呼吸仪在评估厨余垃圾高温厌氧消化过程及毒性中的应用

Use of respirometer in evaluation of process and toxicity of thermophilic anaerobic digestion for treating kitchen waste.

作者信息

Kuo Wen-Chien, Cheng Kae-Yiin

机构信息

Department of Environmental Science and Engineering, National Pingtung University of Science and Technology, 1 Hseuh Fu Road, Nei Pu, Pingtung 91207, Taiwan.

出版信息

Bioresour Technol. 2007 Jul;98(9):1805-11. doi: 10.1016/j.biortech.2006.06.016. Epub 2006 Aug 22.

DOI:10.1016/j.biortech.2006.06.016

PMID:16930997

Abstract

A thermophilic anaerobic digestion (TAnD, 55 degrees C) system was adopted to hydrolyze the kitchen waste for 3 days, which was then fermented for a hydraulic retention time (HRT) of 10 days. The TAnD system performed much better than a similar system without thermal pre-treatment. A bubble respirometer was employed to study the effects of thermal pre-treatment, which showed that pre-treatment at 60 degrees C yielded the highest Total COD (TCOD) removal efficiency (79.2%) after 300h reaction. Respirometer results also indicated that oil and grease (O and G) began to inhibit the TAnD system at a concentration of approximately 1000mg/L and the gas production was inhibited by 50% at a concentration of approximately 7500mg/L of sodium.

摘要

采用嗜热厌氧消化（TAnD，55摄氏度）系统对厨余垃圾进行3天的水解，然后在水力停留时间（HRT）为10天的条件下进行发酵。TAnD系统的性能比未进行热预处理的类似系统要好得多。采用气泡呼吸仪研究热预处理的效果，结果表明，在60摄氏度下预处理300小时后，总化学需氧量（TCOD）去除效率最高（79.2%）。呼吸仪结果还表明，油脂（O和G）在浓度约为1000mg/L时开始抑制TAnD系统，在钠浓度约为7500mg/L时产气受到50%的抑制。