®

Highland Tank

Oil/Water Separators

Featuring the Corella® Coalescer

Highland Tank is the leader in the steel tank industry

and has been building oil/water separators for

decades. Years of experience enable Highland

Tank to provide solutions to the most challenging

wastewater treatment needs. Our team of

design, engineering, fabrication and service

professionals bring years of experience and

knowledge from other steel tank fields to

this market. These innovative techniques

improve the overall quality and life of the

vessel while simplifying installation and

everyday use. Our custom-build

capability sets Highland Tank

apart from the competition.

Oil/Water Separators

Oil/Water Separators In Action

Highland Tank provides the strongest and most reliable oil/water separators in the industry.

Our separators are designed to remove oil, grease, light petroleum products and oily-coated solids from a variety of wastewater discharges.

The effluent from oil/water separators is typically discharged to either a storm sewer or a sanitary sewer system.

Since 1986, Highland Tank’s Oil/Water Separators have set the standard for reliability. Our parallel plate separators are highly-efficient — treating wastewater under a wide range of conditions. Unlike other oil/water separators, they are easy to install, operate and maintain.

A wide range of industrial applications require high-efficiency oil/water separators. Some examples include:

• Airports & Aircraft Services • Electric Utilities & Power Plants • Environmental Remediation • Industrial Facilities • Military & Government Installations • Municipalities • Petroleum Production & Marketing Facilities • Railroad Yards • Transportation Companies

They are also located in many vehicle service areas associated with fueling, repair and maintenance shops and wash areas.

Exceeding Large Stormwater Treatment System Needs

Environment Canada (EC) is a diverse organization with programs, services, and people leading the way in implementing Canada’s environmental agenda.

The Canadian Environmental Protection Act and Pollution Prevention programs require “the use of processes, practices, materials, products, substances or forms of energy that avoid or minimize the creation of pollutants and waste, and reduce the overall risk to the environment or human health.”

Canadian stormwater discharge regulations are very similar to those in the United States. Environmental rules impact a multitude of business sectors such as mines, manufacturing plants, refineries, transportation systems, and many others with potential to create and discharge wastewater associated with industrial processes.

The expansion of operations at a large metal manufacturing facility in the Province of Quebec was completed in compliance with EC rules through the use of high-performance oil/water separators.

Due to the proximity of the plant to a sensitive waterway, the design engineering team specified multiple Highland Tank oil/water separators to help the facility satisfy the strict effluent discharge regulations.

The project resulted in significant upgrades to the storm water collection system and the installation of five Highland Tank Model HTC-60,000 gallon oil/water separators, designed for the treatment of contaminated stormwater runoff. Each separator is rated for 0-6,000 GPM flow rate and discharge with an average effluent quality well within theenvironmental limits.

Heavy-duty steel construction using ¼” thick mild-carbon steel in strict accordance with Highland Tank’s HighGuard Corrosion Control System was employed, and each separator was fitted with Highland Tank’s exclusive EZ Access manway design.

This fast-track project - including design specifications, review, approval, fabrication and delivery - was completed within one year, demonstrating Highland Tank’s commitment and dedication to providing outstanding customer service.

The double-wall separators measured 13’ in diameter; 60’ 6” long and weighed nearly 95,000 lbs each. All five HTC-60,000 oil/water separators were delivered in three stages over the course of 30 days to accommodate installation requirements on site.

Solids slide off flat plate tops

and settle in collection area

Double-wall construction available with interstitial leak monitoring

Rugged steel construction for greater structural strength, superior product compatibility, and unsurpassed corrosion resistance

Oil coalesces into sheets on the corrugated undersides and flows upward

Corella® and Petro-Screen coalescers are removable from above

Fluid level cannot rise into manways for total secondary containment

Inlet and outlet through separator heads for shallower burial depths

Effective wastewater treatment at varying flow rates and concentrations

Patented internal baffles and coalescers accelerate the separation process for unparalled performance down to 10 ppm free oil

Large rectangular manways, with removable, lightweight top panels for easy access and maintenance

Corella®

Technology

The Corella® Coalescer is a removable, inclined parallel, flat/corrugated plate coalescer that enhances separation of both oil and solids from all strata of the wastewater stream. It is individually engineered to specific application and job-site requirements to maximize utility.

