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Conventional wastewater treatment operations are dependent on the settleability of biosolid flocculates. Past research has shown that biosolid flocculate settleability is dependent on the monovalent to divalent cation ratio (M/D ratio). Natural and synthetic estrogens found in wastewater
are primarily removed from the wastewater by sorption into biosolids. This research study focused on the potential effect of the M/D ratio and cationic strength on sorption of estrogenic compounds. The sodium azide isotherm results indicate that the sorption capacity parameter is strongly
affected by the M/D ratio and supports the hypothesis that an increase in M/D ratio decreased sorption capacity. However, isotherms performed on live biosolids did not show a clear pattern that supports the hypothesis that the M/D ratio effects sorption capacity. This may be due
to the production of colloids by living biosolids or by competitive sorption by other compounds.
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 These proceedings are not peer reviewed.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.