series data of 16S rRNA gene amplicons and functional gene arrays, we constructed random matrix theory-based association networks to characterize potential microbial interactions with incremental OLRs. We demonstrated striking linkage between network topological features of methanogenic archaea and AD functioning independent of environmental parameters. As the intricate balance of multiple microbial functional groups is responsible for methane production, our results suggest that microbial interaction may be an important, previously unrecognized mechanism in determining AD performance.
Collapse
|
10
|
Wang H, Zhu X, Yan Q, Zhang Y, Angelidaki I. Microbial community response to ammonia levels in hydrogen assisted biogas production and upgrading process. BIORESOURCE TECHNOLOGY 2020; 296:122276. [PMID: 31677406 DOI: 10.1016/j.biortech.2019.122276] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 10/07/2019] [Accepted: 10/15/2019] [Indexed: 06/10/2023]
Abstract
Biological conversion of carbon dioxide into methane using hydrogen derived from surplus renewable energy (wind power) as reducing power is a novel technology for biogas upgrading. High ammonia concentrations are toxic to the biogas upgrading process, however the mechanisms behind the inhibition as well as the microbial stress response in such unique upgrading system have never been reported. Thus, the effect of high ammonia concentrations on microbial community during hydrogen induced biogas upgrading process was evaluated here. The results showed that a change from aceticlastic pathway to hydrogenotrophic pathway occurred when ammonia level increased (1-7 g NH4+-N L-1). In addition, the bacteria, potentially syntrophic associated with hydrogenotrophic methanogens, were enriched at high ammonia concentrations. Moreover, growth of some bacteria (e.g., Halanaerobiaceaeen and Leucobacter) which were vulnerable to ammonia toxicity was restored upon hydrogen injection. Furthermore, hydrogen injection under high ammonia concentration could promote growth of some hydrolytic and fermentative bacteria.
Collapse
Affiliation(s)
- Han Wang
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China; Department of Environmental Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Xinyu Zhu
- Department of Environmental Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Qun Yan
- School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Yifeng Zhang
- Department of Environmental Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
| | - Irini Angelidaki
- Department of Environmental Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| |
Collapse
|
11
|
Fernandez‐Gonzalez N, Pedizzi C, Lema JM, Carballa M. Air-side ammonia stripping coupled to anaerobic digestion indirectly impacts anaerobic microbiome. Microb Biotechnol 2019; 12:1403-1416. [PMID: 31532080 PMCID: PMC6801131 DOI: 10.1111/1751-7915.13482] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 06/26/2019] [Accepted: 08/13/2019] [Indexed: 11/29/2022] Open
Abstract
Air-side stripping without a prior solid-liquid phase separation step is a feasible and promising process to control ammonia concentration in thermophilic digesters. During the process, part of the anaerobic biomass is exposed to high temperature, high pH and aerobic conditions. However, there are no studies assessing the effects of those harsh conditions on the microbial communities of thermophilic digesters. To fill this knowledge gap, the microbiomes of two thermophilic digesters (55°C), fed with a mixture of pig manure and nitrogen-rich co-substrates, were investigated under different organic loading rates (OLR: 1.1-5.2 g COD l-1 day-1 ), ammonia concentrations (0.2-1.5 g free ammonia nitrogen l-1 ) and stripping frequencies (3-5 times per week). The bacterial communities were dominated by Firmicutes and Bacteroidetes phyla, while the predominant methanogens were Methanosarcina sp archaea. Increasing co-substrate fraction, OLR and free ammonia nitrogen (FAN) favoured the presence of genera Ruminiclostridium, Clostridium and Tepidimicrobium and of hydrogenotrophic methanogens, mainly Methanoculleus archaea. The data indicated that the use of air-side stripping did not adversely affect thermophilic microbial communities, but indirectly modulated them by controlling FAN concentrations in the digester. These results demonstrate the viability at microbial community level of air side-stream stripping process as an adequate technology for the ammonia control during anaerobic co-digestion of nitrogen-rich substrates.
Collapse
Affiliation(s)
- Nuria Fernandez‐Gonzalez
- Department of Chemical EngineeringUniversidade de Santiago de CompostelaRúa Lope Gómez de Marzoa, s/n.15782Santiago de CompostelaSpain
- Present address:
Present address:Department of Chemical Engineering and Environmental TechnologyValladolid UniversityDr. Mergelina, s/n47011ValladolidSpain
| | - Chiara Pedizzi
- Department of Chemical EngineeringUniversidade de Santiago de CompostelaRúa Lope Gómez de Marzoa, s/n.15782Santiago de CompostelaSpain
| | - Juan M. Lema
- Department of Chemical EngineeringUniversidade de Santiago de CompostelaRúa Lope Gómez de Marzoa, s/n.15782Santiago de CompostelaSpain
| | - Marta Carballa
- Department of Chemical EngineeringUniversidade de Santiago de CompostelaRúa Lope Gómez de Marzoa, s/n.15782Santiago de CompostelaSpain
| |
Collapse
|
12
|
Strübing D, Moeller AB, Mößnang B, Lebuhn M, Drewes JE, Koch K. Load change capability of an anaerobic thermophilic trickle bed reactor for dynamic H 2/CO 2 biomethanation. BIORESOURCE TECHNOLOGY 2019; 289:121735. [PMID: 31300304 DOI: 10.1016/j.biortech.2019.121735] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 06/26/2019] [Accepted: 06/30/2019] [Indexed: 06/10/2023]
Abstract
Increasing shares of energy production originating from fluctuating renewable sources require measures that are able to balance power production for a stable electricity grid. H2/CO2 biomethanation is a suitable approach to convert fluctuating excess renewable energy into the storable substitute natural gas. This study investigated the rapid load change capability of an anaerobic thermophilic trickle bed reactor while maintaining a high methane content. The return to full load (62.1 m3H2/m3trickle bed/d) after a 30-min operational off-cycle was possible almost immediately, while 24-h interruptions required a 60-min stepwise load increase. To accelerate this delayed microbial conversion activity, non-steady state substrate gas conversion can be controlled via substrate and product gas flow rates, allowing to reactivate the entire microbial community and produce high quality product gas. Reactor design might be further improved to avoid short-circuiting and use the entire trickle bed gas phase as high quality gas buffer during initial load increases.
