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混凝预氧化过滤工艺对冬季低温微污染地下水处理
Study on Coagulation/Pre-oxidation/Filtration Process for Treatment of Groundwater with Micro-polluted in Winter
【摘要】 目的确定最佳混凝预氧化过滤工艺条件,解决低温微污染地下水处理难度较大的问题.方法在低温实验室配制微污染地下水,通过投加混凝剂,ClO2、NaClO两种预氧化剂以及锰砂、陶粒锰砂二级过滤,以Fe、Mn、CODMn、氨氮(NH4+-N)、浊度等指标为参照,对比两种预氧化剂分别和两种滤料二级过滤的运行效果.结果混凝-二氧化氯预氧化-陶砂锰砂二级过滤工艺对Mn的去除效果在标准值边缘,Fe、CODMn、NH4+-N、浊度等指标的质量浓度均满足《生活饮用水卫生标准检测方法》(GB/T5750—2006),该工艺对微污染地下水有较高的去除率.结论混凝-二氧化氯预氧化-陶砂锰砂二级过滤工艺对低温微污染地下水处理效果较好.
【Abstract】 The best operating conditions for coagulation oxidation filtration process is determined to solve the problem of low-temperature micro-polluted groundwater treatment. All experiments were carried out in low-temperature laboratory. The micro-polluted groundwater was treated by adding coagulant and two pre-oxidant-ClO2,NaClO,then through manganese sand,ceramist manganese sand filter. Fe,Mn,CODMn,ammonia nitrogen( NH4+-N),turbidity and other indicators were detected to obtain the best process. The results showthat the concentration of Mn in the micro-polluted groundwater treated by the process of coagulation + chlorine dioxide oxidation + secondary filtration of ceramic sand manganese sand is on the edge of the standard,Fe,CODMn,NH4+-N,the concentration of the turbidity and other indicators meet the "drinking water health standard testmethod"( GB/T5750—2006). So the process of coagulation + chlorine dioxide oxidation + secondary filtration of ceramic sand manganese sand can be adopted to treat micro-polluted groundwater under lowtemperature.
【Key words】 micro-polluted groundwater; pre-oxidation treatment; secondary filtration; chlorine dioxide; sodium hypochlorite;
- 【文献出处】 沈阳建筑大学学报(自然科学版) ,Journal of Shenyang Jianzhu University(Natural Science) , 编辑部邮箱 ,2019年01期
- 【分类号】X523
- 【被引频次】1
- 【下载频次】81