Our standard media has vastly superior properties compared to the traditional media used in oil-water separators. These properties result in a more efficient and effective separation than that attained by traditional coalescing media.
Give us a call at 800-453- 8639 for more information!
Even though the terms “Oil Interceptors” and “Oil Water Separators” are often used
interchangeably, they are very different systems.
Oil interceptors are typically used in low flow drain lines where small quantities of oils, sediment
and other liquid contaminants can be “intercepted”. These drain lines may come from variety of
facilities including covered parking garages, machine shops, service stations, and manufacturing
Usually constructed of steel, fiberglass or plastic, interceptors are simple systems which include a
baffle plate, a solids bucket, and a separation area. As the water enters the interceptor, a baffle
plate reduces the flow and turbulence of the incoming water which helps to drop out some solids
A low flow rate and little turbulence permits the oils and other light density to slowly separate from
the water and rise to the top of the separation area. From there, relatively oil-free water is
discharged to the sewer.
In comparison, Oil Water Separators have a far more sophisticated and efficient design. They are used in higher volume applications such as industrial wash operations, parking lots, re-fueling facilities and military installations where there is a potential for a much higher volume of water, oil, and contaminants.
The standard oil water separator is a steel or stainless steel tank containing an inlet compartment, baffles system, sludge chamber, separation chamber with coalescing media, and clean water outlet chamber.
The water enters the inlet compartment where the oil separation process begins. Here, baffles slow down the water flow which causes some of the solids to drop out of suspension. Next, parallel corrugated coalescing media in the separation chamber cause the oil droplets in the water to coalesce together, and increase in size until they separate from the water. This coalescing media, with an internal structure of interconnecting channels, can remove essentially all free and dispersed, non-emulsified oils to an effluent concentration of less than 5 ppm – which is acceptable for discharge to most municipal sewer systems.
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.
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||30-60||350||3.5 x 6|
|WB-QB-548||55-110||550||4 x 6|
|WB-QB-1048||100-200||1000||4 x 10.75|
|WB-QB-2064||200-400||2000||5.3 x 12|
|WB-QB-3064||300-600||3000||5.3 x 18|
|WB-QB-4064||400-800||4000||5.3 x 24|
|Larger sizes available.|
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!
Please see a list of question and answers below related to our oil water separator products.
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.
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.
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!
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.
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.
The SPT Series Integrated Pretreatment Systems integrate an oil water separator with a clarifier to remove both floating oils and settleable solids.
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.
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.
(Barrels Per Day)
Plate Area, SF
Coalescing Volume, CF