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DEVELOPMENT OF AN ELECTROCHEMICAL OXIDATION PROCESS FOR THE TREATMENT OF LANDFILL LEACHATES
Author(s) -
KAUR K.,
CHURCHLEY J.,
KANDHOLA N. J.
Publication year - 2005
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/j.1747-6593.2005.tb00577.x
Subject(s) - leachate , effluent , chemical oxygen demand , wastewater , environmental science , sewage treatment , ammonia , waste management , environmental engineering , environmental chemistry , chemistry , engineering , organic chemistry
Some landfill site operators use wastewater treatment plants for the discharge of complex leachate waste. However, for the water company involved in managing the wastewater plant, leachates can pose a problem to the quality of the effluent, due to the high levels of Chemical Oxygen Demand (COD), ammonia and inorganic metal constituents. Electrochemical oxidation of landfill leachate has been successfully used by researchers (1,2,3,4) with current densities of 5 to 100 mA/cm 2 . A new laboratory system has been developed which utilises a low current density of 2.42 mA/cm 2 and the performance has been evaluated with synthetic and ’real’ landfill leachates from 2 wastewater sites. This system reduces COD of synthetic mixtures by 58%, with complete removal of ammonia. For real leachates, 5 out of 8 samples resulted in ammonia reduction, with 2 samples experiencing approximately. 60% COD reduction. Power costs for treatment have been determined and the potential for a full‐scale installation considered.