Effect of Fenton pretreatment combined with bacterial inoculation on humification characteristics of dissolved organic matter during rice straw composting

Qu, Fengting; Wu, Di; Li, Dan; Zhao, Yue; Zhang, Ruju; Qi, Haishi; Chen, Xiaomeng

doi:10.1016/j.biortech.2021.126198

Cited by 41 publications

(12 citation statements)

References 13 publications

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“…Zn mainly existed in the form of F2 during composting (Fig. 3), which was identical with other research results (Guo et al 2021;Chen et al 2022). Compared with CK composting, embedded materials reduced the distribution proportion of the acid-soluble fraction of Zn (ZnF1) and increased the proportion of the reducible fraction of Zn (ZnF2).…”

Section: Changes In Heavy Metal Content and Speciation During Compostingsupporting

confidence: 89%

“…Chicken manure and corn straw were mixed to make the C/N value reach about 25 (Wu et al 2017). The mixed pollution of Cu and Zn was taken as the stress condition of heavy metals in this study because Cu and Zn were the main heavy metals in chicken manure (Chen et al 2022). The addition amount was confirmed based on the approximate content of Cu and Zn after chicken manure composting (Cu 2+ : 200 mg/kg and Zn 2+ : 400 mg/ kg).…”

Section: Implementation Of Composting Testmentioning

confidence: 99%

“…To meet the uniform distribution of nylon mesh bags in the composting reactor and ensure that biochar can fully contact with composting materials, the 10 nylon mesh bags containing corresponding materials were added to each reactor, and evenly placed in the compost materials. The device was a special cylindrical reactor (Chen et al 2022). Each treatment had three parallels, for a total of 12 reactors.…”

Section: Implementation Of Composting Testmentioning

confidence: 99%

“…Composting has the characteristics of simple operation and is environmentfriendly, so the technology is widely applied to the comprehensive utilization of livestock manure (Zhang et al 2020;Qian et al 2018). Composting can degrade organic substances in manure and transform them into more valuable humus substances (Li et al 2021a;Qu et al 2022). Meanwhile, pathogenic bacteria are killed in the thermophilic phase of composting (Gou et al 2018;Mishra et al 2022), and most pollutants such as antibiotics and polycyclic aromatic hydrocarbons can also be biodegraded, thereby obtaining more valuable and less toxic organic fertilizers (Congilosi and Aga 2021).…”

Section: Introductionmentioning

confidence: 99%

“…The organically bound heavy metals were mostly combined with humus substances to realize heavy metal passivation (Zhang et al 2017). In addition, heavy metal ions added to composting could also be quickly transformed into the carbonatebound state, and mitigated the toxicity of heavy metals (Chen et al 2022). Nevertheless, the passivation efficiency of heavy metals was at a relatively low level during composting.…”

Section: Introductionmentioning

confidence: 99%

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Biochar mitigates the biotoxicity of heavy metals in livestock manure during composting

Chen

Liú

et al. 2022

Biochar

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The addition of biochar could mitigate the bioavailability of heavy metals during livestock manure composting. However, the main action mechanism of biochar, such as how it worked, was ambiguous. Therefore, in this study, materials (biochar, alkali modified biochar, pretreated cotton ball) were added by embedding with nylon mesh bags to explore the adsorption performance of added materials and its influence on the composting process. The results showed that embedded materials promoted the formation of humic acid and reduced the distribution proportion of bioavailable fraction of heavy metals during composting (Cu: at least 15.72%; Zn: at least 33.44%). The surface of biochar extracted from composting contained attachments, however, the attachment of heavy metal was not detected and functional groups on the materials did no change significantly. This indicated that the addition of biochar did not directly adsorb heavy metals. Most notably, the microbial network changed after embedding materials, and the succession of microbial community promoted the formation of humic acid. Ultimately, structural equation models verified that embedded materials promoted the formation of humic acid through stable microbial groups, thereby accelerating the passivation of heavy metals during composting. This study provides theoretical and technical supports for mitigating the biotoxicity of heavy metals by biochar during composting. Graphical Abstract

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Section: Changes In Heavy Metal Content and Speciation During Compostingsupporting

confidence: 89%

Section: Implementation Of Composting Testmentioning

confidence: 99%

Section: Implementation Of Composting Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Biochar mitigates the biotoxicity of heavy metals in livestock manure during composting

Chen

Liú

et al. 2022

Biochar

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Ca(H2PO4)2 and MgSO4 activated nitrogen-related bacteria and genes in thermophilic stage of compost

Jiang,

Dai,

Wang

et al. 2024

Appl Microbiol Biotechnol

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This study was conducted to investigate the effects of Ca(H2PO4)2 and MgSO4 on the bacterial community and nitrogen metabolism genes in the aerobic composting of pig manure. The experimental treatments were set up as control (C), 1% Ca(H2PO4)2 + 2% MgSO4 (CaPM1), and 1.5% Ca(H2PO4)2 + 3% MgSO4 (CaPM2), which were used at the end of composting for potting trials. The results showed that Ca(H2PO4)2 and MgSO4 played an excellent role in retaining nitrogen and increasing the alkali-hydrolyzed nitrogen (AN), available phosphorus (AP), and available potassium (AK) contents of the composts. Adding Ca(H2PO4)2 and MgSO4 changed the microbial community structure of the compost. The microorganisms associated with nitrogen retention were activated. The complexity of the microbial network was enhanced. Genetic prediction analysis showed that the addition of Ca(H2PO4)2 and MgSO4 reduced the accumulation of nitroso-nitrogen and the process of denitrification. At the same time, despite the reduction of genes related to nitrogen fixation, the conversion of ammonia to nitrogenous organic compounds was promoted and the stability of nitrogen was increased. Mantel test analysis showed that Ca(H2PO4)2 and MgSO4 can affect nitrogen transformation-related bacteria and thus indirectly affect nitrogen metabolism genes by influencing the temperature, pH, and organic matter (OM) of the compost and also directly affected nitrogen metabolism genes through PO43− and Mg2+. The pot experiment showed that composting with 1.5% Ca(H2PO4)2 + 3% MgSO4 produced the compost product that improved the growth yield and nutrient content of cilantro and increased the fertility of the soil. In conclusion, Ca(H2PO4)2 and MgSO4 reduces the loss of nitrogen from compost, activates nitrogen-related bacteria and genes in the thermophilic phase of composting, and improves the fertilizer efficiency of compost products. Key points • Ca(H2PO4)2 and MgSO4 reduced the nitrogen loss and improved the compost effect • Activated nitrogen-related bacteria and altered nitrogen metabolism genes • Improved the yield and quality of cilantro and fertility of soil

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A review of additives use in straw composting

Piao

et al. 2023

Environ Sci Pollut Res

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Effect of Fenton pretreatment combined with bacterial inoculation on humification characteristics of dissolved organic matter during rice straw composting

Cited by 41 publications

References 13 publications

Biochar mitigates the biotoxicity of heavy metals in livestock manure during composting

Biochar mitigates the biotoxicity of heavy metals in livestock manure during composting

Ca(H2PO4)2 and MgSO4 activated nitrogen-related bacteria and genes in thermophilic stage of compost

A review of additives use in straw composting

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