Collapse
Affiliation(s)
- Dietmar Strübing
- Technical University of Munich, Chair of Urban Water Systems Engineering, Am Coulombwall 3, 85748 Garching, Germany
| | - Andreas B Moeller
- Technical University of Munich, Chair of Urban Water Systems Engineering, Am Coulombwall 3, 85748 Garching, Germany
| | - Bettina Mößnang
- Bavarian State Research Center for Agriculture, Central Department for Quality Assurance and Analytics, Lange Point 6, 85354 Freising, Germany
| | - Michael Lebuhn
- Bavarian State Research Center for Agriculture, Central Department for Quality Assurance and Analytics, Lange Point 6, 85354 Freising, Germany
| | - Jörg E Drewes
- Technical University of Munich, Chair of Urban Water Systems Engineering, Am Coulombwall 3, 85748 Garching, Germany
| | - Konrad Koch
- Technical University of Munich, Chair of Urban Water Systems Engineering, Am Coulombwall 3, 85748 Garching, Germany.
| |
Collapse
|
13
|
Spatial Variations of Bacterial Communities of an Anaerobic Lagoon-Type Biodigester Fed with Dairy Manure. Processes (Basel) 2019. [DOI: 10.3390/pr7070408] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Anaerobic digestion technology is being widely employed for sustainable management of organic wastes generated in animal farms, industries, etc. Nevertheless, biodigester microbiome is still considered a “black box” because it is regulated by different physico-chemical and operational factors. In this study, the bacterial diversity and composition in different sites of a full-scale lagoon type biodigester (23,000 m3) fed with dairy manure, viz., the influent, beginning, middle, final and effluent were analyzed. The biodigester registered a total of 1445 OTUs, which demonstrated the complex microbial ecosystem in it. Of them, only six OTUs were shared among all the different sampling points. The most abundant phyla belonged to Firmicutes, Proteobacteria, Latescibacteria and Thermotogae. The Simpson and Shannon index showed that the highest microbial diversity was observed in the beginning point of the biodigester, meanwhile, the lowest diversity was recorded in the middle. Based on the UniFrac distances, microbial communities with high similarity were recorded in the middle and final of the biodigester. It can be clearly observed that bacterial communities varied at the different points of the biodigester. However, based on metagenome predictions using PICRUSt, it was found that independent of the differences in taxonomy and location, bacterial communities maintained similar metabolic functions.
Collapse
|
14
|
Acetotrophic Activity Facilitates Methanogenesis from LCFA at Low Temperatures: Screening from Mesophilic Inocula. ARCHAEA-AN INTERNATIONAL MICROBIOLOGICAL JOURNAL 2019; 2019:1751783. [PMID: 31191117 PMCID: PMC6525847 DOI: 10.1155/2019/1751783] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 02/14/2019] [Accepted: 04/03/2019] [Indexed: 12/04/2022]
Abstract
The inoculum source plays a crucial role in the anaerobic treatment of wastewaters. Lipids are present in various wastewaters and have a high methanogenic potential, but their hydrolysis results in the production of long chain fatty acids (LCFAs) that are inhibitory to anaerobic microorganisms. Screening of inoculum for the anaerobic treatment of LCFA-containing wastewaters has been performed at mesophilic and thermophilic conditions. However, an evaluation of inocula for producing methane from LCFA-containing wastewater has not yet been conducted at low temperatures and needs to be undertaken. In this study, three inocula (one granular sludge and two municipal digester sludges) were assessed for methane production from LCFA-containing synthetic dairy wastewater (SDW) at low temperatures (10 and 20°C). A methane yield (based on mL-CH4/g-CODadded) of 86-65% with acetate and 45-20% with SDW was achieved within 10 days using unacclimated granular sludge, whereas the municipal digester sludges produced methane only at 20°C but not at 10°C even after 200 days of incubation. The acetotrophic activity in the inoculum was found to be crucial for methane production from LCFA at low temperatures, highlighting the role of Methanosaeta (acetoclastic archaea) at low temperatures. The presence of bacterial taxa from the family Syntrophaceae (Syntrophus and uncultured taxa) in the inoculum was found to be important for methane production from SDW at 10°C. This study suggests the evaluation of acetotrophic activity and the initial microbial community characteristics by high-throughput amplicon sequencing for selecting the inoculum for producing methane at low temperatures (up to 10°C) from lipid-containing wastewaters.
Collapse
|
15
|
Process Disturbances in Agricultural Biogas Production—Causes, Mechanisms and Effects on the Biogas Microbiome: A Review. ENERGIES 2019. [DOI: 10.3390/en12030365] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Disturbances of the anaerobic digestion process reduce the economic and environmental performance of biogas systems. A better understanding of the highly complex process is of crucial importance in order to avoid disturbances. This review defines process disturbances as significant changes in the functionality within the microbial community leading to unacceptable and severe decreases in biogas production and requiring an active counteraction to be overcome. The main types of process disturbances in agricultural biogas production are classified as unfavorable process temperatures, fluctuations in the availability of macro- and micronutrients (feedstock variability), overload of the microbial degradation potential, process-related accumulation of inhibiting metabolites such as hydrogen (H2), ammonium/ammonia (NH4+/NH3) or hydrogen sulphide (H2S) and inhibition by other organic and inorganic toxicants. Causes, mechanisms and effects on the biogas microbiome are discussed. The need for a knowledge-based microbiome management to ensure a stable and efficient production of biogas with low susceptibility to disturbances is derived and an outlook on potential future process monitoring and control by means of microbial indicators is provided.