Corella® inclined parallel plate coalescers combine the features of flat and corrugated plate coalescers into a dual-function design that performs better than traditional plate coalescers.

Plate clogging is the primary reason for separator failure. Corella’s® multi-purpose plates greatly reduce the accumulation of settleable solids in the plate pack and minimize separator shutdown and maintenance by simultaneously separating free oil droplets and settleable or suspended solids from water.

Corella® plates are assembled and arranged to allow settleable solids to accumulate on the flat top of the plates and slide downward, while the oil coalesces into sheets on the corrugated undersides and flows upward. Unlike other oil/water separators, both oil and solids are removed, minimizing shutdowns for periodic cleaning.

With Highland Tank’s EZ Access manways, inspection of the Corella® takes less effort, eliminating dangerous confined space entry requirements. Access from above permits separator pump-out and cleaning using a high-pressure washer without removing the coalescer pack. Hazardous materials are not discharged at grade during the cleaning process.

The non-traditional Corella® plate pack is available with variable length, angle and spacing, tailored to your specific separator duty. They can be configured to meet a wide variety of capacities and conditions and can be integrated with many other unit operations to provide a total solution to a water treatment problem.

Features, Advantages & Benefits

• Permits separation of mixtures containing both oil and settleable solids, minimizing coalescer clogging

• Corella® plates are manufactured of oleophilic material

• Increases oil/water separation efficiency - reduces clogging

• Normal operating temperatures from 40º to 120º F with higher operating temperature units available

• Handles a wide range of oils, specific gravities and suspended particle concentrations

• Corella® plate packs consist of multiple cartridges to allow for easy removal

• Custom packs are available for higher flow rates, temperatures and solids loading

The Corella®

Coalescer

Model HTC Oil/Water Separator with EZ Access option shown.

*Optional equipment available from Highland Tank **Installer supplied equipment

OWS in Operation

The stationary wastewater treatment tank begins service completely filled with water with engineered internal baffles and coalescers fixed and ready to enhance the oil/water separation process.

Our separators are designed to allow convenient access for inspection and maintenance. The EZ Access Manways permit unconfined access to the internal workings of the separator.

Flow is directed from the inlet pipe against the diffusion baffle to reduce turbulence and distribute flow evenly. Sediment and heavy solids settle out while concentrated oil begins to rise to the surface. The oily water then enters the Corella® Coalescer where oil/water separation is enhanced by the inclined pack of flat/corrugated Corella® plates.

The corrugated underside causes oil to coalesce into sheets, making the oil globules rise to the surface quicker. Remaining solids drop onto the plate tops then slide off into the collection area. The effluent continues to flow toward the outlet and is only discharged by gravity displacement. Before being discharged, the effluent must pass through the second coalescer.

Highland Tank’s Petro-Screen polypropylene impingement coalescer is an encased bundle of layered oil-attracting fibers used to intercept droplets of oil that are too minute to be removed by the Corella® Coalescer.

The Petro-Screen effectively removes oil droplets down to 20 microns in diameter achieving the UL-SU2215, 10 PPM effluent rating.

Complete Custom Systems Highland Tank has many accessory components available to complete your wastewater treatment system. Electronic monitoring is available to sense for oil levels. Sensors can turn oil removal pumps on and off automatically.

Double-wall separators can be monitored with electronic leak detection sensors installed in the interstitial space to detect an unlikely leak. Electronic monitoring systems can be supplied with audible and visual alarms.

An adequate anchoring system is essential for maintaining the separator’s stationary position. Our Deadmen Anchoring System provides concrete anchors and polyester hold-down straps designed specifically for each of our separator models.

