碱性pH条件下增强剩余污泥厌氧产酸的研究  

Study on Enhanced Anaerobic Acidogenesis of Excess Sludge at Alkaline pH

作　　者：苑宏英[1] 员建[1] 徐娟[2] 池勇志[1] 赵连梅[1] 田素凤 

机构地区：[1]天津城市建设学院环境与市政工程系,天津300384 [2]化学工业出版社,北京100011

出　　处：《中国给水排水》2008年第9期26-29,共4页China Water & Wastewater

基　　金：国家高技术研究发展计划(863)项目(2004AA649330);天津市高等学校科技发展基金资助项目(20060521)

摘　　要：在污水处理厂内部,将污泥进行厌氧发酵来获取用于生物除磷所需的乙酸和其他挥发性脂肪酸等生物易降解基质是可行的,同时还实现了污泥的资源化利用。在污泥厌氧发酵的影响因素中,pH值是重要的参数之一。在温度为20～22℃的条件下,研究了剩余污泥在不同pH条件下(4.0～11.0)厌氧发酵产酸的情况。结果表明:pH值为8.0～11.0时所产生的挥发性脂肪酸(VFAs)总量多于pH值为4.0～7.0的,特别是在pH=10.0的条件下,第12天时的产酸量高达256.16mg/gVSS,是pH=7.0时的3.0倍左右。此外,还从SCOD溶出量、水解酶活性、甲烷产生量等方面探讨了碱性条件下剩余污泥产酸增多的机理。It is feasible to utilize the anaerobic fermentation of sludge to acquire acetate and other VFAs for enhanced biological phosphorus removal in wastewater treatment plants. At the same time, the reuse of sludge is realized. The pH is an important parameter to affect the anaerobic fermentation. The effect of pH ranging from 4.0 to 11：0 on the anaerobic acidogenesis of excess sludge at 20 to 22℃ was investigated. The results show that VFAs production at pH of 8.0 to 11.0 is higher than that at pH of 4.0 to 7.0. When the pH is controlled at 10.0, the maximal VFAs are achieved on the 12th day, which is almost 3 times of that at pH of 7. 0 （256.16 mg/gVSS versus 86.63 mg/gVSS）. Besides, further theory investigations were carried out on the high production at alkaline conditions, including the released soluble chemical oxygen demand （SCOD） , the enzyme activity and the methane production.

关 键 词：剩余污泥 厌氧产酸 挥发性脂肪酸 PH调节 碱性 

分 类 号：X703.1[环境科学与工程—环境工程]