Collapse
|
16
|
Grohmann A, Vainshtein Y, Euchner E, Grumaz C, Bryniok D, Rabus R, Sohn K. Genetic repertoires of anaerobic microbiomes driving generation of biogas. BIOTECHNOLOGY FOR BIOFUELS 2018; 11:255. [PMID: 30250507 PMCID: PMC6146632 DOI: 10.1186/s13068-018-1258-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 09/11/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Biogas production is an attractive technology for a sustainable generation of renewable energy. Although the microbial community is fundamental for such production, the process control is still limited to technological and chemical parameters. Currently, most of the efforts on microbial management system (MiMaS) are focused on process-specific marker species and community dynamics, but a practical implementation is in its infancy. The high number of unknown and uncharacterized microorganisms in general is one of the reasons hindering further advancements. RESULTS A Biogas Metagenomics Hybrid Assembly (BioMETHA) database, derived from microbiomes of biogas plants, was generated using a dedicated assembly strategy for different metagenomic datasets. Long reads from nanopore sequencing (MinION) were combined with short, more accurate second-generation sequencing reads (Illumina). The hybrid assembly resulted in 231 genomic bins each representing a taxonomic unit with an average completeness of 47%. Functional annotation identified 13,190 non-redundant genes covering roughly 207 k coding sequences. Mapping rates of metagenomics DNA derived from diverse biogas plants and laboratory reactors increased up to 73%. In addition, an EC (enzyme commission) reference sequence collection (ERSC) was generated whose genes are crucial for biogas-related processes, consisting of 235 unique EC numbers organized in 52 metabolic modules. Mapping rates of metatranscriptomic data to this ERSC revealed coverages of up to 93%. Process parameters and imbalances of laboratory reactors could be reconstructed by evaluating abundance of biogas-specific metabolic modules using metatranscriptomic data derived from various fermenter systems. CONCLUSION This newly established metagenomic hybrid assembly in combination with an EC reference sequence collection might help to shed light on the microbial dark matter of biogas plants by contributing to the development of a reference for biogas plant microbiome-specific gene sequences. Considering a biogas microbiome as a complex meta-organism expressing a meta-transcriptome, the approach established here could lay the foundation for a function-based microbial management system.
Collapse
Affiliation(s)
- Anja Grohmann
- University of Stuttgart IGVP, Pfaffenwaldring 31, 70569 Stuttgart, Germany
| | | | - Ellen Euchner
- University of Applied Science Hamm-Lippstadt, Marker Allee 76–78, 59063 Hamm, Germany
| | | | - Dieter Bryniok
- University of Applied Science Hamm-Lippstadt, Marker Allee 76–78, 59063 Hamm, Germany
| | - Ralf Rabus
- Institute for Chemistry and Biology of the Marine Environment (ICBM), University of Oldenburg, Carl-von-Ossietzky-Strasse 9-11, 26111 Oldenburg, Germany
| | - Kai Sohn
- Fraunhofer IGB, Nobelstrasse 12, 70569 Stuttgart, Germany
| |
Collapse
|
17
|
Poirier S, Déjean S, Chapleur O. Support media can steer methanogenesis in the presence of phenol through biotic and abiotic effects. WATER RESEARCH 2018; 140:24-33. [PMID: 29684699 DOI: 10.1016/j.watres.2018.04.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 04/11/2018] [Accepted: 04/13/2018] [Indexed: 06/08/2023]
Abstract
A wide variety of inhibitors can induce anaerobic digester disruption. To avoid performance losses, support media can be used to mitigate inhibitions. However, distinguishing the physico-chemical from the biological mechanisms of such strategies remains delicate. In this framework, the impact of 10 g/L of different types of zeolites and activated carbons (AC) on microbial community dynamics during anaerobic digestion of biowaste in the presence of 1.3 g/L of phenol was evaluated with 16 S rRNA gene sequencing. In the presence of AC, methanogenesis inhibition was rapidly removed due to a decrease of phenol concentration. This abiotic effect related to the physico-chemical properties of AC led to increased final CH4 and CO2 productions by 29-31% compared to digesters incubated without support. Interestingly, although zeolite did not adsorb phenol, final CH4 and CO2 production reached comparable levels as with AC. Nevertheless, compared to digesters incubated without support, methanogenesis lag phase duration was less reduced in the presence of zeolites (5 ± 1 days) than in the presence of activated carbons (12 ± 2 days). Both types of support induced biotic effects. AC and zeolite both allowed the preservation of the major representative archaeal genus of the non-inhibited ecosystem, Methanosarcina. By contrast, they distinctly shaped bacterial populations. OTUs belonging to class W5 became dominant at the expense of OTUs assigned to orders Clostridiales, Bacteroidales and Anaerolinales in the presence of AC. Zeolite enhanced the implantation of OTUs assigned to bacterial phylum Cloacimonetes. This study highlighted that supports can induce biotic and abiotic effects within digesters inhibited with phenol, showing potentialities to enhance anaerobic digestion stability under disrupting conditions.
Collapse
Affiliation(s)
- Simon Poirier
- Hydrosystems and Bioprocesses Research Unit, Irstea, France.
| | - Sébastien Déjean
- Toulouse Mathematics Institute, UMR 5219 CNRS, Toulouse University, Toulouse, France.
| | | |
Collapse
|
18
|
Martin Vincent N, Wei Y, Zhang J, Yu D, Tong J. Characterization and Dynamic Shift of Microbial Communities during Start-Up, Overloading and Steady-State in an Anaerobic Membrane Bioreactor. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:ijerph15071399. [PMID: 29970829 PMCID: PMC6068774 DOI: 10.3390/ijerph15071399] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 06/19/2018] [Accepted: 06/26/2018] [Indexed: 01/10/2023]
Abstract
A lab-scale anaerobic membrane bioreactor (AnMBR) with a side stream tubular membrane was developed to treat synthetic domestic sewage to evaluate its performance and the dynamic shift of bacterial and archaeal communities during the start-up, steady-state, overloading and recovery periods of operation at mesophilic temperatures. During the start-up period, the bacterial and archaeal communities changed drastically, and Proteobacteria and Bacteroidetes predominated. During the steady-state period, the AnMBR exhibited excellent COD removal above 91%, and COD of the effluent was below 50 mg/L. High-throughput sequencing analysis results revealed that bacterial and archaeal communities shifted significantly from the start-up to the steady-state period, and that the Proteobacteria phylum predominated on days 140, 162 and 190, and the archaea community hydrogenotrophic methanogen genus Methanolinea (1.5–6.64%) predominated over the aceticlastic methanogen genus Methanothrix (1.35–3.07%). During the overloading period, significant changes occurred in microbial community on day 210, e.g., the phyla Bacteroidetes (30%), Proteobacteria (23%) and Firmicutes (18%) predominated and the archaeal community was completely suppressed, and Methanobrevibacter (0.7%) was the only methanogen genus that emerged in the overloading period. After a shock loading period, the microbial communities exhibited significant changes within the ranks of methanogens and shifted to dominance of the aceticlastic methanogen pathway. In addition, the TVFAs to alkalinity ratio in this study was suitable as an indicator of monitoring performance in the AnMBR operation.
