搅拌与曝气对间歇式发酵罐中生活污水污泥生物转化的影响

Effect of agitation and aeration on bioconversion of domestic wastewater sludge in a batch fermenter.

作者信息

Alam Md Zahangir, Fakhru'l-Razi A

机构信息

Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, Selangor DE.

出版信息

J Environ Sci Health A Tox Hazard Subst Environ Eng. 2002;37(6):1087-97. doi: 10.1081/ese-120004525.

DOI:10.1081/ese-120004525

PMID:12090282

Abstract

Effects of agitation and aeration rate on microbial treatment of domestic wastewater sludge were investigated in a batch fermenter using mixed culture of Penicillium corylophilum and Aspergillus niger. It was found that liquid state bioconversion (LSB) of wastewater sludge was highly influenced by the effects of agitation and aeration. The maximum production of sludge cake and reduction of organic substances in treated sludge were recorded at 150-200 rpm of agitation speed and 0.5 vvm of aeration rate after 72 h of treatment. No effective results were observed at higher rate of agitation (300 rpm) and aeration (1.5 vvm) as compared to optimum values. The results showed that the minimum level of air saturation (pO2) was adequate to maintain the bioconversion process.

摘要

在间歇式发酵罐中，使用嗜棒青霉和黑曲霉的混合培养物，研究了搅拌速率和通气速率对生活污水污泥微生物处理的影响。结果发现，废水污泥的液态生物转化（LSB）受搅拌和通气的影响很大。处理72小时后，在搅拌速度为150 - 200转/分钟、通气速率为0.5 vvm时，处理后污泥的污泥饼产量最高，有机物减少量最大。与最佳值相比，在较高搅拌速率（300转/分钟）和通气速率（1.5 vvm）下未观察到有效结果。结果表明，最低水平的空气饱和度（pO2）足以维持生物转化过程。