摘要
研究了桂林七里店污水净化厂的Carrousel氧化沟系统升级改造后的运行效果。结果表明,升级改造后系统对氨氮和总磷的去除率分别可达到60%和80%以上,出水水质基本达到了GB 18918—2002的一级B标准;该厂夏季的进水量比冬季高40%左右,夏季的进水污染负荷相对较低;夏季的氨氮去除率比冬季高20%以上,其他污染物的去除率在冬、夏两季差别不大。沿程水质监测结果显示,氧化沟内部存在缺氧区、厌氧区、好氧区等明显的生物功能区段;流速、水温、DO浓度等因素对水质沿程分布影响较大,10月份的氨氮去除率比4月份高25.6%;硝态氮浓度对释磷过程具有明显的抑制作用,4月份的释磷效率是10月份的1.5倍。
The operation effect of the upgraded Carrousel oxidation ditch system of Qilidian WWTP in Guilin was investigated. The results showed that the removal rates of NH4 - N and TP in the upgraded Carrousel oxidation ditch system were up to 60% and 80% respectively, and that the effluent quality met the first level B criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treat- ment Plant （ GB 18918 -2002）. The influent quantity in summer was about 40% higher than in winter. In summer, the pollutant loading was lower and the removal rate of NH4 - N was above 20% higher than in winter. There was no difference in removal of other pollutants in summer and winter. Biological function zones, such as anoxic zone, anaerobic zone and aerobic zone, were present in the ditch. Flow rate, temperature and DO had great influence on the wastewater quality distribution in the ditch. The measured removal rate of NH^＋4-N in October was 25.6% higher than in April. Nitrate inhibited phosphorus release in the ditch, and the phosphorus release rate in April was 1.5 times of that in October.
出处
《中国给水排水》
CAS
CSCD
北大核心
2012年第19期92-96,共5页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2008ZX07317-02)