Collapse
Affiliation(s)
- Nsanzumukiza Martin Vincent
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Yuansong Wei
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
- Institute of Energy, Jiangxi Academy of Sciences, Nanchang 330096, China.
| | - Junya Zhang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Dawei Yu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Juan Tong
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
- University of Chinese Academy of Sciences, Beijing 100049, China.
| |
Collapse
|
19
|
Bacterial population dynamics in recycled mushroom compost leachate. Appl Microbiol Biotechnol 2018; 102:5335-5342. [DOI: 10.1007/s00253-018-9007-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 03/30/2018] [Accepted: 04/06/2018] [Indexed: 10/17/2022]
|
20
|
Val Del Rio A, Pichel A, Fernandez-Gonzalez N, Pedrouso A, Fra-Vázquez A, Morales N, Mendez R, Campos JL, Mosquera-Corral A. Performance and microbial features of the partial nitritation-anammox process treating fish canning wastewater with variable salt concentrations. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 208:112-121. [PMID: 29253740 DOI: 10.1016/j.jenvman.2017.12.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2017] [Revised: 10/31/2017] [Accepted: 12/04/2017] [Indexed: 06/07/2023]
Abstract
The partial nitritation-anammox (PN-AMX) process applied to wastewaters with high NaCl concentration was studied until now using simulated media, without considering the effect of organic matter concentration and the shift in microbial populations. This research work presents results on the application of this process to the treatment of saline industrial wastewater. Obtained results indicated that the PN-AMX process has the capability to recover its initial activity after a sudden/acute salt inhibition event (up to 16 g NaCl/L). With a progressive salt concentration increase for 150 days, the PN-AMX process was able to remove the 80% of the nitrogen at 7-9 g NaCl/L. The microbiological data indicated that NaCl and ammonia concentrations and temperature are important factors shaping PN-AMX communities. Thus, the NOB abundance (Nitrospira) decreases with the increase of the salt concentration, while heterotrophic denitrifiers are able to outcompete anammox after a peak of organic matter in the feeding.
Collapse
Affiliation(s)
- Angeles Val Del Rio
- Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E- 15705 Santiago de Compostela, Spain.
| | - Andres Pichel
- Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E- 15705 Santiago de Compostela, Spain.
| | - Nuria Fernandez-Gonzalez
- Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E- 15705 Santiago de Compostela, Spain.
| | - Alba Pedrouso
- Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E- 15705 Santiago de Compostela, Spain.
| | - Andrea Fra-Vázquez
- Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E- 15705 Santiago de Compostela, Spain.
| | - Nicolas Morales
- Aqualia, Guillarei WWTP, Camino de la Veiga s/n, E-36720 Tui, Spain.
| | - Ramon Mendez
- Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E- 15705 Santiago de Compostela, Spain.
| | - Jose Luis Campos
- Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez, Avda Padre Hurtado 750, Viña del Mar, E- 2503500, Chile.
| | - Anuska Mosquera-Corral
- Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, E- 15705 Santiago de Compostela, Spain.
| |
Collapse
|
21
|
Grohmann A, Fehrmann S, Vainshtein Y, Haag NL, Wiese F, Stevens P, Naegele HJ, Oechsner H, Hartsch T, Sohn K, Grumaz C. Microbiome dynamics and adaptation of expression signatures during methane production failure and process recovery. BIORESOURCE TECHNOLOGY 2018; 247:347-356. [PMID: 28954247 DOI: 10.1016/j.biortech.2017.08.214] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 08/30/2017] [Accepted: 08/31/2017] [Indexed: 06/07/2023]
Abstract
This study aimed to uncover microbial dynamics and transcriptional adaptations during mesophilic AD of maize silage and slurry. While one digester performed under optimal conditions, the investigations also evaluated the microbiome during a temperature drop mediated process failure accompanied by acidification and how it contributed to a process recovery. Composition and pathway activities were analyzed by whole genome shotgun (WGS) and metatranscriptome sequencing, respectively. A biodiversity of 112 species was observed with noticeable shifts over process time. Although four distinct groups of microbes could be identified with a correlating versatility according to substrate and to process disturbance, also tremendous effects on gene expression were monitored especially of the archaeal methane metabolism. Particularly, the expression of acetogenotrophic methanogenesis related genes was identified to be relevant for process regeneration.
