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Abstract：
In order to investigate the effect of volumetric exchange ratio on nitrogen removal in novel UniFed SBR process, two UniFed SBR reactors were operated at the volumetric exchange ratio of 25% and 42% respectively to treat real domestic wastewater. The effect of volumetric exchange ratio on nitrogen removal was analyzed by comparing the degradation rules of TN during a whole cycle and TN concentrations of effluent at 6 group identical feed ρ (C)/ρ (N) ratios at 25% and 42% respectively. The results showed that when UniFed SBR process was operated at any volumetric exchange ratio, a corresponding maximum TN removal efficiency η1max during feed/decant period always existed. η1max was only relative to volumetric exchange ratio and irrespective of feed ρ (C)/ρ (N) ratio. When the carbon sources of influent were sufficient, the bigger the volumetric exchange ratio, the lower η1max was. When at the same feed ρ (C)/ρ (N) ratio, the bigger the volumetric exchange ratio, the higher TN removal efficiency was. TN removal during feed/decant period contributed more to UniFed SBR process, so the use of smaller volumetric exchange ratio was beneficial to TN removal of the whole process.
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Journal of Beijing University of Technology
ISSN： 0254-0037
Year： 2009
Issue： 3
Volume： 35
Page： 378-384
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ESI Highly Cited Papers on the List： 0 Unfold All
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30 Days PV： 0
