Joint research between Sultan Qaboos University, Oman, and Petroleum Energy Center, Japan; sought to develop and establish a process whereby the large quantities of produced water from Omani oil fields can be effectively treated and utilized for irrigation. During pilot plant operation, oil contamination ranging from 50-300 ppm, was reduced to below 0.5 ppm. Irrigation with treated water showed no significant detrimental effects on the growth of three different salt tolerant species of plants.

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