短程好氧发酵强化餐厨废物厌氧消化性能

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29928mL，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。

Shortcut Pre-Aeration of Food Waste Enhances Anaerobic Digestion Performance

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.