Combined ozone-activated sludge treatment of landfill leachate

Biological treatment is widely preferred by many landfill owners to remove the bulk of the pollutants in leachate. Specific problems due to toxicity and nutrient deficiencies are however frequently reported. This study investigates the possibility of pre-treating leachate to decrease its toxicity an...

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Bibliographic Details
Published in:	Water Science & Technology Vol. 44; no. 2-3; pp. 359 - 365
Main Authors:	GEENENS, D, BIXIO, B, THOEYE, C
Format:	Conference Proceeding Journal Article
Language:	English
Published:	London IWA 01-01-2001 IWA Publishing
Subjects:	Activated sludge Applied sciences Biodegradability Biodegradation Biodegradation, Environmental Biological and medical sciences Biological treatment Biological treatment of waters Biotechnology Environment and pollution Exact sciences and technology Fundamental and applied biological sciences. Psychology Industrial applications and implications. Economical aspects Landfill Landfills Leachates Mineral nutrients Municipal wastes Municipal wastewater Nitrification Nitrogen - metabolism Operating costs Other wastewaters Oxidants, Photochemical - chemistry Oxygen - metabolism Ozonation Ozone Ozone - chemistry Ozonization Pollutants Pollution Pretreatment Refuse Disposal Sewage Sewage - chemistry Sewage treatment Sludge Sludge treatment Soil Pollutants - metabolism Toxicity Waste disposal sites Wastewater treatment Wastewaters Water Pollutants - metabolism Water pollution treatment Water treatment and pollution Activated sludge Ozonization Sanitary landfill Waste dumping Physicochemical purification Oxidation Waste water purification Experimental study Leachate Biological purification
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Summary:	Biological treatment is widely preferred by many landfill owners to remove the bulk of the pollutants in leachate. Specific problems due to toxicity and nutrient deficiencies are however frequently reported. This study investigates the possibility of pre-treating leachate to decrease its toxicity and increase its biodegradability, using ozonation. Lab-scale and pilot testing has shown that nitrification toxicity was minimised by ozone pre-treatment. A decrease of the COD/BOD-ratio from 16 to 6 was achieved, making the pre-treated leachate co-treatable in municipal sewage treatment. The operational cost for the pre-treatment was estimated at 1.34 Euro/kg COD.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 SourceType-Books-1 ObjectType-Book-1 content type line 25 ObjectType-Conference-2 SourceType-Conference Papers & Proceedings-2 SourceType-Scholarly Journals-2 ObjectType-Feature-2 ObjectType-Conference Paper-1 SourceType-Conference Papers & Proceedings-1 ObjectType-Article-3
ISBN:	190022299X 9781900222990
ISSN:	0273-1223 1996-9732
DOI:	10.2166/wst.2001.0790