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Xiang F, Han L, Jiang S, Xu X, Zhang Z. Black soldier fly larvae mitigate greenhouse gas emissions from domestic biodegradable waste by recycling carbon and nitrogen and reconstructing microbial communities. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:33347-33359. [PMID: 38676863 DOI: 10.1007/s11356-024-33308-8] [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: 02/02/2024] [Accepted: 04/10/2024] [Indexed: 04/29/2024]
Abstract
Black soldier fly larvae have been proven to reduce greenhouse gas emissions in the treatment of organic waste. However, the microbial mechanisms involved have not been fully understood. The current study mainly examined the dynamic changes of carbon and nitrogen, greenhouse gas emissions, the succession of microbial community structure, and changes in functional gene abundance in organic waste under larvae treatment and non-aeration composting. Thirty percent carbon and 55% nitrogen in the organic waste supplied were stored in larvae biomass. Compared to the non-aeration composting, the larvae bioreactor reduced the proportion of carbon and nitrogen converted into greenhouse gases (CO2, CH4, and N2O decreased by 62%, 87%, and 95%, respectively). 16S rRNA sequencing analysis indicated that the larvae bioreactor increased the relative abundance of Methanophaga, Marinobacter, and Campylobacter during the bioprocess, enhancing the consumption of CH4 and N2O. The metagenomic data showed that the intervention of larvae reduced the ratio of (nirK + nirS + nor)/nosZ in the residues, thereby reducing the emission of N2O. Larvae also increased the functional gene abundance of nirA, nirB, nirD, and nrfA in the residues, making nitrite more inclined to be reduced to ammonia instead of N2O. The larvae bioreactor mitigated greenhouse gas emissions by redistributing carbon and nitrogen and remodeling microbiomes during waste bioconversion, giving related enterprises a relative advantage in carbon trading.
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Affiliation(s)
- FangMing Xiang
- College of Environmental and Resource Sciences, Zhejiang University, YuHangTang Ave 866, Hangzhou, 310058, People's Republic of China
- JiaXing FuKang Biotechnology Company Limited, TongXiang Economic HiTech Zone, Building 1-19#, Development Ave 133, Tongxiang, 314515, People's Republic of China
| | - LuYing Han
- College of Environmental and Resource Sciences, Zhejiang University, YuHangTang Ave 866, Hangzhou, 310058, People's Republic of China
| | - ShuoYun Jiang
- College of Environmental and Resource Sciences, Zhejiang University, YuHangTang Ave 866, Hangzhou, 310058, People's Republic of China
- HangZhou GuSheng Technology Company Limited, XiangWang Ave 311118, Hangzhou, 311121, People's Republic of China
| | - XinHua Xu
- College of Environmental and Resource Sciences, Zhejiang University, YuHangTang Ave 866, Hangzhou, 310058, People's Republic of China
| | - ZhiJian Zhang
- College of Environmental and Resource Sciences, Zhejiang University, YuHangTang Ave 866, Hangzhou, 310058, People's Republic of China.
- China Academy of West Region Development, Zhejiang University, YuHangTang Ave 866, Hangzhou, 310058, People's Republic of China.
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Lim J, Wehmeyer H, Heffner T, Aeppli M, Gu W, Kim PJ, Horn MA, Ho A. Resilience of aerobic methanotrophs in soils; spotlight on the methane sink under agriculture. FEMS Microbiol Ecol 2024; 100:fiae008. [PMID: 38327184 PMCID: PMC10872700 DOI: 10.1093/femsec/fiae008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 01/19/2024] [Accepted: 02/06/2024] [Indexed: 02/09/2024] Open
Abstract
Aerobic methanotrophs are a specialized microbial group, catalyzing the oxidation of methane. Disturbance-induced loss of methanotroph diversity/abundance, thus results in the loss of this biological methane sink. Here, we synthesized and conceptualized the resilience of the methanotrophs to sporadic, recurring, and compounded disturbances in soils. The methanotrophs showed remarkable resilience to sporadic disturbances, recovering in activity and population size. However, activity was severely compromised when disturbance persisted or reoccurred at increasing frequency, and was significantly impaired following change in land use. Next, we consolidated the impact of agricultural practices after land conversion on the soil methane sink. The effects of key interventions (tillage, organic matter input, and cover cropping) where much knowledge has been gathered were considered. Pairwise comparisons of these interventions to nontreated agricultural soils indicate that the agriculture-induced impact on the methane sink depends on the cropping system, which can be associated to the physiology of the methanotrophs. The impact of agriculture is more evident in upland soils, where the methanotrophs play a more prominent role than the methanogens in modulating overall methane flux. Although resilient to sporadic disturbances, the methanotrophs are vulnerable to compounded disturbances induced by anthropogenic activities, significantly affecting the methane sink function.
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Affiliation(s)
- Jiyeon Lim
- Institute for Microbiology, Leibniz Universität Hannover, Herrenhäuser Str. 2, 30419 Hannover, Germany
| | - Helena Wehmeyer
- Nestlè Research, Route du Jorat 57, CH 1000 Lausanne 26, Switzerland
| | - Tanja Heffner
- Institute for Microbiology, Leibniz Universität Hannover, Herrenhäuser Str. 2, 30419 Hannover, Germany
| | - Meret Aeppli
- Environmental Engineering Institute IIE-ENAC, Laboratory SOIL, Ecole Polytechnique Fédérale de Lausanne (EPFL), Valais Wallis, CH 1950 Sion, Switzerland
| | - Wenyu Gu
- Environmental Engineering Institute IIE-ENAC, Laboratory MICROBE, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH 1015 Lausanne, Switzerland
| | - Pil Joo Kim
- Division of Applied Life Science, Gyeongsang National University, Jinju 660-701, Republic of Korea
| | - Marcus A Horn
- Institute for Microbiology, Leibniz Universität Hannover, Herrenhäuser Str. 2, 30419 Hannover, Germany
| | - Adrian Ho
- Nestlè Research, Route du Jorat 57, CH 1000 Lausanne 26, Switzerland
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