DO对SBBR反应器污泥减量效能的影响  

Influence of DO on Sludge Reduction in SBBR

作　　者：窦艳艳[1] 周健[1] 韩懿[1] 覃光绪[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045

出　　处：《中国给水排水》2011年第21期15-18,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07315-005)

摘　　要：以SBBR反应器为研究对象,采用氧化还原电位微电极,考察液相DO浓度对生物膜微环境构成及其污泥减量效能的影响。研究表明,当控制平台期的DO分别为3、5和7 mg/L时,生物膜内ORP从外到内分别为(-16.68～-63.29)(、210.55～-51.37)和(216.03～75)mV,相应的污泥产率依次为0.1630、.078和0.099 kgMLSS/(kgCOD.d);当DO为5 mg/L时,系统污泥产率最小,其中生物膜内部缺氧和好氧层厚度分别为0.275 cm和0.225 cm,缺氧环境和好氧环境分别占55%和45%;DO对反应器除污效能的影响显著,当液相DO为5 mg/L时,出水COD、NH 4+-N、TN分别为37、3.02、17.61 mg/L。综合考虑污泥产率和除污效果,确定适宜的DO为5 mg/L。The influence of DO on composition of biofilm micro-environment and sludge reduction was investigated by redox potential （ORP） microelectrodes in SBBR. The result shows that when DO is 3 mg/L, 5 ms/L and 7 mg/L, the ORPs are - 16.68 to - 63.29 mV, 210. 55 to - 51.37 mV and 216.03 to 75 mV respectively from outside to inside in biofilm, and the average sludge yields are 0. 163 kgMLSS/（kgCOD · d）, 0.078 kgMLSS/（kgCOD · d） and 0.099 kgMLSS/（kgCOD - d） respectively. When DO is 5 mg/L, the sludge yield is the lowest, the thicknesses of anoxic layer and aerobic layer are 0.275 cm and 0.225 cm respectively, and the anoxic environment and aerobic environment are 55 % and 45% respectively. DO has a significant influence on pollutants removal. When DO is 5 mg/L, the effluent concentrations of COD, NH4＋ - N and TN are 37 mg/L, 3.02 mg/L and 17.61 mg/L respectively. Considering sludge production rate and pollutants removal effect, the appropriate DO is 5 mg/L.

关 键 词：DO浓度 SBBR 微环境 污泥减量 

分 类 号：X703[环境科学与工程—环境工程]