Ozonation of membrane bioreactor effluent for landfill leachate treatment. 2005

A Chaturapruek, and C Visvanathan, and K H Ahn
Environmental Engineering and Management Program, School of Environment, Resources and Development, Asian Institute of Technology, PO Box 4, Klong Luang, Pathumthani, 12120, Thailand.

Ozonation of leachate effluent obtained from a Membrane Bioreactor (MBR) process treating a medium-aged landfill leachate was investigated. The sequence of ammonia stripping, membrane bioreactor, and ozonation was used in the experiment. Ozonation of the MBR effluent showed reduction in Chemical Oxygen Demand (COD) and Total Organic Carbon (TOC) with an increase in five days Biochemical Oxygen Demand (BOD5) concentration. About 73% of COD could be removed at an ozone (O3) dosage of 4.2 mg O3 mg COD(-1). The biodegradability indicated by BOD5/COD ratio increased from 0.03 to 0.08 after ozonation at optimum ozone condition. While analyzing the molecular weight distribution, the fraction of molecular weight (MW) greater than 50 kDa of MBR effluent was transferred to MW 10-50 kDa (38%) at an ozone dosage of 810 mg O3. When O3 dosage was increased to 2,025 mg O3, a rapid change occurred in MW > 50 kDa fraction. This fraction was completely broken down into lower molecular weight fractions. This indicates partial degradation of landfill leachate by ozonation. The colour removal from the leachate was found to be greater than 95%. When the ozonated leachate was recirculated into the MBR system, along with an improvement in the performance of MBR, overall COD removal increased from 78% to 83%. Further, the ozone consumption decreased from 6.1 to 3.4 mg O3 mg COD(-1) removed, thus reducing the ozone requirement.

UI MeSH Term Description Entries
D008567 Membranes, Artificial Artificially produced membranes, such as semipermeable membranes used in artificial kidney dialysis (RENAL DIALYSIS), monomolecular and bimolecular membranes used as models to simulate biological CELL MEMBRANES. These membranes are also used in the process of GUIDED TISSUE REGENERATION. Artificial Membranes,Artificial Membrane,Membrane, Artificial
D010083 Oxidants, Photochemical Compounds that accept electrons in an oxidation-reduction reaction. The reaction is induced by or accelerated by exposure to electromagnetic radiation in the spectrum of visible or ultraviolet light. Photochemical Oxidants
D010126 Ozone The unstable triatomic form of oxygen, O3. It is a powerful oxidant that is produced for various chemical and industrial uses. Its production is also catalyzed in the ATMOSPHERE by ULTRAVIOLET RAY irradiation of oxygen or other ozone precursors such as VOLATILE ORGANIC COMPOUNDS and NITROGEN OXIDES. About 90% of the ozone in the atmosphere exists in the stratosphere (STRATOSPHERIC OZONE). Ground Level Ozone,Low Level Ozone,Tropospheric Ozone,Level Ozone, Ground,Level Ozone, Low,Ozone, Ground Level,Ozone, Low Level,Ozone, Tropospheric
D010539 Permeability Property of membranes and other structures to permit passage of light, heat, gases, liquids, metabolites, and mineral ions. Permeabilities
D012037 Refuse Disposal The discarding or destroying of garbage, sewage, or other waste matter or its transformation into something useful or innocuous. Waste Disposal, Solid,Disposal, Refuse,Disposal, Solid Waste,Disposals, Refuse,Disposals, Solid Waste,Refuse Disposals,Solid Waste Disposal,Solid Waste Disposals,Waste Disposals, Solid
D012989 Soil Pollutants Substances which pollute the soil. Use for soil pollutants in general or for which there is no specific heading. Soil Pollutant,Pollutant, Soil,Pollutants, Soil
D012995 Solubility The ability of a substance to be dissolved, i.e. to form a solution with another substance. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Solubilities
D014872 Water Movements The flow of water in enviromental bodies of water such as rivers, oceans, water supplies, aquariums, etc. It includes currents, tides, and waves. Movement, Water,Movements, Water,Water Movement
D014873 Water Pollutants Substances or organisms which pollute the water or bodies of water. Use for water pollutants in general or those for which there is no specific heading. Water Pollutant,Pollutant, Water,Pollutants, Water
D018508 Water Purification Any of several processes in which undesirable impurities in water are removed or neutralized; for example, chlorination, filtration, primary treatment, ion exchange, and distillation. It includes treatment of WASTEWATER to provide potable and hygienic water in a controlled or closed environment as well as provision of public drinking water supplies. Waste Water Purification,Waste Water Treatment,Wastewater Purification,Wastewater Treatment,Water Treatment,Purification, Waste Water,Purification, Wastewater,Purification, Water,Treatment, Waste Water,Treatment, Wastewater,Treatment, Water,Waste Water Purifications,Waste Water Treatments,Water Purification, Waste

Related Publications

A Chaturapruek, and C Visvanathan, and K H Ahn
January 2006, Journal of environmental sciences (China),
A Chaturapruek, and C Visvanathan, and K H Ahn
July 2016, Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering,
A Chaturapruek, and C Visvanathan, and K H Ahn
October 2013, Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA,
A Chaturapruek, and C Visvanathan, and K H Ahn
January 2021, Anais da Academia Brasileira de Ciencias,
A Chaturapruek, and C Visvanathan, and K H Ahn
December 2020, Journal of environmental health science & engineering,
A Chaturapruek, and C Visvanathan, and K H Ahn
November 2009, Journal of hazardous materials,
A Chaturapruek, and C Visvanathan, and K H Ahn
October 2010, Journal of hazardous materials,
A Chaturapruek, and C Visvanathan, and K H Ahn
February 2022, Bioprocess and biosystems engineering,
A Chaturapruek, and C Visvanathan, and K H Ahn
December 2016, Journal of environmental management,
A Chaturapruek, and C Visvanathan, and K H Ahn
January 2009, Water science and technology : a journal of the International Association on Water Pollution Research,
Copied contents to your clipboard!