Outlet Vent Piping**

Flanged Outlet Piping

Manway Vent Piping**

Monitoring Pipe

Isolation Spool Piece(where required)

Oil/Water Interface

Highland Deadmen Anchors or Hold-Down Pad**

WaterOutflow

OutletDowncomer

OUTLET

Interface &Level Sensor*

Corella®

Parallel / CorrugatedPlate Coalescer

Flanged Manways & Covers

Inlet Vent Piping**

Concrete Top Pad**

Flanged Inlet Piping

Sediment Chamber

Sludge Baffle

Underflow Baffle

INLET

Isolation Spool Piece(where required)

Petro-ScreenCoalescer

Tank Interstice & Leak Detection Sensor

Pea Gravel or otherapproved backfill material

Alarm / Control Panel

Grade Level Manways & Covers*

Interface &Level Sensor Pipe

Oil Pump-Out Pipe

Velocity HeadDiffusion Baffle& Wear Plate

Innovation, Quality and Economy Rectangular separator design permits total, unconfined, unrestricted OSHA-compliant top access for safe visual inspection, cleaning and maintenance.

Easy to Install, Operate & Maintain

Rectangular oil/water separators are typically installed aboveground to help industrial facilities

comply with the EPA's spill and discharge regulations. Like our underground cylindrical units, these separators

are equipped with our patented-design Corella® coalescers that accelerate the separation process and greatly reduce the level of oil

and oily-coated solids discharged into a municipal storm or sanitary sewer.

When a northern Florida electric utility acquired some additional property for expansion, concerns for water quality now and into the future had to be considered. However, there was an environmental situation that needed to be addressed immediately.

The expansion project area was oncethe home to a railroad tie manufacturing plant. The process for making railroad ties includes treating wooden timbers with Creosote, a bi-product from burning coal, oil or wood.

Over many years of tie production, the Creosote leached into the ground, contaminated the groundwater and threatened the area’s entire water system. Highland Tank was chosen to supply the right device for the groundwater remediation project.

OWS for RemediationRectangular Oil/Water Separators

Florida is experiencing an increase in population growth throughout the entire state. To meet new demands and provide a reliable, sustained supply of quality water, a well-managed and ample water resource is essential.

To provide this fundamental, often taken- for-granted service, research and understanding of the hydrologic conditions of the new areas being developed is paramount.

Industrial, commercial and residential development can place a stranglehold on inadequate water supplies. Realizing the need for a better understanding of water resources by the general public, Florida has worked with the U.S. Geological Survey to identify potential problems and address concerns.

An aboveground model R-HTC-2000 rectangular separator was installed to process and clean groundwater prior to release back into the water system. The uniquely engineered separator has an integral oil skimming device to remove separated oils on a continuous basis. In addition, an integrated sludge hopper provides additional space for solids to be collected and then removed with minimal disruption to the system. Visual and electronic level indicators monitor levels in the separator to help with routine maintenance.

Highland Tank also provided a vertical storage tank for process water to be stored prior to the final filtration treatment and ultimate release back into the environment.

Rectangular OWS

Flow Total Recommended Inlet & Model Rate Volume Oil Pump-out Outlet R-HT or R-HTC Gal/Min Gallons Gallons L x W x H Diameter

100 5 100 20 5'-0" x 1'-6" x 3'-0" 1" 200 10 200 40 5'-0" x 2'-0" x 3'-0" 2" 300 25 300 60 7'-0" x 2'-0" x 3'-0" 3" 600 50 600 120 9'-0" x 3'-0" x 3'-0" 4" 900 75 900 180 10'-0" x 3'-0" x 4'-0" 6" 1,000 100 1,000 200 11'-0" x 4'-0" x 4'-0" 6" 2,000 200 2,000 400 12'-0" x 5'-0" x 5'-0" 8" 3,000 300 3,000 600 18'-0" x 5'-0" x 5'-0" 10" 4,000 400 4,000 800 18'-0" x 6'-0" x 5'-0" 10" 5,000 500 5,000 1,000 20'-0" x 6'-0" x 6'-0" 10" 6,000 600 6,000 1,200 19'-2" x 7'-0" x 6'-0" 10" 7,000 700 7,000 1,400 19'-2" x 7'-0" x 7'-0" 10" 8,000 800 8,000 1,600 19'-2" x 8'-0" x 7'-0" 10" 9,000 900 9,000 1,800 18'-10" x 8'-0" x 8'-0" 12" 10,000 1,000 10,000 2,000 20'-11" x 8'-0" x 8'-0" 12" 12,000 1,200 12,000 2,400 19'-10" x 9'-0" x 9'-0" 12"

