某电镀园区络合态锌镍废水处理工艺改造
Modification of treatment process for the complexed zinc-and nickel-containing wastewater in an electroplating park
毋浪鹏 1郑元武 1许海亮 1钟晓丽 1陈伟龙 1刘可1
作者信息
- 1. 浙江海拓环境技术有限公司,浙江 杭州 310052
- 折叠
摘要
[目的]电镀废水中的锌离子和镍离子一般以稳定的络合态形式存在,处理难度大.某电镀园区络合态废水的原处理工艺为一级氧化破络沉淀+二级螯合沉淀,处理后出水的镍、锌不能稳定达标.[方法]将该园区的废水处理工艺改为一级脱氮破络沉淀+二级螯合沉淀.[结果]改造后,出水的总镍和总锌均能稳定满足GB 21900-2008标准中"表3"的要求,同时吨水运行成本相比于改造前降低了约 30 元,一年可为园区节约 72 万元,实现了降本增效的目的.[结论]改造工艺运行稳定,处理效果佳,具有良好的环境效益和经济效益.
Abstract
[Introduction]The electroplating wastewater is difficult to treat because the metal ions in it are usually in form of stable complexes.The original process for treatment of complex wastewater in an electroplating park was precipitation by oxidation decomplexation at first stage and chelation at second stage.The concentrations of total nickel and total zinc in effluent couldn't stably meet the discharge standard.[Method]The first-stage wastewater treatment process was transformed into precipitation by denitrification decomplexation,while the second-stage chelation precipitation process remained the same.[Result]The concentrations of total nickel and total zinc in the effluent of the modified treatment process met the requirements of Table 3 in the Emission Standard of Pollutants for Electroplating(GB 21900-2008).The operation cost per ton of wastewater was reduced by about 30 RMB as compared with that of the original treatment process,saving 720000 RMB for the enterprise a year.[Conclusion]The modified process has good operation stability and high treatment efficiency,and good environmental and economic benefits.
关键词
电镀废水/锌/镍/破络/螯合沉淀/降本增效Key words
electroplating wastewater/zinc/nickel/decomplexation/chelation precipitation/cost reduction and efficiency increase引用本文复制引用
基金项目
污废水减污降碳协同处理及再生利用关键技术、装备研发及示范(2023C03147)
出版年
2024
NETL
NSTL
万方数据