摘要
通过调整前好氧池的曝气量,重点考察了多点交替进水阶式A2/O工艺的强化脱氮效果。结果表明,在试验条件下,前好氧池的曝气量宜控制在0.15 m3/h,此时前好氧池的DO浓度保持在1.0～1.3 mg/L的较低水平,增强了同步硝化反硝化作用,提高了脱氮除磷效果。同时,降低前好氧池曝气量后,减少了反应池由好氧状态向缺氧状态转换的时间,延长了缺氧状态的有效时间,提高了缺氧反应效率,降低了运行能耗。在实际工程中,可以通过控制前好氧池DO浓度(稳定在0.6～0.8 mg/L)而对曝气量做相应调整。
The enhanced denitrification effect of step A2/O process with commutative multi-influ- ent was investigated by regulating aeration rate in a anterior aerobic tank. Under experimental conditions, the aeration rate in the anterior aerobic tank should be controlled at 0.15 ma/h. At this aeration rate, DO concentration was 1.0 to 1.3 mg/L, simultaneous nitrification and denitrification （SND） was enhanced, and nitrogen and phosphorus removal rates were improved. Meanwhile, with lower aeration rate, the re- quired time for transforming reactor from aerobic to anoxic conditions was reduced. The effective time of anoxic condition was increased, the anoxic reaction efficiency was improved, and the energy consumption was reduced. In engineering practice, the aeration rate could be adjusted by controlling DO concentration in the anterior aerobic tank steadily at 0.6 to 0.8 mg/L.
出处
《中国给水排水》
CAS
CSCD
北大核心
2012年第13期129-132,共4页
China Water & Wastewater
基金
教育部科学技术研究重大项目(308010)
江苏省太湖专项(BS2007114)
江苏省科技支撑计划项目(BE2008667)
关键词
多点交替进水阶式A2/O工艺
曝气量
脱氮
同步硝化反硝化
节能
step A2/O process with commutative multi-influent
aeration rate
denitrification
simultaneous nitrification and denitrification （SND）
energy saving
