below ground oil water separator

May 13, 2022
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Our new solids settling below ground separator is ideal for any application with high concentration of solids and oil in water.

Most old conventional separators require long retention times, resulting in needlessly large units. They also have little in the way of solids settling. Our new innovative new design has both a much smaller footprint and a much higher removal efficiency for both oil and solids which lowers your total cost of ownership.

How it works:

To enhance separation, these separators contain an inlet diffuser, grit chamber/inlet compartment, down tube, coalescing/separation chamber, oil storage area, effluent compartment, and sheen filter.

Series WB-ES Solids Settling, Below Ground Oil Water Separators

  • In the Grit Chamber, the inlet diffusor initially distributes the incoming water flow evenly over the cross-sectional area of the separator. The free oil (150 micron size or larger) is separated and the settleable solids are captured at the bottom.
  • The suspended solids and dispersed oil then flow upward through the down tube in the Grit Chamber, and over to another diffusor in the Coalescing Chamber.
  • The flow continues through the Coalescing Chamber where the coalescing plates will separate the oil droplets 30 micron size and larger up to the surface, and the remaining suspended solids will be captured beneath the coalescing plates.
  • Finally, a removable Sheen Filter inside the up tube in the Effluent Compartment will remove carryover, smaller droplets of oil, and mechanical emulsions.

Performance Standards

  • Utilizes patented, revolutionary, non- plugging coalescing plates which remove free oil droplets as small as 30 microns
  • Performance guarantee based on influent characteristics
  • Will achieve discharge of 5 ppm or less in accordance with CEN EN 858-1
  • Warranted for (1) year on material and workmanship and (10) years against external corrosion

 

Below Ground Oil Water Separator Models

Model # Average Flow Rate (GPM) Capacity

(Gallons)

Inlet/Outlet (Inches) Dimensions, D x L (Feet)
WB-QB-35-ES 35 350 4 3.5 X 6
WB-QB-55-ES 55 550 4 4 X 6
WB-QB-100-ES 100 1000 6 4 X 10.75
WB-QB-200-ES 200 2000 6 5.3 X 12
WB-QB-300-ES 300 2500 6 5.3 X 15
WB-QB-400-ES 400 3000 8 5.3 X 18
WB-QB-500-ES 500 3800 8 6 x 17.5
WB-QB-600-ES 600 4000 10 6 x 18.75
WB-QB-700-ES 700 7000 10 8 X 18.67
WB-QB-800-ES 800 7000 10 8 X 18.67
WB-QB-900-ES 900 7000 12 8 X 18.67
WB-QB-1000-ES 1000 7500 12 8 X 20
WB-QB-2000-ES 1200 8500 12 8 X 22.5
WB-QB-1500-ES 1500 12000 16 10 X 20.75
WB-QB-2000-ES 2000 14000 18 10 X 24
WB-QB-2500-ES 2500 17000 18 10.5 X 26.5
WB-QB-3000-ES 3000 19000 20 10.5 X 29

         Call Now to Speak with a Oil Water Separator Specialists – 1-800-453-8639!


May 6, 2022
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Our single wall or double wall below ground parallel, corrugated plate oil/water separators meet and exceed API 421 requirements, removing essentially 100% of dispersed non-emulsified oil droplets in the waste stream.

These separators are special purpose prefabricated parallel corrugated plate, cylindrical, gravity displacement oil water separators, containing an inlet compartment, sludge chamber, separation chamber, oil storage area and clean water compartment.

As shown below, the separation process if fairly simple. Wastewater flows into the inlet compartment. A baffle interrupts the flow and allows solids to drop out. Next the oil water moves into the separation chamber where our innovative media causes small oil droplets entrained in the water to coalesce into larger ones which then separate from the water and float to the surface. The clean water then travels into the clean water compartment through the outlet to the sewer.

Features

  • Patented, revolutionary, non- plugging coalescing plates which remove free oil droplets as small as 20 microns
  • Single wall or double wall construction with interstitial space for leak detection
  • Rectangular access manhole with 3’ extension to service and maintain coalescing media
  • Fittings for vent, oil pump out, sludge pump out, gauging and lifting lugs
  • Exterior sandblasted and coated
  • Will achieve discharge of 5 ppm or less in accordance with CEN EN 858-1
  • Warranted for (5) years on material and workmanship and (30) years against external and internal corrosion
  • Construction in accordance with UL58 and corrosion protection in accordance with UL1746
Below Ground Oil Water Separator Design
Featuring one of our oil water separator designs to be placed under ground.

