污泥酸性发酵获取碳源的研究  

Gaining Carbon Source From the Sludge Acidogenic Fermentation Process

作　　者：宋秀兰[1] 刘涛[1] 李亚新[1] 

机构地区：[1]太原理工大学环境科学与工程学院,太原030024

出　　处：《北京工业大学学报》2012年第3期462-466,共5页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(50278060);山西省科技攻关项目(20100311125)

摘　　要：城市污水生物脱氮除磷过程中普遍存在碳源不足的问题,拟采用城市污水处理厂产生的污泥进行酸性发酵以开发碳源.试验考察了序批式反应器半连续运行时进料ρ(VS)、水力停留时间(HRT)、pH值和温度对污泥酸性发酵的影响.推荐污泥酸性发酵获取碳源的工艺条件:温度38℃、HRT为3 d、pH6.0、进料ρ(VS)20 g/L.在此工况下,挥发分为67.97%时,污泥产酸率为0.133～0.156 gVFA/(gVS.d),容积产酸速率为0.805～0.948 gVFA/(L.d),VS去除率为32.53%～45.60%;系统运行稳定,污泥的减量化效果好.Abstract： Carbon source insufficiency is a common problem in the biological nutriemt removal of municipal wastewater. In this paper, sludge from a municipal wastewater treatment plant is used forgaining carbon source through anaerobic acidogenic fermentation. Effects of feed VS concentration, hydraulic residence time （HRT） , pH, and temperature on the sludge acidogenic fermentation process areinvestigated in the sequencing batch reactor with a semi-continuous operation mode. Recommendation conditions of sludge acidogenic fermentation to gain carbon source are the temperature of 38℃ , HRT of 3d, pH6.0, and feed p（VS） of 20 g/L. When the volatile solid content is 67.97% , the acid yield rate of sludge is 0. 133 -0. 156 gVFA/（gVS＇d）, total acid productivity is 0. 805 - 0. 948 gVFA/（ L· d）, andthe removal ratio of VS is 32.53% -45.60%. The stable acidogenic fermentation process can be kept in this condition, and the effect of sludge reduction is significant.

关 键 词：污泥 酸性发酵 碳源 产酸率 

分 类 号：X703.1[环境科学与工程—环境工程]