摘要
采用O/A两级生物砂滤工艺处理城市污水厂二级出水,研究了气水比对生物砂滤工艺碳化、硝化、反硝化和除浊性能的影响。结果表明:在气水比从1∶1增大到3∶1的过程中,系统对COD和NH+4-N的平均去除率都逐渐增大,对TN的去除率则呈先增大后下降的趋势,气水比对出水浊度的影响较小;在最佳气水比(2∶1)下,系统对COD、NH4+-N、TN和浊度的平均去除率分别为31.9%、60.3%、37.3%和78.63%。气水比是影响生物砂滤工艺碳化、硝化和反硝化性能的重要因素。
The O/A biological sand filter was used to treat the secondary effluent of WWTP, and the influence of different air-water ratios on the carbonization, nitrifieation, denitrifieation and turbidity removal of O/A biological sand filter were studied. The results indicate that the average removal rates of COD and NH4^＋ - N are gradually increased, and the average removal rate of TN is first increased and then deereased with the air-water ratio ranging from 1 ： 1 to 3 ： 1. The change of the air-water ratio has less influence on effluent turbidity. Under the optimal air-water ratio of 2 ： 1, the average removal rates of COD, NH4^＋ - N, TN and turbidity are 31.9% , 60.3% , 37.3% and 78.63% respectively. The airwater ratio is an important faetor which can affeet the carbonization, nitrification and denitrifieation of the biological sand filter.
出处
《中国给水排水》
CAS
CSCD
北大核心
2010年第11期100-103,共4页
China Water & Wastewater
基金
中韩国际合作项目
河北省科技支撑项目(07276713D)
关键词
O/A生物砂滤工艺
气水比
硝化
反硝化
碳化
O/A biological sand filter
air-water ratio
nitrification
denitrifieation
carbonization
