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Efficiency of Air Flotation Process in Removal of Oil and Grease from Steel Mill Wastewater

Authors

1 Tehran University of Medical Sciences, School of Public Health, Department of Environmental Health Engineering, Tehran, I.R.Iran

2 Professor, Tehran University of Medical Sciences, School of Public Health, Department of Environmental Health Engineering, Tehran, I.R.Iran.

3 Assistant Professor, Tehran University of Medical Sciences, School of Public Health, Department of Environmental Health Engineering, Tehran, I.R.Iran.

Abstract

Background and objective: Oil and grease causes damages for aquatic organisms, soil ecosystem, and mutagenic and carcinogenic for human. The aim of this research was to study the reduction of pollution of oil and grease of steel mill wastewater with Air Flotation system.

Materials and Method: At first phase of this examination the sampling performed of raw wastewater for determine amount of oil and grease, COD, TS, TDS, TSS, Turbidity and Alkalinity. The second phase flotation with dispersed air performed at pilot vessel and the second sampling performed for determination
of removal efficiency of oil and grease in 3 different concentration and 4 different retention time and measured for other parameters in best concentration and retention time.

Results: The retention time were selected 30, 45, 60 and 90 min and concentrations were 591 mg/l, 386 mg/l and 277 mg/l. removal efficiency for parameters of oil and grease, COD, TS, TDS, TSS, Turbidity, Alkalinity, obtained %48, %46, %37, %36, %82, %89, %6.

Conclusion: This study showed with increases of retention time from 30minute to 90minute removal efficiency for all of parameters gently increased but between 60 and 90 minute retention time removal efficiency was almost stable. Removal efficiency in high concentration of oil and grease(591mg/l) was more than removal efficiency in low concentration of oil and grease (277mg/l).

Paper type: Research article

Keywords

References
1. pisut painmanakorn, k.k., nattawin chawaloesphonsiya, treatment of oily wastewater by   fibrous coalescer process:stage coalescer and model prediction. world academy of science,engineering and technology 58, 2009.
2. Rubio, J., M.L. Souza, and R.W. Smith, Overview of flotation as a wastewater treatment technique. Minerals Engineering, 2002. 15(3): p. 139-155.
3.  Keramati.H, A.H., Parvaresh. A.R,Movahedian.H,Mahvi.A.H, Survey of Dissolved Air flotation System Efficiency for Reduce of Pollution of Vegtable oil Industry Wastewater. Pakistan Jornal of Biological Sciences, 2008. 11(19): p. 2364-2366.
4.  Albijanic, B., et al., A review of induction and attachment times of wetting thin films between air bubbles and particles and its relevance in the separation of particles by flotation. Advances in Colloid and Interface Science, 2010. 159(1): p. 1-21.
5. Scholz, M., Flotation systems, in Wetland Systems to Control Urban Runoff (First Edition). 2006, Elsevier: Amsterdam. p. 59-63.
6.   Ramaswamy, B., D.D. Kar, and S. De, A study on recovery of oil from sludge containing oil using froth flotation. Journal of Environmental Management, 2007. 85(1): p. 150-154.
7.  Abid Baig.M, M.M., Zaraf I,Baig.Bhatti and MA, Removal of oil and grease from Industrial  effluents. Electronic jornal of environmental,Agricultural and food Chemistry.
8. yagoob D.optimization of oil and grease removal procedures from Iran khodro mill wastewater.Tehran university of medical science,1370.
9. Zlokarnik, M., Separation of activated sludge from purified waste water by induced air
 
 
Journal of Research in Environmental Health
Volume 1, Issue 2 - Serial Number 2
September 2015
Pages 104-111
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