Abstract:

Secondary effluent of West Zone Wastewater Treatment Plant of Yanshan Petrochemical Co.has been treated with the biological aerated filter process.Its effects on NH_3－N removal of NH_3－N and COD concentration,COD/NH_3－N ratio and alkalinity of influent and the ratio of gas and water of the system are studied.The results showthat biological aerated filter could remove NH_3－N perfectly when NH_3－N concentration of influent is below 30mg/L.The average NH_3－N removal efficiency eaches 90.4%,and NH_3－N concentration of effluent is below 1mg/L.NH_3－N removal efficiency decreases with the increase of COD/NH_3－N ratio of influent and is higher when COD/NH_3－N ratio is below2.0.Higher NH_3－N removal efficiency has been got by using the process with alkalinity approximately being 290mg/L and the ratio of air and water being 3∶1.

Key words: biologicalaeratedfilter, secondaryeffluent, ammonia nitrogen

摘要：

采用曝气生物滤池工艺对燕化公司西区污水处理场的二级出水进行了处理，研究了进水NH₃-N浓度、COD浓度、m(COD)∶m(NH₃-N)、碱度及气水比对NH3-N去除效果的影响。试验结果表明，当进水NH₃-N质量浓度小于30mg/L时，曝气生物滤池对NH₃-N具有良好的去除作用，平均NH3-N去除率达到90.4%，出水NH3-N质量浓度可降至1mg/L以下。NH₃-N去除率随进水m(COD)∶m(NH₃-N)的增加而降低；当进水m(COD)∶m(NH₃-N)小于2.0时，NH3-N去除率达到90%以上。在进水碱度约为290mg/L和气水比为3∶1的工艺条件下运行，系统可获得较高的NH₃-N去除率。

关键词: 曝气生物滤池, 二级出水, 氨氮

CLC Number: 

• X703.1