浸没式膜-生物反应器中曝气系统的优化设计  

Optimal Design of Aeration System in Submerged Membrane Bioreactor

作　　者：贾辉[1] 王捷[1] 张宏伟[1] 

机构地区：[1]天津大学环境科学与工程学院

出　　处：《天津大学学报》2007年第8期931-935,共5页Journal of Tianjin University(Science and Technology)

基　　金：天津市科委科技攻关计划重大资助项目(05YFGDGX10000)

摘　　要：试验考察了浸没式膜-生物反应器不同工况下的膜污染速率,确定在污泥浓度为6000~8000 mg/L时,最佳的膜面吹扫气水比为15∶1.在试验基础上对不同水质条件下溶解氧气量和膜面吹扫气量的关系进行了计算模拟.模拟结果表明,当所需的膜面吹扫气量大于供溶氧气量时,采用穿孔管的单路曝气较优,曝气量按照膜面吹扫气水比设计;当供溶解氧气量大于吹扫气量时,采用穿孔管和微孔曝气结合的方式效能更高,曝气量应按照溶解氧气水比设计.在曝气量的设计中,引入“负荷分配”的思想可有效降低运行能耗.A submerged membrane bioreactor （SMBR） experiment was designed to compare fouling rate in different stages, the results indicate that in the case of mix liquid suspended solid concentration 6 000-8 000 mg/ L, the optimal scouring membrane air-to-water ratio is 15： 1. Based on the experiment results, the relationship between scouting membrane surface rate and oxygen supply rate was simulated in different influent qualities. The simulation results show that if the gas used in scouring membrane is more than oxygen supply, one-system aeration unit with perforate tube is recommended, and the total aeration rate is designed according to air-to-water ratio of sweep membrane surface; when the gas used in scouring membrane is less than oxygen supply, twosystem aeration unit with combined perforate tube and micropore aeration is more efficient. Total aeration rate should be designed according to air-to-water ratio of oxygen supply. Applying the idea of loading distribution to the design of SMBR aeration system can significantly reduce total energy consumption.

关 键 词：膜-生物反应器 曝气系统 气水比 穿孔曝气 微孔曝气 优化设计 

分 类 号：TL25[核科学技术—核燃料循环与材料]