中国沼气2025，Vol.43Issue(5)：21-29,9.DOI:10.20022/j.cnki.1000-1166.2025050021
蔬菜废弃物中温厌氧发酵降解过程实验研究
Experimental Study on the Mesophilic Anaerobic Fermentation Degradation Mechanism of Vegetable Wastes
摘要
Abstract
Due to the lack of research on the degradation mechanism of anaerobic fermentation of vegetable waste,the ex-isting large-scale treatment plants of VWs have the problems of unstable system operation and easy acidification because of unclear characteristics of vegetables.Therefore,experimental study has been carried out to reveal degradation mechanism of pressed vegetable waste(PVW),pressed vegetable waste and vegetable waste(PVW+VW),pressed vegetable waste and maize straw(PVW+MS)of mesophilic anaerobic fermentation process in three 560 L anaerobic tanks.pH,volatile fatty acids,volumetric gas production rate,methane kinetics,methane/carbon dioxide content,chemical oxygen demand(COD)and ammonia nitrogen.were investigated to evaluate the stability of the anaerobic fermentation process of VW.The experimental studies showed that:the pH value of the three groups first decreased to 6.4 and then stabilized at about 7.3;the daily gas production reached the peak at about 15 d,when acetic acid accounted for the largest proportion;the volumet-ric gas production rates were 0.26,0.29,and 0.34 L·L-1d-1,respectively;the methanogenic kinetics analysis using the modified Gompertz model showed that the R2 was greater than 0.97;the methane content was greater than 50％at 13 d;COD re-moval rate reached 69％,74％,and 68％on 19 d;and ammonia nitrogen content was always below 1200 mg·L-1.These theoretical and experimental results can provide scientific basis and engineering reference for large-scale VW treatment and utilization.关键词
蔬菜废弃物/中温厌氧发酵/降解特性/中试试验Key words
vegetable wastes/mesophilic anaerobic fermentation/degradation mechanism/pilot experiment分类
能源科技引用本文复制引用
李金平,陈熠菲..蔬菜废弃物中温厌氧发酵降解过程实验研究[J].中国沼气,2025,43(5):21-29,9.基金项目
甘肃省重大科技专项项目(24ZDNA004) （24ZDNA004）
甘肃省高等学校产业支撑计划项目(2022CYZC-28) （2022CYZC-28）
甘肃省科学计划项目(24YFGA061 （）
25JRRA059) （）
甘肃省拔尖领军人才([2024]12) （[2024]12）
现代丝路寒旱农业科技支撑项目(GSLK-2022-19). （GSLK-2022-19）
