UCT工艺处理高浓度氨氮生活污水的试验研究

Study on UCT process to treat high concentration ammonia nitrogen domestic wastewater

采用UCT工艺处理高浓度氨氮生活污水,并对其处理能力及影响因素进行了研究。结果表明,稳定运行的UCT工艺系统对高氨氮生活污水的处理效果较好,出水基本达到GB 18918—2002中一级A排放标准,运行较为稳定;对于高浓度氨氮生活污水,增加好氧区污水停留时间能有效提高系统的硝化效率,提高氨氮去除率;硝化液回流比对氨氮和总氮的去除都有影响,提高回流比,氨氮去除率有一定的上升趋势,总氮去除率先升后降;好氧池中的曝气量对硝化效果影响较大,较大的曝气量可明显提高系统的硝化效率,但也会产生一些负面影响;系统运行效果受碳源不足影响较大,投加碳源能明显提高系统的脱氮除磷效率。

The University of Capetown（UCT） process treatment capability and influence factors on high concentration ammonia nitrogen domestic wastewater were studied in this paper. The result showed that：a stably running UCT process system had better treatment effect, and the effluent water met the first A grade of GB 18918-2002. Increasing the HRT of aerobic zone was an effective way to improve am monia nitrogen removal. The mixed liquid recycle ratio had effect on ammonia nitrogen and total ni trogen removal, with the ammonia nitrogen removal rate increasing gradually in a way, and the to- tal nitrogen removal rate firstly increased and then decreased. Aeration rate of aerobic zone had a greater impact on the nitrification efficiency. Keeping a large aeration rate could significantly ira prove nitrifiCation efficiency, but also had some on system＇s rtinning results, and adding carbon gen and phosphorus removal negative effects. Lack of carbon had greatly effect could significantly improve the efficiency of nitrogen and phosphorus removal.