摘要
为解决传统工艺同步脱氮除磷效率低的问题,采用分段进水A/O工艺处理高氨氮浓度生活污水,考察了在低COD/TN值(平均为3.8)条件下曝气量和协同化学除磷对系统去除COD、氨氮、TN和TP的影响。在0.7、0.5和0.3 m3/h三种曝气量条件下,系统对COD的去除效果稳定,平均去除率分别为87.97%、90.72%和91.27%;在曝气量为0.5 m3/h的条件下,通过对各好氧区DO浓度的优化分配,对氨氮的去除率达到了95%以上,并且由于发生了好氧反硝化,对TN的去除率明显高于其他两种工况;在碳源成为脱氮除磷限制因素的条件下,平均除磷率分别为31.76%、32.84%和44.49%,通过同步投加聚合氯化铝和硫酸铝的复配药剂,出水TP浓度基本达到了0.5 mg/L。
In order to improve the efficiency of simultaneous nitrogen step-feed A/O process was used to treat high ammonia nitrogen domestic sewage and phosphorus removal, The removal efficiencies of COD, ammonia nitrogen, total nitrogen and total phosphorus were investigated under average COD/TN ratio of 3.8, different aeration rates and chemical phosphorus removal. When the aeration rates were 0.7, 0.5 and 0.3 m3/h, the average removal rates of COD were 87.97% , 90.72% and 91.27% , re- spectively. When the aeration rate was 0.5 m3/h, the ammonia nitrogen removal rate was more than 95 % with optimal distribution of DO concentration in the aerobic tank. Moreover, the total nitrogen re- moval was higher at 0.5 m3/h because of aerobic denitrification. When carbon source was the factor lim- iting nitrogen and phosphorus removal, the average removal rates of phosphorus under the three aeration rates were 31.76% was about O. 5 mg/L 32.84% and 44.49%, respectively. after adding mixed flocculant of PAC Total phosphorus concentration in the effluent and A12 （ SO4 ） 3.
出处
《中国给水排水》
CAS
CSCD
北大核心
2013年第17期20-23,共4页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2012ZX07204-001-02-01)
关键词
分段进水
高氨氮污水
曝气量
脱氮除磷
step-ieed
high ammonia nitrogen sewage
aeration rate
nitrogen and phos-phorus removal
