College of Environmental and Resource Sciences, ZheJiang University, YuHangTang Ave 688, HangZhou, ZheJiang Province, 310058, PR China.
Sancun Village Cooperative in Gaoqiao Town, Tongxiang County, Zhejiang Province, 310045, PR China.
J Environ Manage. 2024 Nov;370:122373. doi: 10.1016/j.jenvman.2024.122373. Epub 2024 Sep 7.
The management of rural waste, particularly agri-food waste, poses a major challenge to the ecosystem health. This study investigated the efficacy of black soldier fly larvae (Hermetia illucens L., BSFL) bioconversion for agri-food waste under independent treatment or co-treatment strategies using chicken manure and food waste as a model system. The results showed a synergistic effect of co-treating agri-food waste from different sources. The co-treatment strategy enhanced bioconversion efficiency, resulting in a 1.31-fold waste reduction rate and a 1.93-fold bioconversion rate. Additionally, larval growth performance and biomass quality of BSFL were improved, while lauric acid and oleic acid were enriched in the larval fat from the co-treatment strategy. 16S rRNA amplicon sequencing revealed that the co-treatment strategy reshaped both the residue and larval gut microbiota, with distinct enrichment of taxonomical biomarkers. Furthermore, under this strategy, metabolic functions of the residue microbiota were significantly activated, especially carbohydrate, amino acid, and lipid metabolism were enhanced by 16.3%, 23.5%, and 20.2%, respectively. The early colonization of lactic acid bacteria (Weisella and Aerococcus) in the residue, coupled with a symbiotic relationship between Enterococcus in the larval gut and the host, likely promoted organic matter degradation and larval growth performance. Scaling up the findings to a national level in China suggests that the co-treatment strategy can increase waste reduction quantity by 86,329 tonnes annually and produce more larval protein and fat with a market value of approximately US$237 million. Therefore, co-treatment of agri-food waste streams using BSFL presents a sustainable solution for rural waste management that potentially contributes to the achievement of SDG2 (Zero Hunger), SDG3 (Good Health and Well-Being), and SDG12 (Responsible Consumption and Production).
农村废物管理，特别是农业食品废物，对生态系统健康构成重大挑战。本研究调查了在独立处理或共同处理策略下，使用鸡粪和食物垃圾作为模型系统，黑蝇幼虫（Hermetia illucens L.，BSFL）生物转化农业食品废物的效果。结果表明，来自不同来源的农业食品废物的共同处理具有协同作用。共同处理策略提高了生物转化效率，废物减少率提高了 1.31 倍，生物转化率提高了 1.93 倍。此外，BSFL 的幼虫生长性能和生物质质量得到提高，而来自共同处理策略的幼虫脂肪中富含月桂酸和油酸。16S rRNA 扩增子测序显示，共同处理策略重塑了残余物和幼虫肠道微生物群，分类生物标志物明显富集。此外，在这种策略下，残余物微生物群的代谢功能显著激活，特别是碳水化合物、氨基酸和脂质代谢分别提高了 16.3%、23.5%和 20.2%。残余物中乳酸菌（魏斯氏菌和气球菌）的早期定植，加上幼虫肠道中肠球菌与宿主之间的共生关系，可能促进了有机质降解和幼虫生长性能。将这些发现推广到中国的全国水平表明，共同处理策略每年可增加 86329 吨的废物减少量，并生产更多具有约 2.37 亿美元市场价值的幼虫蛋白质和脂肪。因此，使用 BSFL 共同处理农业食品废物流为农村废物管理提供了一种可持续的解决方案，可能有助于实现可持续发展目标 2（零饥饿）、3（良好健康与福祉）和 12（负责任的消费和生产）。
