pH值和纯氧曝气对氨氮去除的影响研究  

Effect of pH and Pure Oxygen Aeration on Ammonia Nitrogen Removal

作　　者：陈丽珠 巢猛 丁卫 刘清华 陈卓华 

机构地区：[1]东莞市东江水务有限公司,广东东莞523112

出　　处：《中国给水排水》2016年第9期58-61,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07423-003)

摘　　要：针对南方饮用水源水氨氮季节性、突发性污染的特点,在中试条件下,结合水厂传统制水工艺和活性无烟煤滤池联用纯氧曝气,探讨p H值对氨氮去除效果的影响机理,并进行成本核算,重点考察了砂滤池、活性无烟煤滤池、活性无烟煤联用纯氧曝气三组制水工艺在不调节p H值和调节p H值为7.2、7.4、7.6、7.8、8.0、8.2、8.4、8.6条件下氨氮浓度变化及去除量。结果表明,调节p H值后,对氨氮的去除效果提高。在p H值为8.0时,这三组工艺对氨氮的绝对去除量分别为1.23、1.72、3.05 mg/L,活性无烟煤联用纯氧曝气对氨氮的去除效果最好。投加Na OH调节p H值,待滤水相对于原水p H值下降,滤后水的p H值进一步降低;投加Na OH调节p H值为8.0,成本约为0.031元/m3水,适用于水厂应对季节性、突发性氨氮污染。To address the problems of seasonal southern drinking water source, the effect of pH value and sudden pollution of ammonia nitrogen in the on removal of ammonia nitrogen was investigated, and the cost accounting was performed based on the traditional water treatment process and activated anthracite filter with pure oxygen aeration. The ammonia nitrogen concentrations and removal rates were investigated without adjusting pH and with adjusting pH to 7.2, 7.4, 7.6, 7.8, 8.0, 8.2, 8.4 and 8.6 for sand filter, activated anthracite filter and activated anthracite filter with pure oxygen aeration, respectively. The results showed that the removal efficiency of ammonia nitrogen could be improved after adjusting pH. When pH was 8.0, the removal rates of ammonia nitrogen by the three groups of processes were 1.23 mg/L, 1.72 mg/L and 3.05 mg/L respectively. The best removal efficiency was achieved by the group of activated anthracite filter with pure oxygen aeration. The pH of the water to be filtered decreased, and the pH of the filtered water decreased further when pH was adjusted with addition of NaOH. The cost of NaOH for adjusting pH to 8.0 was about 0.031 yuan/m^3. It was applicable to water treatment plants to respond to seasonal and sudden pollution of ammonia nitrogen.

关 键 词：氨氮 PH值 纯氧曝气 活性无烟煤滤池 

分 类 号：TU991.24[建筑科学—市政工程]