Coalescing Oil / Water Separation

  • Product Description
  • Docs & Tools
  • Applications
  • Project Profiles
  • Photos

  • Product Description

    Coalescing plate separators by Rainwater Management are high efficiency oil removers that utilize polypropylene coalescing media. These systems should be installed on sites where a specific oil removal design is required or for sites where only oil is of concern. Suitable sites include gas stations, industrial loading facilities, automotive maintenance facilities, or any site that has the potential for oil contamination.

    Typical baffle box or oil/grit separators only provide gravity separation of free-standing oil where the droplet sizes are usually 150 um and larger. The polypropylene coalescing media utilized in Rainwater Management’s systems is highly selective to hydrocarbons. It is a material used in oil booms to remove large amounts of oil in bodies of water. The media packs are constructed with thinly spaced polypropylene plates which provide maximum surface area to remove oil. The efficiency of Rainwater Management’s coalescing plate separators can achieve hydrocarbon effluent concentrations of 10-15 mg/l.

    All oil droplets naturally rise with a long enough residence time. The smaller oil droplets need the enhanced effect of the coalescing media to allow for removal as the rise velocity is much slower. As flow passes through the polypropylene coalescing media, the hydrocarbon droplets accumulate on the surface of the thinly spaced media to combine together (coalesce) until they are buoyant enough to float to the water surface in the unit.

    Coalescing plate separators by Rainwater Management are available in typical precast concrete vault structures and small diameter precast manhole structures. These small diameter manhole structures are ideal for smaller site applications and offer a lower cost of supply and installation.

    The flow through these systems is laminar. The influent enters the system and must pass over or through an inlet baffle which allows for coarser sediment to settle. The larger oil droplets naturally rise with a long enough residence time. The smaller oil droplets need the enhanced effect of the coalescing media to allow for removal. As flow passes through the polypropylene coalescing media, small hydrocarbon droplets accumulate on the many surfaces of the thinly spaced media to combine together (coalesce) until they are buoyant enough to float to the water surface in the unit. This occurs through the numerous channels running vertically throughout the media. The treated water must flow up a T-pipe or through an outlet baffle leaving behind all the suspended oily pollutants.

    The plates have weep holes that in the bottom of the corrugations that allow for any sediment that may settle in the plates to sink to the bottom of the chamber. This minimizes the need for cleaning the plates.

    Maintenance is performed by pressure washing the media packs inside or outside the unit. Most maintenance can be performed with the plates in place by placing a cleaning wand down through the plates. A standard vacuum truck is utilized to clean out the unit with the oil dealt with according to local regulations.

    *Click on the below thumbnails to change the image.*

    • Typical Manhole Unit
    • Typical Vault Unit

  • Docs & Tools

    Under construction – please contact us for details

  • Applications

    • Industrial loading facilities
    • Truck fueling stations
    • Gas stations
    • Anywhere there is potential for hydrocarbon contamination

  • Project Profiles

    Under construction – please contact us for details

  • Photos

    Under construction – please contact us for details

Pete

Pete on a jobsite for CDS installation

Peter Law, P.Eng.

Graduated from UBC Civil Engineering in 1995 Established Rainwater Management in 2006. 5 years as the Stormceptor representative.

Enjoys: Family time with my wife and 2 kids, playing hockey on a local Port Coquitlam old-timers team, spending time out on the water waterskiing / wakeboarding, mountain biking, snow skiing, and fishing.
Adam

Adam at Ocean Pipe for CDS pre-installation

Adam Perczyk, AScT, C.E.T.

Graduated from BCIT Civil Engineering in 2006. 2 years as the Vortechnics representative.

Enjoys: Family time with my wife and daughter, playing guitar, golf, snowboarding, mountain biking and spending time in beautiful Golden Ears Park (trails, beach, BBQ).
Stormwater System Inspection

Stormwater System Inspection


Stormwater System Clean Out

Stormwater System Clean Out


CDS Technologies System Collects Trash

CDS Technologies System Collects Trash