Optimization of organic solid waste composting process through iron-related additives: A systematic review

Pan, Chaonan; Yang, Hongyu; Gao, Wenfang; Wei, Zimin; Song, Caihong; Mi, Jiaying

doi:10.1016/j.jenvman.2023.119952

Cited by 17 publications

(1 citation statement)

References 116 publications

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“…While the TOC content in the supernatant fluid of each treatment decreased to varying degrees after incubation due to the adsorption of Maillard precursors by gibbsite, the addition of precursors partially hindered the loss of TOC content in the supernatant fluid. Furthermore, the supplementation of C-containing precursors, in conjunction with the formation of Al-C particles primarily facilitated by the interaction between gibbsite and precursors, demonstrated the ability to impede the loss of TOC content in the supernatant fluid, thereby enhancing C sequestration [28]. Qi et al [12] observed that incorporating catechol into chicken manure composting resulted in a reduction in organic matter loss and an increase in recalcitrant component levels.…”

Section: Discussionmentioning

confidence: 99%

Changes in the Glucose Concentration Affect the Formation of Humic-like Substances in Polyphenol–Maillard Reactions Involving Gibbsite

Wang,

Cui,

Zhou

et al. 2024

Molecules

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The polyphenol–Maillard reaction is considered one of the important pathways in the formation of humic-like substances (HLSs). Glucose serves as a microbial energy source that drives the humification process. However, the effects of changes in glucose, particularly its concentration, on abiotic pathways remain unclear. Given that the polyphenol–Maillard reaction requires high precursor concentrations and elevated temperatures (which are not present in soil), gibbsite was used as a catalyst to overcome energetic barriers. Catechol and glycine were introduced in fixed concentrations into a phosphate-buffered solution containing gibbsite using the liquid shake-flask incubation method, while the concentration of glucose was controlled in a sterile incubation system. The supernatant fluid and HLS components were dynamically extracted over a period of 360 h for analysis, thus revealing the influence of different glucose concentrations on abiotic humification pathways. The results showed the following: (1) The addition of glucose led to a higher degree of aromatic condensation in the supernatant fluid. In contrast, the supernatant fluid without glucose (Glu0) and the control group without any Maillard precursor (CK control group) exhibited lower degrees of aromatic condensation. Although the total organic C (TOC) content in the supernatant fluid decreased in all treatments during the incubation period, the addition of Maillard precursors effectively mitigated the decreasing trend of TOC content. (2) While the C content of humic-like acid (CHLA) and the CHLA/CFLA ratio (the ratio of humic-like acid to fulvic-like acid) showed varying increases after incubation, the addition of Maillard precursors resulted in a more noticeable increase in CHLA content and the CHLA/CFLA ratio compared to the CK control group. This indicated that more FLA was converted into HLA, which exhibited a higher degree of condensation and humification, thus improving the quality of HLS. The addition of glycine and catechol without glucose or with a glucose concentration of 0.06 mol/L was particularly beneficial in enhancing the degree of HLA humification. Furthermore, the presence of glycine and catechol, as well as higher concentrations of glucose, promoted the production of N-containing compounds in HLA. (3) The presence of Maillard precursors enhanced the stretching vibration of the hydroxyl group (–OH) of HLA. After the polyphenol–Maillard reaction of glycine and catechol with glucose concentrations of 0, 0.03, 0.06, 0.12, or 0.24 mol/L, the aromatic C structure in HLA products increased, while the carboxyl group decreased. The presence of Maillard precursors facilitated the accumulation of polysaccharides in HLA with higher glucose concentrations, ultimately promoting the formation of Al–O bonds. However, the quantities of phenolic groups and phenols in HLA decreased to varying extents.

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Section: Discussionmentioning

confidence: 99%

Changes in the Glucose Concentration Affect the Formation of Humic-like Substances in Polyphenol–Maillard Reactions Involving Gibbsite

Wang,

Cui,

Zhou

et al. 2024

Molecules

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Effect of MnO2-biochar composites on promoting humification during chicken manure composting

Qi,

Gao,

Xie

et al. 2024

Biochar

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The present study aimed to accelerate the humification and to investigate how MnO2 modification of biochar (MBC) drives the humus formation during composting with chicken manure. In this study, compared with the control group (CK), the addition of MBC caused an increase in the concentration of both humus and humic acid (HA), with a respective enhancement of 29.1% and 37.2%. In addition, MBC also improved the stability of compost products. Hetero two-dimensional correlation spectra further exhibited that the MBC could alter the formation mechanism of humus fractions during composting. Random forest analysis showed that Microbacterium, Bacteroides, Kroppenstedtia, Gracilibacillus, and Lentibacillus were significantly related to humus formation (P < 0.05). MBC enhanced the absolute abundance of these five genera during composting. The structural equation model further confirmed that these five genera could be indirectly involved in humus formation, through the production of aromatic compounds via secondary metabolism. Additionally, these five genera could directly transform organic components into macromolecular humus structures. Therefore, the increase in these five genera might be a direct response to the acceleration of the humification during MBC composting. These findings demonstrate the potential value of MBC in harmless disposal of hazardous biowastes through composting.Highlights MnO2 modification of biochar changed the formation mechanism of humus fractions. Key genera involved in humus formation were identified. Among of MnO2 modification of biochar, key genera and humus formation were revealed. Graphical Abstract

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Effect of NH4+ and NO3− cooperatively regulated carbon to nitrogen ratio on organic nitrogen fractions during rice straw composting

Sun,

Zhu,

Wang

et al. 2024

Bioresource Technology

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Optimization of organic solid waste composting process through iron-related additives: A systematic review

Cited by 17 publications

References 116 publications

Changes in the Glucose Concentration Affect the Formation of Humic-like Substances in Polyphenol–Maillard Reactions Involving Gibbsite

Changes in the Glucose Concentration Affect the Formation of Humic-like Substances in Polyphenol–Maillard Reactions Involving Gibbsite

Effect of MnO2-biochar composites on promoting humification during chicken manure composting

Effect of NH4+ and NO3− cooperatively regulated carbon to nitrogen ratio on organic nitrogen fractions during rice straw composting

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