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Conference papers

Combined ozone pretreatment and anaerobic digestion for the reduction of biological sludge production in wastewater treatment

Abstract : The ever-increasing amount of solid waste generated by wastewater treatment plants highlights emerging economic and environmental issues. In order to develop new processes producing less sludge, the use of ozone combined with anaerobic digestion was investigated for waste activated sludge treatment. This paper was aimed at evaluating the impact of ozone pretreatment on anaerobic digestion and particularly the enhancement of biogas production. Sludge solubilization was estimated in terms of modification of chemical oxygen demand, solids and nitrogen. Batch anaerobic digestion highlighted the enhancement of ozonated sludge biodegradability. Ozonation led to an increase in biogas production. The ozone dose of 0.15 g O-3/g total solids resulted in a considerable increase in the soluble COD ratio from 4% to 37%. This ozone dose achieved the highest increase in biogas production: 2.4 times greater than without chemical pretreatment.
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Submitted on : Saturday, June 6, 2020 - 10:46:20 PM
Last modification on : Wednesday, March 23, 2022 - 12:08:21 PM

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Claire Bougrier, Audrey Battimelli, Jean Philippe Delgenes, Hélène Carrère. Combined ozone pretreatment and anaerobic digestion for the reduction of biological sludge production in wastewater treatment. 17. International Ozone Association Congress, Aug 2005, Strasbourg, France. ⟨10.1080/01919510701296754⟩. ⟨hal-02824593⟩

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