含镍钴废水处理工艺的选择

Selection of Treatment Process for Wastewater Containing Nickel and Cobalt

为了解决某公司原有废水处理站处理能力不足的问题,新建一个8000 m^3/d废水处理站,由碳酸镍上清液废水处理线和萃取皂化后液废水处理线组成,且两条废水处理线平行运行。新建废水处理系统采用的处理工艺为除油-絮凝反应-沉淀-过滤,重金属离子的去除采用加碱调节待处理废水p H值的同时,投加硫化钠、铁基活性捕集药剂形成絮凝物共沉的方式。经新建废水处理站处理后的废水中的Ni^2+、Co^2+、Cu^2+的浓度分别低于0.4 mg/L、0.8 mg/L、0.9 mg/L,悬浮物含量低于120 mg/L,达到了设计出水水质的要求。

In order to solve the problem of insufficient treatment capacity of original wastewater treatment station in a company,a new wastewater treatment station with 8000 m^3/d was built,which was composed of a wastewater treatment line of nickel carbonate supernatant and a wastewater treatment line of solution after extraction and saponification,and the two lines ran in parallel.The treatment process of oil removal-flocculation reaction-precipitation-filtration was used in the new system,and heavy metal ions were removed by the method of adding alkali to adjust the pH value of the wastewater to be treated and adding Na2S and iron-based active capturing agent to form flocculation co-precipitation.The concentrations of Ni^2+,CO^2+,Cu^2+ in the wastewater treated by the new wastewater treatment station were lower than 0.4 mg/L,0.8 mg/L and 0.9 mg/L respectively,and the concentration of suspended solids was lower than120 mg/L,which met the requirements of design effluent quality.