反硝化滤池在处理含硝态氮树脂脱附液中的研究

Research on denitrification biological filter in the treatment of the desorbed wastewater with nitrate from resin

脱附液的处理处置问题是限制离子交换树脂在水处理中应用的重要因素,针对含硝态氮的树脂脱附液,以乙醇为碳源,结合反硝化滤池对含硝态氮的树脂脱附液进行处理,探究了不同盐浓度和不同碳氮比对系统出水COD和TN浓度的影响.结果表明,当盐浓度为15000 mg/L、碳氮比为3时,对COD和TN的去除率分别为97.91%和97.80%,出水情况远低于《城镇污水处理厂污染物排放标准》(GB18918-2002)的一级A标准.

The application of ion exchange resin in wastewater was limited by the disposition problem of resin regeneration effluent.This article mainly aimed at the desorbed wastewater with nitrate from resincombine with denitrification biological filter.Ethyl alcohol was added as a carbon(C)source.The effluent concentrations of COD and TN in case of different concentration of NaCl and C/N ratio were investigated.The study showed that the removal rate of COD and TN was97.91%and 97.80%respectively,when the concentration of NaCl was 15000 mg/L and C/N ratio was 3.The TN and COD concentrations were far lower than the first grade discharge standard of pollutants for municipal wastewater treatment plant(GB 18918-2002).