Mechanism analysis of humification coupling metabolic pathways based on cow dung composting with ionic liquids

Yang, Hongxiang; Ma, Liangcai; Fu, Mengxin; Li, Kecheng; Li, Yinzhong; Li, Qunliang

doi:10.1016/j.jenvman.2022.116426

Cited by 20 publications

(5 citation statements)

References 48 publications

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“…Among them, Proteobacteria and Actinobacteria effectively degrade fibrous substances (Bonelli et al, 2020;Zhang et al, 2016), therefore, the abundance is higher in T3-T5 with higher lignocellulosic content (Figure . 5A). In addition, the microorganisms from these two phyla make important contributions to carbohydrate metabolism and amino acid metabolism respectively, which promote the formation of humic acid (Yang et al, 2023)，this is also consistent with the high humic content of T3-T5 in this study (Figure . 5A).…”

Section: Main Influence Factors In Residuessupporting

confidence: 88%

Bioconversion of spent mushroom substrate and wet distiller's grains by black soldier fly larvae: effect of substrates on larval treatment and residues

Wei,

Li,

Khan

et al. 2024

Preprint

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Spent mushroom substrate (SMS) and wet distiller's grains (WDG) are growing organic wastes. The black soldier fly larvae (BSFL) can convert multiple organic wastes. However, there is limited information on their conversion by BSFL. Therefore, this study explores the conversion of SMS and WDG of five proportions by BSFL. This study shows that BSFL can convert SMS, WDG and their mixtures, 100% WDG is suitable for the growth of the BSFL. BSFL can promote the humification of the substrate during the treatment process, increasing the content of total kjeldahl nitrogen, total organic carbon, total phosphorus and total potassium in the residues. The fractionation mode of carbon and nitrogen elements and the microbial community in residue is obviously different, but that is closely relates to the physicochemical parameters and the microbial community of the substrate. The mixture treated by BSFL is helpful to form a residue with higher humus, but it may be unstable.

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Section: Main Influence Factors In Residuessupporting

confidence: 88%

Bioconversion of spent mushroom substrate and wet distiller's grains by black soldier fly larvae: effect of substrates on larval treatment and residues

Wei,

Li,

Khan

et al. 2024

Preprint

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“…During the thermophilic stage, the bacterial community structure in PM and CD changed significantly, with an increase in the relative abundance of Firmicutes and Parcubacteria and a significant decrease in the relative abundance of Proteobacteria, similar to previous reports ( Zhang et al, 2021 ). In SM, Firmicutes replaced the dominance of Proteobacteria (27.9–66.1%) after the thermophilic phase, which may be due to the high cellulose content of sheep manure and the important role of Firmicutes in cellulose decomposition ( Yang et al, 2023 ). In addition, Proteobacteria, Firmicutes, Actinobacteria, Bacteroidetes, and Chloroflexi occupied more than 60% of the total bacterial phyla in chicken and duck manure composting, which is in line with previous reports in poultry manure compost ( Zhang et al, 2018 ).…”

Section: Resultsmentioning

confidence: 99%

“…Humus formation is affected by multiple metabolisms of microbial communities, such as citrate-cycle, pentose phosphate pathway, pyruvate metabolism, etc. ( Yang et al, 2023 ) and potentially regulated by microbial community succession and interaction ( Zhan et al, 2023 ). In recent years, network analysis among microbial species and physicochemical properties has become an important approach to determine the role of microorganisms in composting ( Yu et al, 2023 ), which is widely used to understand the interaction of microbial community, the release of metabolites, cellulose degradation, and humus synthesis ( Zheng et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Comparing bacterial dynamics for the conversion of organics and humus components during manure composting from different sources

Li,

Chang

et al. 2023

Front. Microbiol.

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The study aimed to compare the differences in organic fractions transformation, humus components and bacterial community dynamics during manure composting from different sources, and to identify the key biotic and abiotic factors driving the humification process. Five types of manure [pig manure (PM), cow dung (CD), sheep manure (SM), chicken manure (CM), and duck manure (DM)] were used as raw materials for 30 days composting. The results showed the obvious difference of organic fractions decomposition with more cellulose degradation in CD and SM composting and more hemicellulose degradation in PM and CM composting. Composting of PM and CD contained significantly higher humus fractions than the other composts. Fluorescence spectra indicated that SM composting tended to form structurally stable humic acid fractions, while CM and DM tended to form structurally complex fulvic acid fractions. Pearson correlation analysis showed that humification process of composts in category A (PM, CD) with higher humification degree than category B (SM, CM, and DM) was positively correlated with lignin and hemicellulose degradation. Bioinformatics analysis found that Lysinibacillus promoted the degradation of hemicellulose and the conversion of fulvic to humic acid in the composts of category A, and in category B, Thermobifida, Lactobacillus, and Ureibacillus were key genera for humic acid formation. Network analysis indicated that bacterial interaction patterns had obvious differences in composting with different humus and humification levels.

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“…Figure 4b,c shows that concentrations of NO 3 − -N and NO 2 − -N in the three treatments were lower than the concentrations of NH 4 + -N during the whole composting stage, indicating that inorganic nitrogen mainly existed in the form of NH 4 + -N in the composting process. From days 23 to 33, the NO 3 − -N concentrations increased with the decrease in composting temperature, which was attributed to recovery of nitrifying bacteria [13]. NO 2 − -N concentrations of all treatments were gradually decreased throughout the whole composting.…”

Section: Nitrogen Conversion Indexmentioning

confidence: 91%

“…Determining humification degree is essential for evaluating compost quality. Humic substances (HS) obtained by aerobic compost can be used to remediate soil and improve soil fertility and humic acid (HA) and fulvic acid (FA) are essential components of HS [12,13]. HA, which is composed of aliphatic and aromatic compounds, holds a high aromatic polymerization.…”

Section: Introductionmentioning

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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Mechanism analysis of humification coupling metabolic pathways based on cow dung composting with ionic liquids

Cited by 20 publications

References 48 publications

Bioconversion of spent mushroom substrate and wet distiller's grains by black soldier fly larvae: effect of substrates on larval treatment and residues

Bioconversion of spent mushroom substrate and wet distiller's grains by black soldier fly larvae: effect of substrates on larval treatment and residues

Comparing bacterial dynamics for the conversion of organics and humus components during manure composting from different sources

Biolysed Sludge Composting for Nitrogen Conservation and Humification Improvements and Mechanisms

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