接触氧化/生物过滤工艺预处理微污染高浊度源水

针对微污染高浊度源水的水质特点,采用接触氧化/生物过滤组合工艺对其进行预处理,并与传统曝气生物滤池(BAF)工艺进行对比。结果表明,接触氧化/生物过滤组合工艺对CODMn、UV254的平均去除率分别为33.3%、23.4%,优于BAF工艺的;而对亚硝态氮和氨氮的去除率分别为81.7%、82.6%,略低于BAF工艺的;对浊度的平均去除率为74.2%,比BAF工艺的高出了约30%;与无预处理工艺相比,接触氧化/生物过滤工艺可使后续混凝处理平均节省23.1%的投药量,而BAF工艺仅节省11%的投药量。

Pretreatment of Micro-polluted Source Water with High Turbidity by Contact Oxidation/Biofiltration Process

The combined process of biological contact oxidation and biofiltration was applied to pretreat micro-polluted source water with high turbidity. A comparison was made between the combined process and biological aerated filter (BAF) process. The results show that the average removal rates of COD_(Mn), and UV_(254) by the combined process are 33.3% and 23.4%, higher than those by BAF. Howev-er, the removal rates of nitrite nitrogen and ammonia nitrogen are 81.7% and 82.6%, slightly lower than those by BAF. The average removal rate of turbidity is 74.2%, being 30% higher than that by BAF. An average of 23.1% flocculant dosage is saved using the combined pretreatment process com-pared to the process without biological pretreatment, which is larger than the 11% dosage saved by BAF.