Oil Water Separators

October 1, 2019
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Above Ground Clarifier Oil Water Separator Flow Process

  1. The oil/water/sludge mixture enters the oil water separator
  2. The heavier sludge and particulates fall out of the fluid and are captured in the sludge hopper
  3. The oil and water mixture with lighter particulates travels up the inclined plates
  4. The inclined plates start to separate the mixture. Some oil rises to the top of the separator and the remainder of the particulates slide back down to the sludge hopper.
  5. The remaining oil and water mixture then moves through the coalescing media packs where the majority of the smaller oil particles attach to the media and combine together to form larger oil particles.
  6. These larger oil particles become so buoyant that they release from the media and travel to the top of the separator.
  7. As the oil volume in the separator reaches a certain level, the oil is drained to through piping to an oil storage tank.
  8. The clean water continues over the weir to the clean water chamber where it goes through a final polishing pack and out to the sewer.

WashBaySolutions.com offers a full line of oil and water separators that conform to the guidelines of API 421 for the removal of all free and dispersed non-emulsified oil and solids that settle from the waste stream. Get a Quote Today!

Oil Water Separator – Frequently Asked Questions

Please see a list of question and answers below related to our oil water separator products.


April 9, 2019
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Problem: A car dealer moving into a new facility with a limited time lease. The property owner did not want them to cut concrete or substantially alter the property but the dealer needed to be able to wash dozens of cars per week onsite, contain the water and discharge it properly to the sewer.

Solution:  For a complete wash system, we recommended installing a SPT-10 Clarifier Oil Water Separator System, a cold water pressure washer with a portable hose reel, and a portable wash containment pad. This allows them to wash as many cars as possible without any major modifications to the property.  They will also be able to move the entire system to a new facility at the end of their lease. With their input, we helped them layout the system to maximize their space.

After installation of the pad, however, they noticed the concrete floor slope much slighter than originally thought and that the wash water was not moving off the pad well.  This flat slope left his staff working in standing water and the SPT-10 not being able to process the wash water properly.

To improve this drainage issue, our staff developed a low cost under layer for the wash pad which created a slight slope for the water.  We then installed this under layer and re-piped the in-take piping for the SPT-10 so the wash water flows freely.  The general manager of the facility is very pleased with our systems and service.


March 8, 2018
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New CF-CP Media (Cross-Flow/Corrugated Plate) Oil Water Separator Media
Image of our New CF-CP Media (Cross-Flow/Corrugated Plate)
Oil Water Separator Media

In many washing applications, solids are a main component of the washing process. Heavy solids such as rocks and muck are often washed off and fall onto the wash pad where they can be easily removed. Other, finer settleable and suspended solids, however, often become entrained in the oily wash wastewater. Separating these settleable or suspended solids from the oily wash water is critical so that they do not clog the separator media and interfere with the oil water separation process.

To insure our oil water separators work well in a high solids environment without clogging, we have introduced a new coalescing media with a corrugated, cross-flow design.

This new media design is both unique and simple. As the water enters the separator, the flow is directed evenly across the surface of the media plates. The solids are captured and fall to the trough area of the corrugated plates below and the oils rise and stick to the trough area of the plates above. This design maintains laminar flow throughout the media so the oil and solids do not remix. Since the plates are smooth, the solids slide down the corrugated plates to the hopper area where they can be easily removed. Separated oil flows upwards along the plates to the top of the separator where it can be removed.

  • Available in stainless steel, PVC, HPVC and polypropylene
  • Plate spacing of ½”, ¾” or 1 ¼” depending on application
  • Supplied in blocks for easy installation and removal

By coupling high efficiency separation with easy maintenance, this new media will ensure your oil water separator
operates at peak performance for years to come.

Give us a call at 800-453- 8639 for more information!

CF-CP Media (Cross-Flow/Corrugated Plate) Oil Water Separator Media
Introduced a new coalescing media with a corrugated, cross-flow design.

CF-CP Media (Cross-Flow/Corrugated Plate) Oil Water Separator Media
Site View of our new coalescing media with a corrugated, cross-flow design.


July 10, 2017
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Back in the day… oil water separators were basically concrete vaults or steel tanks that were sized based on their total holding capacity. This holding capacity was related to the retention time needed to separate the oil from the water. Most cities and counties would size the oil water separators based solely on the square footage of area draining into the separator. This method, which rightfully erred on the side of caution, often tended to require facility owners to purchase extremely large separators.