Options

  • Internal coating for corrosion protection
  • Grit chamber for high solids applications
  • Hold down straps
  • Leak and Level detection systems

Applications

  • Parking Lots
  • Re-fueling Facilities
  • Marinas
  • Military Installations
  • Truck and Equipment Washes

How does it work?

Analysis

With these separators, we can provide analysis, which indicates that the separator will be provided with the required square feet of projected plate separation area to achieve the specified performance under laminar flow (i.e. Reynolds Number of less than 500) conditions. This service can include calculations signed by a registered professional engineer.

Underground Oil Water Separator Specifications
Model # Average Flow Rate (GPM) Capacity (GALLONS) Dimensions, D x L (FT)
WB-QB-342 35 350 3.5 x 6
WB-QB-548 55 550 4 x 6
WB-QB-1048 100 1000 4 x 10.75
WB-QB-2064 200 2000 5.3 x 12
WB-QB-3064 300 3000 5.3 x 18
WB-QB-4064 400 4000 5.3 x 24
Larger sizes available.

Underground Oil Water Separator Specifications

Frequently Asked Questions

 


April 22, 2014
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Oil Water Separator for Stormwater
Our stormwater oil water separators will remove solids and all free and dispersed non-emulsified oil droplets 20 micron or greater in size and produce an effluent discharge of less than 5 PPM.

The first phase of a rainstorm can be deceiving. The peaceful melody of the droplets can quickly disperse over parking lots, fueling depots, and washing areas that all contain pollutants, such as oil and grease. Because impervious surfaces do not allow rain to infiltrate into the ground, storm water runoff is generated. Surface runoff or storm water runoff then becomes a major threat to our nation and our clean water supply.

In order to protect our clean water supply these waters have to be treated before being discharged from storm sewers to surface waters. Our WB-QB oil water separators will remove solids and all free and dispersed non-emulsified oil droplets 20 micron or greater in size and produce an effluent discharge of less than 5 PPM.

Most municipalities have storm water departments that are made to protect water resources and reduce impacts from storm water runoff.  They also are responsible for the compliance of requirements for the National Pollutant Discharge Elimination System (NPDES) permits.

Our efficient, below ground separators meet pretreatment SPCC and NPDES permits for local communities.

Our proprietary design incorporates patented revolutionary non-plugging poly-propylene coalescing plates. Our coalescing media exceeds all known American performance standards including UL 2215, and has been tested in accordance with European Union Standard CEN EN858-1, which requires a discharge limit of less than 5 PPM. Our separator tanks are manufactured to UL 58 and UL 1746 Standards. Construction can be either single wall or double wall with a corrosion protection system.  Sizes are available up to 4000 GPM flow rate.

Operation Maintenance

  • All models can be serviced from grade level
  • No confined spaces
  • Plates easily removed, washed down and put back in place
  • Solids can be pumped out through large access opening from grade level

Options Available

  • Grit chamber for solids removal prior to coalescing compartment
  • Effluent pump out chamber after coalescing compartment
  • Oil stop valve to retain lighter liquids from leaving separator
  • Leak detection and level indicating systems
Model # Average Flowrate (GPM) Approximate Capacity (Gallons) Dimensions Diameter x Length (FT)
WB-QB-342 10-30 350 3.5 x 6
WB-QB-548 30-50 500 3.5 x 9
WB-QB-1048 50-100 1000 4 x 11
WB-QB-2064 100-200 1500 5 x 12
WB-QB-2564 200-300 2000 5 x 21
WB-QB-2572 300-400 2500 6 x 12
WB-QB-3272 400-500 3200 6 x 15
WB-QB-4072 500-800 4000 6 x 19

September 18, 2012

In many cases, a below ground oil water separator is the best option due to space restrictions and layout. You can use gravity to drain into a below ground system and then into the sanitary sewer system so there is no need for pumps and controls. In other cases, a below ground system has been previously specified and it is not possible to change the specifications.


North Carolina

Headquarters

At WashBaySolutions.com, we have been specializing in high tech, custom-engineered solutions to complex washing and wastewater issues since 1991.
+ 1 800-453-8639

WashbaySolutions.com

sales@washbaysolutions.com

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