15,000 1,500 15,000 3,000 24'-9" x 9'-0" x 9'-0" 14"

20,000 2,000 20,000 4,000 29'-9" x 10'-0" x 9'-0" 16"

25,000 2,500 25,000 5,000 33'-6" x 10'-0" x 10'-0" 18"

30,000 3,000 30,000 6,000 40'-10" x 10'-0" x 10'-0" 20"

Plate spacing and orientation may vary depending on site conditions. Custom sizing is available. Consult Highland Tank for Series G, J, S & TF sizing information.

WidthLength

Removable Top Cover with Lifting Handles

OptionalSupport Legs

Lifting Lug

Oil DamCorella® ParallelPlate Coalescer

OptionalSludge Hopper

Petro ScreenCoalescer

OUTLET

INLET

Velocity Head

Diffusion Baffle

Height

Adjustable EffluentTransfer Pipes

Tank Dimensions

Diameter

Separator Sizing Guide

Flow Total Recommended Inlet & Model Rate Volume Oil Pump-out Outlet HT or HTC Gal/Min Gallons Gallons Diameter Length Diameter

350 35 350 70 3'-6" 6'-0" 4" 550 55 550 110 3'-6" 7'-9" 4" 1,000 100 1,000 200 4'-0" 10'-9" 6" 2,000 200 2,000 400 5'-4" 12'-0" 6" 3,000 300 3,000 600 5'-4" 18'-0" 8" 4,000 400 4,000 800 5'-4" 24'-0" 8" 5,000 500 5,000 1,000 6'-0" 23'-10" 8" 6,000 600 6,000 1,200 6'-0" 28'-8" 10" 7,000 700 7,000 1,400 7'-0" 24'-4" 10" 8,000 800 8,000 1,600 7'-0" 28'-0" 10" 9,000 900 9,000 1,800 8'-0" 24'-0" 12" 10,000 1,000 10,000 2,000 8'-0" 26'-8" 12" 12,000 1,200 12,000 2,400 8'-0" 32'-0" 12" 15,000 1,500 15,000 3,000 10'-0" 25'-6" 14" 20,000 2,000 20,000 4,000 10'-6" 31'-0" 16" 25,000 2,500 25,000 5,000 10'-6" 38'-9" 18" 30,000 3,000 30,000 6,000 10'-6" 46'-6" 20" 40,000 4,000 40,000 8,000 12'-0" 47'-3" 24" 50,000 5,000 50,000 10,000 12'-0" 59'-6" 24" 60,000 6,000 60,000 12,000 13'-0" 60'-6" 24"

Plate spacing and orientation may vary depending on site conditions. Custom sizing is available. Consult Highland Tank for Series G & J sizing information.

Length

Flanged Manway & Cover with Gauge Port2" Diameter Interface & Level Sensor Pipe4" Diameter Oil Pump-Out Pipe

Flanged Inlet Pipe Lifting Lug

Gravity Discharge Option Shown

Wear Plate

Corella® ParallelPlate Coalescer

Sludge Baffle

Petro ScreenCoalescer

StrikerPlate

OUTLETINLET

Flanged Outlet Pipe

UnderflowBaffle

Velocity HeadDiffusion Baffle

Vent Fitting

Dimensions

Cylindrical OWS

Engineered Design Options

Trickle Filter Media

Diffusion Pipe

Long term reliability and service is the goal of every company that provides products that serve to protect our environment. Since 1996, Highland Tank has supplied one of the world’s largest truck fleets with a variety of oil/water separators to help them protect and grow their business.

