Energy efficient—Advanced oxidation process for treatment of cyanide containing automobile industry wastewater

Destruction of cyanide (CN) from an automobile industry wastewater by advance oxidation process (AOP) has been evaluated. The operating conditions (in an indigenously designed photoreactor) for three different treatment strategies have been optimized. The treatment strategies involved use of, ultra...

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Bibliographic Details
Published in:Journal of hazardous materials 2009-05, Vol.164 (2), p.1474-1479
Main Authors: Mudliar, R., Umare, S.S., Ramteke, D.S., Wate, S.R.
Format: Article
Language:English
Subjects:
Applied sciences
Automobile industry wastewater
Automobiles
Catalysis
Catalytic reactions
Chemical engineering
Chemistry
Cyanide
Cyanides - chemistry
Exact sciences and technology
General and physical chemistry
General purification processes
Hydrogen Peroxide
Industrial Waste - prevention & control
Oxidation-Reduction
Ozone
Photochemical Processes
Photoreactor
Pollution
Reactors
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Ultraviolet Rays
Waste Disposal, Fluid - methods
Wastewaters
Water Pollutants - isolation & purification
Water treatment and pollution
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Summary:Destruction of cyanide (CN) from an automobile industry wastewater by advance oxidation process (AOP) has been evaluated. The operating conditions (in an indigenously designed photoreactor) for three different treatment strategies have been optimized. The treatment strategies involved use of, ultra violet light (UV), hydrogen peroxide (H 2O 2) and ozone (O 3) in various combinations. Treatment of automobile industry wastewater (250 mg/L CN) showed fastest CN destruction, which was significantly ( P < 0.05) faster than that observed with synthetic wastewater (with similar CN concentration). A combined application of H 2O 2/O 3 was found to be the best option for maximum CN destruction. This treatment allows CN to reach the regional/international limit (of 0.02 mg/L) for safe industrial wastewater discharges to the receiving water bodies. The specific energy consumption by the photoreactor following this treatment was comparable to that obtained by conventional treatments, which use photocatalyst. Since the present treatment does not use catalyst, it provides an excellent energy efficient and economical option for treatment and safe disposal of CN containing industrial wastewater.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2008.09.118