摘要
针对南方饮用水源水氨氮和有机物浓度季节性上升的特点,开展了活性无烟煤多功能滤池处理高氨氮原水的中试研究。中试处理规模为120 m3/d,滤速为8 m/h,原水氨氮平均浓度为3.1 mg/L。试验结果表明,滤池进水溶解氧浓度不足会导致工艺出水氨氮浓度高于《生活饮用水卫生标准》(GB 5749—2006),同时伴随有亚硝态氮的积累;当采用纯氧曝气提高滤池进水DO至11.9～13.6 mg/L后,活性无烟煤滤池的净水效果大幅提高,出水氨氮<0.1 mg/L,亚硝态氮浓度几乎为零,氨氮全部转化为硝态氮,氨氮有效去除浓度与所需DO浓度的比值平均为1∶4.49。在纯氧曝气条件下,滤池对氨氮的去除率达到97%,对CODMn和UV254的去除率均在44%左右。
A pilot-scale test to remove seasonally affected ammonia nitrogen and organic matters from raw water was carried out in a multi-functional filter with activated anthracite in southern China. The test scale was 120 m^3/d, filtration speed was 8 m/h and average NH3 - N concentration of raw water was around 3.1 mg/L. The results showed that insufficient DO in the influent led to a higher NH3 - N con- centration in the effluent than the Standards for Drinking Water Quality （GB 5749 -2006 ）, along with the accumulation of NO2- - N. Pure oxygen aeration could enhance the removal performance of the filter. The average concentrations of NH3 - N and NO/ - N in the effluent were less than 0.1 mg/L and almost zero when DO in the influent got up to 11.9 to 13.6 mg/L, respectively. NH3 -N was totally converted into NO3 - N, and the average ratio of degraded NH3 - N and DO was 1 ： 4.49. The removal rates of NH3 - N, CODMn and UV254 were 97%, 44% and 44%, respectively.
出处
《中国给水排水》
CAS
CSCD
北大核心
2012年第15期36-40,共5页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2008ZX07423)
关键词
活性无烟煤
多功能滤池
纯氧曝气
氨氮
activated anthracite
multi-functional filter
pure oxygen aeration
ammonia ni-trogen
