摘要
以采用化学协同除磷工艺的城镇污水处理厂为研究对象,对比分析了厌氧池中PO3-4-P的实测浓度与理论加权浓度的关系,并对乙酸钠强化回流污泥生物释磷效果进行了模拟试验,结果表明,化学除磷药剂的摩尔当量超过1时厌氧池的释磷效果不显著;回流污泥投加磷酸盐的模拟试验结果表明,采用化学除磷的污水厂回流污泥中均含有一定量的有效除磷药剂。根据试验研究结果对化学除磷药剂在污水生物处理单元的迁移转化规律进行了分析,结果表明,化学协同除磷将在一定程度上影响甚至逐步削弱生物除磷功能。
In the selected WWTPs using simultaneous chemical phosphorus removal process, the relationship between the measured concentration and the theory weighted concentration of PO4^3- - P in an- aerobic tank was analyzed, and simulation experiment of the biological phosphorus release from refluxed sludge strengthened by sodium acetate was conducted. The results showed that when the molar equivalent of chemicals was over one, the function of anaerobic phosphorus release was inhibited. The refluxed sludge contained a certain amount of effective chemicals. The migration and transformation rules of phos- phorus removal chemicals in biological wastewater treatment units were analyzed. The results showed that simultaneous chemical phosphorous removal gradually weakened the function of biological phosphorus removal.
出处
《中国给水排水》
CAS
CSCD
北大核心
2015年第19期68-71,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(2013ZX07314002)
关键词
污水处理厂
化学协同除磷
生物除磷
摩尔当量
PO4^3--P浓度
wastewater treatment plant
simultaneous chemical phosphorus removal
cal phosphorus removal
molar equivalent
PO4^3 -P concentration biologi-
