长链脂肪酸对厌氧颗粒污泥产甲烷活性的影响及其相互作用研究  

Effects of Long-china Fatty Acids on Methanogenic Activity of Granular Sludge and the Interactions

作　　者：周洪波[1] 陈坚[1] 任洪强[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：《中国沼气》2001年第1期3-5,36,共4页China Biogas

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

摘　　要：采用间歇培养实验研究了辛酸、癸酸和月桂酸等三种长链脂肪酸对ＵＡＳＢ反应器厌氧颗粒污泥产甲烷活性的毒性，以及癸酸对辛酸和月桂酸抑制作用的影响。结果表明，辛酸、癸酸和月桂酸对ＵＡＳＢ反应器厌氧颗粒污泥的产甲烷活性有严重抑制，对厌氧颗粒污泥最大比产甲烷活性产生５０％抑制的浓度（ＩＣ５０）分别是５．６，１．９，４．６ ｍｍｏｌ·Ｌ－１，其中癸酸的毒性最大。癸酸的存在能够增强辛酸和月桂酸对厌氧颗粒污泥产甲烷活性的抑制。癸酸和辛酸，癸酸和月桂酸之间表现出协同作用。辛酸和月桂酸ＩＣ５０值因为癸酸的存在而明显降低。The toxicity of caprylic acid, capric acid and lauric acid to anaerobic granular sludge as well as the influence of capric acid on toxicity of caprylic acid and lauric acid were studied in batch assays. The results showed that caprylic acid, capric acid and lauric acid had strong inhibition on methanogenic activity of anaerobic granular sludge. The concentrations of three long -chain fatty acids(LCFA)which inhibited 50 % of maximum specific methanogenic activity(IC50 )of anaerobic granular sludge were 5 .6, 1 .9, 4. 6 mmol·L- 1 respectively, among which carpic acid was the most toxic. The presence of capric acid enhanced the inhibitory effects of caprylic acid the lauric acid. The synergistic action of capric acid was found when combined with caprylic acid and lauric acid. With the presence of capric acid, the IC50 values of caprylic and lauric acid deceased obviously.

关 键 词：毒性 长链脂肪酸 厌氧颗粒污泥 产甲烷活性 协同作用 油脂废水 

分 类 号：X785.031[环境科学与工程—环境工程]