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While the mechanism of biological phosphorus removal and the need for VFA have been well researched and documented to the point where it is now possible to design a plant with a very reliable phosphorus removal process using formal flow sheets, biological phosphorus removal is still
observed in a number of plants that have no designated anaerobic zone, which was once considered essential for phosphorus removal. Some examples are given in this paper. Mostly mixed liquor or return sludge is fermented, whether in separate vessels or on the floor of the main basins. This
paper will discuss some of the background, and some case histories and applications, and will present a simple postulation as to the mechanism and efforts at modeling the results.
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 These proceedings are not peer reviewed. WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.