Collapse
Affiliation(s)
- Anja Grohmann
- University of Stuttgart IGVP, Pfaffenwaldring 31, 70569 Stuttgart, Germany
| | | | | | - Nicola L Haag
- University of Hohenheim, State Institute of Agricultural Engineering and Bioenergy, Garbenstrasse 9, 70599 Stuttgart, Germany
| | | | - Philip Stevens
- Fraunhofer IGB, Nobelstrasse 12, 70569 Stuttgart, Germany
| | - Hans-Joachim Naegele
- University of Hohenheim, State Institute of Agricultural Engineering and Bioenergy, Garbenstrasse 9, 70599 Stuttgart, Germany
| | - Hans Oechsner
- University of Hohenheim, State Institute of Agricultural Engineering and Bioenergy, Garbenstrasse 9, 70599 Stuttgart, Germany
| | - Thomas Hartsch
- Genedata GmbH, Fürstenrieder Strasse 281, 81377 Munich, Germany
| | - Kai Sohn
- Fraunhofer IGB, Nobelstrasse 12, 70569 Stuttgart, Germany
| | | |
Collapse
|
22
|
Ramos-Suárez JL, Gómez D, Regueiro L, Baeza A, Hansen F. Alkaline and oxidative pretreatments for the anaerobic digestion of cow manure and maize straw: Factors influencing the process and preliminary economic viability of an industrial application. BIORESOURCE TECHNOLOGY 2017; 241:10-20. [PMID: 28549252 DOI: 10.1016/j.biortech.2017.05.054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 05/09/2017] [Accepted: 05/10/2017] [Indexed: 06/07/2023]
Abstract
This paper studies the application of calcium oxide (CaO), peracetic acid (PAA) and a combination of both in order to reduce lignin content and increase biogas potential of cow manure and maize straw. Changes in organic matter were mainly affected by the type of reagent use and the dosage, with minimum influence of exposure time and dilution. Changes in pH may limit the application of chemicals. Increase in biogas production with a combination of CaO and PAA, and separate application of PAA and CaO was 156.5%, 39.1% and 26.1% for cow manure and 125%, 137.5% and 37.5% for maize straw, respectively, compared to unpretreated samples. Pretreating cow manure with the aforementioned reagents does not increase the profitability of a biogas plant due mainly to the increase in operational costs from the intensive use of chemicals.
Collapse
Affiliation(s)
| | - Daniel Gómez
- ProCycla SL, Pau Casals 18, 4-4, 08240 Manresa, Spain.
| | - Leticia Regueiro
- Ainia Centro Tecnológico, Benjamin Franklin 5-11, E46980 Paterna, Spain
| | - Andrea Baeza
- ProCycla SPA, Gral Eugenio Garzón 6561, Vitacura 7640274, Región Metropolitana, Chile
| | - Felipe Hansen
- ProCycla SPA, Gral Eugenio Garzón 6561, Vitacura 7640274, Región Metropolitana, Chile
| |
Collapse
|
23
|
Poszytek K, Pyzik A, Sobczak A, Lipinski L, Sklodowska A, Drewniak L. The effect of the source of microorganisms on adaptation of hydrolytic consortia dedicated to anaerobic digestion of maize silage. Anaerobe 2017; 46:46-55. [DOI: 10.1016/j.anaerobe.2017.02.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 01/28/2017] [Accepted: 02/14/2017] [Indexed: 12/26/2022]
|
24
|
Effect of Seasonal Temperature on the Performance and on the Microbial Community of a Novel AWFR for Decentralized Domestic Wastewater Pretreatment. APPLIED SCIENCES-BASEL 2017. [DOI: 10.3390/app7060605] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Due to environmental burden and human health risks in developing countries, the treatment of decentralized domestic wastewater has been a matter of great concern in recent years. A novel pilot-scale three-stage anaerobic wool-felt filter reactor (AWFR) was designed to treat real decentralized domestic wastewater at seasonal temperature variations of 8 to 35 °C for 364 days. The results showed that the average chemical oxygen demand (COD) removal efficiencies of AWFR in summer and winter were 76 ± 7.2% and 52 ± 5.9% at one day and three days Hydraulic Retention Time (HRT), respectively. COD mass balance analysis demonstrated that even though COD removal was lower in winter, approximately 43.5% of influent COD was still converted to methane. High-throughput MiSeq sequencing analyses indicated that Methanosaeta, Methanobacterium, and Methanolinea were the predominant methanogens, whereas the genus Bacillus probably played important roles in fermentation processes throughout the whole operation period. The performance and microbial community composition study suggested the application potential of the AWFR system for the pretreatment of decentralized domestic wastewater.
Collapse
|
25
|
Wang W, Wu B, Pan S, Yang K, Hu Z, Yuan S. Performance robustness of the UASB reactors treating saline phenolic wastewater and analysis of microbial community structure. JOURNAL OF HAZARDOUS MATERIALS 2017; 331:21-27. [PMID: 28242525 DOI: 10.1016/j.jhazmat.2017.02.025] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 02/06/2017] [Accepted: 02/14/2017] [Indexed: 06/06/2023]
Abstract
Anaerobic digestion was an important way to remove phenols from saline wastewater; however the anaerobic microorganisms were adversely affected by high concentration of salts. In order to clarify the performance robustness and microbial community structure for anaerobic digestion of saline phenolic wastewater, the UASB reactors were compared to treat phenolic wastewater under saline and non-saline conditions. The saline reactors were operated stably with phenols concentration increasing from 100 to 500mgL-1 at 10g Na+ L-1. The robustness of the saline reactors was weakened at 1000mg phenols L-1 and 10g Na+ L-1. However, the substrate utilization rates (SURs) for phenol, catechol, resorcinol, hydroquinone, and the specific methanogenic activity (SMA) of sludge were decreased by 95%, 85%, 97%, 78%, and 68%, respectively with phenols concentration enhancing from 1000 to 2000mgL-1. Moreover, the SURs for phenol, catechol, resorcinol, hydroquinone, and the SMA of sludge were reduced by 32%, 65%, 74%, 45%, and 59%, respectively with Na+ concentration increasing from 10 to 20gL-1, in comparison with the values obtained at 10g Na+ L-1 and 1000mg phenols L-1. Finally, the analysis of microbial community structure demonstrated that phenols degraders were less tolerant to high concentrations of Na+ and phenols than methanogens.
