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Determination of the Range of Anoxic Half Saturation Coefficients for Methanol

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Efficient use of methanol to improve denitrification depends primarily on reducing the amount that is inevitably lost (bled) from anoxic reactors. At low concentrations the rate of methanol use by methylotrophic bacteria slows down. This results in costly overdose and process pollution issues. The methanol utilization rates under these conditions primarily depend on the Monod half-saturation concentration (KS). A method was developed to measure low methanol concentrations in laboratory scale anoxic batch reactors. Detailed gas-chromatographic (GC) measurements show that in this series the methanol KS varied over a range from 0.13 to 2.35 mg COD/L. This information can be used to design and operate plants that handle methanol dosing in an optimal way.

Keywords: Denitrification; Ks; gas chromatography; half saturation coefficient; methanol; methylotrophs

Document Type: Research Article


Publication date: January 1, 2011

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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 These proceedings are not peer reviewed.

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