Bacterial dynamics for gaseous emission and humification during bio-augmented composting of kitchen waste with lime addition for acidity regulation

Cui, Qi; Yin, Rongrong; Cheng, Jingwen; Xu, Zhicheng; Chen, Jie; Gao, Xingzu; Li, Guoxue; Nghiem, Long D.; Luo, Wenhai

doi:10.1016/j.scitotenv.2022.157653

Cited by 37 publications

(12 citation statements)

References 68 publications

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“…The results were supported by the observation by Zhou et al (2022) and Sun et al (2020) who found that MPs (PE, polyvinyl chloride (PVC), and polyhydroxyalkanoate (PHA)) inhibited compost humification in the initial 30 days during the composting period. Previously, many studies have explored the impacts on DOM structures in the compositing system brought by natural substances. , Ren et al (2020) showed that by enhancing composting conditions, natural clay promoted the decomposition of tyrosine and tryptophan and the formation of humic-like substances and thus increased humification. Similarly, Wang et al (2017) found that medical stone strongly increased the formation of humic acid.…”

Section: Resultsmentioning

confidence: 99%

“…Previously, many studies have explored the impacts on DOM structures in the compositing system brought by natural substances. 59,60 Ren et al (2020) 59 showed that by enhancing composting conditions, natural clay promoted the decomposition of tyrosine and tryptophan and the formation of humic-like substances and thus increased humification. Similarly, Wang et al (2017) 61 found that medical stone strongly increased the formation of humic acid.…”

Section: Microplastics Affected the Aromatization And Humification Pr...mentioning

confidence: 99%

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Unraveling the Effect of Continuously Accumulating Microplastics on the Humification of Dissolved Organic Matter in the Composting System

Chen

Feng

et al. 2023

ACS EST Eng.

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Microplastics (MPs) accumulation in composting systems has received considerable attention in recent years. However, the ecological risk of MPs on composting environments remains scarcely explored. This study investigated the impact of polyethylene and polyethylene terephthalate MPs on the structural evolution of dissolved organic matter (DOM) during composting. The ultraviolet, excitation–emission matrix, and Fourier transform ion cyclotron resonance mass spectroscopy collectively suggested that MPs caused DOM of compost to have lower aromaticity and fewer humic acid-like substances, particularly at the early stage of composting. This inhibition effect of MPs on the aromatization of DOM of compost was proved to result from not only the altered compost characteristics (e.g., lower pH and temperature relative to the control) but also the preferential sorption of specific DOM compositions by MPs. The sorption of DOM by MPs before and after composting showed that the protein-like components and microbial by-product analogues, which were significant substrates for humification, were found to be preferentially sorbed by two MPs and thus were prevented from being directly humified by some microorganisms. The finding would contribute to an in-depth explanation of the mechanisms by which MPs affect compost humification and provide insight into the ecological risks of MPs for composting environments.

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Section: Resultsmentioning

confidence: 99%

Section: Microplastics Affected the Aromatization And Humification Pr...mentioning

confidence: 99%

Unraveling the Effect of Continuously Accumulating Microplastics on the Humification of Dissolved Organic Matter in the Composting System

Chen

Feng

et al. 2023

ACS EST Eng.

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“…Moisture content was measured by heating fresh compost samples in an oven at 105 °C to a constant weight (approximately 8 h). Water and salt extraction of the fresh samples was conducted using deionized water and potassium chloride (2 M) at the wet weight of 1:10, respectively . Water extraction was used for the measurement of pH, electrical conductivity (EC), and GI.…”

Section: Methodsmentioning

confidence: 99%

“…Water and salt extraction of the fresh samples was conducted using deionized water and potassium chloride (2 M) at the wet weight of 1:10, respectively. 16 Water extraction was used for the measurement of pH, electrical conductivity (EC), and GI. The pH and EC were monitored using a pH/EC meter (OHAUS, China).…”

Section: 2mentioning

confidence: 99%

Role of Lignocellulosic Biomass Composition to Regulate Microbial Mutualism for Organic Mineralization and Humification during Digestate Composting

Gao,

Xu,

Shi

et al. 2024

ACS EST Eng.

