嗜热酶溶解法促进剩余污泥减量行为研究  

Study on Reduction Behavior of Excess Sludge with Solubilization by Thermophilic Enzyme

作　　者：赵维纳[1] 李小明[1] 杨麒[1] 曾光明[1] 张莹[1] 廖青[1] 王梓松[1] 

机构地区：[1]湖南大学环境科学与工程学院,湖南长沙410082

出　　处：《中国给水排水》2007年第23期29-33,共5页China Water & Wastewater

基　　金：教育部新世纪优秀人才支持计划项目(NCENT-0770);国家自然科学基金资助项目(50478054);国际科技合作重点项目(2004DFA06200);长沙市科技计划重点项目(K051132-72)

摘　　要：在剩余污泥中接种含混合嗜热菌的驯化种泥,通过批式运行,考察了不同温度下污泥中VSS、TSS、蛋白质等的溶解情况。结果表明,接种嗜热菌能促进悬浮固体的溶解,最适宜的处理温度为65℃,在该温度下处理120 h后,TSS和VSS的最大溶解率可分别达31.94%和48.04%,而未接种条件下的最大溶解率仅分别为19.69%和28.82%。微曝气条件下SCOD得到了累积,65℃处理72 h后SCOD出现最大值(4699 mg/L),有利于厌氧消化。此外,由于接种混合嗜热菌还促进了蛋白质的溶解,蛋白质和氨氮含量均是先上升后缓慢下降,说明蛋白质的溶解和氨氮浓度的变化均为动态平衡的结果。The domesticated seed sludge containing mixed thermophilic bacteria was inoculated in excess sludge. The solubilization of volatile suspended solids （VSS）, total suspended solids （TSS）, protein and so on in sludge under different temperatures was investigated through batch operation. The results show that the inoculated thermophilic bacteria can solubilize suspended solids. Under the optimal temperature of 65℃, the maximal solubilization rates of TSS and VSS are 31.94% and 48.04% after 120 h, while the maximal solubilization rates by noninoculated thermophilic bacteria are only 19.69% and 28.82%. Under the microaeration condition, the maximal soluble chemical oxygen demand （SCOD） of 4 699 mg/L occurs at temperature of 65℃ and after 72 h, benefiting the anaerobic digestion. The inoculated thermophilic bacteria can also solubilize protein, with rise and then fall of protein and ammonia nitrogen concentration, indicating the homeostasis of protein and ammonia nitrogen concentrations in the S-TE process.

关 键 词：嗜热酶溶解 嗜热菌 剩余污泥减量 污泥溶解 胞外酶 

分 类 号：X703[环境科学与工程—环境工程]