臭氧-活性炭-反硝化生物滤池在污水再生回用中的应用

在酒仙桥污水处理厂建立200m3/d的示范工程进行高品质再生水的生产,在二级出水强化脱氮除磷的基础上,采用臭氧(O3)-活性炭(GAC)-反硝化生物滤池(DNBF)工艺进行试验研究。经过13个月的试验证明,该工艺由于O3在脱色除臭基础上,能够强化活性炭滤池的生物多样性及活性,从而使出水CODCr能够长期稳定在30mg/L以下,NH3-N小于1mg/L。在外加碳源CH3COONa条件下,系统经DNBF后出水TN小于2mg/L。同时试验发现,为了实现经济节能及良好的污水再生效果,DNBF和O3单元在流程中的位置设置非常关键,有别于污水二级处理工艺。

Pilot study on reclaimed wastewater treatment by O3-granular activated carbon-denitrification biofilter process

A 200 m3/d pilot-scale project has been established to produce reclaimed water in Jiu Xianqiao Wastewater Treatment Plant.A technique using ozone,granular activated carbon(GAC),and denitrification biofilter(DNBF)is added to treat the denitrogenated and dephosphorized wastewater.Data collected in a period of 13 months indicate that the process not only removes the color and odor in wastewater in ozone reaction tower,but also increases the biodiversity and activities of biomass in the GAC tank due to the ozonation treatment.The CODCr values of effluent maintain less than 30 mg/L,while NH3-N less than 1 mg/L stably.The TN values of the effluent are below 2 mg/L under the treatment of DNBF process.Meanwhile,it is found that the correct collocation of DNBF and ozone cells is significant,which is different from that of the secondary treatment process.