摘要
为了实现H酸废水的资源化利用,采用萃取剂在间歇罐式萃取反应器中对高浓度H酸废水进行萃取预处理研究。通过实验确定了最优工艺条件为：进水COD质量浓度为40 000~45 000 mg/L,p H值为1,温度40℃,萃取剂与废水体积比1︰1,负载萃取剂与再生剂体积比50︰1,搅拌时间5 min,再生剂质量分数30%,在最佳条件下进行实验,COD去除率大于98%。经萃取工艺处理后,萃余液COD质量浓度在500 mg/L左右,萃取剂可以再生回用。
In order to realize the recycle of H acid wastewater, the H acid wastewater was pretreated by extraction in the intermittent tank extractor with extraction solvent. The optimum process conditions determined by the tests are as follows：influent COD 40 000 ~ 45 000 mg/L,p H 1, temperature 40 ℃, the volume ratio of extraction agent and wastewater 1 ︰1, the volume ratio of loading extraction agent and renewable agent 50︰1, stirring time of 5 min, 30% mass fraction of regenerative agent. Under these conditions, the COD removal rate is above 98%.COD concentration in the raffinate can be limited to about500 mg/L. The used extractant can be reused after regeneration.
出处
《环境科技》
2015年第6期44-47,共4页
Environmental Science and Technology
基金
江苏省重点研发计划-产业前瞻与共性关键技术(BE2015201)
关键词
H酸
废水
络合萃取
三烷基胺
预处理
染料中间体
H acid
Wastewater
complexation extraction
Alamine 336
Pretreatment
Dye intermediate