Today… our oil water separators are engineered with multiple compartments and equipped with extremely efficient coalescing media to separate the oil from the water mixture in a much smaller system! Our media is capable of removing essentially all free and dispersed non-emulsified oils to an effluent concentration of less than 5 ppm. We now size our separators based mostly on oil viscosity and flow rate so they can be much smaller than they were in the past.

If needed, we can provide information and analysis to the regulatory agencies, which indicates that, at the calculated overflow rate, the separator will be properly sized and provided with the required square feet of projected plate separation area to achieve the specified performance under laminar flow conditions. Calculations shall take into account the rate of flow, potential surge flow, influent concentrations, particle characteristics, fluid temperature, fluid specific gravities, and PH.

Above Ground Oil Water Separators

We offer a complete line of high efficiency, stainless steel above ground oil water separators that will remove nearly all free and dispersed non-emulsified oil and settleable solids from the waste stream.

Read More About Oil Water Separators

Sewer Pre-Treatment (SPT) System Oil Water Separator Clarifier System for High Solids Applications

Oil Water Separator Clarifier System

The SPT Series Integrated Pretreatment Systems integrate an oil water separator with a clarifier to remove both floating oils and settleable solids.

Read More About SPT Series Sewer Pretreatment Systems

Below Ground Oil Water Separator

Below Ground Oil Water Separator Design
Featuring one of our oil water separator designs to be placed under ground.
Our single wall or double wall below ground parallel corrugated plate oil/water…

Read More About Below Ground Oil Water Separators

List of Different Kinds of Oil Water Separators:


May 12, 2016

The terms “Oil Interceptors” and “Oil Water Separators” are often interchanged. They are, however, as their names indicate, very different.

Interceptors

Oil interceptors
Oil interceptors are designed for use in drain lines where oils, sediment and other liquids are intercepted.

Oil interceptors are designed for use in drain lines where oils, sediment and other liquids may be found in small quantities and flow rates and the contaminants can be “intercepted”. These drain lines may come from parking garages, machine shops, service stations, and manufacturing facilities where there is a chance that at spill may occur.

They are usually simple, steel, fiberglass or poly boxes which include a baffle plate, a solids bucket, and a separation area. As the water enters the interceptor, a baffle plate diffuses the flow, reducing the turbulence of the incoming water. Depending on the water flow, some solids and sludge are stopped by the baffle and collected in the solids bucket.

A low flow rate and little turbulence permits the oils and other light density substances to rise to the surface of the water as it goes through the interceptor, producing relatively oil-free water for discharge.

Oil Water Separators

Oil Water Separator
Oil Water Separators have a much more sophisticated design so they are used in applications where there is a potential for a much higher volume of water and oil.

Oil Water Separators have a much more sophisticated design so they are used in applications where there is a potential for a much higher volume of water and oil such as industrial wash operations, parking lots, re-fueling facilities and military installations.

The standard oil water separator is a tank containing an inlet compartment, baffles system, sludge chamber, separation chamber, and clean water outlet chamber.

The water enters the inlet compartment where the oil separation process begins and solids drop out. In the separation chamber, parallel corrugated plates cause the oil droplets in the water to increase in size, thereby speeding the gravity separation process. The water then goes through coalescing media, with an internal structure of interconnecting channels, which can remove essentially all free and dispersed non-emulsified oils to an effluent concentration of less than 5 ppm. This design produces enhanced efficiencies, resulting in significantly smaller units for high volume applications.


June 10, 2014
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Oil and Solids Water Separation Unit
The Solids and Oil Water Separation Systems (SOWS) are horizontal gravity flow treatment systems designed to separate settleable solids, suspended solids, and free and dispersed oil.

New SOWS Systems Remove Both Free & Dispersed Oil AND Settable & Suspended Solids!

Introducing the new Best Available Technology (BAT) for the treatment of produced water and flow-back water. The Solids and Oil Water Separation Systems (SOWS) are horizontal gravity flow treatment systems designed to separate settleable solids, suspended solids, and free and dispersed oil.

This system is a significant improvement to the currently used CPI Separators which can only separate free oil and settleable solids – allowing a considerable amount of dispersed oil, suspended solids, and stable emulsions to pass through the system.

