UnFied SBR系统处理生活污水脱氮除磷的性能优化

采用UniFed SBR工艺试验装置处理低C/N、C/P的实际生活污水,通过改变传统运行模式优化系统的脱氮除磷性能.结果表明,将进水时间由2h延长至3h、4h,在处理无外加任何碳源的生活污水时(C/P=30.18),系统磷平均去除率由59.93%增至88.45%,使出水磷维持在1 mg/L以下.在另一种缺氧-好氧运行模式中,使C/N为2.57的原水中有限有机底物得到充分利用,使出水TIN有了明显的降低,去除率由49.54%提高至60.75%.在缺氧-好氧交替模式运行中,N、P去除效率均有大幅提高,此种运行模式不仅充分利用原水中的有机底物,并在缺氧搅拌段2发生了反硝化吸磷现象,达到了一碳两用的目的,使得在C/N、C/P分别为2.57、30.18并无任何外加碳源的情况下,出水N、P浓度达到国家一级排放标准,适用于低碳源的实际生活污水的处理.

Optimization Effect of Nitrogen and Phosphorus Removal in UniFed SBR Process for Domestic Wastewater

Appropriate change of the traditional operation modes was investigated in a UniFed SBR lab-scale apparatus treating actual domestic wastewater with low C/N and C/P.Results showed that when the feed /decant time was extended from 2 h to 3 h and 4 h,the phosphorous removal efficiency increased from 59.93% to 88.45% without any external carbon source.In the mode of anoxic-aerobic condition,TIN of the effluent reduced obviously,the removal efficiency increased from 49.54% to 60.75% for utilizing limited substra...