亚氨基二乙酸鳌合树脂处理氨基酸生产含铜废水

Iminodiacetic Acid-Based Resin Treating Copper Containing Wastewater from Production of Amino Acid

针对氨基酸生产过程中产生含铜废水的水质和水量,依据亚氨基二乙酸大孔型螯合树脂(IDA-IDA)对Cu^(2+)高选择性吸附的作用,通过小试确定IDA-D851螯合树脂的吸附交换容量、吸附及稀硫酸解吸关键条件,据此设计确定了预过滤和IDA-D851功能基螯合树脂2级吸附相结合的处理工艺,建立了5 m^3/h的处理工程。实际运行结果表明,可将废水中Cu^(2+)的质量浓度从1~3 g/L降低到0.5 mg/L以下,排水达到GB 25467-2010的要求,同时实现了Cu SO_4回收和重新利用,每年为企业节约费用219万元。

Aimed at the quality and quantity of copper-containing wastewater from production of amino acid,and according to the high-selective adsorption of Cu^2＋by large-pore iminodiacetic acid-based resin（IDA-IDA）,small-scale experiment was tested to determine the adsorption exchange capacity,key conditions of adsorption and dilute sulphuric acid desorption of IDA-D851.Pre-filtration and IDA-D851 second-order adsorption combined treatment process was confirmed and treatment project with 5 m^3/h capacity was built through the design.Practical running results showed that,the mass concentration of Cu^2＋could reduce from 1~3 mg/L to under 0.5 mg/L,the drainage met the requirement of GB 25467-2010,and the recycle and reuse of Cu SO4was realized.The process could reduce 2.19 million yuan/year for enterprise.