某污水处理厂有机物去除与脱氮性能分析

Analysis of Organic Matter Removal and Nitrogen Removal Performance of a WWTP

文章研究了某工业污水处理厂AAO生物反应池-二沉池-终沉池-一级活性焦吸附池-二级活性焦吸附池工艺运行过程中有机物去除与脱氮性能,并采用三维荧光光谱技术、紫外-可见光谱技术对溶解性有机物变化和去除规律进行了分析。结果表明:进水中颗粒/胶体态COD_(Cr)和溶解性COD_(Cr)分别占总COD_(Cr)的25.6%和74.4%,易生物降解有机物和惰性有机物分别占总COD_(Cr)的39.6%和60.4%,生物池对难降解有机物的去除作用有限,难降解有机物的去除主要依靠两级活性焦的吸附作用,出水溶解性COD_(Cr)质量浓度降至35.2 mg/L;生物池活性污泥的硝化能力和反硝化能力较差,硝化速率和反硝化速率分别为0.34mg N/(g SS·h)和0.77 mg N/(g SS·h)。

The organic matter removal and denitrification performance of AAO bioreactor-secondary sedimentation tank-terminal sedimentation tank-first-stage activated coke adsorption tank-second-stage activated coke adsorption tank process in anindustrial wastewater treatment plant(WWTP)was investigated,and the variations and removal of dissolved organic matter were analyzed by three-dimensional fluorescence spectroscopy and ultraviolet-visible spectroscopy techniques.The results showed that the particulate,colloidal and soluble COD_(Cr) in the influent account for 25.6%and 74.4%of the total COD_(Cr),respectively,the biodegradable and inert organics accounted for 39.6%and 60.4%of the total CODc,in the inlet,respectively,and that the biological tank had limited effect on the removal of refractory organics,which mainly depended on the adsorption of two-stage activated coke,the dissolved COD_(Cr) concentration in the effluent drops to 35.2 mg/L.The nitrification and denitrification capacities of activated sludge were low,with nitrification and denitrification rates of 0.34 mg N/(g SSh)and 0.77 mg N/(g SS·h),respectively.