新型生物滤池处理高藻高氨氮原水

A Novel Biological Filter for the Treatment of High Algae and High Ammonia Nitrogen Raw Water

针对我国东部河网地区原水的高藻高氨氮水质污染特征,研发了沸石-活性炭-悬浮球填料级配的新型曝气生物滤池(BAF),并进行了处理高藻高氨氮原水研究。结果表明,级配沸石-活性炭的R1和级配悬浮球生物-沸石-活性炭的R2、R3启动阶段NH_4^+-N平均去除率分别为84.8%±10.5%和95.6%±2.5%、97.7%±2.3%,TOC平均去除率分别为47.9%±24.6%和54.4±22.9%、63.4±12.6%,R2、R3具有较高的TOC和氨氮去除性能。当系统HRT降至4 h、曝气气水体积比降为4:1后,3组BAF的NH_4!+-N平均去除率分别降为76.4%±13.0%、90.6%±5.1%和98.0±1.8%,其中R2和R3的BAF启动时间短、NH_4!+-N去除率高;同时,对藻细胞有较好的截留作用,藻类去除率稳定在65%以上。

Based on the raw water quality characteristics of high algae and ammonia nitrogen in Eastern China, a new biological aerated filter （BAF） was developed with three different filtration materials of zeolite, granular activated carbon（GAC） and suspended biological carriers, and the treatment of high algae and ammonia nitrogen raw water was researched. The results showed that at the reactors R1 （zeolite-activated carbon） and R2, R3 （suspended biological carriers-zeolite-activated carbon） start-up phase, the average removal efficiencies of NH4＋-N were 84.8%±10.5%, 95.6%±2.5% and 97.9%±2.3% respectively and the average TOC removal efficiencies was 47.9%±24.6%, 54.4%±22.9% and 63.4%±12.6% respectively, the reactors （R2, R3） were more stable than R1 reactor. When HRT is reduced to 4h and the aeration intensity to 4：1, the average NH4＋-N removal rates reach to 76.4%±13.0%, 90.6%±5.1% and 98.0%±1.8% for R1, R2 and R3 reactors. R2 and R3 bioreactors had a shorter start-up time, a higher removal efficiency of NH4＋-N and good intercept of algal ceils, the algal removal rate could reach above 65%.