模拟给水管网中管壁生物膜生成特性

Characteristics of biofilms formation in simulate drinking water system.

使用2台不同设计参数的生物膜培养反应器（RAB）模拟不同管径的实际管网。研究了生物膜生成特性及规律．结果表明，2个反应器具有相似的生物膜生成特性．在反应器运行初期，挂片水平分区的4部分（M1、M2、M3、M4）生物量的平均值没有明显的差别。但运行4d后，挂片上部（M1、M2）和下部（M3、M4）生物量变化明显，下部较上部高出1-2个数量级；对挂片垂直分区的2个部分（X、Y）运行5d后，X区生物量是迎水区Y区的2-3倍．在相同的进水条件下，不同反应器生物膜达到最大生物量的时间基本一致，不同设计参数的RAB具有相似的模拟实际管网的性能．

Two rotating annular bioreactors （RAB） with different design parameters were used for simulating different pipe diameter and the biofilms development characteristies in drinking water distribution system. The reactors were similar in terms of biofilms development pattern and bacterial biomass. There was insignificant biomass difference in four parts（M1、M2、M3、M4） at the beginning period. Significant biomass differences were found in terms of M1、M2 and M3、M4 after four days operation, M3、M4 biomass was one to two orders of magnitude higher than M1、 M2. X biomass was two to thee times higher than Y after 5 days operation. Different design parameters RAB reached maximum biomass at the same time and water quality. The availability of different RAB had the same properties of simulating real distribution system .