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Effect of fermented wastes on denitrification in activated sludge

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Abstract:

Fermented organic wastes were investigated as electron donors for denitrification in activated sludge. Fermentation of primary domestic wastewater sludge improved denitrification rates in nonacclimated activated sludge, whereas fermentation of wastewater had no effect. In both acclimated and nonacclimated activated sludges, higher denitrification rates were obtained with fermented sludges (from domestic wastewater or swine waste) than with either methanol or acetate. Methanol was equivalent to acetate as electron donor for denitrification in acclimated sludges but supported lower denitrification rates than acetate in nonacclimated sludges. Mixing and pH were important determinants of volatile fatty acid yields from organic wastes, whereas temperature in the range of 28°C to 35°C had little influence.

Keywords: DENITRIFICATION; ELECTRON DONORS; FERMENTATION; ORGANIC WASTE; SLUDGE

Document Type: Research Article

DOI: https://doi.org/10.2175/106143095X133383

Publication date: 1995-11-01

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    Water Environment Research� (WER�) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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