Research on Optimum Operating Condition of SBR for Nitrogen and Phosphorus Removal
In order to explore the optimal reaction conditions of SBR for treating urban domestic wastewater,the process flow of"raw water-aeration-anoxia-anaerobism-aeration-sedimentation-drainage-idleness"was used to separate the removal of nitrogen and phosphorus,and the optimal flow ratio of staged influent and the optimal reaction time of each stage were studied.The results showed that for the removal of total phosphorus and COD,the highest removal rates were 83.69%and 91.64%in influent A mode(flow ratio 7∶3).For the removal of total nitrogen and ammonia nitrogen,the C influent mode(flow ratio 9∶1)had the highest removal rate with 83.40%and 93.50%,respectively.At the same time,it was found that the optimal operating condition for nitrogen and phosphorus removal was when the effective reaction time was 12 h.
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