钢铁企业外排综合废水的处理回用是降低吨钢耗新水量的有效途径.通过宝钢围厂河调研可知,围厂河接纳的废水资源量丰富,但较高的Fe、Mn浓度限制了其资源化利用.研究了将锰砂作为填料应用于人工湿地中处理宝钢外排综合废水,结果表明,锰砂人工湿地可有效去除废水中的Fe、Mn等污染物,出水达到了<城市污水再生利用工业用水水质>(GB/T 19923-2005)和宝钢生产用水的水质要求.锰砂人工湿地运行稳定,受水力停留时间HRT、季节、温度等因素影响较小,运行成本较低,具有良好的经济效益.
Reclamation of mixed treated wastewater discharged from iron and steel enterprises is an effective way to reduce water consumption.The Wai River of the Baosteel is rich of treated wastewater,but its high iron and manganese concentration limits its application in reuse.Constructed wetland with manganese ore media was studied in the reclamation of the steel wastewater.The results show that Fe,Mn could be removed effectively.The effluent could meet to"The reuse of urban recycling water-water quality standard for industrial uses"(GB/T 19923-2005)and quality requirements of Baosteel process water.Manganese ore wetland performs stably showing litter dependence on HRT,season alternation,temperature,and etc.The operation cost is lower than the cost of city water,indicating significant economic benefits.
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