自养脱氮滤池在工业园区污水处理厂的工程应用

作者:蒋富海
单位:中持水务股份有限公司
摘要:自养脱氮滤池作为污水处理厂二级生化后的深度脱氮技术,选用2~3mm粒径的自养活性滤料,稳定实现出水TN≤10mg/L,且零(或低)碳源添加,助力降碳排量。下向流的自养脱氮滤池,HRT约20min,进水DO高于4mg/L时,平均脱氮浓度仍达8.50mg/L,脱氮率67%,脱氮负荷0.64kg/(m3·d),其药耗较异养脱氮时可降耗30%~50%,宜控制脱氮滤池的进水DO≤2mg/L。自养脱氮滤池需长期关注NO2-N、S2-、SO42-等副产物累积的不利影响。
关键词:工业园区污水处理厂高排放标准自养脱氮滤池自氧缓释活性滤料工程化应用
作者简介:*蒋富海,男,1983年出生,安徽怀宁人,硕士研究生,高级工程师。主要研究方向为污废水运营技术与管理工作。E-mail:jafehy@163.com;
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Application of autotrophic denitrification filter in one industrial park's wastewater treatment plant
JIANG Fuhai
(CSD Water Service Co.,Ltd.)
Abstract: Autotrophic denitrification filter would be a deep-enhanced denitrification technology joined after the secondary biochemical treatment unit,in which filter-media was used with two to three particle size,as well as special autotrophic slowly-released &active characteristics,effluent total nitrogen index could be stably below 10 mg/L,as well as reduction of carbon emission with zero(or low)carbon source.As for the autotrophic denitrification filter of down-flow,In condition of HRT is about 20 min,influent DO level of no less than 4 mg/L,average nitrate nitrogen removal concentration could still be 8.50 mg/L,nitrate nitrogen removing efficiency of 67%,nitrate nitrogen volumetric loading of 0.64 kg/(m3·d),and 30% to 50% ratio saving compared with what in the heterotrophic denitrification filter.Influent DO level of denitrification filter should be less than 2 mg/L.Long term attention should be paid to the accumulation and side effects of nitrite nitrogen,sulfide or sulfate.
Keywords: Industrial park's wastewater treatment plant; High emission standards; Autotrophic denitrification filter; Activated autotrophic filter-media; Volumetric loading of nitrate nitrogen; Engineering application;
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