新型一体化生物反应器的同步脱氮除磷影响因素研究

为了提高对污水的处理效能，设计了一种新型一体化生物反应器并采用其处理生活污水，研究了DO和HRT对同步脱氮除磷效果的影响，并探讨了其实现机理。试验结果表明：在进水COD为290～510mg／L、MLSS为2500mg／L、污泥龄为15d以及好氧区和缺氧区的溶解氧分别为2mg／L和0．2mg／L时，系统的脱氮除磷效果较好，对TN、TP的去除率分别可达80％和90％，DO过高或过低都会影响同步脱氮除磷的效果。控制DO为最优值，并保持其他操作条件相同，当HRT为12h时对总氮和总磷的去除率均在80％以上，随着HRT的延长，同步脱氮除磷效果反而下降。该一体化反应器集厌氧、缺氧和好氧区为一体，在一定的运行条件下能够实现同步脱氮除磷，是处理生活污水的有效方法。

Influencing Factors of Simultaneous Nitrogen and Phosphorus Removal in Novel Integrated Bioreactor

In order to enhance the sewage treatment efficiency, a novel integrated bioreactor was designed. The effects of HRT and DO on the simultaneous nitrogen and phosphorus removal in the integrated bioreactor and the pollutant removal mechanism were studied. The results indicate that when the influent COD is 290 to 510 mg/L, MLSS is 2 500 mg/L, sludge age is 15 d, and DO in aerobic and anoxic stages is 2 mg/L and 0.2 mg/L, the system has better removal effect of nitrogen and phosphorus, and the removal rates of TN and TP reach 80% and 90% respectively. The too high/low DO can influence the simultaneous nitrogen and phosphorus removal. When DO is controlled at the optimal value and other conditions are kept the same, the removal efficiencies of TN and TP reach over 80% respectively at HRT of 12 h, and the effect of the simultaneous nitrogen and phosphorus removal declines along with the HRT prolongation. The reactor integrates anaerobic, anoxic and aerobic stages, can realize the simultaneous nitrogen and phosphorus removal, and is an effective method for domestic wastewater treatment.