摘要
采用传统A2/O工艺处理市政污水时出水水质很难达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准。青岛城阳污水处理厂采用改良A2/O分段进水工艺进行升级改造,通过分段进水的形式强化系统对原水中碳源的利用,提高对污染物的去除能力。运行结果表明,经改良后生物池对COD、NH4+-N和TN的去除率分别能够稳定维持在86.25%、95%和66%以上,最终出水平均值分别为38、1.57和13.56 mg/L,满足一级A排放标准;对TP的去除率在81.40%以上,在深度处理时投加少量氯化铁进一步对磷进行去除,出水值也达到了一级A标准。经改良后,生物池出水水质在达到一级A标准的基础上每天可节省电耗约672 kW·h。
When the traditional A^2/O process is used to treat municipal wastewater, the effluent quality can hardly meet the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （GB 18918 -2002）. The modified step-feed A^2/O process was adopted for upgrade and reconstruction of the Qingdao Chengyang WWTP. Adopting step-feeding patterns en- hanced the carbon source use and the removal efficiency of pollutants. The results showed that the remov- al rates of COD, NH4 - N and TN in the biological tank were more than 86.25%, 95% and 66% , re- spectively, and the average effluent concentrations were 38 mg/L, 1.57 mg/L and 13.56 mg/L respectively, meeting the first level A criteria discharge standard. The removal rate of TP was more than 81.40%, and effluent TP concentration satisfied the first level A criteria discharge standard after the addition of iron chloride in the advanced treatment for phosphorus removal. At the same time, the biological tank saved 672 kW · h of power consumption per day.
出处
《中国给水排水》
CAS
CSCD
北大核心
2012年第7期22-26,31,共6页
China Water & Wastewater
基金
"十一五"国家科技支撑计划重点项目(2009BAC57B01)
国家水体污染控制与治理科技重大专项(2008ZX07317-007-105)
关键词
A2/O工艺
分段进水
升级改造
悬浮填料
一级A标准
节能降耗
A^2/O process
step-feed
upgrading and reconstruction
suspended carrier
the first level A criteria
energy saving and consumption reducing
