给水管网管壁生物膜生长特性研究

Biofilm Growth Characteristics in the Internal Surface of Water Supply Pipelines

以模拟输水管道生物膜反应器(SIBR)模拟实际给水管网,研究了不同温度、流速、材质的细菌生长规律。结果表明,管道水力剪切力小于0.60 N/m^2(0.6 m/s)时,随着流速的增大,细菌量越大;27℃和21℃宜于细菌生长,13℃不宜于细菌生长,随着温度的降低,细菌量会降低,细菌生长的最大值出现的时间延迟;不锈钢片的细菌量明显小于PVC片,不锈钢管材是较为理想的管材。

The growth of the bacteria on the different temperature, velocity of flow and material were studied using SIBR stimulant real pipeline. The faster water speed flow, the larger bacterial number will be, when shear stress is smaller than 0.60 N/m^2 （0.6m/s）. 27 ℃ to 21 ℃ are suitable temperature range for bacteria growing, but 13 ℃ is not. With the temperature lowering, the number of bacteria is becoming smaller, and the time of the curve peak appearing is delaying. According to the number of bacterial in different pieces, the material of steel is better than PVC, so the pipe of steel is better.