Exploring the microbial mechanism of reducing methanogenesis during dairy manure membrane-covered aerobic composting at industrial scale

Chen, Fang; Su, Ya; Liang, Yuying; Han, Lujia; He, Xueqin; Huang, Guangqun

doi:10.1016/j.biortech.2022.127214

Cited by 16 publications

(5 citation statements)

References 42 publications

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“…Additionally, the semi-permeable membrane had the effect of heat preservation, resulting in the pile could maintain high temperatures for a long time. High temperatures can effectively kill pathogenic bacteria [18] , so the fermentation products have a certain level of safety. As the water backs up under the membrane, the MC of the two groups of piles changed little throughout the fermentation process (Figure 1b).…”

Section: Physicochemical Propertiesmentioning

confidence: 99%

Succession of bacteria communities during production and application of dairy bedding by membrane-covered aerobic fermentation�

Yin,

Zeng,

Fang

et al. 2024

International Journal of Agricultural and Biological Engineering

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The cost of dairy manure treatment and bedding material purchase increases the operating cost of the dairy farm. Membrane-covered aerobic fermentation system has been widely used for dealing with dairy manure and recycling the final product as bedding material. However, the microbial safety in each processing step is still uncertain. To better understand the bacterial community dynamics during the whole bedding conversion process, a full-chain and large-scale experiment including 16-day membrane-covered aerobic fermentation and 11-day bedding material application was conducted. The results showed that the pile temperatures in the fermentation stage rapidly increased to 80°C and maintained >50°C for more than 11 d and the use of fermentation product as bedding material provided cows with a stable and comfortable bedding environment. The Chao1 and Shannon index decreased at the end of the fermentation stage and remained stable in the application stage, indicating that membrane-covered aerobic fermentation effectively killed some pathogenic bacteria and guaranteed both the maturity and stability of the final product. The dominant bacteria in the fermentation stage were Acinetobacter, Thermus, and Rhodothermus at genus level. Seven common potential pathogens of mastitis (Staphylococcus, Enterococcus, Serratia, Pseudomonas, Corynebacterium, Mycobacterium, and Bacillus) were found at the end of fermentation stage but the relative abundance was low (0.0025%-0.2727%). The dominant bacteria in the application stage mainly included Acinetobacter, Pseudomonas, and Flavobacterium at the genus level. The relative abundance of Pseudomonas increased in the application stage, which was a reminder to the dairy farm to pay attention to the disinfection and timely replacement of bedding material to prevent the occurrence of dairy mastitis. The results of this study contributed deep understanding of the microorganism-driven bedding conversion process and provide practical guidance and cautions for the bedding materials application.

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Section: Physicochemical Propertiesmentioning

confidence: 99%

Succession of bacteria communities during production and application of dairy bedding by membrane-covered aerobic fermentation�

Yin,

Zeng,

Fang

et al. 2024

International Journal of Agricultural and Biological Engineering

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“…The raw sludge was obtained from the sludge dewatering room located in Hongsha sewage treatment plant (Sanya, China). The sludge was enriched by aerating intermittently for over 20 d to inactivate the hydrogen-consuming microorganisms, especially methanogens [8]. After enough enrichment, the sludge was inoculated into the anaerobic reactor.…”

Section: Inoculums and Substratesmentioning

confidence: 99%

Energy Recovery from Herbal Wastewater and Monosodium Glutamate Wastewater through Anaerobic Co-Digestion

et al. 2023

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Anaerobic continuous stirring tank reactor (CSTR) was employed for biohydrogen production by anaerobic co-digestion from the mixture of herbal wastewater (HW) and monosodium glutamate wastewater (MGW). A series of blend volumetric proportions (MGW/HW), organic loading rates (OLR) were used as control strategy and evaluated for optimal biohydrogen production. The highest biohydrogen production of 7260±7.7 mL L-1 d-1 was attained at blend proportion of 15%, OLR of 41 g COD L-1 d-1 while the highest biohydrogen yield of 508.9±7.2 mL g CODremoved-1 was observed at same conditions. This study demonstrated the feasibility and effectiveness of enhanced biohydrogen production by adding MGW to compensate the low nitrogen content of HW.

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“…Animal manure is valuable renewable resource due to having the abundant organic matter ( Liu et al, 2021 ; Fang et al, 2022 ). The annual production of livestock manure only in China has reached 3.8 billion tons ( Guo et al, 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Effects of microbial inoculant and additives on pile composting of cow manure

Yang

Zhang²,

Li³

et al. 2023

Front. Microbiol.

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Composting is an effective method of recycling organic solid waste, and it is the key process linking planting with recycling. To explore the reuse of agricultural organic solid waste as a resource in the Yellow River Delta, the effects of microbial inoculant and different additives (calcium superphosphate, biochar, tomato straw, rice husk, and sugar residue) on pile composting of cow dung were studied to obtain the best composting conditions. The results showed that microbial inoculant and additives all played positive roles in the process of aerobic composting, and the experimental groups outperformed the control groups without any additives. For discussion, the microbial inoculant promoted rapid pile body heating more than the recovery materials alone, and the effects on aerobic composting were related to the organic matter of substrates and biochar. After being composted, all the materials were satisfactorily decomposed. Degradation of additives into humic acid might serve as electron shuttles to promote thorough organic matter decomposition. These results provide a scientific basis data for industrial composting of organic solid waste processed by on-site stacking, and provide a reference for researcher and practitioners for studying the applications of microbial inoculant on aerobic composting.

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Exploring the microbial mechanism of reducing methanogenesis during dairy manure membrane-covered aerobic composting at industrial scale

Cited by 16 publications

References 42 publications

Succession of bacteria communities during production and application of dairy bedding by membrane-covered aerobic fermentation�

Succession of bacteria communities during production and application of dairy bedding by membrane-covered aerobic fermentation�

Energy Recovery from Herbal Wastewater and Monosodium Glutamate Wastewater through Anaerobic Co-Digestion

Effects of microbial inoculant and additives on pile composting of cow manure

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