How Does an Oil Coalescing Separator Work?

The M.W. Watermark™ Oil Coalescing Separator is designed to remove free non-emulsified oils, diesel, gasoline and fuels from a waste stream, resulting in an effluent quality of 10 mg/l or less of contaminants 20 microns and larger.

M.W. Watermark Oil Coalescing Separator

The Oil Coalescing Separator operation is based on closely spaced oil attracting media that promotes the impact and formation of larger oil particles. As the oil droplets increase in size their rise rate to the water surface also increases.

The influent water enters the separator through an inlet baffle that directs the water through the media bundle. The media expands the surface area of the separator giving the oil more room on which to combine.

As the oil droplets accumulate on the media and coalesce they develop into larger droplets that flow up the surface of the media, detach and rise to the water surface. Surface oil decants by gravity into a segregated oil reservoir where it can be removed from the tank.

Heavier solids will slide down the surface of the media into the sludge chamber at the bottom of the tank for periodic removal. Virtually oil free water travels under an oil reservoir baffle, over an adjustable weir and into a clean water effluent chamber. The water is then gravity discharged from this chamber.

M.W. Watermark Offers 19 progressive sizes of Oil Coalescing Separator models

Our OCS models range from 10 gpm to 5,000 gpm.

Watch an overview video on our OCS webpage.

M.W. Watermark Oil Coalescing Separator (OCS) Video

All of our high-quality Oil Coalescing Separator models are assembled in the U.S.A.

Contact M.W. Watermark to learn more or request a quote.

About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

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How Does an Oil Coalescing Separator Work?