Optimization of Opuntia Dose as Bio-flocculant for Oil Refinery Wastewater Using Response Surface Methodology
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Oil refinery wastewater is one of the most polluted types of wastewater with a large variety of organic and mineral pollutants, which need treatment before discharge to the receiving environment. The coagulation–flocculation process was used to treat oil refinery wastewater with ferric chloride (FeCl3-40%) as a coagulant and cactus juice was used as a flocculant to reduce turbidity and chemical oxygen demand (COD).
A response surface methodology (RSM) design was applied to optimize the process the three factors coagulant, bio-flocculant doses, and pH. Obtained optimal dosages were: 1.12 g/l of coagulant and 11.6 ml/l of bio-flocculant and 9.38 of pH. Removal efficiencies under optimal conditions reached: 97.92 ± 0.66% and 62.41 ± 8.12% for turbidity and COD, respectively. The experiment results showed the capability of ferric chloride as coagulant and cactus as bio-flocculant for reducing the pollutants from oil refinery wastewater.
KeywordsOil refinery wastewater Response surface methodology Bio-flocculant Coagulation-flocculation Factorial design
- 1.National Environmental Standard and Regulatory Enforcement Agency Federtal Republic of Nigeria Official Gazette, Lagos (2011)Google Scholar
- 2.Chatoui, M., Lahsaini, S., Souabi, S., Bahlaoui, M.A., Hobaizi, S., Pala, A.: Study of refining wastewater pollution: case of vegetable oil refining industry Morocco. J. Mater. Environ. Sci. 7(10), 3906–3915 (2016)Google Scholar
- 3.Patale, V., Pandya, J.: Mucilage extract of Coccinia indica fruit as coagulant-flocculent for turbid water treatment. Asian J. Plant Sci. Res. 2, 442–445 (2012)Google Scholar
- 6.Vijayaraghavan, G., Sivakumar, T., Vimal Kumar, A.: Application of plant based coagulants for waste water treatment. Int. J. Adv. Eng. Res. Stud. 1, 88–92 (2011). E-ISSN2249-8974Google Scholar
- 8.APHA, WPCE, AWWA. Standard methods for the examination of water and wastewater, 19th edn. American Public Health Association (APHA), Washington, DC (1992)Google Scholar
- 9.Goupy, J., Creighton, L.: Introduction aux plans d’expériences. Edition Dunod, Paris (2006)Google Scholar
- 12.Oubrayme, H., Souabi, S., Bouhria, M., Tahiri, M., Alami younssi, S., Albizane, A.: Optimization of the coagulation/flocculation of wastewater from oil refineries use of Response Surface Methodology. J. Mater. Environ. Sci. 7(11), 4299–4310 (2016)Google Scholar