|Projects||In-situ innovative UV enhanced produced water treatment|
Description: There are growing concerns on the discharges and adverse effects of produced water on the marine environment. Currently, the major produced water treatment and disposal methods include on-site treatment, ship to shore and dispose, or re-injection in abandoned wells or subsurface caverns. Nevertheless, the on-site treatment is much attractive and desired due to its low shipping/handling cost. However, there currently are few widely recognized on-site treatment technologies available for the platforms and many shortcomings hinder the application of the existing ones in practice. From the perspectives of both industry and government, there is an urgent need to address and overcome the shortcomings of existing methods and develop more robust and efficient in-situ remediation technologies for treating produced water. Ultraviolet (UV) treatment is commonly used in large-scale water and wastewater treatment plants because of its efficiency in destroying dissolved, volatile and non-volatile organic compounds as well as organic biocides without generating additional waste streams.
|Produced water treatment||
The UV equipment is reasonably compact and fairly robust. It is a relatively safe method since no chemicals are involved and there are no known taints or harmful by-products generated and can handle upset or high-loading conditions. However, the existing UV treatment methods cannot be directly used for handling produced water due to the special characteristics of produced water such as high content of hydrocarbons, chemical additives and salinity. Few studies have been reported on UV application to treating offshore produced water and feasibility for on-site treatment of produced water on platforms. This research aims at developing an in-situ innovative UV enhanced wastewater treatment method for treating produced water to help offshore oil and gas industries improve their existing treatment capacity and reduce time and cost. This research will employ UV irradiation with ozone and photocatalysts under an optimized condition to facilitate the removal of both chemical and organic contaminants in produced water. A bench-scale reactor composed of screw-capped quartz glass cell, mounted UV lamps, input and output channel, churn-dashers and sampling ports is used to test the developed method. The design of experiment (DOE) methodology will be employed to help determine optimum operating conditions and minimize the cost and duration of the experiment.
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