Contributions of thermotolerant bacteria to organic matter degradation under a hyperthermophilic pretreatment process during chicken manure composting

Cao, Yun; Wang, Lin; Qian, Yuting; Xu, Yanbin; Wu, Huashan; Zhang, Jing; Huang, Hongying; ZhiZhou, Chang

doi:10.15376/biores.14.3.6747-6766

Cited by 11 publications

(3 citation statements)

References 37 publications

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“…The other one was crushed after air-drying and screened by a 100-mesh sieve, and then kept at −20 • C for further determination. The air-dried and crushed samples were oxidized by potassium dichromate to measure HS, HA and TN using the Kjeldahl method [26]. Loss of TN from the composting piles was estimated according to an equation by a previous study [27].…”

Section: Methodsmentioning

confidence: 99%

Biolysed Sludge Composting for Nitrogen Conservation and Humification Improvements and Mechanisms

Wang

Chen

et al. 2023

Sustainability

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Aerobic composting of conventional municipal sludge has always had the problems of nitrogen loss and low humification. In this study, biolysed sludge (BS), polyacrylamids-added sludge (PS) and Fe (III)/CaO-added sludge (FS) were used for composting, respectively, and their effect on the physical-chemical parameters, nitrogen conversion and humification during composting were investigated. The results showed that the dissolved organic matter (DOM) concentration of the BS pile (23.1 ± 0.4 g/kg) was 48.4% and 48.4% higher than the PS (15.5 ± 0.4 g/kg) and FS piles (15.5 ± 0.0 g/kg) in the initial stage of composting and became the lowest after composting, suggesting that the degradation of DOM was promoted in the BS pile. BS can also increase the retention rate of total nitrogen (TN) (27.8% ± 0.8%), higher than that in PS (22.7% ± 1.1%) and FS (24.6% ± 0.5%), which may be due to the lower production of ammonia nitrogen in the BS pile. Compared with PS and FS, BS provided more humic substance (HS) and humic acid (HA) for composting and the HA contents of the compost products were 34.4 ± 1.0, 35.4 ± 0.2 and 34.0 ± 0.3 mg/g in the PS, BS and FS treated piles, respectively. Fourier transform infrared and the excitation-emission matrix revealed that BS and FS promoted the aromaticity and stability of HA. The degree of polymerization (DP) of the products from the BS (1.48) and FS piles (1.56) was higher than that of the PS pile (1.36). However, the germination index (GI) value (133.4% ± 6.0%) of FS was lower than that of PS (152.3% ± 6.2%) and BS (158.3% ± 0.8%), showing that the products of FS composting contain more plant biotoxicity. Thus, compared with PS and FS, BS can increase the nitrogen retention rate and the maturity of the compost.

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Section: Methodsmentioning

confidence: 99%

Biolysed Sludge Composting for Nitrogen Conservation and Humification Improvements and Mechanisms

Wang

Chen

et al. 2023

Sustainability

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“…Luteimonas is common in soil and marine sediments, but has been described in the gut of poultry and isolated from the wormcast of the earthworm (Eisenia foetida, Savigny) [49,53]. Georgenia is a thermotolerant bacteria that was shown to participate in organic matter degradation during the compositing of chicken manure [54]. Pseudomonas is a genus with 191 species demonstrating a wide array of metabolic capabilities that allows the colonization of diverse environments, mainly soil and aquatic environments, but it has been found in poultry microbiomes [49,55].…”

Section: Spent Beetle: Alpha Diversitymentioning

confidence: 99%

Adult Alphitobius diaperinus Microbial Community during Broiler Production and in Spent Litter after Stockpiling

et al. 2022

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The facilities used to raise broiler chickens are often infested with litter beetles (lesser mealworm, Alphitobius diaperinus). These beetles have been studied for their carriage of pathogenic microbes; however, a more comprehensive microbiome study on these arthropods is lacking. This study investigated their microbial community in a longitudinal study throughout 2.5 years of poultry production and after the spent litter, containing the mealworms, was piled in pastureland for use as fertilizer. The mean most abundant phyla harbored by the beetles in house were the Proteobacteria (39.8%), then Firmicutes (30.8%), Actinobacteria (21.1%), Tenericutes (5.1%), and Bacteroidetes (1.6%). The community showed a modest decrease in Firmicutes and increase in Proteobacteria over successive flock rotations. The beetles were relocated within the spent litter to pastureland, where they were found at least 19 weeks later. Over time in the pastureland, their microbial profile underwent a large decrease in the percent of Firmicutes (20.5%). The lesser mealworm showed an ability to survive long-term in the open environment within the spent litter, where their microbiome should be further assessed to both reduce the risk of transferring harmful bacteria, as well as to enhance their contribution when the litter is used as a fertilizer.

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“…The regulatory effects of H 2 and/or H 2 /CO 2 , together with the lack of added organic substrates, manifested themselves in the genera Ureibacillus (log2FC= −7.6), Lutispora (log2FC= −3.9), Herbinix (log2FC= 2.4), Clostridium (log2FC= −2.3), Bacillus (log2FC= −1.3), Tepidanaerobacter (log2FC= −2.0) among Bacteria. Ureibacilli have been found frequently in thermophilic aerobic poultry waste treatment sites [51]. Similarly, the genera Lysinobacillus and Paenibacillus are typical components of the poultry manure microbiota [52,53].…”

Section: Metagenomic Analysesmentioning

confidence: 99%

Development of Stable Mixed Microbiota for High Yield Power to Methane Conversion

et al. 2021

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The performance of a mixed microbial community was tested in lab-scale power-to-methane reactors at 55 °C. The main aim was to uncover the responses of the community to starvation and stoichiometric H2/CO2 supply as the sole substrate. Fed-batch reactors were inoculated with the fermentation effluent of a thermophilic biogas plant. Various volumes of pure H2/CO2 gas mixtures were injected into the headspace daily and the process parameters were followed. Gas volumes and composition were measured by gas-chromatography, the headspace was replaced with N2 prior to the daily H2/CO2 injection. Total DNA samples, collected at the beginning and end (day 71), were analyzed by metagenome sequencing. Low levels of H2 triggered immediate CH4 evolution utilizing CO2/HCO3− dissolved in the fermentation effluent. Biomethanation continued when H2/CO2 was supplied. On the contrary, biomethane formation was inhibited at higher initial H2 doses and concomitant acetate formation indicated homoacetogenesis. Biomethane production started upon daily delivery of stoichiometric H2/CO2. The fed-batch operational mode allowed high H2 injection and consumption rates albeit intermittent operation conditions. Methane was enriched up to 95% CH4 content and the H2 consumption rate attained a remarkable 1000 mL·L−1·d−1. The microbial community spontaneously selected the genus Methanothermobacter in the enriched cultures.

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Contributions of thermotolerant bacteria to organic matter degradation under a hyperthermophilic pretreatment process during chicken manure composting

Cited by 11 publications

References 37 publications

Biolysed Sludge Composting for Nitrogen Conservation and Humification Improvements and Mechanisms

Biolysed Sludge Composting for Nitrogen Conservation and Humification Improvements and Mechanisms

Adult Alphitobius diaperinus Microbial Community during Broiler Production and in Spent Litter after Stockpiling

Development of Stable Mixed Microbiota for High Yield Power to Methane Conversion

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