SBBR中生物膜特征及污泥减量

Biofilm Characteristics and Sludge Minimization in a Sequencing Biofilm Batch Reactor

摘要: 采用以陶粒为填料的SBBR，处理实际生活污水。COD、-N、TN及浊度的平均去除率分别达到92%、95%、80%和97%。反应器正常运行近两年，未进行主动排泥、反冲洗，没有出现堵塞现象，表现出良好的污泥减量效果。通过光学显微镜和扫描电镜(SEM)观察，采用X射线荧光光谱(XRF)对生物膜的无机成分进行分析。发现生物膜结构致密，生物种群较为丰富，微生物的内源呼吸、同步硝化反硝化、生物膜的部分矿化和微型生物的摄食作用是实现污泥减量的主要原因。反应器中发挥主要摄食作用的微型生物包括钟虫、线虫、红斑顠体虫等。

Abstract: A sequencing batch biofilm reactor (SBBR) packed with ceramsite treated domestic wastewater had operated about two years. The mean removal efficiencies of COD, -N, TN and turbidity were 92%, 95%, 80% and 97%, respectively. This system had never residual sludge discharged and clogged. It performed outstanding effect of sludge minimization. Microscopy, scanning electron microscopy (SEM) and the X-Ray Fluorescence (XRF) used to analyze the characteristics and inorganic component of biofilm. The stable structure of biofilm and rich species of microfauna were found. The endogenous respiration of microbial, microfauna feeding bacteria and partially mineralization of biofilm achieved the main cause of sludge minimization. Vorticella, worm and aeolosoma hemprichi in this SBBR played very important role in reducing production of residual sludge.