Treatment of industrial wastewater contaminated with recalcitrant metal working fluids by the photo-Fenton process as post-treatment for DAF

(2017) Treatment of industrial wastewater contaminated with recalcitrant metal working fluids by the photo-Fenton process as post-treatment for DAF. Journal of Industrial and Engineering Chemistry. pp. 412-420. ISSN 1226-086X

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Abstract

Post-treatment of the industrial wastewater polluted by metalworking fluids (MWFs) was performed using the photo-Fenton process in following of the chemical addition-dissolved air flotation (CA-DAF) unit. Prior to this study, the CA-DAF was operated as full-scale by trial and error. For the photo-Fenton process as a pilot-scale batch reactor, initial pH value, FeSO4, and H2O2 concentrations were considered to study the effect of different operating conditions on chemical oxygen demand (COD) and total petroleum hydrocarbon (TPH) removals. This hybrid approach revealed removal efficiencies of 99.85 and 98.9 for COD and TPH in the optimized photo-Fenton process as pH 3, FeSO4: 100 mg/I, and H2O2: 17.8 The COD degradation results for the photo-Fenton system indicated that it could be well fit using a pseudo first order kinetic model. By the GC-MS analysis of DAF and applied photo-Fenton effluents, a 73 removal rate of mono(2-ethylhexyl) phthalate was detected. It is likely favorable to increase the biodegradability. The cost analysis of this process for the consumed energy (6 kWh) and chemicals (0.01818 kg FeSO4 and 17.15 kg H2O2) was estimated at approximately 26 per 1 m(3) of DAF effluent. Generally, these results imply that the CA-DAF unit followed by photo-Fenton is an effective and practical method for treating MWFs wastewater. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

Item Type: Article
Keywords: industrial wastewater metal working fluids (mwfs) photo-fenton daf advanced oxidation processes spent metalworking fluids biological process air flotation coagulation wastewaters biodegradation optimization purification technologies
Divisions: Faculty of Health > Department of Environmental Health Engineering
Faculty of Health > Student Research Committee
Research Institute for Primordial Prevention of Non-communicable Disease
Page Range: pp. 412-420
Journal or Publication Title: Journal of Industrial and Engineering Chemistry
Journal Index: ISI
Volume: 45
Identification Number: https://doi.org/10.1016/j.jiec.2016.10.010
ISSN: 1226-086X
Depositing User: مهندس مهدی شریفی
URI: http://eprints.mui.ac.ir/id/eprint/820

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