中国沼气2025，Vol.43Issue(6)：61-67,7.DOI:10.20022/j.cnki.1000-1166.2025060061
热水解对餐厨垃圾厌氧消化和脱水的影响
Impact of Thermal Hydrolysis on the Anaerobic Digestion and Dehydration of Food Waste
摘要
Abstract
To evaluate the effects of thermal hydrolysis on anaerobic digestion and dewatering performance of food waste,this study conducted thermal hydrolysis experiments at 130℃～170 ℃,followed by mesophilic anaerobic digestion and plate-frame dewatering tests.The results demonstrated that under an organic loading rate(OLR)of 3.14 gVS·L-1 d-1,un-treated food waste failed to achieve stable anaerobic digestion,with biogas production per unit total solids(TS)as low as＜399 L·kg-1TS.In contrast,sludge treated at 130℃ and 140 ℃ exhibited biogas yields of 778 and 788 L·kg-1TS,re-spectively,while maintaining stable anaerobic digestion conditions(pH 7.6～7.8,VFAs＜603 mg·L-1).However,when the temperature reached 150 ℃,the proportion of recalcitrant chemical oxygen demand(RCOD)exceeded 60.8％,lead-ing to reduced biogas yields.Sludge treated at 150 ℃ and 160 ℃ showed biogas yields of 711 and 724 L·kg-1TS,respec-tively,while a drastic decline to 280 L·kg-1TS occurred at 170 ℃.Kinetic analysis revealed that the activation energy of protein hydrolysis(48.26 kJ·mol-1)was significantly higher than that of carbohydrates(11.56 kJ·mol-1),indicating greater temperature sensitivity of proteins.Additionally,thermal hydrolysis at 150 ℃ and above significantly improved dew-aterability,reducing the moisture content of dewatered cakes to 74.3％～76.0％,whereas the control group failed to form dewatered cakes.This study provides a theoretical foundation for optimizing thermal hydrolysis processes in food waste treat-ment.关键词
难降解有机物/活化能/稳定性/沼气产率/含水率Key words
recalcitrant organic matter/activation energy/stability/biogas yield/moisture content分类
农业科技引用本文复制引用
REN Zhengran,GAO Jinhua,WANG Jiawei,WEN Yang,ZHANG Han..热水解对餐厨垃圾厌氧消化和脱水的影响[J].中国沼气,2025,43(6):61-67,7.基金项目
北京城市排水集团内部课题(BPJ201913-2025) （BPJ201913-2025）
