上流式曝气生物滤池两种填料启动挂膜的试验研究

Experimental Studies on Cultivation and Start-up Methods of Two Kinds of UBAF Biofilm

在相同运行条件下,对瓷粒和陶粒2种不同填料曝气生物滤池(BAF)的启动运行进行了实验研究,考察了不同填料在挂膜过程中CODCr和NH4+-N的去除效果及出水NO2--N和NO3--N质量浓度的变化。结果表明,在常温下(20～25℃)2种填料的所需的启动时间差异较大,陶粒填料所需时间为17d,而瓷粒填料则需37d。启动挂膜过程中,两者对CODCr和NH4+-N可达到基本相同的去除率,但所需运行时间差异较大,陶粒BAF较之瓷粒BAF稳定,且硝化效果好于瓷粒BAF。

The laboratory-scale study was can＇ied out on the start-up and biofilm cultivation performance of two biological aerated filters （BAF） with ceramsite and porcelain carriers at the same operational conditions, and the CODCr and NH4^＋-N removal rate and NO2^--N and NO3^--N concentration in effluent of both BAFs were monitored during operation. The results showed that the time needed for start-up of both ceramsite and porcelain particle carriers were different, for the ceramsite particle carrier 17 days needed but for porcelain particle carrier 37 days needed at ambient temperature （20-25 ℃）. The two BAFs could reach the nearly same CODCr and NH4^＋-N removal efficiencies but different operational time was needed, It was also found that the BAF with ceramsite particle as biofilm carrier was much steadier and could reach a much better nitrification than the case in the BAF with porcelain particles.