生物砂滤处理污水厂二级出水的硝化性能研究  

Study on Performance of Nitrification in Treatment of Secondary Effluent by Biological Sand Filter

作　　者：李思敏[1] 缪保芬[1] 李玉庆[2] 徐宇峰[1] Song Kune-kwan 

机构地区：[1]河北工程大学城市建设学院,河北邯郸056038 [2]天津创业环保集团股份有限公司,天津300381 [3]韩国东亚大学土木工程系,韩国釜山604714

出　　处：《中国给水排水》2010年第9期120-123,共4页China Water & Wastewater

基　　金：中韩国际合作项目;河北省科技支撑计划项目(07276713D)

摘　　要：采用生物砂滤工艺处理城市污水厂二级出水,考察了水温、气水比和水力负荷对其硝化性能的影响。结果表明,水温是影响氨氮去除效果的主要因素,当水温分别为(10～15)、(16～20)和(21～26)℃时,对NH4+-N的平均去除率分别为37.87%、51.03%和65.88%;当气水比分别为(1∶1)、(2∶1)、(3∶1)、(4∶1)时,对氨氮的平均去除率分别为42.43%、60.93%、65.80%、61.51%,即随气水比的增加,硝化效果先提高后降低;随着水力负荷的增加,硝化效果呈明显下降趋势,当水力负荷由2m3/(m2·h)增加到3m3/(m2·h)时,对NH4+-N的平均去除率下降了6.23%,当继续增至4m3/(m2·h)时,又下降了28.01%。水温、气水比、水力负荷是影响生物砂滤硝化性能的重要因素,其权重分别为0.355、0.289、0.283。通过合理控制反应条件,生物砂滤工艺可以实现较好的硝化效果。The biological sand filter process was used to treat the secondary effluent of WWTP, and the influences of water temperature, air-water ratio and the hydraulic loading on the performance of nitrification of biological sand filter were investigated. The results show that the water temperature is a significant factor influencing the ammonia nitrogen removal, and when the water temperatures are 10 to 15 ℃, 16 to 20 ℃ and 21 to 26 ℃ , the average removal rates of ammonia nitrogen are 37.87% , 51.03% and 65.88% respectively. When the air-water ratios are 1 ： 1, 2 ： 1, 3 ： 1 and4 ： 1, the average re- moval rates of ammonia nitrogen are 42.43% , 60.93% , 65.80% and 61.51% respectively. That is, with the increasing of air-water ratio, the nitrification effect first increases and then decreases. With the increasing of the hydraulic loading, the downtrend of nitrification effect is obvious. When the hydraulic loading increases from 2 m3/（m2 · h） to 3 m3/（m2 · h）, the average removal rate of ammonia nitrogen drops by 6.23 %. And when the hydraulic loading increases to 4 m3/（ m2 ~ h） , it drops by 28.01%.The temperature, air-water ratio and hydraulic loading are important influence factors, their weights are 0. 355, 0. 289 and O. 283 respectively. Good nitrification effect in the biological sand filter can be at- tained by proper control of the reaction conditions.

关 键 词：生物砂滤 硝化性能 水温 水力负荷 气水比 

分 类 号：X703[环境科学与工程—环境工程]