Insight into the dynamic microbial community and core bacteria in composting from different sources by advanced bioinformatics methods

Zhan, Yabin; Chang, Yuan; Tao, Yueyue; Zhang, Hao; Lin, Yongfeng; Deng, Jie; Ma, Tao; Ding, Guo-Chun; Wei, Yuquan; Li, Ji

doi:10.1007/s11356-022-20388-7

Cited by 26 publications

(9 citation statements)

References 40 publications

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“…The above-mentioned rapid increase in NH 4 + concentrations in the initial phase along with lower temperatures (25–50 °C on d 1–3) provided optimal conditions for autotrophic (at temperatures < 40 °C) and heterotrophic nitrification (at temperatures > 40 °C) 51 . The latter is more likely to be the prevalent microbial process potentially responsible for N 2 O production in the compost pile 55 given the temperature range recorded (> 40 °C) (Fig. 3 a).…”

Section: Discussionmentioning

confidence: 97%

Assessing the climate change mitigation potential from food waste composting

Pérez

Vergara

Silver

2023

Sci Rep

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Food waste is a dominant organic constituent of landfills, and a large global source of greenhouse gases. Composting food waste presents a potential opportunity for emissions reduction, but data on whole pile, commercial-scale emissions and the associated biogeochemical drivers are lacking. We used a non-invasive micrometeorological mass balance approach optimized for three-dimensional commercial-scale windrow compost piles to measure methane (CH4), nitrous oxide (N2O), and carbon dioxide (CO2) emissions continuously during food waste composting. Greenhouse gas flux measurements were complemented with continuous oxygen (O2) and temperature sensors and intensive sampling for biogeochemical processes. Emission factors (EF) ranged from 6.6 to 8.8 kg CH4–C/Mg wet food waste and were driven primarily by low redox and watering events. Composting resulted in low N2O emissions (0.01 kg N2O–N/Mg wet food waste). The overall EF value (CH4 + N2O) for food waste composting was 926 kgCO2e/Mg of dry food waste. Composting emissions were 38–84% lower than equivalent landfilling fluxes with a potential net minimum savings of 1.4 MMT CO2e for California by year 2025. Our results suggest that food waste composting can help mitigate emissions. Increased turning during the thermophilic phase and less watering overall could potentially further lower emissions.

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Section: Discussionmentioning

confidence: 97%

Assessing the climate change mitigation potential from food waste composting

Pérez

Vergara

Silver

2023

Sci Rep

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“…However, the main challenge in refining food and agricultural waste material is their heterogeneous chemical composition, which varies depending on source, region, and seasons and ability to support the growth of specific microbial groups (Ren et al 2018 , Sindhu et al 2019 , Mengqi et al 2023 ). In addition, food and agricultural waste has often low pH (< 4.0) possibly caused by anaerobic fermentation during storage and transport but also during controlled bioprocess development (Zhan et al 2022 ). Starter cultures can direct the bioprocess into the desired metabolic conversion, but the substrate must be usually pretreated using high temperature, UV or chemicals, to inhibit or suppress the natural microbiota, a step that represents a cost burden in waste material valorization (Sharma et al 2020a ).…”

Section: Exploiting Low Ph In Waste Management and In The Revalorizat...mentioning

confidence: 99%

Exploitation of microbial activities at low pH to enhance planetary health

Atasoy,

Álvarez Ordóñez,

Cenian

et al. 2023

FEMS Microbiology Reviews

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Awareness is growing that human health cannot be considered in isolation but is inextricably woven with the health of the environment in which we live. It is however under-recognised that the sustainability of human activities strongly relies on preserving the equilibrium of the microbial communities living in/on/around us. Microbial metabolic activities are instrumental for production, functionalization, processing and preservation of food. For circular economy, microbial metabolism would be exploited to produce building blocks for the chemical industry, to achieve effective crop protection, agri-food waste revalorization or biofuel production, as well as in bioremediation and bioaugmentation of contaminated areas. Low pH is undoubtedly a key physical-chemical parameter that needs to be considered for exploiting the powerful microbial metabolic arsenal. Deviation from optimal pH conditions has profound effects on shaping the microbial communities responsible for carrying out essential processes. Furthermore, novel strategies to combat contaminations and infections by pathogens rely on microbial-derived acidic molecules that suppress/inhibit their growth. Herein, we present the state-of-the-art of the knowledge on the impact of acidic pH in many applied areas and how this knowledge can guide us to use the immense arsenal of microbial metabolic activities for their more impactful exploitation in a Planetary Health perspective.

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“…The microorganisms observed in livestock excrements include viruses, prokaryotes, and eukaryotes. Being the majority in terms of the total number of species and microorganisms, prokaryotic microorganisms including bacteria and archaea accounting for over 95% of the residing microorganisms, among which archaea comprise only 0.3% to 3% [ 31 , 32 ], while eukaryotes include protozoa and fungi only account for less than 5% [ 33 ].…”

Section: Features Of the Microbiome Of Livestock Excrement And Microb...mentioning

confidence: 99%

Microbial Risks Caused by Livestock Excrement: Current Research Status and Prospects

Abdugheni,

Li,

Yang

et al. 2023

Microorganisms

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Livestock excrement is a major pollutant yielded from husbandry and it has been constantly imported into various related environments. Livestock excrement comprises a variety of microorganisms including certain units with health risks and these microorganisms are transferred synchronically during the management and utilization processes of livestock excrement. The livestock excrement microbiome is extensively affecting the microbiome of humans and the relevant environments and it could be altered by related environmental factors as well. The zoonotic microorganisms, extremely zoonotic pathogens, and antibiotic-resistant microorganisms are posing threats to human health and environmental safety. In this review, we highlight the main feature of the microbiome of livestock excrement and elucidate the composition and structure of the repertoire of microbes, how these microbes transfer from different spots, and they then affect the microbiomes of related habitants as a whole. Overall, the environmental problems caused by the microbiome of livestock excrement and the potential risks it may cause are summarized from the microbial perspective and the strategies for prediction, prevention, and management are discussed so as to provide a reference for further studies regarding potential microbial risks of livestock excrement microbes.

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Insight into the dynamic microbial community and core bacteria in composting from different sources by advanced bioinformatics methods

Cited by 26 publications

References 40 publications

Assessing the climate change mitigation potential from food waste composting

Assessing the climate change mitigation potential from food waste composting

Exploitation of microbial activities at low pH to enhance planetary health

Microbial Risks Caused by Livestock Excrement: Current Research Status and Prospects

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