Collapse
Affiliation(s)
- Wei Wang
- Department of Municipal Engineering, School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China.
| | - Benteng Wu
- Department of Municipal Engineering, School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China
| | - Shanglei Pan
- Department of Municipal Engineering, School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China
| | - Kai Yang
- Department of Municipal Engineering, School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China
| | - Zhenhu Hu
- Department of Municipal Engineering, School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China.
| | - Shoujun Yuan
- Department of Municipal Engineering, School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China
| |
Collapse
|
26
|
De Vrieze J, Christiaens MER, Walraedt D, Devooght A, Ijaz UZ, Boon N. Microbial community redundancy in anaerobic digestion drives process recovery after salinity exposure. WATER RESEARCH 2017; 111:109-117. [PMID: 28063283 DOI: 10.1016/j.watres.2016.12.042] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 12/23/2016] [Accepted: 12/24/2016] [Indexed: 05/08/2023]
Abstract
Anaerobic digestion of high-salinity wastewaters often results in process inhibition due to the susceptibility of the methanogenic archaea. The ability of the microbial community to deal with increased salinity levels is of high importance to ensure process perseverance or recovery after failure. The exact strategy of the microbial community to ensure process endurance is, however, often unknown. In this study, we investigated how the microbial community is able to recover process performance following a disturbance through the application of high-salinity molasses wastewater. After a stable start-up, methane production quickly decreased from 625 ± 17 to 232 ± 35 mL CH4 L-1 d-1 with a simultaneous accumulation in volatile fatty acids up to 20.5 ± 1.4 g COD L-1, indicating severe process disturbance. A shift in feedstock from molasses wastewater to waste activated sludge resulted in complete process recovery. However, the bacterial and archaeal communities did not return to their original composition as before the disturbance, despite similar process conditions. Microbial community diversity was recovered to similar levels as before disturbance, which indicates that the metabolic potential of the community was maintained. A mild increase in ammonia concentration after process recovery did not influence methane production, indicating a well-balanced microbial community. Hence, given the change in community composition following recovery after salinity disturbance, it can be assumed that microbial community redundancy was the major strategy to ensure the continuation of methane production, without loss of functionality or metabolic flexibility.
Collapse
Affiliation(s)
- Jo De Vrieze
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, B-9000, Gent, Belgium
| | - Marlies E R Christiaens
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, B-9000, Gent, Belgium
| | - Diego Walraedt
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, B-9000, Gent, Belgium
| | - Arno Devooght
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, B-9000, Gent, Belgium
| | - Umer Zeeshan Ijaz
- Infrastructure and Environment Research Division, School of Engineering, University of Glasgow, UK
| | - Nico Boon
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, B-9000, Gent, Belgium.
| |
Collapse
|
27
|
Morales N, Val del Río Á, Vázquez-Padín JR, Méndez R, Campos JL, Mosquera-Corral A. The granular biomass properties and the acclimation period affect the partial nitritation/anammox process stability at a low temperature and ammonium concentration. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.08.029] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
28
|
Vilajeliu-Pons A, Bañeras L, Puig S, Molognoni D, Vilà-Rovira A, Hernández-del Amo E, Balaguer MD, Colprim J. External Resistances Applied to MFC Affect Core Microbiome and Swine Manure Treatment Efficiencies. PLoS One 2016; 11:e0164044. [PMID: 27701451 PMCID: PMC5049776 DOI: 10.1371/journal.pone.0164044] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 09/19/2016] [Indexed: 11/19/2022] Open
Abstract
Microbial fuel cells (MFCs) can be designed to combine water treatment with concomitant electricity production. Animal manure treatment has been poorly explored using MFCs, and its implementation at full-scale primarily relies on the bacterial distribution and activity within the treatment cell. This study reports the bacterial community changes at four positions within the anode of two almost identically operated MFCs fed swine manure. Changes in the microbiome structure are described according to the MFC fluid dynamics and the application of a maximum power point tracking system (MPPT) compared to a fixed resistance system (Ref-MFC). Both external resistance and cell hydrodynamics are thought to heavily influence MFC performance. The microbiome was characterised both quantitatively (qPCR) and qualitatively (454-pyrosequencing) by targeting bacterial 16S rRNA genes. The diversity of the microbial community in the MFC biofilm was reduced and differed from the influent swine manure. The adopted electric condition (MPPT vs fixed resistance) was more relevant than the fluid dynamics in shaping the MFC microbiome. MPPT control positively affected bacterial abundance and promoted the selection of putatively exoelectrogenic bacteria in the MFC core microbiome (Sedimentibacter sp. and gammaproteobacteria). These differences in the microbiome may be responsible for the two-fold increase in power production achieved by the MPPT-MFC compared to the Ref-MFC.
Collapse
Affiliation(s)
| | - Lluis Bañeras
- Molecular Microbial Ecology Group, Institute of Aquatic Ecology, University of Girona, Girona, Spain
- * E-mail:
| | - Sebastià Puig
- LEQUiA, Institute of the Environment, University of Girona, Girona, Spain
| | - Daniele Molognoni
- Department of Civil Engineering and Architecture (D.I.C.Ar.), University of Pavia, Pavia, Italy
| | - Albert Vilà-Rovira
- LEQUiA, Institute of the Environment, University of Girona, Girona, Spain
| | - Elena Hernández-del Amo
- Molecular Microbial Ecology Group, Institute of Aquatic Ecology, University of Girona, Girona, Spain
| | - Maria D. Balaguer
- LEQUiA, Institute of the Environment, University of Girona, Girona, Spain
| | - Jesús Colprim
- LEQUiA, Institute of the Environment, University of Girona, Girona, Spain
| |
Collapse
|
29
|
Poirier S, Bize A, Bureau C, Bouchez T, Chapleur O. Community shifts within anaerobic digestion microbiota facing phenol inhibition: Towards early warning microbial indicators? WATER RESEARCH 2016; 100:296-305. [PMID: 27208731 DOI: 10.1016/j.watres.2016.05.041] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 04/27/2016] [Accepted: 05/12/2016] [Indexed: 06/05/2023]
Abstract
Performance stability is a key operational issue for anaerobic digestion (AD) and phenolic compounds are regularly mentioned as a major cause of digester failures. To get more insights into AD microbiota response to a wide range of inhibition levels, anaerobic batch toxicity assays were conducted with ten phenol concentrations up to 5.00 g/L. Final AD performance was not impaired up to 1.00 g/L. However, progressive shifts in microbial community structure were detected from 0.50 g/L. The methanogenic function was maintained along with increasing initial phenol concentrations up to 2.00 g/L thanks to the emergence of genus Methanoculleus at the expense of Methanosarcina. Within syntrophic populations, family Syntrophomonadaceae proportion was gradually reduced by phenol while Synergistaceae gained in importance in the microbiome. Moreover, at 2.00 g/L, the relative abundance of families belonging to order Clostridiales dropped, leading to the predominance of populations assigned to order Bacteroidales even though it did not prevent final AD performance deterioration. It illustrates the high level of adaptability of archaeal and bacterial communities and suggests the possibility of determining early warning microbial indicators associated with phenol inhibition.