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This study investigated the performance of lignocellulosic wastes to regulate microbial interactions to improve the composting of digestate from the anaerobic digestion of food waste regarding organic mineralization and humification. Garden waste, rice husk, and cornstalks with diverse lignocellulosic biomass compositions and structures were representatively selected for comparison. High-throughput sequencing was integrated with a modular network analysis to decipher microbial community structures and their interactions. Results showed that mixing 15% of cornstalks and garden waste with digestate (wet weight) was more effective than rice husk to enrich functional microbes (e.g., Tepidimicrobium and Mortierella) to promote the microbial interkingdom for lignocellulosic degradation and humus formation. In particular, a stronger bacterial intrakingdom mutualism was observed with cornstalk addition to facilitate the progressive succession of bacteria in digestate from anaerobic to aerobic and thus inhibit the activities of anaerobic and denitrifying microbes to reduce the emissions of methane and nitrous oxide by 14.2−49.1%. Furthermore, garden waste with more lignin could effectively strengthen intrakingdom mutualism within fungi and their interkingdom interaction with bacteria to mitigate organic carbon mineralization and reduce carbon dioxide emission by 39.8−42.7%. By contrast, rice husk weakened microbial interkingdom mutualisms to retard organic biodegradation and humification during digestate composting. Results from this study provided fundamental understanding on selecting lignocellulosic wastes to regulate organic biotransformation and to improve humification and simultaneously mitigate gaseous emissions in digestate composting.

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“…As mineral additives, lime and zeolite behave like typical physical additives, providing improved pore structure to a composting pile and allowing microbial aerobic respiration [ 73 ]. An increase in NH3 volatilization may be due to the alkalization of the composting pile by dissolved lime [ 119 ]. Alkaline environments enhance the conversion of unstable ammonium nitrogen to NH 3 , which can be attributed to other mineral additives, such as montmorillonite [ 120 ].…”

Section: Control Strategy For Gaseous Emissionsmentioning

confidence: 99%

Measures for Controlling Gaseous Emissions during Composting: A Review

Chen

et al. 2023

IJERPH

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Composting is a promising technology for treating organic solid waste. However, greenhouse gases (methane and nitrous oxide) and odor emissions (ammonia, hydrogen sulfide, etc.) during composting are practically unavoidable, leading to severe environmental problems and poor final compost products. The optimization of composting conditions and the application of additives have been considered to mitigate these problems, but a comprehensive analysis of the influence of these methods on gaseous emissions during composting is lacking. Thus, this review summarizes the influence of composting conditions and different additives on gaseous emissions, and the cost of each measure is approximately evaluated. Aerobic conditions can be achieved by appropriate process conditions, so the contents of CH4 and N2O can subsequently be effectively reduced. Physical additives are effective regulators to control anaerobic gaseous emissions, having a large specific surface area and great adsorption performance. Chemical additives significantly reduce gaseous emissions, but their side effects on compost application must be eliminated. The auxiliary effect of microbial agents is not absolute, but is closely related to the dosage and environmental conditions of compost. Compound additives can reduce gaseous emissions more efficiently than single additives. However, further study is required to assess the economic viability of additives to promote their large-scale utilization during composting.

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Bacterial dynamics for gaseous emission and humification during bio-augmented composting of kitchen waste with lime addition for acidity regulation

Cited by 37 publications

References 68 publications

Unraveling the Effect of Continuously Accumulating Microplastics on the Humification of Dissolved Organic Matter in the Composting System

Unraveling the Effect of Continuously Accumulating Microplastics on the Humification of Dissolved Organic Matter in the Composting System

Role of Lignocellulosic Biomass Composition to Regulate Microbial Mutualism for Organic Mineralization and Humification during Digestate Composting

Measures for Controlling Gaseous Emissions during Composting: A Review

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