Reverse osmosis performance on stripped phenolic sour water treatment - A study on the effect of oil and grease and osmotic pressure

Journal of Environmental Management
Pedro D A BastosJoão G Crespo

Abstract

Technologies for water recycling within oil refineries have been gaining interest at an extensive rate due to the large volume of wastewater generated, high dependency of water and the progressive scarcity of this valuable resource. Phenols are part of a specific class of organic pollutants that have been contributing to a low-quality effluent in oil refineries due to their hazardous nature and strict environmental legislation associated. The reuse of stripped sour water within refineries is often blocked due to its rich phenolic content. This study evaluates the retention of phenols in refinery wastewater through reverse osmosis (RO) at its major source of emission, for water reclamation. The RO membrane selected exhibited rejections of up to 98% of phenols and 99% of both chemical oxygen demand (COD) and total organic carbon (TOC). Permeate quality remained intact despite flux decline caused by phenolic and hydrocarbon adsorption when the oil content, in the feed, reached 771 ppm. The effluent's low conductivity due to lack of salts led to minor osmotic pressure differences (less than 2.5 bar at a volume concentration factor of 3), therefore, showing appealing performances of reverse osmosis filtration. Characterization of al...Continue Reading

References

Apr 7, 2005·Journal of Hazardous Materials·Bassam Mrayyan, Mohammed N Battikhi
Jul 25, 2006·Journal of Hazardous Materials·Mohamed Al Zarooni, Walid Elshorbagy
Jun 26, 2013·Water Environment Research : a Research Publication of the Water Environment Federation·Ramesh Kumar, Parimal Pal
Jul 23, 2016·Journal of Environmental Management·Bruno SantosSvetlozar Velizarov

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Citations

Aug 7, 2021·Environmental Science and Pollution Research International·Pedro D A BastosJoão G Crespo

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