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针对低污染原水进行叠式曝气生物滤池的自然挂膜启动实验。在HRT为20～30 min,温度为28～33℃,气水比为0.5,滤速为12.5 m/h的条件下,研究分析叠式曝气生物滤池在自然挂膜启动过程中各项水质指标的变化情况与生物膜生长之间的相互关系,判断挂膜启动的进程。结果表明,在南方夏季,叠式曝气生物滤池能够进行快速启动,经过7 d左右自然挂膜启动完成,对CODMn的平均去除率为33%,对氨氮的平均去除率达到85.5%,对亚硝酸盐氮的去除率为82.9%。
Aiming at the start-up experiment of natural biofilm formation of stacked biological aerated filter with low polluted raw water. Under the conditions of HRT of 20 ~ 30 min, temperature of 28 ~ 33 ℃, air-water ratio of 0.5, and filtration rate of 12.5 m / h, the results of stacked biofilters Changes in water quality indicators and the relationship between the growth of biofilm, to determine the process of starting the hanging membrane. The results showed that aerated biofilter could start rapidly in summer in the South China. After 7 days of natural biofilm activation, the average removal rate of CODMn was 33% and the average removal rate of ammonia nitrogen was 85.5% Nitrite nitrogen removal rate of 82.9%.