In the first year of our long-term partnership, we delivered a 1,000 gallon 100 GPM underground oil/water separator for a truck service and maintenance center. Since then, we have provided over 125 units in various sizes, flow rates and designs to accommodate the specific needs of a particular site.

Product Dependability for Vehicle Maintenance

The trucking company currently operates and services about 160,000 vehicles from maintenance facilities all over North America. They utilize the oil/water separators to treat oily wastewater generated by normal operations in their vehicle maintenance garages and truck wash facilities.

Highland Tank’s variety of engineered designs helps them protect the environment and meet regulations at a multitude of locations with unique site-specific needs.

In addition to our extensive line of standard model separators, we also offer several engineered designs to accomodate site-specific needs and applications. Each of these special models incorporates a unique feature to process wastewater and provide an extra, special operation.

Integral Sand Interceptor Compartment

PumpControlsand Rails

Pumped Discharge

BulkheadEffluentDischargePump

Oil Skimmer Side Oil Storage Compartment

Oil Pump-out Pipe

Our J-Series separators include an effluent pump-out chamber with submerged pumps and level controls for applications where gravity flow out is not available. Effluent can be pumped to drains or to another additional treatment such as Highland’s Advanced Hydrocarbon Filtration System.

Some applications require the separated oils to be removed from the separator on a continuous basis. For these situations, Highland Tank offers the S-Series units with an integral side oil compartment. Oils are skimmed from the water’s surface into a separate chamber for automatic or manual removal.

To filter and treat the effluent even further, Highland Tank offers the TF-Series model separator that employs specially packaged filters that process and polish the effluent as it trickles through the filter media before being discharged via gravity flow from the separator.

Most recently, we delivered a 2,000 gallon underground double-wall model HTC separator to Santa Fe Springs, CA. This unit is capable of processing wastewater at flow rates up to 200 GPM.

Our nearly 20 years of association and continuous supply of oil/water separators for the company’s maintenance facilities demonstrates their trust in Highland Tank.

In addition, their confidence in our products to provide dependable service has been proven over and over again by their continued installations at service centers.

G-Series separators include an integral sand/grit interceptor compartment ahead of the primary separation chamber to capture and retain larger, heavier solids on the bottom of this chamber.Removing these particles early in the process reduces potential clogging and improves the separation process.

Highland Tank's systems approach for providing wastewater treatment solutions goes well beyond simply supplying an oil/water separator. Our ability to custom fabricate separators for both underground and aboveground applications and supply them with all of the additional components needed through start-up is unparalled in the industry.

Our accessory line is designed to augment the wide selection of wastewater treatment systems we manufacture making it quick and easy to efficiently turn any of our separators or interceptors into a complete operating system.

All components arrive at the job site ready to install, reducing or eliminating construction delays. Our extensive line of systems components include:

• Monitoring sensors for leak detection and level sensing

• Alarm and control panels

• Complete anchoring systems

• Grade level manways

• Pumps for influent and effluent

• Insulation systems and heaters

• Access ladders, stairs, platforms and walkways

The knowledgeable and helpful staff at Highland Tank is readily available to help take your next project from concept through construction and into service.

Concrete Deadmen Anchors

Monitoring Sensors

Alarm & Control Panels

Access Components

Pump Systems

Thermal Insulation

Grade Level Manways

Complete Systems Solutions

Polyester Hold Down Straps

Stoystown, PAOne Highland RoadStoystown, PA 15563814-893-5701

Manheim, PA4535 Elizabethtown RoadManheim, PA 17545717-664-0600

Watervliet, NY958 19th StreetWatervliet, NY 12189518-273-0801

Greensboro, NC2700 Patterson StreetGreensboro, NC 27407336-218-0801

Lebanon, PA2225 Chestnut StreetLebanon, PA 17042717-664-0602

Friedens, PA1510 Stoystown RoadFriedens, PA 15541814-443-6800

© Highland Tank – HT – 2020 – 7/2014

Proudly made in America

Web: www.highlandtank.comEmail: wastewater@highlandtank.com