Humification and maturation of kitchen waste during indoor composting by individual households

Gao, Xingzu; Yang, Feiyu; Yan, Zhaowei; Zhao, Jun; Li, Shiyu; Nghiem, Long D.; Li, Guoxue; Luo, Wenhai

doi:10.1016/j.scitotenv.2021.152509

Cited by 28 publications

(9 citation statements)

References 25 publications

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“…In Tables 6 and 7 are shown the agronomic characteristics and the main maturity and stability properties, respectively, of the final composts obtained. The EC values in the final composts were in the range of 3.2 dS m −1 (compost 3) to 7.4 dS m −1 (compost 6) (Table 6), these values being similar to those found in previous works with OFSMW [24,30]. Although Storino et al [35] established that the addition of poultry manure to the co-composting of OFMSW with urban pruning waste did not increase the salinity of the final compost, in the present experiment, the addition of donkey manure to the mixture caused an increase in the EC of the final compost from 3.5, 5.3 and 5.3 to 5.3, 6.1 and 7.4 dS m −1 in the piles 4, 5 and 6 of Carrícola (Table 6), respectively.…”

Section: Agronomic Valuesupporting

confidence: 88%

“…The evolution of the temperature in all the composting heaps showed a rapid increase during the first week of the process, reaching thermophilic values higher than 60 • C (Figure 1). The temperature increase during the composting process is associated with heat production produced by organic matter biodegradation [24]. Thus, a rapid increase in temperature indicates a high availability of nutrients for the microorganisms involved in the composting process [25].…”

Section: Thermal Profile Of the Composting Heapsmentioning

confidence: 99%

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Municipal Solid Waste Management in a Decentralized Composting Scenario: Assessment of the Process Reproducibility and Quality of the Obtained Composts

Álvarez-Alonso,

Pérez-Murcia,

Sánchez-Méndez

et al. 2023

Agronomy

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Over the last several years, the models for organic waste management have changed to implement circular economy in the productive cycle. In this context, new scenarios have emerged, where the management of different organic waste streams by composting is conducted with decentralized models that manage organic wastes in a more local way. However, in these new models, the standardization of the process control and of the end-product characteristics is necessary to guarantee the quality and agronomic value of the compost obtained, avoiding potential risks for human health and the environment. Thus, the aim of this work was to study two different scenarios of community composting of the organic fraction of municipal solid waste separately collected in order to guarantee the effectiveness and reproducibility of the composting processes and the quality of the composts obtained. For this, the development of the process and the characteristics of the composts at agronomic, hygienic–sanitary and environmental levels were assessed in real conditions and during three cycles of the process. The results obtained show high similarity among the different composting cycles, indicating an important degree of reproducibility among the processes. In addition, the composts obtained showed a good sanitary quality, absence of phytotoxicity and low contents of potentially toxic elements, which guarantee their use in agriculture without posing any risk to human health and to the environment.

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Section: Agronomic Valuesupporting

confidence: 88%

Section: Thermal Profile Of the Composting Heapsmentioning

confidence: 99%

Municipal Solid Waste Management in a Decentralized Composting Scenario: Assessment of the Process Reproducibility and Quality of the Obtained Composts

Álvarez-Alonso,

Pérez-Murcia,

Sánchez-Méndez

et al. 2023

Agronomy

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“…Air-dried and powdered compost samples were used to measure the contents of lignocellulose and humus based on the method reported by Xu et al 21 and Gao et al 22 Compost samples were blended with a mixed solution (0.1 mol•L −1 sodium hydroxide and sodium pyrophosphate) at a mass ratio of 1:20 and centrifuged at 180 rpm for 30 min and then at 4000 rpm for 20 min for humus extraction. Such a procedure was repeated four times to ensure the complete extraction of humic substances.…”

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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“…Therefore, it is essential to enhance soil fertility and functionality by applying some fertilizers, such as chemical fertilizers, homemade composts or commercial organic fertilizers (Lal, 2020;Shrestha et al, 2020;Dorr et al, 2023). For cutbacks in expense of chemical fertilizers and organic composts used for HFG, many urban gardeners opt to prepare small-scale home composts themselves (Gao et al, 2022). Biodegradable kitchen waste, such as meat or fish scraps, and urban green waste, such as fallen leaves and chopped grasses, can be transformed into valuable assets through the production of home-made composts.…”

Section: Ordinary Home Composting and Black Soldier Fly Larvae-based ...mentioning

confidence: 99%

Home food gardening in modern cities: advances, issues, and future perspectives

Xu,

Lin,

Wang

et al. 2024

Front. Sustain. Food Syst.

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Against the backdrop of the unexpected COVID-19 epidemic, governments are facing significant challenges in mobilizing food resources, particularly fresh products. It is inevitable that there will be intermittent shortages of food during the pandemic. As a result, home food gardening has gained considerable attention from city residents and policymakers in modern cities. This is due to its potential to provide food during humanitarian emergencies and lockdown. Moreover, home food gardening is increasingly becoming a popular recreational activity in many countries, offering therapeutic benefits such as fostering social bonds through knowledge-sharing and fruit-sharing, improving mental and psychological well-being, promoting outdoor physical exercise, and strengthening the connection between humans and nature. This review provides a comprehensive summary of the latest advancements in home food gardening, including cultivated species, devices, technologies, and current issues. It also proposes perspectives based on current researches to serve as a reference for future research and development.

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Humification and maturation of kitchen waste during indoor composting by individual households

Cited by 28 publications

References 25 publications

Municipal Solid Waste Management in a Decentralized Composting Scenario: Assessment of the Process Reproducibility and Quality of the Obtained Composts

Municipal Solid Waste Management in a Decentralized Composting Scenario: Assessment of the Process Reproducibility and Quality of the Obtained Composts

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

Home food gardening in modern cities: advances, issues, and future perspectives

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