In view of the characteristics of tungsten smelting wastewater such as:high salinity,COD and ammonia nitrogen-containing,relatively complex quality,and so on,a combined process of pretreatment defluori-nation-electrochemical COD and ammonia nitrogen removal-nanocrystalline magnetic sedimentation,was adopted for its treatment.The operation results of the project showed that,the mass concentrations of COD,NH3-N,and fluoride decreased from 350-400,50-80 and 100-150 mg/L respectively to 20-50,below 5,5-8 mg/L respec-tively.The effluent water quality met the requirement of level B grade 1 in GB 18918-2002 Discharge standard of pollutants for municipal wastewater treatment plant,and can be discharged directly.
关键词
钨冶炼废水/高盐/除氟/电化学/纳米晶磁沉淀
Key words
tungsten smelting wastewater/high salinity/defluorination/electrochemistry/nanocrystalline magnetic sedimentation
维普
万方数据