摘要
一种酒红色石化碱渣废液,碱浓度为10%,COD值为110 000 mg·L^(-1),硫化物平均含量为2%,不能直接进行生化处理。向碱渣中加入4.5%浓硫酸中和处理,提取碱渣废液中7.5%的有机物组分,利用Na OH调节废液中过量的酸至中性后,进行电催化氧化处理,处理条件为:电解时间为2 h;电流为300 A;电压为1.47 V;处理量为1 L;极板间距为1.5cm;吨水电耗为98.0 k W·h^(-1);电流效率为54.61%。最终出水COD为38 mg·L^(-1),出水能够实现≤50 mg·L^(-1)的排放标准。
Because the alkali concentration,chemical oxygen demand（ COD）,and average sulfide concentration of a type of red petrochemical-spent caustic wastewater were 10%,110 000 mg·L^-1and 2%,respectively,it was difficult to treat with a biochemical process directly. The results show that 7. 5% of the organic components of such wastewater were removed when 4. 5% concentrated sulfuric acid was added,followed by Na OH to neutralize the excess acid. Finally, an electrocatalytic oxidation process was used to treat this wastewater as follows： electrolysis time of 2 hours,current of 300 A,voltage of 1. 47 V,processing capacity of1 L,distance between electrode plates of 1. 5 cm,electric consumption of 98. 0 k W·h^-1per ton of wastewater,and current efficiency of 54. 61%. The results show that the COD of the processed wastewater was 38 mg·L^-1,which is below the COD effluent standard of 50 mg·L^-1.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第12期7035-7038,共4页
Chinese Journal of Environmental Engineering
基金
中国海洋石油总公司科技项目(CNOOC-KJ.125.ZDXM.26.TJY.02.TJY.2013-02)
关键词
石化碱渣
浓硫酸中和
电催化氧化
petrochemical spent caustic
concentrated sulfuric acid neutralization
electrocatalytic oxidation
