Study On Nitrogen And Phosphorus Removal In SBBR System

SBBR system is a new process which have been growing recently. It have so many virtues, such as high efficiency, low consumption and so on. This article have studied on the removal efficiencies of nitrogen and phosphorus, basing on comparing with the normal SBR system. It is the conclusion that when HRT was 6.5h(feeding took 15min, reactor took 300min, settle took 65min, decant took 10min), the quantum of air was 0.14m3/h, the pH value was between 7.0 and 7.2, and the influent of NH4+ -N, TP were 21.45-50.92 mg·L-1, 2.34-7.13 mg·L-1 respectively, The NH4 +-N, TP removal rate were 70-85%, 70-98% (the effluent were below the B grade of first grade discharge standard of GB18918-2002). But the trend of one cycle have been also studied in the SBBR system. We found that there was no accumulated NOx-N in the nitrogen removal process, and there was no obvious released phosphorus in the phosphorus removal process.Basing on the study above, the influence of different concentration of added FeCl3 has been studied in SBBR system. It was discussed how FeCl3 influence on the biofilm in SBBR system through the trend of NH4+-N and TP removal in one cycle. The conclusion was that the excessive dosage of...