黏土载体和沉淀时间对高进水COD废水培养好氧颗粒污泥的影响  

Effects of clay carrier and precipitation time on the cultivation of aerobic granular sludge with high influent COD wastewater

作　　者：肖飞 王世民 赵峰德 XIAO Fei;WANG Shimin;ZHAO Fengde(College of Water Conservancy and Architectural Engineering,Tarim University,Alar 843300,China)

机构地区：[1]塔里木大学水利与建筑工程学院,阿拉尔843300

出　　处：《干旱区资源与环境》2024年第4期121-128,共8页Journal of Arid Land Resources and Environment

基　　金：塔里木大学校长基金(TDZKSS202329,TDZKSS202148)资助。

摘　　要：南疆地区农业灌溉发达,浇施的养殖废水中含有较高浓度COD,易污染地表水,研究可降解高COD浓度的污水处理技术显得尤为重要。在高径比(R_(H/D))为3.125的序批式反应器(SBR)内接种活性污泥,以人工配制的高浓度COD为进水,分析污泥颗粒化过程中污泥形态、污染物去除性能及不同阶段微生物菌群的变化规律。结果表明:施加黏土载体后,待好氧颗粒污泥稳定时MLSS为2700mg/L,SVI_(5)、SVI_(30)均在40.12mL/g以下,颗粒呈橙黄褐色的稻壳状,平均粒径为414μm,内部结构为丝状菌骨架;对废水中COD、TP、NH_(4)^(+)-N平均去除率分别为91.12%、90.77%和81.20%;具有脱氮除磷能力的菌属有动胶菌属(Zoogloea)、黄杆菌属(Flavobacterium)、梭菌属(Fusibacter)和陶厄氏菌属(Thauera),相对丰度分别为49.95%、11.52%、2.25%和2.67%。采用以黏土为载体的方式,既解决了直接在高进水COD浓度下启动颗粒污泥的难题,又能富集不同类型的微生物菌群进行脱氮除磷,对养殖废水的处理具有借鉴意义。Agricultural irrigation is developed in southern Xinjiang,and the aquaculture wastewater containing high COD concentration is easy to pollute the surface water,so it is particularly important to study the wastewater treatment technology that can reduce high COD concentration.The activated sludge was inoculated in a sequence batch reactor(SBR)with a height to diameter ratio(RH/D)of 3.125,and the high concentration COD was artificially prepared as influent.The changes of sludge morphology,pollutant removal performance and microbial flora at different stages during sludge granulation were analyzed.The results showed that MLSS was 2700 mg/L,SVI5 and SVI30 were both less than 40.12mL/g when the aerobic granular sludge was stabilized after the application of clay carrier.The particles were orange-yellow and brown rice hulls with an average particle size of 414 um,and the internal structure was filamentous bacterial skeleton.The average removal rates of COD,TP and NH_(4)^(+)-N in wastewater were 91.12%,90.77%and 81.20%,respectively.The relative abundances of Zoogloea,Flavobacterium,Fusibacter and Thauera were 49.95%,11.52%,2.25%and 2.67%,respectively.Using clay as carrier not only solves the problem of starting granular sludge directly under the influent with high concentration of COD,but also can enrich different types of microbial flora for removal of nitrogen and phosphorus,which has reference significance for the treatment of aquaculture wastewater.

关 键 词：好氧颗粒污泥 SBR 黏土载体 除污性能 养殖废水 

分 类 号：X71[环境科学与工程—环境工程]