优化曝气方式对减缓SMBR一体式反应器中膜污染的影响  

ALLEVIATION OF MEMBRANE FOULING IN SUBMERGED MEMBRANE BIOREACTOR BY OPTIMIZED AERATION WAY

作　　者：王娜[1] 孙宝盛[1] 臧倩[1] 张海丰[1] 

机构地区：[1]天津大学环境科学与工程学院,天津300072

出　　处：《水处理技术》2007年第12期77-80,共4页Technology of Water Treatment

基　　金：天津市应用基础研究计划项目(07JCZDJC02100)

摘　　要：在相同运行条件下,研究了改进型曝气方式(膜出水时气水比为20:1,停止抽吸时气水比为40:1)和传统曝气方式(采用气水比40:1连续曝气)一体式膜生物反应器下SMBR的运行情况。试验结果表明:改进曝气方式的SMBR中胞外聚合物(EPS)和溶解性微生物产物(SMP)浓度以及料液粘度都低于传统的SMBR,减轻了膜污染,直观表现为具有较低的跨膜压力(TMP);两种曝气方式的膜阻力均以沉积层阻力为主,改进曝气方式的SMBR沉积层阻力所占比例高于传统的SMBR,后者膜孔吸附及堵塞阻力所占比例远高于前者,因此后者膜清洗费用高;此外改进型曝气方式由于其阶梯式曝气强度降低了能耗。A comparison between a improved aeration SMBR and a conventional aeration SMBR was carried out under similar operational conditions. The experimental results indicated that as the rtmtime lapsed ,the concentration of ESP and SMP in the improved aeration SMBR were lower than these in the conventional reactor. It can reduce the risk of membrane fouling. The improved reactor also had the lower viscosity and steady TMP. The reactors both took cake resistance as the main part of membrane resistance. The proportion of deposit resistance in the improved aeration SMBR was higher than the conventional aeration SMBR. And the latter＇s resistance against membrane pore adsorption and jam accounted for the ratio higher than the former, improving aeration mode and reducing the energy consumption in the experiment.

关 键 词：一体式膜生物反应器 胞外聚合物 溶解性微生物产物 跨膜压力 膜阻力 

分 类 号：TQ028.8[化学工程]