pH、温度和癸酸对厌氧颗粒污泥产甲烷毒性关系的研究  

Effects of pH and temperature on inhibition of capric acid to anaerobic granular sludge

作　　者：周洪波[1] 陈坚[1] 周琪[2] 赵由才[2] 

机构地区：[1]无锡轻工大学生物工程学院环境生物技术研究室,江苏无锡214036 [2]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《生物技术》2001年第1期30-32,共3页Biotechnology

基　　金：同济大学污染控制与资源化研究国家重点实验室2000年开放课题基金资助项目

摘　　要：在间歇培养中研究了癸酸对 ＵＡＳＢ反应器厌氧颗粒污泥的产甲烷霉性，并考察了ｐＨ、温度和癸酸抑制的关系。结果表明，癸酸对厌氧颗粒污泥产甲烷活性有强烈的抑制，对厌氧颗粒污泥比产甲烷活性产生５０％抑制的浓度为１．９ｍｍｏｌ／Ｌ。ｐＨ影响癸酸在液相中的存在形式，ｐＨ越低．游离癸酸比例越大，对厌氧颗粒污泥的抑制越严重。高温条件下癸酸使厌氧颗粒污泥的结构变得松散，对厌氧颗粒污泥产甲烷毒性较中温和低温条件下严重。Batch tests were conducted to assess the toxicity of capric acid to methanogenic activity of anaerobic granular sludges from UASB, the effects of pH (5.5- 8.5) and temperature (15℃ ,35℃, 45℃) on inhibition of capric acid were investigated as well. The results showed that capric acid had strong inhibition on methanogenic activity of sludges. The value of fifty percent inhibition concentration( IC50) of capric acid was 1. 9mmol/L. The ratio of free LCFA to LCFA salt increased with the decrease of pH, which resulted in greater inhibition. The anaerobic granular sludge had loosely open structure under ther-mophilic condition and suffered much greater inhibition from capric acid than did sludge under mesophilic and psychrophilic conditions.

关 键 词：PH 温度 癸酸 厌氧颗粒污泥 产甲烷活性 毒性 污染 

分 类 号：X53[环境科学与工程—环境工程]