Collapse
Affiliation(s)
- Simon Poirier
- Irstea, Hydrosystems and Bioprocesses Research Unit, 1 rue Pierre-Gilles de Gennes, F-92761 Antony, France.
| | - Ariane Bize
- Irstea, Hydrosystems and Bioprocesses Research Unit, 1 rue Pierre-Gilles de Gennes, F-92761 Antony, France.
| | - Chrystelle Bureau
- Irstea, Hydrosystems and Bioprocesses Research Unit, 1 rue Pierre-Gilles de Gennes, F-92761 Antony, France.
| | - Théodore Bouchez
- Irstea, Hydrosystems and Bioprocesses Research Unit, 1 rue Pierre-Gilles de Gennes, F-92761 Antony, France.
| | - Olivier Chapleur
- Irstea, Hydrosystems and Bioprocesses Research Unit, 1 rue Pierre-Gilles de Gennes, F-92761 Antony, France.
| |
Collapse
|
30
|
De Vrieze J, Verstraete W. Perspectives for microbial community composition in anaerobic digestion: from abundance and activity to connectivity. Environ Microbiol 2016; 18:2797-809. [DOI: 10.1111/1462-2920.13437] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Jo De Vrieze
- Center for Microbial Ecology and Technology (CMET), Ghent University; Coupure Links 653 Gent B-9000 Belgium
| | - Willy Verstraete
- Center for Microbial Ecology and Technology (CMET), Ghent University; Coupure Links 653 Gent B-9000 Belgium
- Avecom NV, Industrieweg 122P; Wondelgem 9032 Belgium
| |
Collapse
|
31
|
Keating C, Chin JP, Hughes D, Manesiotis P, Cysneiros D, Mahony T, Smith CJ, McGrath JW, O'Flaherty V. Biological Phosphorus Removal During High-Rate, Low-Temperature, Anaerobic Digestion of Wastewater. Front Microbiol 2016; 7:226. [PMID: 26973608 PMCID: PMC4776080 DOI: 10.3389/fmicb.2016.00226] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Accepted: 02/12/2016] [Indexed: 12/20/2022] Open
Abstract
We report, for the first time, extensive biologically mediated phosphate removal from wastewater during high-rate anaerobic digestion (AD). A hybrid sludge bed/fixed-film (packed pumice stone) reactor was employed for low-temperature (12°C) anaerobic treatment of synthetic sewage wastewater. Successful phosphate removal from the wastewater (up to 78% of influent phosphate) was observed, mediated by biofilms in the reactor. Scanning electron microscopy and energy dispersive X-ray analysis revealed the accumulation of elemental phosphorus (∼2%) within the sludge bed and fixed-film biofilms. 4′, 6-diamidino-2-phenylindole (DAPI) staining indicated phosphorus accumulation was biological in nature and mediated through the formation of intracellular inorganic polyphosphate (polyP) granules within these biofilms. DAPI staining further indicated that polyP accumulation was rarely associated with free cells. Efficient and consistent chemical oxygen demand (COD) removal was recorded, throughout the 732-day trial, at applied organic loading rates between 0.4 and 1.5 kg COD m-3 d-1 and hydraulic retention times of 8–24 h, while phosphate removal efficiency ranged from 28 to 78% on average per phase. Analysis of protein hydrolysis kinetics and the methanogenic activity profiles of the biomass revealed the development, at 12°C, of active hydrolytic and methanogenic populations. Temporal microbial changes were monitored using Illumina MiSeq analysis of bacterial and archaeal 16S rRNA gene sequences. The dominant bacterial phyla present in the biomass at the conclusion of the trial were the Proteobacteria and Firmicutes and the dominant archaeal genus was Methanosaeta. Trichococcus and Flavobacterium populations, previously associated with low temperature protein degradation, developed in the reactor biomass. The presence of previously characterized polyphosphate accumulating organisms (PAOs) such as Rhodocyclus, Chromatiales, Actinobacter, and Acinetobacter was recorded at low numbers. However, it is unknown as yet if these were responsible for the luxury polyP uptake observed in this system. The possibility of efficient phosphate removal and recovery from wastewater during AD would represent a major advance in the scope for widespread application of anaerobic wastewater treatment technologies.
