Liu Juan, Shen Yujun, Ding Jingtao, Luo Wenhai, Zhou Haibin, Cheng Hongsheng, Wang Huihui, Zhang Xi, Wang Jian, Xu Pengxiang, Cheng Qiongyi, Ma Shuangshuang, Chen Kun
Institute of Energy and Environmental Protection, Academy of Agricultural Planning & Engineering, Ministry of Agriculture and Rural Affairs, Beijing 100125, China; Key Laboratory of Technologies and Models for Cyclic Utilization from Agricultural Resources, Ministry of Agriculture and Rural Affairs, Beijing 100125, China.
College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China.
Bioresour Technol. 2023 May;376:128832. doi: 10.1016/j.biortech.2023.128832. Epub 2023 Mar 6.
Composting is an effective technology to realize resource utilization of food waste in rural China. However, high oil content in food waste limits composting humification. This study investigated the effects of blended plant oil addition at different proportions (0, 10, 20, and 30%) on the humification of food waste composting. Oil addition at 10%-20% enhanced lignocellulose degradation by 16.6%-20.8% and promoted humus formation. In contrast, the high proportion of oil (30%) decreased the pH, increased the electrical conductivity, and reduced the seed germination index to 64.9%. High-throughput sequencing showed that high oil inhibited the growth and reproduction of bacteria (Bacillus, Fodinicurvataceae, and Methylococcaceae) and fungi (Aspergillus), attenuated their interaction, thus, reducing the conversion of organic matter, such as lignocellulose, fat, and total sugar, to humus, consequently leading to negative impacts on composting humification. The results can guide composting parameter optimization and improve effective management of rural food waste.
堆肥是中国农村实现食物垃圾资源利用的有效技术。然而，食物垃圾中的高油含量限制了堆肥腐殖化。本研究调查了添加不同比例（0%、10%、20%和30%）混合植物油对食物垃圾堆肥腐殖化的影响。添加10%-20%的油可使木质纤维素降解提高16.6%-20.8%，并促进腐殖质形成。相比之下，高比例的油（30%）降低了pH值，增加了电导率，并使种子发芽指数降至64.9%。高通量测序表明，高油含量抑制了细菌（芽孢杆菌属、弯曲杆菌科和甲基球菌科）和真菌（曲霉属）的生长和繁殖，减弱了它们之间的相互作用，从而减少了木质纤维素、脂肪和总糖等有机物向腐殖质的转化，进而对堆肥腐殖化产生负面影响。研究结果可为堆肥参数优化提供指导，并改善农村食物垃圾的有效管理。
