高氮废水分段进水A/O工艺脱氮效果研究

Research on Multi-stage Anoxic/oxic Process Treating High-nitrogen Wastewater

为探讨分段进水A/O工艺在处理高氮废水时的脱氮效果,进行了小试试验研究,试验时采用自配的高氮废水作为进水原料,采用5段进水A/O工艺,分析了每段进、出水氨氮、硝氮和总氮的含量及去除率,在此基础上继而分析了该工艺脱氮的机理。结果表明:1)Ⅰ、Ⅱ工况下由于进水中有机物含量较高,该工况下反硝化反应不完全,造成出水中氨氮及硝氮含量较高,后续工况随着污水有机物含量的降低,出水中氨氮及硝氮去除效果愈加明显;2)该工艺中氨氮的去除主要是通过硝化细菌的硝化作用完成,且污泥有机负荷越小,氨氮去除效果越明显。研究结果可为国内外广泛推广生物脱氮除磷技术提供理论基础。

To explore nitrogen removal effect of wastewater when use multi-tage anoxic/oxic process, when experiment,use self-nitrogen waste water as raw material,this process was divided into five sec-tions,then analyzed the content and removal of ammonia,nitrate and total nitrogen when influent and effluent of each section,on this basis,The mechanism of biological nitrogen removal was analyzed,re-sult shows：1 ） due to the high organic content in water of sectionⅠand Ⅱ, denitrification reaction was incomplete,Resulting in a higher ammonia and nitrate in high content when effluent,As the or-ganic content in the sewage reduced,the effluent of ammonia and nitrate removal even more obvious in followed section;2 ） The removing of ammonia is mainly done through nitrification nitrobacteria in process,the smaller Sludge and organic load,the effect of ammonia removal is more obvious. The re-search results can provide theoretical basis for widely spread biological nitrogen and phosphorus re-moval technology at home and abroad.