温度对AOA-SBR工艺同步脱氮除磷的影响

Effects of temperature on simultaneous nitrogen and phosphorus removal using AOA-SBR process

为了提高脱氮除磷的效率，采用序批式生物反应器（SBR）工艺处理模拟生活污水，考察了不同温度下N/P、污泥龄（SRT）对厌氧/好氧/缺氧序批式生物反应器（AOA-SBR）工艺同步脱氮除磷效能的影响。结果表明：当温度为10℃、N/P为2～3、SRT为20 d时，NH4＋-N、TN和TP去除率分别为78%、69%和56%，污泥产率YS为0.339 kgSS/（kgBOD5），污泥含磷率PC为4.68%。当温度为25℃、N/P为3～5、SRT为15 d时，NH4＋-N、TN和TP的去除率分别为88%、83%和91%，污泥产率YS为0.253 kgSS/（kgBOD5），污泥含磷率PC为6.35%。当温度为35℃、N/P为5～7、SRT为10 d时，NH4＋-N、TN和TP去除率分别为80%、66%和73%，污泥产率YS为0.225 kgSS/（kgBOD5），污泥含磷率PC为7.42%。污泥产率YS随着温度和污泥龄的增加而降低，通过调节温度和污泥龄能够实现污泥减量。

The simulated sewage wastewater was treated continuously using SBR process in order to improve the removal efficiency of nitrogen and phosphorus. Effects of mass ratio of nitrogen to phosphorus（N/P）and sludge retention time（SRT）on simultaneous nitrogen and phosphorus removal were investigated by using anaerobic/aerobic/anoxic sequencing batch reactor （AOA-SBR） at different temperatures. The results showed that removal efficiencies of NH4＋-N,TN and TP were 78%,69%and 56%,respectively,and sludge yield （YS）was 0.339 kgSS/（kgBOD5）,and phosphorus content in the sludge was 4.68%under the condition of N/P of 2-3 and SRT of 20d at 10 ℃. The removal efficiencies of a NH4＋-N,TN and TP weer 80%,66%and 73%,respectively and sludge yield （YS） was 0.225 kgSS/（kgBOD5）, and phosphorus content in the sludge was 7.42%under the condition of N/P of 5-7 and sludge age of 10d at 35 ℃. The removal efficiencies of NH4＋-N,TN and TP were 88%,83%and 91%,respectively and sludge yield） （YS）was 0.253 kgSS/（kgBOD5）,and phosphorus content in the sludge was 6.35%under the condition of N/P of 5-7 and SRT of 15d at 25 ℃. Sludge yield was reduced with the increasing temperature and SRT,and sludge reduction can be realized by adjusting the temperature and SRT.