Waterworld | By: Adrian Irimia & Georg Stockinger | GPE – November 12, 2017:
Following the success of a constructed wetland in Oman, treating more than 95,000 m3/day of produced water, petrochemical company Shell has reviewed the process to be used on other sites around the world. In this article the engineering team present the findings.
Constructed Wetlands (CW) or engineered wetlands are water and wastewater treatment technologies well established in runoff control, acid mine water treatment, septage waste, sewage treatment and other applications.
They can replace or augment conventional steel and concrete facilities (grey infrastructure), particularly in locations and climates where they offer clear advantages over the conventional approach.
In the Oil & Gas industry this technology has been also applied for a couple of decades in some services, depending on the type of feed water to be treated.
One example is the Petroleum Development Oman LLC, a joint venture with the Shell Petroleum Company and the Government of Oman, which owns the world’s largest commercial wetland covering more than 360 ha and treating more than 95,000 m3/day of produced water.
Constructed wetlands have been approved to be treated on par with the more conventional water and wastewater treatment technologies applied in Shell. CWs are now seen as technical systems (in the form of managed ecosystem) that are considered along all the other water treatment processes for new projects or debottlenecking activities. The use of CW in some services (e.g. produced water similar in quality to Nimr, domestic sewage treatment) is adopted as a proven technology.
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