摘要:
某硫化矿选厂有机废水中SS为180 mg/L、硫化物含量2.09 mg/L、COD为200 mg/L、pH为12.4,未达到国家排放标准,试验采用“酸碱中和—混凝沉淀—活性炭吸附—ClO2氧化—澄清—回用/排放”工艺对废水进行处理,结果表明:混凝沉淀完以后的处理水SS、硫化物可以达到外排标准;活性炭适宜用量为150 mg/L,最佳吸附时间为30 min;采用ClO2氧化剂可以降低废水中Fe2+、Mn2+含量,将黄药等残余有机物彻底氧化成CO2和H2 O。经过该工艺处理后废水CODcr去除率达到78.25%。
关键词:
-
硫化矿
/
-
有机废水
/
-
废水处理
/
-
混凝
/
-
吸附
/
-
氧化
Abstract:
The organic wastewater of a dressing plant contains SS 180 mg/L, sulfur 2.09 mg/L, COD 200 mg/L, and the pH is 12 .4 which did not reach the national discharge standard .So it was treated through the process of acid -base neutralization ,coagulating sedimentation ,activated carbon adsorption,ClO2 oxidation,clarification,and then reuse or discharge treatment .The sulfide and wa-ter SS reached the emission standard after coagulation and sedimentation processes .The dosage of activated carbon was 150 mg/L and the best adsorption time was 30 minutes.ClO2 oxidants can de-creased the Fe 2+and Mn2+contents at the same time .The residual organics like xanthate were com-pletely oxidized to CO 2 and H2 O by ClO2 oxidants.The CODcr removal rate by this method was 78 .25%.
下载: