IFAS Optimizes Use of Existing Infrastructure and Upgrades Performance

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Small footprint technologies, such as the integrated fixed film activated sludge (IFAS) process, provide unique solutions for biological nutrient removal (BNR) facilities that face site constraints, expansion challenges, and/or the desire for a high quality effluent. The Yucaipa Valley Water District (YVWD) selected IFAS to expand the Henry N. Wochholz wastewater treatment plant (WWTP) capacity from 15140 m3/d (4 mgd) to 30280 m3/d (8 mgd) and to meet a total inorganic nitrogen (TIN) permit limit of 6 mg/L based on a 12-month average. The paper will discuss startup challenges with respect to the IFAS basins loading, media, aeration control as well as foaming issues. It will also provide information on current plant performance and operations.

Keywords: IFAS; TIN; fixed-film; nitrogen reduction; small footprint

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864709793954079

Publication date: January 1, 2009

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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