首页|Solid waste based manufactured soil - Stabilization of 'organics-microorganisms-inorganic skeleton' and performance evaluation

Solid waste based manufactured soil - Stabilization of 'organics-microorganisms-inorganic skeleton' and performance evaluation

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  • NETL
  • NSTL
  • Elsevier
The safe disposal and utilization of bulk solid waste (SW) are critical challenges. Manufactured soil, a soil-like material composed of SW, offers a novel solution for resource recycling. However, the mechanisms underlying SW-based manufactured soil fertility development remain unclear. This study systematically investigated the performance of SW-based manufactured soil using aerobic compost sludge (ACS-soil) and anaerobic digestion sludge (ADS-soil), focusing on the microbial mechanism which driving manufactured soil fertility development. Results showed that the soil nutrient index (SNI) of SW-based manufactured soil was 5 to 8 times higher than that of natural topsoil. These soils significantly promoted wheatgrass growth. However, ACS-soil exhibited superior fertility and plant performance, maintaining stable nutrient levels, whereas the SNI value and soil pH of ADS-soil decreased by 27.13% and 17.68% respectively. Microbial community analysis revealed that homogeneous selection in ACS-soil drove microbial community succession, maintaining stable nutrition content and increasing humification degree. In ADS-soil, the rich in labile compounds (accounting for 41%) led to lower environmental stress, stochastic processes dominated bacterial succession, which driving declined pH and thus negatively impact the soil fertility. Furthermore, based on life cycle analysis results, using SW to prepare manufactured soils had lower carbon emissions than conventional disposal methods (including safe landfill, incineration and direct land use), which demonstrated that SW-based manufactured soil is a promising method for SW disposal. This research underscores the potential of SW-based manufactured soil for waste disposal and enhanced plant growth, emphasizing the importance of selecting appropriate organic components to optimize soil performance.

Solid wasteManufactured soilSoil-like materialMicroorganismRegulatory mechanism

Jun Chen、Qingyi Li、Jianbo Zhang、Hao Zhou、Siwei Peng、Shufeng Qiao、Hang He、Kewei Li、Dongsheng Wang、Weijun Zhang

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School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China

CAS Key Laboratory of Green Process and Engineering, National Engineering eResearch Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100090, China

Datang Environment Industry Group Co Ltd, Haidian District, Beijing 100097, China

Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China

Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China

School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China||Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science, School of Environmental Studies, China University of Geosciences, Wuhan 430074, Hubei, China||National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

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2025

10.1016/j.wasman.2025.114738

Waste management

Waste management

SCI
ISSN：0956-053X
年,卷(期)：2025.200(Jun.)
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