Oil Separators

One of the key tasks of industries is managing environmental challenges related to oily contaminated industrial effluents. It is a common practice for industries to face restrictions on operations due to environmental management issues and regulations, which conveys into unforeseen time and financial impacts. Removal of oil from water is one of the important environmental goals.
EN 858-1 standard Coalescing Oil Water Separator of NWS-COS is designed to remove free / non-emulsified oils from effluent streams. It is an efficient solution for oily contaminated effluent with up to 2500 mg/l free oil, which results to outlet oil up to <5 mg/l.

The unit’s operation is based on Closely Packed media for Oil Water Separators 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 and flows through a tightly stacked bundle of Coalescing media. The media expands the surface area of the separator giving the oil more room on which to combine (coalesce). 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 (Solids having a specific gravity higher than water) 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. Then the water is being gravity discharged from this chamber.

Oil Collection Tank:

The separated oil drops rise and collect atop the separation chamber. As the oil layer increases, oil automatically decants over a fixed / adjustable weir into an isolated Oil Collection Tank. The Oil Collection Tank can be sized as per the storage needs.

Additional Components May Be Offered:

Control Panel
Pumping Sets
Oil and effluent Storage Tanks.
pH neutralization Special coating systems

Inlet Diffusion Chamber:

The raw influent enters the Oil Separator Package (NWS-COS-5/50) through a non-clogging baffle that distributes the flow across the width and depth of the chamber for even distribution. Settleable solids drop out into the sludge chamber before the water enters the Coalescing media. Separation Chamber: The separation chamber is filled with coalescing media that allows oil drops to collect on the underside of the plates, coalesce, and then rise toward the surface of the water. The Coalescing media provides a difficult path for the water to pass, continuously changing the direction of the flow, which insures coalescence of the oil droplets. The chamber is designed to separate the sludge and oil from the feed water simultaneously; ensuring the clear water exit into the Treated Effluent Chamber for final disposal. It supports the heavy particles to settle down efficiently for the removal, while the oil droplets float on the liquid surface which shall be skimmed by a fixed but adjustable oil decanter.

Sludge Settling Chamber:

The sludge chamber is located under the separation chamber for capture of heavier particles in the water. The chamber has sloped walls to insure near complete removal of the sludge from the chamber.

Treated Effluent Chamber:

The clean water is passing under an oil reservoir baffle, over an adjustable weir and flows by gravity into the treated effluent chamber. Then it is discharged from this chamber by gravity.

Advantages & Features:

Construction in A-36 Carbon Steel, with Epoxy or Rubber Coating, SS304 or SS 316.
Welds Leakage Tested
Compact Design
Easy Cleaning
Minimal Maintenance
Adjustable / Floating Water Weir