长链脂肪酸对厌氧颗粒污泥产甲烷毒性研究  

METHANOGENIC ACTIVITY OF ANAEROBIC GRANULAR SLUDGE BY LONG-CHAIN FATTY ACIDS

作　　者：周洪波[1] 陈坚[1] 赵由才[2] 周琪[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：《水处理技术》2002年第2期93-97,共5页Technology of Water Treatment

基　　金：同济大学污染控制与资源化研究国家重点实验室 2 0 0 0年开放课题基金资助项目

摘　　要：在间歇培养中研究了不同长链脂肪酸 ( LCFA)对 UASB和 EGSB两种反应器厌氧颗粒污泥的产甲烷毒性。结果表明 ,庚酸、癸酸和油酸对厌氧颗粒污泥产甲烷活性有较强的抑制 ,EGSB反应器厌氧颗粒污泥对 LCFA的抑制表现出比 UASB反应器厌氧颗粒污泥更大的耐受能力。LCFA主要通过在颗粒污泥厌氧微生物的吸附而破坏菌体细胞膜的结构 ,直接杀死厌氧微生物。厌氧颗粒污泥中 ,利用乙酸的甲烷菌和产氢产乙酸菌受到 LCFA的抑制较严重 。A series of assays were conducted to assess the toxicity of long-chain fatty acids(LCFA) to methanogenic activity of anaerobic granular sludges from UASS and EGSB reactors. The results showed that n-Heptanoic acid, capric acid and oleic acid had strong inhibition on methanogenic activity of sludges. Sludge from EGSB reactor could bear much higher concentration of LCFA than sluge from UASB reactor. The adsorption of LCFA to cell membrane led to the cell lysis of anaerobes. Among anaerobes, acetate-utilizing methanogens and hydrogen-producing acetogenic bacteria suffered much higher inhibition from LCFA than formate-utilizing methanogens and hydrogen-utilizing methanogens.

关 键 词：毒性研究 毒性 长链脂肪酸 厌氧颗粒污泥 甲烷活性 废水处理 

分 类 号：X703[环境科学与工程—环境工程]