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Treatment of cutting-oily wastewater by electrocoagulation-flotation (ECF) process: Modeling approach

  • Received : 2015.08.01
  • Accepted : 2015.10.19
  • Published : 2015.12.31

Abstract

This work aims to investigate the oily wastewater treatment by the electrocoagulation-flotation (ECF) and propose a mathematical model for the efficiency prediction. Cutting oil was used to prepare the synthetic oily wastewater with submicron droplet sizes. The chemical coagulation by aluminium sulfate was firstly tested following by the electrocoagulation-flotation with aluminium electrodes. Both processes gave the effective treatment performance with the efficiencies higher than 90%. However, the ECF consumed less aluminium dosage as well as produced less sludge, which were its advantage on the chemical coagulation. The performance of the ECF was found to be affected by the current density, oil concentration, and reaction time according to the analysis by the design of experiment (DOE). Finally, the prediction model was proposed by two approaches, including linear and logarithm function. The latter model gave more accuracy prediction results in terms of treatment efficiency and duration in the lag and stable stages.

Keywords

References

  1. Boothroyd G, Knight WA. Cutting fluids and surface roughness. In: Fundamentals of machining and machine tools. 3rd ed. Boca Raton: Taylor and Francis; 2006. p. 155-74.
  2. Bataller H, Lamaallam S, Lachaise J, Graciaa A, Dicharry C. Cutting fluid emulsions produced by dilution of a cutting fluid concentrate containing a cationic/nonionic surfactant mixture. J. Mater. Process. Tech. 2004;152:215-20. https://doi.org/10.1016/j.jmatprotec.2004.03.027
  3. Yu L, Han M, He F. A review of treating oily wastewater. Arab. J. Chem. 2013; In press.
  4. Holt PK, Barton GW, Mitchell CA. The future for electrocoagulation as a localised water treatment technology. Chemosphere 2005;59:355-67 https://doi.org/10.1016/j.chemosphere.2004.10.023
  5. Tir M, Moulai-Mostefa N. Optimization of oil removal from oily wastewater by electrocoagulation using response surface method. J. Hazard. Mat. 2008;158:107-115. https://doi.org/10.1016/j.jhazmat.2008.01.051
  6. Xu X, Zhu X. Treatment of refectory oily wastewater by electro-coagulation process. Chemosphere 2004;56:889-894. https://doi.org/10.1016/j.chemosphere.2004.05.003
  7. Panizza M. Importance of electrode material in the electrochemical treatment of wastewater containing organic pollutants. In: Comninellis C, Chen G, eds. Electrochemistry for the environment. New York: Springer; 2010. p. 25-54.
  8. Aygun A, Yilmaz T. Improvement of coagulation-flocculation process for treatment of detergent wastewaters using coagulant aids. Int. J. Chem. Env. Eng. 2010;1:97-101.
  9. Kim BR, Zemal JF, Anderson SG, Stroup DP, Rai DN. Anarerobic removal of COD in metal-cutting-fluid wastewater. Water Environ. Res. 1992;64:216-22. https://doi.org/10.2175/WER.64.3.5
  10. Schreyer HB, Coughlin RW. Effects of stratification in a fluidized bed bioreactor during treatment of metal-working wastewater. Biotechnol. Bioeng. 1999;63:129-40. https://doi.org/10.1002/(SICI)1097-0290(19990420)63:2<129::AID-BIT1>3.0.CO;2-O
  11. Duan J, Gregory J. Coagulation by hydrolysing metal salts. Adv. Colloid. Interfac. 2003;100:475-502.
  12. Kobya M, Can OT, Bayramoglu M. Treatment of textile wastewaters by electrocoagulation using iron and aluminum electrodes. J. Hazard. Mater. 2003;100:163-78. https://doi.org/10.1016/S0304-3894(03)00102-X
  13. Holt PK, Barton GW, Wark M, Mitchell CA. A quantitative comparison between chemical dosing and electrocoagulation. Colloids Surf. 2002;211:233-248. https://doi.org/10.1016/S0927-7757(02)00285-6
  14. Nagai N, Takeuchi M, Kimura T, Oka T. Existence of optimum space between electrodes on hydrogen production by water electrolysis. Int. J. Hydrogen. Energ. 2003;21:35-41.
  15. Hu G, Li J, Zeng G. Recent development in the treatment of oily sludge from petroleum industry: A review. J. Hazard. Mat. 2013;261:470-490. https://doi.org/10.1016/j.jhazmat.2013.07.069
  16. Shin HS, Lee JK. Performance evaluation of electrocoagulation and electrodewatering system for reduction of water content in sewage sludge. Korean J. Chem. Eng. 2006;23:188-193. https://doi.org/10.1007/BF02705714
  17. Hu L, Bentler PM. Cutoff criteria for fit indexes in covariance structure analysis: conventional criteria versus new alternatives. Struct. Equ. Modeling 1999;6:1-55. https://doi.org/10.1080/10705519909540118

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