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Contrast of VFA Driven and Inorganic Acid/Base Driven pH Changes Impacting Phosphorus Transformations in EBPR

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Abstract:

Addition of acid resulted in high anaerobic phosphorus (P) releases both with or without the presence of volatile fatty acids (VFAs) for an EBPR biomass. There was also a subsequent increase in aerobic P release but such that there was a lower net P removals. NaOH addition reduced both anaerobic P release and aerobic P uptakes both with and without the presence of VFAs but did not improve net P removals. PHA quantity and type was virtually unaffected by pH in all the experiments and was a function of the VFA type received. Glycogen metabolism did not show entirely consistent trends but in the presence of VFAs acid pHs generally resulted in less glycogen biosynthesis. If VFAs were not present both acid and base addition slightly increased glycogen biosynthesis.

Keywords: Phosphorus; Propionic acid; Volatile Fatty Acids (VFAs); Wastewater; pH

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864710798207413

Publication date: January 1, 2010

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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 These proceedings are not peer reviewed.

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