电解锰高浓度氨氮废水回用实验研究

电解锰废水中氨氮浓度高,最高达13 000 mg/L,现有处理技术存在诸多弊端。从清洁生产的角度提出电解锰废水除铬净化后回用处理电解锰高浓度氨氮废水的方法并进行实验研究。研究结果表明:10 mL/L电解锰除铬废水回用至生产工艺化合工段,电解液净化试剂H2O2、SDD消耗量和电流效率较无回用时无明显变化;电解过程中,无电解锰发黑、返溶等异常现象出现;电解产品符合YB/T 051—2003 DJMnD标准,纯度达99.9%。

EXPERIMENTAL STUDY ON TREATMENT AND REUSE OF HIGH CONCENTRATION AMMONIA NITROGEN WASTEWATER FROM ELECTROLYTIC MANGANESE

Electrolytic manganese wastewater contains high concentration of ammonia nitrogen,whose highest-level is at 13 000 mg/L.The available treatment technologies have many disadvantages.It was put forward the method to heat and reuse electrolytic manganese wastewater after removing chromium from it according to cleaner production principle.The experiment result showed that the consumption of electrolyte purifier reagent(H2O2、SDD)and current efficiency were almost the same as no reuse when 10 mL/L electrolytic manganese wastewater without chromium was reused to electrolytic manganese combined process.There was no unusual phenomenon such as nigrescence,dissolved and so on during electrolysis process.Electrolytic manganese metal products purity was up to 99.9% and could meet YB/T 051-2003 DJMnD standard.