生活污泥在生物干化过程中的降解效果研究  

Degradation of Sewage Sludge during the Process of Bio-drying

作　　者：邹惠芬[1] 余敏[1] 冯国会[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《环境科学与技术》2013年第10期142-145,共4页Environmental Science & Technology

基　　金：国家自然科学基金研究项目:剩余污泥生物干化过程的机理研究(51208313)

摘　　要：文章建立了污泥生物干化装置,对来自北方污水处理厂的污泥进行生物干化的研究。以接种嗜热菌和控制通风策略为手段,以干化前后污泥中溶解性化学需氧量(SCOD)和挥发性脂肪酸(VFA)的含量变化为依据,研究了北方生活污泥的生物干化工艺。试验结果显示,接种嗜热菌或间歇通风能够促进污泥中SCOD和VFA的积累,加快有机物的降解,并且对污泥中质量的传递起到显著的作用。另外,SCOD的累积量,也就是污泥中小分子含量的增量,说明了嗜热菌在生物干化过程中分泌的物质能将一些不溶性或者难降解的大分子有机物分解为可溶性物质。文章得出了嗜热菌对生活污泥降解具有很大的潜力,以及间歇通风方式较之连续通风方式更能提高污泥生物干化效率的结论。A device was designed for the study of bio-drying of sewage from Northern Sewage Treatment Plant. Bio-drying process of the sewage sludge based on method of inoculating thermophilic bacteria and controlling the condition of ventilation was investigated, and the changed content of soluble chemical oxygen demand （SCOD） and volatile fatty acids （VFA） was analyzed. Experimental results showed that vaccinating thermophilic bacteria or intermittent ventilation can promote the accu- mulation of SCOD and VFA in the sludge, and accelerate the degradation of organic matter as well. They played a significant role in substance transferring. In addition, the cumulative amount of SCOD which is the incremental content of small molecules in the sludge, indicated the secretion of thermophilic bacterial can decompose the material which is insoluble or dif- ficult to be degraded into soluble substance. Thermophilic bacteria have great potential on sludge degradation, and intermittent ventilation can enhance sludge bio-drying efficiency compared with continuous ventilation.

关 键 词：嗜热菌 生物干化 降解 通风策略 

分 类 号：X705[环境科学与工程—环境工程]