Collapse
Affiliation(s)
- Ciara Keating
- Microbial Ecology Laboratory, Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway Ireland
| | - Jason P Chin
- School of Biological Sciences and the Institute for Global Food Security, The Queen's University of Belfast Belfast, UK
| | - Dermot Hughes
- Microbial Ecology Laboratory, Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway Ireland
| | - Panagiotis Manesiotis
- School of Chemistry and Chemical Engineering, The Queen's University of Belfast Belfast, UK
| | - Denise Cysneiros
- Microbial Ecology Laboratory, Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway Ireland
| | - Therese Mahony
- Microbial Ecology Laboratory, Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway Ireland
| | - Cindy J Smith
- Microbial Ecology Laboratory, Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway Ireland
| | - John W McGrath
- School of Biological Sciences and the Institute for Global Food Security, The Queen's University of Belfast Belfast, UK
| | - Vincent O'Flaherty
- Microbial Ecology Laboratory, Microbiology, School of Natural Sciences and Ryan Institute, National University of Ireland Galway Ireland
| |
Collapse
|
32
|
Kim J, Lee C. Response of a continuous anaerobic digester to temperature transitions: A critical range for restructuring the microbial community structure and function. WATER RESEARCH 2016; 89:241-51. [PMID: 26689661 DOI: 10.1016/j.watres.2015.11.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 11/24/2015] [Accepted: 11/26/2015] [Indexed: 05/03/2023]
Abstract
Temperature is a crucial factor that significantly influences the microbial activity and so the methanation performance of an anaerobic digestion (AD) process. Therefore, how to control the operating temperature for optimal activity of the microbes involved is a key to stable AD. This study examined the response of a continuous anaerobic reactor to a series of temperature shifts over a wide range of 35-65 °C using a dairy-processing byproduct as model wastewater. During the long-term experiment for approximately 16 months, the reactor was subjected to stepwise temperature increases by 5 °C at a fixed HRT of 15 days. The reactor showed stable performance within the temperature range of 35-45 °C, with the methane production rate and yield being maximum at 45 °C (18% and 26% greater, respectively, than at 35 °C). However, the subsequent increase to 50 °C induced a sudden performance deterioration with a complete cessation of methane recovery, indicating that the temperature range between 45 °C and 50 °C had a critical impact on the transition of the reactor's methanogenic activity from mesophilic to thermophilic. This serious process perturbation was associated with a severe restructuring of the reactor microbial community structure, particularly of methanogens, quantitatively as well as qualitatively. Once restored by interrupted feeding for about two months, the reactor maintained fairly stable performance under thermophilic conditions until it was upset again at 65 °C. Interestingly, in contrast to most previous reports, hydrogenotrophs largely dominated the methanogen community at mesophilic temperatures while acetotrophs emerged as a major group at thermophilic temperature. This implies that the primary methanogenesis route of the reactor shifted from hydrogen- to acetate-utilizing pathways with the temperature shifts from mesophilic to thermophilic temperatures. Our observations suggest that a mesophilic digester may not need to be cooled at up to 45 °C in case of undesired temperature rise, for example, by excessive self-heating, which offers a possibility to reduce operating costs.
Collapse
Affiliation(s)
- Jaai Kim
- School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan 689-798, Republic of Korea
| | - Changsoo Lee
- School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Eonyang-eup, Ulju-gun, Ulsan 689-798, Republic of Korea.
| |
Collapse
|
33
|
Regueiro L, Carballa M, Lema JM. Microbiome response to controlled shifts in ammonium and LCFA levels in co-digestion systems. J Biotechnol 2016; 220:35-44. [PMID: 26778540 DOI: 10.1016/j.jbiotec.2016.01.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 11/27/2015] [Accepted: 01/11/2016] [Indexed: 02/04/2023]
Abstract
Anaerobic co-digestion using protein-rich and lipid-rich co-substrates is limited by the accumulation of ammonia and long chain fatty acids (LCFAs), which are important inhibitors of the anaerobic microorganisms. This work aimed to study the microbial community dynamics during gradual and abrupt increase in ammonium and LCFAs concentrations by applying several molecular techniques, as well as during gradual decrease. For this purpose, two anaerobic reactors co-digesting three agro-industrial wastes underwent abrupt and gradual changes of ammonium and LCFAs concentrations. Both variations provoked volatile fatty acids (VFAs) accumulation, mainly acetic acid up to 4.5gL(-1). High ammonium levels were correlated to an increase in Pseudomonadaceae, Carnobacteriaceae and Clostridiadaceae families and to a drop in Syntrophomonadaceae. However, high LCFA levels provoked an increase in the Anaerobaculaceae and Peptococcaceae families. Both perturbations resulted in greater variations in the archaeal domain, going from Methanosaeta dominance in steady state to hydrogenotrophic pathway during the disturbance periods. During the abrupt changes, Bacteria domain experienced a minimal change, which indicates the adaptation bacterial populations to high ammonium and LCFAs levels. Species belonging to Porphyromonadaceae and Tissierellaceae families linked to VFAs consumption rose their presence during the recovery period. This study identifies a subset of microbial communities linked to high ammonia and LCFA concentrations, useful for optimizing the high-rate co-digestion processes dealing with lipid and protein-rich co-substrates.
Collapse
Affiliation(s)
- Leticia Regueiro
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, Rúa Lope Gómez de Marzoa s/n, 15782 Santiago de Compostela, Spain.
| | - Marta Carballa
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, Rúa Lope Gómez de Marzoa s/n, 15782 Santiago de Compostela, Spain.
| | - Juan M Lema
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, Rúa Lope Gómez de Marzoa s/n, 15782 Santiago de Compostela, Spain.
| |
Collapse
|
34
|
Regueiro L, Lema JM, Carballa M. Key microbial communities steering the functioning of anaerobic digesters during hydraulic and organic overloading shocks. BIORESOURCE TECHNOLOGY 2015; 197:208-16. [PMID: 26340029 DOI: 10.1016/j.biortech.2015.08.076] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 08/05/2015] [Accepted: 08/15/2015] [Indexed: 05/16/2023]
Abstract
Overloading is one of the most typical process disturbance in anaerobic digesters, resulting in volatile fatty acids (VFAs) accumulation. This work aimed to study the microbial community dynamics during hydraulic (decreasing the hydraulic retention time (HRT)) and organic (increasing the organic loading rate maintaining the HRT constant) overload shocks in anaerobic reactors treating agro-industrial wastes, as well as during the recovery period. In both cases, the organic loading rate increased from 2 to 10gCODL(-1)d(-1), resulting in VFAs accumulation up to 9gL(-1). Both overloads were correlated to an increase in Bacteroidetes and Actinobacteria phyla and with a drop in Syntrophomonadaceae and Pseudomonadaceae families. In contrast, Tissierellaceae family only increased during the organic shock. Active Archaea decreased in both overloads, going from Methanosaeta dominance to Methanosarcina prevalence. During the recovery period, Porphyromonadaceae family increased its presence and Clostridium genus recovered values prior to perturbation.
Collapse
Affiliation(s)
- Leticia Regueiro
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - Juan M Lema
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Marta Carballa
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| |
Collapse
|
35
|
Carballa M, Regueiro L, Lema JM. Microbial management of anaerobic digestion: exploiting the microbiome-functionality nexus. Curr Opin Biotechnol 2015; 33:103-11. [DOI: 10.1016/j.copbio.2015.01.008] [Citation(s) in RCA: 181] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 01/24/2015] [Accepted: 01/26/2015] [Indexed: 02/04/2023]
|