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《Environmental Science & Technology》 2009-02
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Effect of Hydraulic Retention Time on Treatment Efficiency of Porcelain Particles Biological Aerated Filter for Domestic Wastewater

LIU Can-can1,2, JIN Wu-yun1,2, SHEN Yao-liang1,2, YUAN Yu1,2 (1.Jiangsu Provincial Key Laboratory of Environmental Science and Engineering; 2.School of Environment Science and Engineering,Suzhou University of Science and Technology,Suzhou 215011,China)  
A bench scale study was done to evaluate the effect of hydraulic retention time (HRT) on the efficiency of porcelain particles biological aerated filter(BAF)by using domestic wastewater as feed water. Variations of operation pattern and treatment efficiency of bioreactor resulted from the change of HRT were analyzed with stable gas to liquid ratio. The concentration changes of COD,NH4+-N,NO2--N,NO3--N,TN and SS in different HRT were investigated. Experimental results showed that when COD concentration in influent was between 280~320 mg/L,gas to liquid ratio was 3:1 and HRT was 10h,the removal efficiency was the best,with average removal efficiency of COD,NH4+-N,TN and SS as 92.6%, 97.8%,34.7% and 84.2% respectively. When HRT was decreased gradually,removal efficiency of COD,NH4+-N,TN and SS decreased,and there was no linear relationship between HRT and removal efficiency. When HRT was decreased to 3h, removal efficiency of COD,NH4+-N,TN and SS increased to a certain extent.
【Fund】: 江苏省“333工程”学术带头人资助课题
【CateGory Index】: X703
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