Title: Shock load response in an SBR-activated sludge process treating high load wastewater

Authors: Ezio Ranieri, Vito Goffredo, E.D. Schroeder

Addresses: Engineering Faculty of Taranto, Department of Environmental Engineering and Sustainable Development, Technical University of Bari, Viale del Turismo, 8 (Q.re Paolo VI), 74100 Taranto, Italy. ' Engineering Faculty of Taranto, Department of Environmental Engineering and Sustainable Development, Technical University of Bari, Viale del Turismo, 8 (Q.re Paolo VI), 74100 Taranto, Italy. ' Department of Civil and Environmental Engineering, University of California at Davis, One Shields Avenue Davis, CA 95616-8562, USA

Abstract: In this study, the production of storage polymers is made when cheese production wastewater is treated. Cheese plants typically produce high-strength wastewaters on an intermittent basis and are particularly suitable for treatment in Sequencing Batch Reactor (SBR) systems. The SBRs were operated in triplicate under two filling scenarios: |React Fill| (RF) with mixing/aeration; |Static Fill| (SF) with no mixing/aeration. The results suggest that an |SF| approach outperforms an |RF| with respect to storage products production (50% more PHB, 15% more glycogen). Additionally, the famine phase duration will vary depending on wastewater strength, suggesting optimisation per waste stream.

Keywords: cheese wastewater; feast–famine; SBR; sequencing batch reactors; PHB; polyhydroxybutyrate; glycogen; shock load response; activated sludge; wastewater treatment; storage polymers.

DOI: 10.1504/IJEE.2011.039452

International Journal of Environmental Engineering, 2011 Vol.3 No.2, pp.164 - 174

Published online: 25 Apr 2015 *

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