The Treatment Of Coking Wastewater With The Units Of ASBR+SBR+SBR+BAF

The treatment of coking wastewater with the united ASBR+SBR +BAF was studied in this paper.The paper studied the toxicant effect on the nitrobacteria in the united treatment of C-oxidation and nitration using the single aerobic reactor after anaerobic pretreatment of the coking wastewater. The results indicate that excellent nitration of NH,-N need the sufficient removal of COD to prevent the restrain of toxicant on the nitrobacteria.In the technology of united ASBR+SBR+SBR+BAF, the effect on the treatment of various gas/water ratios when the HRT in the BAF was 24h was studied and the gas/water ratios were optimized. The results showed that when the gas/water ratio was 70:1 in the reactor BAF, the ASBR+SBR+SBR+ BAF can effectively treat the coking wastewater and the effluent can meet the station wastewater emission standard.