短程好氧发酵强化餐厨废物厌氧消化性能  

Shortcut Pre-Aeration of Food Waste Enhances Anaerobic Digestion Performance

作　　者：张记市[1] 吕培茹 王钦庆[1] 

机构地区：[1]山东轻工业学院食品与生物工程学院,山东济南250353 [2]山东省建设项目环境受理中心,山东济南250011

出　　处：《化学与生物工程》2013年第7期74-78,共5页Chemistry & Bioengineering

基　　金：山东省高校科技计划项目(J09LB11);济南市高校院所自主创新计划项目(201004035)

摘　　要：研究了短程好氧预处理提高餐厨废物高温厌氧消化性能。结果表明:短程好氧发酵减少了餐厨废物中多余的易酸化和易降解的有机物,增强了高温厌氧反应的稳定性,提高了产气量和消化效率;同时,必须防止过度好氧发酵以免过多地消耗底物和降低产气量。餐厨废物经过12h好氧处理的厌氧消化过程稳定性能最好、累积产气量达到最大值29 928mL,较直接厌氧消化提高了26%。厌氧消化动力学研究表明,短程好氧发酵6h、12h、24h、48h和72h的餐厨废物的厌氧反应速率常数分别为0.145d-1、0.143d-1、0.140d-1、0.175d-1和0.182d-1。A shortcut pre-aeration step was investigated as pre-treatment for thermophilic anaerobic digestion of food waste（FW）. Shortcut pre-aeration reduced excess easily degradable organic compounds in FW, which were the common cause of acidification during the start-up of the batch system,and enhanced the stabili- ty of thermophilic anaerobic reaction with biogas production and digestion efficiency increasing. Careful consid- eration however must be taken to avoid over aeration as this consumes substrate,which would otherwise be available to methanogens to produce biogas. After pre-aeration of FW for 12 h, biogas production increased 26 %, being the most biogas production （29 928 mL） of all others in their anaerobic process. The rate constants of anaerobic process on FW pre-aerated for 6 h,12 h,24 h,48 h and72 h were 0. 145 d-1,0. 143 d^-1,0. 140 d^-1, 0. 175 d^-1 and 0. 182 d^-1 ,respectively.

关 键 词：餐厨废物 好氧发酵 厌氧消化 动力学 

分 类 号：X705[环境科学与工程—环境工程]