Enhancing denitrification using a carbon supplement generated from the wet oxidation of waste activated sludge
Autor: | P. J. Strong, Daniel J. Gapes, Ben McDonald |
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Rok vydání: | 2011 |
Předmět: |
Environmental Engineering
Denitrification Inorganic chemistry Biomass Bioengineering Waste Disposal Fluid Water Purification Acetic acid chemistry.chemical_compound Bioreactors Wet oxidation Waste Management and Disposal Bacteria Sewage Renewable Energy Sustainability and the Environment Temperature Water food and beverages General Medicine Hydrogen-Ion Concentration equipment and supplies Pulp and paper industry Carbon Waste treatment Biodegradation Environmental Activated sludge chemistry Sewage treatment Oxidation-Reduction Sludge |
Zdroj: | Bioresource Technology. 102:5533-5540 |
ISSN: | 0960-8524 |
Popis: | This study compared the effect of four pure carbon supplements on biological denitrification to a liquor derived as a by-product from the wet oxidation (WO) of waste activated sludge. Sequencing batch reactors were used to acclimate sludge biomass, which was used in batch assays. Acetate, WO liquor and ethanol-supplementation generated the fastest denitrification rates. Acetate and WO liquor were efficiently utilised by all acclimated biomass types, while poor rates were achieved with methanol and formate. When comparing an inoculum from an ethanol-supplemented and non-supplemented wastewater treatment plant (WWTP), the ethanol-acclimated sludge obtained superior denitrification rates when supplemented with ethanol. Similarly high nitrate removal rates were achieved with both sludge types with acetate and WO liquor supplementation, indicating that WO liquors could achieve excellent rates of nitrate removal. The performance of the WO liquor was attributed to the variety of organic carbon substrates (particularly acetic acid) present within the liquor. |
Databáze: | OpenAIRE |
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