针对放电废水中的高有机物和氰化物,利用钙法除草酸根+ORZ除有机物+硫酸亚铁脱氰联用技术进行处理。在氯化钙质量浓度为30 g/L时结合ORZ处理技术,可将废水中COD降低至1 465 mg/L,COD去除率为98.42%;继续使用硫酸亚铁脱氰,在pH=1.9、反应时间为60 min、硫酸亚铁投加质量浓度为理论量的5倍时,可使出水总氰质量浓度<0.5 mg/L、COD<100 mg/L。

The battery discharge wastewater containing high concentrations of organic matters and cyanides is treated by a combining technology that uses calcium method to remove oxalates,ORZ to remove organic matters and ferrous sulfate to remove cyanides.COD content in wastewater can be dropped to 1,465 mg·L^-1,delivering a removal rate of 98.42% when the dosage of calcium chloride is 30 g·L^-1,and ORZ treatment technology is combined.Then the wastewater is continuously treated by ferrous sulfate to remove cyanides.Finally,the mass concentrations of total cyanides and COD in effluent can be less than 0.5 mg·L^-1 and 100 mg·L^-1,respectively when pH=1.9,the reaction time is 60 min,and the dosage of ferrous sulfate is 5 times the theoretical amount.

王启伟(1982-),男,硕士,工程师,研究方向为工业污水处理,qwwang@skkl.cn