摘要
通过浸没式膜-生物反应器小试试验,分析了不同工况下膜污染的发展特点,并据此对不同清洗药剂的清洗效果,及化学药剂的引入对微生物活性的影响进行了考察。通过多阶段试验发现,膜污染总体上呈现"2阶段"趋势,而在线反洗可有效延缓膜污染进入第二阶段,降低由于膜污染带来的能耗损失。通过各阶段膜污染趋势曲线的拟合,确定了最佳的在线清洗周期。活性污泥氧消耗速率的变化可作为微生物耐受化学药剂程度的指标之一,试验发现,当在线加入ω(NaClO)为250×10-6时,微生物活性虽略有变化,但不影响系统的正常运行。
Growing trait of membrane fouling under different conditions was analyzed in immersed membrane bioreactor, based on which, the cleaning effects of various chemical medicine and influence of their introduction to activity of microbe were investigated. According to the experiment of different stages, it was found that membrane fouling showed a two- stage trend, But anti-cleaning online could slow down effectively membrane fouling＇s entrance into the second stage and reduce the energy loss. Through the curve fitting of membrane fouling in various stages, the optimal cleaning period online was obtained. The oxygen uptake rate （OUR） of active sludge can be seen as one of the indexes used to indicate enduring degree of microbe under the effect of chemical medicine. In the experiment, it was found that when NaClO was added, with conoentration of 250 × 10^-6, into the bioreaetor, the activity of microbe had a little change without effeeting normal running of the system.
基金
天津市科技发展计划基金(033113811)
天津工业大学教育部重点实验室开放基金(060521)
关键词
膜-生物反应器
膜污染
膜清洗
微生物活性
氧消耗速率
Bioreaetor
Membrane fouling
Membrane cleaning
Activity of microbe
Oxygen uptake rate（OUR）
