数字农科院2.0

Characterizing Food Waste Anaerobic Digestate Residue as a Soil Amendment with Low Ammonia Emission in Comparison to Landfill

文献类型： 外文期刊

作者： Zhou, Weijun;Zhong, Dongliang;Huang, Yunfeng;Fang, Xuejuan;Alami, Mohammad Jawad;Cui, Shenghui;Gao, Bing

作者机构：

关键词： Characterizing Food;;Anaerobic Digestate Residue;;Soil Amendment

期刊名称： COMPOST SCIENCE & UTILIZATION

ISSN： 1065-657X

年卷期： 2025 年

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： The recycling and utilization of food waste is a matter of public concern. Food waste residue can be used as biofertilizer in agricultural applications. To investigate the resource and environmental impacts of food waste anaerobic digestate (FWD) through resourceful utilization and traditional disposal processes, we measured ammonia (NH3) emissions during both the composting and field application stages of FWD. Additionally, NH3 emissions during FWD landfilling were quantified for comparison with the composting process. Four treatments were applied to fields: 100% chemical fertilizer N (CN), conventional 30% chicken manure N and 70% chemical fertilizer N (CMN+CN), 30% FWD N and 50% chemical fertilizer N (FWD+CN), and 20% FWD N and 10% FWD biochar N and 50% chemical fertilizer N (FWD+FWDB+CN). The results showed that FWD composting treatment recovered 84.9% of N and almost all P and K from the FWD, whereas NH3 emissions were 10.4% lower than those observed following FWD landfilling treatment. In the field application stage, the FWD+CN treatment resulted in a reduction of NH3 emissions by 29.3% and 26.5%, while significantly increasing the second-season lettuce yield by 50.0% and 26.2%, relative to the CN and CMN+CN treatments, respectively. Therefore, using FWD residue as an organic fertilizer is a promising resource utilization method for minimizing waste, increasing crop yield, and creating a sustainable food system nutrient cycle.

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