IngentaConnect Modification of a Full-Scale Sequencing Batch Reactor Operational...

Authors: Ersu, Cagatayhan; Arslankaya, Ertan; Ong, Say Kee; Fox, David; Aldrich, Lance; Copeman, James

Source: Water Environment Research, Volume 80, Number 3, March 2008 , pp. 257-266(10)

Publisher: Water Environment Federation

Abstract:

Two biological nutrient removal modes, consisting of anaerobic, anoxic, and oxic sequences, were tested in a full-scale sequencing batch reactor. The modes, identified as BNR-S1 and BNR-S2, had average total nitrogen removals of 84 and 89%, respectively, for the months of August to October. Over the same period, total phosphorus removals for BNR-S1 and BNR-S2 were 88 and 87%, respectively. In contrast, total nitrogen and total phosphorus removals for the regular aerobic mode were 54.7 and 44.7%, respectively. When the wastewater temperature changed from approximately 20 to 15°C in the winter months, total nitrogen and total phosphorus removals for BNR-S2 were reduced to 81 and 70%, respectively. Total nitrogen effluent concentrations were between 2.5 and 4 mg-N/L (at approximately 20°C), while the effluent total phosphorus concentrations were between 1 and 2 mg/L. The BNR-S2 mode was found to require less energy per kilogram of soluble chemical oxygen demand removed than the regular and BNR-S1 modes.

Keywords: nutrient; nitrogen; phosphorus; sequencing batch bioreactor; temperature

Document Type: Research article

DOI: 10.2175/106143007X221337

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Modification of a Full-Scale Sequencing Batch Reactor Operational Mode for Biological Nutrient Removal