A review of the definition, influencing factors, and mechanisms of rapid composting of organic waste

Yin, Jun; Xie, Mengjie; Yu, Xiaoqin; Feng, Huajun; Wang, Meizhen; Zhang, Yanfeng; Chen, Ting

doi:10.1016/j.envpol.2023.123125

Cited by 7 publications

(1 citation statement)

References 85 publications

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“…With the rapid development of society and the exponential growth of the population, the amount of solid waste has also increased significantly, making it a global issue 1 . According to reports, it is expected that 3.4 billion tons of solid waste will be generated annually by 2050, with organic waste accounting for the majority at around 46% 2 .…”

Section: Introductionmentioning

confidence: 99%

Thermophilic-mesophilic temperature phase anaerobic co-digestion compared with single phase co-digestion of sewage sludge and food waste

Hu,

Shen

2024

Sci Rep

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Anaerobic co-digestion is an effective method for addressing the issue of a single substrate not being able to achieve optimal conditions for anaerobic digestion. By adjusting the mixture ratio of sewage sludge and food waste to achieve the optimal carbon to nitrogen ratio, the effectiveness of thermophilic–mesophilic temperature phase anaerobic co-digestion (TPAcD) was evaluated in comparison to single phase mesophilic anaerobic co-digestion (MAcD) and thermophilic anaerobic co-digestion (TAcD). The results indicated that TPAcD increased methane yield by 50.3% and 32.7% compared to MAcD and TAcD, respectively. The variation in VFA, pH, and ammonia nitrogen levels demonstrated that TPAcD combines the advantages of both MAcD and TAcD, with a higher hydrolysis rate in the early stage under thermophilic conditions (55 °C) and a suitable environment in the later stage under mesophilic conditions (35 °C). The kinetic parameters of anaerobic co-digestions also demonstrated that TPAcD performs better. Therefore, further research on TPAcD of sewage sludge and food waste is warranted due to its significant improvements in methane production rate, total methane yield, and system stability. Additionally, TPAcD contributes to reducing carbon emissions and supports the realization of “carbon neutrality”.

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Section: Introductionmentioning

confidence: 99%

Thermophilic-mesophilic temperature phase anaerobic co-digestion compared with single phase co-digestion of sewage sludge and food waste

Hu,

Shen

2024

Sci Rep

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Bioconversion of organic wastes: treatment sludges, animal manures, and agricultural wastes

Ucaroglu,

Ozbek

2024

Biomass Conv. Bioref.

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This study aimed to investigate the compostability of treatment sludge and to determine the effects of adding different animal manures (cattle, pig, horse, and chicken) and agricultural waste (sunflower stalks) on the composting process. Five different compost reactors (M1, M2, M3, M4, and M5) were operated. Sunflower stalks were added to all reactors as a bulking agent at the rate of 20%. Treatment sludge (80%) and bulking agent were added to the M1 reactor, where animal manure was not added, while 40% treatment sludge and 40% animal manure were added to the other reactors. In the reactors where animal manure was added, cattle (M2), pig (M3), horse (M4), and chicken (M5) manure were used, respectively. The temperature, pH, electrical conductivity, organic matter (OM), carbon to nitrogen ratio (C/N), total Kjeldahl nitrogen, and total phosphorus were monitored during the 21-day process. The highest OM loss (64.8%) occurred in the M2 reactor, and the maximum temperature (62.7 °C) was achieved. The high temperatures reached in the reactor increased microbial activity, resulting in rapid decomposition of OM and elimination of pathogens. With a maximum reduction in the C/N ratio (40%), carbon and nitrogen balance was achieved, thus obtaining a more stable and higher quality compost for plants in this reactor. In the M1 reactor, where only treatment sludge was composted, lower microbiological activity occurred compared to the other mixtures due to the lack of substrate. It can be said that composting treatment sludge together with animal manures will provide higher quality end products.

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Essential role of composting industry in achieving China’s dual-carbon goals: Case studies from Chinese composting companies

Hang,

Wang,

Wei

et al. 2024

Bioresource Technology

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A review of the definition, influencing factors, and mechanisms of rapid composting of organic waste

Cited by 7 publications

References 85 publications

Thermophilic-mesophilic temperature phase anaerobic co-digestion compared with single phase co-digestion of sewage sludge and food waste

Thermophilic-mesophilic temperature phase anaerobic co-digestion compared with single phase co-digestion of sewage sludge and food waste

Bioconversion of organic wastes: treatment sludges, animal manures, and agricultural wastes

Essential role of composting industry in achieving China’s dual-carbon goals: Case studies from Chinese composting companies

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