Problem: A facilities manager with a national maintenance company called looking for a corporate solution for their wash pads. They were expanding into several new markets and wanted to standardize their washing and water treatment systems.
Complications included the fact that most of their vehicles are sweeper trucks which generate a lot of solids. A typical wash yields 1/3 yard of solids. With each facility washing 10+ units per day, the amount of solids generated per month was substantial. Also, each facility has a slightly different layout. The good news was that most of them were connected to the municipal sewer.
Solution: Since their solids handling issues needed to be addressed in addition to their washing and water treatment issues, we offered our engineering services to help them design a custom solution that they could standardize as much as possible for their wash bays and solids settling basins.
Once we completed the design, we recommended a number of washing and treatment options based on their desired washing processes. Due to the fact that they had a variety of vehicles and equipment, they decided on both a demucking system and pressure washing system for washing. The demucking system was paired with a partial water reclaim system to recycle the water multiple times before the water was sent through our SPT-20 Clarifier Oil Water Separator System to process it for acceptable discharge to the sewer.
Finally, all of the equipment was installed in a TER-20 Transportable Equipment Room. This will save installation costs as well as allow the customer to move the equipment to a different location in the future. It also saves space inside of the customer’s building for other critical activities.
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.
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
Internal coating for corrosion protection
Grit chamber for high solids applications
Hold down straps
Leak and Level detection systems
Truck and Equipment Washes
How does it work?
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.
Designed to remove extensive contamination, our heavy-duty, multi-stage, discharge treatment systems treat wash water so it can be safely discharged to the sewer or, in many cases, the surroundings.
Stage 1 – Solids Settling
Almost all commercial washing operations produce some solids so the first stage of our filtration process is the solids handling system. We help you develop site-specific solutions to eliminate as many solids as possible before running the water through to the next stage of filtration. Solutions include custom-designed sumps, basins, trenches or screening systems.
Stage 2 – Oils & Solids Separation
After the coarse solids settling, the water is processed through either a multi-compartment stainless steel oil water separator or a stainless steel clarifier oil-water separator, which separates out smaller suspended solids, oil and water. In the first compartment of the clarifier oil water separator, free oils float to the surface. In the second section, the stainless steel clarifying plates remove coarse amounts of oil from the waste stream and remove as much Total Suspended Solids (TSS) as possible. The angles of the non-clogging plates are 55° which will allow any solids to slide down the plates into the solids hopper, where they can easily be pumped out. Finally, the coalescing media removes essentially 100% of all free and dispersed non-emulsified oils so the FOG effluent concentration can be as low as 5 ppm.
Stage 3 – Water Filtration & Polishing
After the clarifier oil-water separator, the water is pumped though a multi-media (sand, gravel, anthracite) filter and then safely discharged to the sewer or surroundings. Processed water passing through the system will be free of substantially all emulsified oils, waxes and other volatile organic compounds with only limited soaps and detergents remaining in the treated water. If needed, a blended activated carbon or a carbon/clay mixture tailored to a particular waste stream can be added as an optional polishing filter.
Non-Ferrous Construction – Stainless Steel, PVC
Clarifier Separator System
Stainless Steel Clarifier Oil/Water Separator with 55° Hopper
Advanced European coalescing media designed to remove oil droplets greater than 20 microns
Electric or Air Diaphragm pump with controller
Discharge Filtration System
Automated Self-Cleaning Multi-Media and/or Clay/Carbon Fiberglass Filter Tank
Heavy-duty, high efficiency Pump
Sensors and interconnecting Schedule 80 plumbing
NEMA-4X control panel
PLC controller for automatic back wash operations
All components mounted on heavy-duty stainless steel skid
Depending on the location, many options are available to maximize the efficiency of the wastewater treatment system including:
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.
We have developed a revolutionary heavy-duty wash and treatment system by integrating our demucking system with our clarifier oil water separator system.
Using low flow pumps, moderate pressure and specialized nozzles, our robustly- designed demucker systems can quickly clean large trucks, tracked vehicles or any heavy equipment caked with mud, clay, ice, or muck – using only 20 gpm of water.
After washing, we can then process this water through our stainless steel clarifier oil water separator to reduce your environmental liabilities. Even though full of solids, oils and grease, our separator will effectively treat this wash water for re-use or discharge.
Fast and effective cleaning with low water treatment costs – definitely a win-win situation!
High-Efficiency Diaphragm or Multi Stage Pump, 20 GPM @ 1000 PSI
Issue: An equipment rental company was expanding and they moved into a new facility
without a wash pad. There was plenty of indoor space but no outdoor space to put in a
new wash pad. The property owner did not want them to cut concrete or substantially
alter the property but our client still needed be able to wash their equipment 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, an industrial-grade electric heated water pressure washer
with two portable hose reels, and a portable wash containment pad.
The portable wash pad allows them to wash as much as possible without any major
modifications to the property. They will also be able to move the entire system to a new
facility, if needed. The wash pad was equipped with pedestrian grating along both sides
so that the service personnel can work safely on a dry surface!
The heavier sludge and particulates fall out of the fluid and are captured in the sludge hopper
The oil and water mixture with lighter particulates travels up the inclined plates
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.
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.
These larger oil particles become so buoyant that they release from the media and travel to the top of the separator.
As the oil volume in the separator reaches a certain level, the oil is drained to through piping to an oil storage tank.
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.
Problem: An engineer consulting with a railroad called with an application at a locomotive repair facility. Over time, lube oil and diesel fuel leaked from the locomotives into an inspection pit. Periodically, the oil along with sand and dirt collected in the pit was discharged into a retention pond. The oil was then skimmed from the surface of the pond and the water discharged to the sewer.
The roe skimmer wasn’t quite doing a good job so he asked us for suggestions on how to better treat the water before discharging to the sewer.
Solution: We recommended installing a SPT-20 Clarifier Oil Water Separator System with our standard air-driven pump and control system to treat the water. The clarifier section of the SPT-20 would remove all of the settleable solids while the coalescing media would remove all of the oil from the waste stream.
The SPT-20 did an excellent job of cleaning up the water during the week. The only issue reported was that their sump overflowed with water every weekend so their staff was met with too much water on the pad every Monday morning.
Our maintenance manager trouble-shot the entire system with their staff through Facetime, phone calls, and emails. A local electrician also tried to find the source of the problem since there were other issues at the facility. They tried multiple modifications but the problem persisted.
Finally, we engineered and assembled a hybrid control system just for their particular location and sent it out to them. The control system worked and the system is now fully operational and the client is very pleased.
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.