反硝化生物滤池用于白酒废水深度脱氮处理研究

Denitrifying Biofilter for Advanced Nitrogen Removal Treatment of Liquor Wastewater

采用反硝化生物滤池处理某白酒废水处理厂二沉池出水，研究了以连续进水培养方式进行挂膜和启动的过程，以及碳源投加量对脱氮效果的影响。结果表明：采用原水即白酒废水作为碳源，在停留时间为2h、水力负荷为6m^3／（m^2·d）、进水温度为30～35℃的条件下，针对白酒废水深度脱氮处理的合适COD／TN值为3．5，此时对TN的去除率可以达到85％以上。升流式反硝化生物滤池对污染物的降解主要发生在底部填料层，在填料层60cm处，对TN和NO3--N的去除率分别可达到77％和88％。

Denitrifying biofilter was used to treat the effluent of the secondary sedimentation tank of a liquor wastewater treatment plant. The formation and start-up of biofilm with continuous inffluent as well as the effect of carbon source dosage on the nitrogen removal were investigated. The results showed that under the conditions of using raw water as carbon source, HRT of 2 h, hydraulic loading of 6 m3/ （ m2 · d） and influent temperature of 30 to 35 ℃, the removal rate of TN was more than 85% at the opti- mal COD/TN ratio of 3.5. Contaminant degradation occurred mainly at the bottom of the upward flow de- nitrifying biofilter, and the removal rates of TN and NO3-- N were 77% and 88% respectively at the 60 cm of the filler.