Applications:

  • Onshore and Offshore Drilling Operations
  • Oil Refineries
  • Produced Water
  • Waste Oil Processing Facilities

Benefits:

  • No moving parts
  • Low maintenance
  • Heavy duty carbon or stainless construction

The SOWS System has 5 stages of separation.

Solids Oil Water Separation
Solids Oil Water Separation

Stage 1, Inlet Area – The water mixture flows into the inlet quiescent area where the velocity of the water slows. The free oil (150 micron in size or greater) separates and rises to the surface where it is removed by a pipe skimmer.

Stage 2, Clarifier/Solids Intercept Section – The settleable solids flow downward and are captured in the clarifier/ solids intercept section.

Stage 3, Inclined Plate Section – The suspended solids and dispersed oil flow upward through the inclined plates section. Most of the suspended solids will slide down these plates into the hopper.

Stage 4, Separation Compartment – The remaining suspended solids and dispersed oil flow into the separation compartment where the coalescing plates remove 99% of the free oil droplets 30 micron or greater. This oil rises to the surface where an oil skimmer decants it to an oil storage tank. The coalescing plates then capture the remaining suspended solids.

Stage 5, Clean Water Compartment – The flow of water will go over the overflow weir into the clean water compartment where oil absorption polishing bags trap any trace oils before the water is discharged.

SOWS Solids Oil Water Separation Systems

Model BPD
(Barrels Per Day)
GPM Width Length Height Inlet
Outlet Dia
Clarifier
Plate Area, SF
Separator
Coalescing Volume, CF
Sludge
Volume (Gal)
Total
Capacity (Gal)
SOWS-150 5,140 150 6′-6″ 20′-0″ 9′-0″ 6″ 600 64 300 4250
SOWS
-200
6,850 200 6′-6″ 20′-0″ 10′-0″ 6″ 800 80 300 4930
SOWS
-250
8,570 250 7′-6″ 20′-6″ 10′-0″ 8″ 1000 96 350 5810
SOWS
-300
10,285 300 8′-6″ 21′-6″ 10′-0″ 8″ 1200 120 400 7040
SOWS
-350
12,000 350 8′-6″ 23′-0″ 10′-0″ 8″ 1400 150 425 7480
SOWS
-400
13,715 400 8′-6″ 24′-6″ 11′-0″ 8″ 1600 150 500 8500
SOWS
-450
15,430 450 9′-6″ 26′-0″ 11′-0″ 8″ 1800 175 525 10020
SOWS
-500
17,140 500 9′-6″ 26′-6″ 11′-0″ 8″ 2000 210 550 10450
SOWS
-550
18,855 550 9′-6″ 28′-0″ 12′-0″ 8″ 2200 210 675 11580
SOWS
-600
20,570 600 9′-6″ 29′-6″ 12′-0″ 10″ 2400 240 700 13240
SOWS
-700
24,000 700 10′-6″ 30′-0″ 12′-0″ 10″ 2800 288 750 15450
SOWS
-800
27,425 800 10′-6″ 31′-0″ 12′-6″ 10″ 3200 324 775 17540
SOWS
-900
30,860 900 10′-6″ 32′-6″ 13′-0″ 12″ 3600 324 800 19260

April 22, 2014
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Industrial Process Water Clarifier Oil/Water Separators
By removing 99.9% of the free oil and settable solids, our oil/water separators systems will extend the life of the cleaning baths and improve the quality of the process waters.

Many industrial processes use large amounts of water for a variety of reasons including cooling and cleaning. To assure continuous production, this water has to be clean and free of contaminants such as oil and particles.

The cost of chemicals and downtime to re-charge the spent baths can be expensive. By removing 99.9% of the free oil and settable solids, our oil/water separators systems will extend the life of the cleaning baths and improve the quality of the process waters.

Available in a range of dimensions and flow rates, these separators can be constructed of stainless steel or carbon steel that is coated for corrosion protection. All of our systems are constructed of heavy-duty components for maximum life and performance. They can be integrated into existing process lines and customized with hoppers or oil storage compartments and a variety of skimming, monitoring, and pumping packages.

Benefits

  • 99% Removal of all free oil
  • High solids removal and storage capability
  • Small foot-print
  • High flow rates in a compact design
  • Low maintenance costs

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

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

info@washbaysolutions.com

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