Effect of SRT on the Denitrifying Dephosphorylation Process

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In order to achieve the simultaneous denitrification and dephosphorization from wastewater, the effect of SRT on denitrifying dephosphorylation process was investigated for a long time by using an anaerobic/anoxic sequencing batch reactor (A2SBR). The results showed that when SRT was controlled at 20 days, removal efficiency of PO43--P was kept at high value and it was higher than 90%, and removal efficiency of NO3--N and COD was 90.3% and 80.4%, respectively. A2SBR process can be operated steadily by using a periodical operation mode of 10min feeding, 2.5 h anaerobic and 3.5 h anoxic followed by 10 min aerobic, 90 min setting and 10 min withdraw. The whole system shows a good performance of denitrification and dephosphorization under a steady operation.

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406-409

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October 2014

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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