【摘要】 为了提高低C/N(3.0~3.5)生活污水的脱氮除磷效率,对设置选择池和厌氧池的氧化沟工艺采用了微孔曝气加搅拌的实验方式和连续流间歇曝气的运行方式,通过对总循环周期(tc)、曝气率(fa)以及出水稳定性的分析讨论,得出TN负荷在0.02 kg N/kgMLSS.d下,控制氧化沟曝气时间与总停留时间比在40%左右时,能实现80%以上的除氮率和35%以上的除磷率。与连续曝气氧化沟相比,不仅出水水质更好,而且节省能量。更多还原

【Abstract】 In order to improve the nitrogen and phosphorus removal efficiency of domestic sewage with low C/N ratio,an oxidation ditch with selector and anaerobic tank is studied.During the study,the aeration and agitation are separated,and continuous flow and intermittent aeration are carried out.Through the discussion of the total cycle time(t_c),aeration ratio(f_a)and effluent stability,we can conclude that about 40% aeration time is needed when TN load is 0.02 kg N/kg MLSS·d to remove more than 80% of nitrogen and 35% of phosphorus. Comparing with the continuous aeration system,the intermittent aeration system can obtain better effluent quality and save energy.更多还原