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为有效解决污染饮用水源(尤其是低温期氨氮)处理问题,进行了火山岩曝气生物滤池预处理技术及其节能运行研究。在气水比为1:1、进水氨氮为1.88~2.63 mg/L时,BAF采用间歇曝气方式能够和连续曝气方式一样使出水氨氮浓度小于《生活饮用水卫生标准》(GB5749—2006)中0.5 mg/L的限值。综合考虑相关因素,在常温期(水温≥10℃)最佳曝气方式为曝气0.5 h、停止曝气1 h,每天可以节约2/3的曝气量;在低温期(水温<10℃)最佳曝气方式为曝气0.5 h、停止曝气0.5 h,每天可以节约1/2的曝气量。此外,BAF对COD_(Mn)、亚硝酸盐氮和浊度也有一定的去除效果。
In order to effectively solve the problem of treatment of contaminated drinking water source (especially ammonia nitrogen in low temperature period), the volcanic aerated biological filter pretreatment technology and its energy-saving operation were studied. When the gas-water ratio is 1: 1 and the influent ammonia nitrogen is 1.88-2.63 mg / L, the intermittent aeration of BAF can make the ammonia nitrogen concentration of effluent less than the standard of sanitary drinking water (GB5749-2006) ) 0.5 mg / L limit. Taking the relevant factors into consideration, the optimal aeration method is aeration 0.5 h at room temperature (water temperature ≥10 ℃), aeration is stopped for 1 h and the aeration can be saved by 2/3 every day. In the low temperature (water temperature <10 ℃ ) The best aeration way is aeration 0.5 h, stop aeration 0.5 h, can save 1/2 aeration every day. In addition, BAF also has certain removal effects on COD Mn, nitrite nitrogen and turbidity.