O/A两级生物砂滤工艺脱氮效果研究  

Study on denitrification performance of O/A two-stage biological sand filter

作　　者：赵靖[1] 唐锋兵[2] 王斌[3] 付民[3] 

机构地区：[1]中煤国际工程集团北京华宇工程有限公司,北京100120 [2]河北工程大学城市建设学院,河北邯郸056038 [3]邯郸市市政污水处理有限责任公司,河北邯郸056002

出　　处：《工业用水与废水》2011年第4期34-37,共4页Industrial Water & Wastewater

摘　　要：污水中的氮元素是可供藻类利用的营养元素之一,但其含量过高时将会引起水体富营养化。采用O/A两级生物砂滤工艺处理城市污水厂二级出水,考察了水温、水力负荷和碳氮质量比对生物砂滤脱氮效果的影响。试验结果表明,生物砂滤池的反硝化性能随水温增加而提高,随水力负荷增加而下降,TN的平均去除率随碳氮质量比的增加逐渐提高。当水温在20～26℃时,确定本试验的最优控制参数为:水力负荷为3 m3/(m2.h)、碳氮质量比为3.5∶1,此时TN的平均去除率可达到44%以上,出水TN质量浓度小于15 mg/L,O/A两级生物砂滤工艺可以取得较好的脱氮效果,是一种应用前景广阔的污水深度处理技术。As a nutrition element for algae′s growth,nitrogen can cause eutrophication when the concen-tration is too high.Using O/A two-stage biological sand filter to treat secondary effluent water from an urban sewage treatment plant,the influences of water temperature,hydraulic loading and mass ratio of carbon to nitrogen on the denitrification effect were investigated.The results of the test showed that,the denitrification performance of biological sand filter was improved with the increase of water temperature,and declined with the increase of hydraulic loading,the average removal rate of TN increased gradually with the increase of C/N mass ratio.When the water temperature was 20-26 ℃,the optimal control parameters of the test was determined as follows： the hydraulic loading was 3 m3/（m2·h）,the mass ratio of carbon to nitrogen was 3.5 ∶ 1.Under the above condition,the average removal rate of TN reached above 44%,the mass concentration of TN in the effluent water was lower than 15 mg/L.It could be seen that,O/A two-stage biological sand filtration process could get a good denitrification effect,which was a technology for wastewater advanced treatment with a broad application prospect.

关 键 词：生物砂滤 水温 水力负荷 碳氮比 脱氮 

分 类 号：X703.1[环境科学与工程—环境工程] X505