摘要
研究了DO对膜生物反应器(MBR)中污泥特性的影响。实验结果表明:随DO的增加COD去除率和TN去除率降低,在平均进水COD为848 mg/L的条件下,DO分别为2,4,6 mg/L的MBR的COD去除率为99.12%,97.83%,97.81%;DO增加导致微生物分泌出更多的溶解性微生物产物,污泥比耗氧速率降低;DO越高,相应气水比越大,导致污泥粒径变小,污泥比阻增加。
The effects of DO on the sludge characteristics in membrane bioreactor were studied. The experimental results show that： The removal rates of COD and TN are reduced with the increasing of DO, when the average influent COD is 848 mg/L, the DO are 2, 4 and 6 mg/L, the COD removal rates are 99.12%, 97.83% and 97.81% respectively; With the increasing of DO, microorganisms secrete more soluble microbial products and the specific oxygen uptake rate （SOUR） is decreased; The higher the DO is, the greater the gas- water ratio is, it results in the shortening of sludge particle size and the increasing of sludge specific resistance.
出处
《化工环保》
CAS
CSCD
北大核心
2013年第5期394-397,共4页
Environmental Protection of Chemical Industry
基金
国家水体污染控制与治理科技重大专项基金资助项目(2012ZX07101-003)
江苏省环保科研课题(201105)
江苏省太湖治理科研课题(TH2012204)
关键词
膜生物反应器
溶解氧
污泥特性
废水处理
membranebioreactor
dissolved oxygen
sludge characteristics
wastewatertreatment
