摘要
采用曝气生物滤池（BAF）处理景观水体，研究了低温（8-12℃）条件下BAF的处理性能。结果表明，在1.42-6.37m/h的范围内提高水力负荷，BAF对COD的去除率先增加后降低，对氨氮的去除率则逐渐降低；在2.12、3.54和4.95m／h这三个水力负荷下，对TN的去除率和化学除磷率均随水力负荷的增加而降低；水力负荷越大则反冲洗周期越短，当进水量分别为150、350L／h时，BAF分别可连续运行120、100h；在一个运行周期内，反冲洗去除的COD、TN和TP量分别占总去除量的1／6、1／3和1／2左右。
The performance of biological aerated filter （BAF） for the treatment of low-temperature landscape water （8 to 12℃） was studied. The results indicate that the COD removal rate first increases, then decreases, and NH^＋4 -N removal rate decreases with the hydraulic loading ranging from 1.42 m/h to 6.37 m/h. The TN removal rate and the chemical phosphorus removal rate decrease with hydraulic loading increasing at 2.12, 3.54 and 4.95 m/h, respectively. The backwash cycle is shortened with the increase of hydraulic loading, and under the inflow rate of 150 L/h and 350 L/h, BAF can continuously operate for 120 h and 100 h, respectively. During one period, one sixth of COD and one third of TN and half of TP are removed by the backwashing.
出处
《中国给水排水》
CAS
CSCD
北大核心
2009年第17期66-69,共4页
China Water & Wastewater
基金
国家科技支撑计划项目(2007BAK27B05-4)
关键词
曝气生物滤池
景观水体
低温
反冲洗
biological aerated filter （BAF）
landscape water
low temperature
backwash
