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Zhuravleva EA, Shekhurdina SV, Laikova A, Kotova IB, Loiko NG, Popova NM, Kriukov E, Kovalev AA, Kovalev DA, Katraeva IV, Vivekanand V, Awasthi MK, Litti YV. Enhanced thermophilic high-solids anaerobic digestion of organic fraction of municipal solid waste with spatial separation from conductive materials in a single reactor volume. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 363:121434. [PMID: 38861886 DOI: 10.1016/j.jenvman.2024.121434] [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: 02/08/2024] [Revised: 05/22/2024] [Accepted: 06/07/2024] [Indexed: 06/13/2024]
Abstract
Despite benefits such as lower water and working volume requirements, thermophilic high solids anaerobic digestion (THSAD) often fails due to the rapid build-up of volatile fatty acids (VFAs) and the associated drop in pH. Use of conductive materials (CM) can promote THSAD through stimulation of direct interspecies electron transfer (DIET), while the need for their constant dosing due to poor separation from effluent impairs economic feasibility. This study used an approach of spatially separating magnetite and granular activated carbon (GAC) from the organic fraction of municipal solid waste (OFMSW) in a single reactor for THSAD. GAC and magnetite addition could both mitigate the severe inhibition of methanogenesis after VFAs build-up to ∼28-30 g/L, while negligible methane production was observed in the control group. The highest methane yield (286 mL CH4/g volatile solids (VS)) was achieved in magnetite-added reactors, while the highest maximum CH4 production rates (26.38 mL CH4/g VS/d) and lowest lag-phase (2.83 days) were obtained in GAC-added reactors. The enrichment of GAC and magnetite biofilms with various syntrophic and potentially electroactive microbial groups (Ruminiclostridium 1, Clostridia MBA03, Defluviitoga, Lentimicrobiaceae) in different relative abundances indicates the existence of specific preferences of these groups for the nature of CM. According to predicted basic metabolic functions, CM can enhance cellular processes and signals, lipid transport and metabolism, and methane metabolism, resulting in improved methane production. Rearrangement of metabolic pathways, formation of pili-like structures, enrichment of biofilms with electroactive groups and a significant improvement in THSAD performance was attributed to the enhancement of the DIET pathway. Promising results obtained in this work due to the spatial separation of the bulk OFMSW and CM can be useful for modeling larger-scale THSAD systems with better recovery of CM and cost-effectiveness.
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Affiliation(s)
- Elena A Zhuravleva
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 let Oktjabrja pr-t, 7, bld. 2 117312 Moscow, Russia.
| | - Svetlana V Shekhurdina
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 let Oktjabrja pr-t, 7, bld. 2 117312 Moscow, Russia.
| | - Aleksandra Laikova
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 let Oktjabrja pr-t, 7, bld. 2 117312 Moscow, Russia.
| | - Irina B Kotova
- Department of Biology, Lomonosov Moscow State University, Vorob'jovy gory, 119899 Moscow, Russia.
| | - Natalia G Loiko
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 let Oktjabrja pr-t, 7, bld. 2 117312 Moscow, Russia.
| | - Nadezhda M Popova
- Frumkin Institute of Physical Chemistry and Electrochemistry RAS, 31, bld.4, Leninsky prospect, 119071 Moscow, Russia.
| | - Emil Kriukov
- Sechenov First Moscow State Medical University, 8-2 Trubetskaya str. 119435 Moscow, Russia.
| | - Andrey A Kovalev
- Federal Scientific Agroengineering Center VIM, 1st Institutsky proezd, 5,109428 Moscow, Russia.
| | - Dmitriy A Kovalev
- Federal Scientific Agroengineering Center VIM, 1st Institutsky proezd, 5,109428 Moscow, Russia.
| | - Inna V Katraeva
- Department of Water Supply, Sanitation, Engineering Ecology and Chemistry, Nizhny Novgorod State University of Architecture and Civil Engineering, Nizhny Novgorod, 603000, Russia.
| | - Vivekanand Vivekanand
- Centre for Energy and Environment, Malaviya National Institute of Technology Jaipur, Jaipur, 302017, Rajasthan, India.
| | - Mukesh Kumar Awasthi
- College of Natural Resources and Environmental, Northwest A&F University, Taicheng Road 3#, Yangling, Shaanxi, 71200, China.
| | - Yuriy V Litti
- Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 60 let Oktjabrja pr-t, 7, bld. 2 117312 Moscow, Russia.
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Zheng X, Zhou W, Min B, Zhou Y, Xie L. Impact of carbon monoxide on performance and microbial community of extreme-thermophilic hydrogenotrophic methanation in horizontal rotary bioreactor. BIORESOURCE TECHNOLOGY 2023:129248. [PMID: 37247793 DOI: 10.1016/j.biortech.2023.129248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/25/2023] [Accepted: 05/26/2023] [Indexed: 05/31/2023]
Abstract
A novel horizontal rotary bioreactor was developed for upgrading biogas from coke oven gas at extreme-thermophilic condition. The introduction of CO decreased the outlet methane content from 80% to 50% due to insufficient H2. This hindrance was overcome by increasing the proportion of incoming hydrogen, coupled with a prolonged gas retention time from 24 to 72 h, leading to a restoration of methane content to 91.6%. Notably, CO and CO2 exhibited a competitive relationship to hydrogen, which was determined by their contents. The substitution of Methanothermobacter for Methanobacterium as the dominant genus was observed at 70°C, with relative abundance exceeding 98%. Incorporation of CO increased bacteria diversity and fostered a syntrophic relationship between the bacterial community and M. thermautotrophicus. This study provides both theoretical basis and practical support for biogas upgrading from coke oven gas using a biofilm reactor, thus aiding its future industrialization prospects.
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Affiliation(s)
- Xiaomei Zheng
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Wenjing Zhou
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Bolin Min
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Yuanyuan Zhou
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Chengdu institute of planning&design, Chengdu, 610000, China
| | - Li Xie
- Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China; College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
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