WSI International
WSI International
Wastewater Treatment and Equipment

Produced and Frac Water Treatment


WSI International offers over ten years of combined experience in treating different waste streams from Oil and Gas. Combined with our skilled engineering team, we deliver cost-effective and easy to operate equipment that guarantees efficiency and durability.

Designed and built by an engineering team that has demonstrated its expertise over different equipment design projects, you can be sure of getting Oil and Gas Treatment equipment that is unbeatable in effluent quality and reusability.

So, whether it's a temporary site or a fixed installation, our team is on hand to deliver customized treatment equipment tailored to your needs.

We treat oil and gas
wastewater from the
Bakken to the Eagle Ford.

WSI can build custom equipment for any oil and gas operations. Our entire engineering team has personally worked, designed and operated at energy sites around the world.

Our systems are reliable and have an unbeatable track record for effluent quality and reuse. They can be remotely controlled and operated with minimal supervision.

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Frack Water Treatment Site

Temporary Sites 

WSI's equipment has been designed on skids and trailers to allow rapid deployment to the field. The modular units can be configured for site-specific requirements and assembled in under a week. All equipment is Class I Div II rated.

Produced Water Treatment Facility

Fixed Installations

Our equipment has everything a new build or existing facility needs from controls to pumps. Our skids come prewired and ready for use when they arrive at the treatment facility. Each unit is thoroughly tested at our facility in Colorado. 

Our Equipment

Frack Water Treatment DAF

Dissolved Air Flotation (DAF)

Our R-75OG DAF Systems have been designed from the ground up to treat heavily contaminated water from energy and mining operations. Each DAF is fitted with controls, instrumentation, influent pumps, effluent pumps, sludge pumps, and a coagulation system. Each unit can treat 10,000 barrels of produced water a day. Multiple units can run in parallel for higher capacities.
Oil and Sludge Treatment Press

Belt Press 

WSI belt presses are designed for heavy mud and sludge applications. Our presses are a perfect fit for Oil and Gas Operations. They come skid mounted and can recycle water from the DAF to wash down the belt. They can operate as a complete stand-alone unit, to dewater at multiple sites. Each belt press come pre-assembled  and tested. They are capable of treating 7 barrels a minute of sludge.
Mobile Frack Treatment Module

Mobile Modular Units

Our module system offers a complete solution to any Oil and Gas wastewater stream. They are prefabricated and ready to deploy. Most configurations have a chemical treatment module, DGF/DAF module and a dewatering module. They can be rearranged on the fly, depending on the treatment requirements. Each module has integrated control that intelligently "talk" to each other to optimize effluent quality.
Oil and Gas Remote Control

Remote Controls

Access your WSI packaged DAF or modular system from anywhere in the world using a mobile device, computer, or tablet. Adjust settings on the fly or gather analytics for compliance, the possibilities are endless with our remote access technology.

Our Process

Frack Water Treatment Process

Custom Solutions for
​Custom Problems

Each Oil and Gas wastewater stream is different and requires special analysis and expert scrutiny. Contact us and our team of environmental, mechanical and systems engineers will come up with a custom solution to your project.

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Core Produced Water Treatment Technologies

Chemical Treatment

Chemical Treatment Module

The chemical treatment assembly is comprised of a baffled mixer frac chassis. The tank consists of three separate chambers with an enclosed equipment skid with controls mounted at the front. Below is a bulleted break down of the equipment. 

  • 415 BBL Mixer Frac Chassis: A custom-built 415 BBL frac chassis modified for the equipment listed below. 
  • Lime Slurry Storage: 143 BBL minimum lime storage chamber will be provided. The lime storage chamber will have a 10 hp dedicated mixer to keep the hydrated lime in suspension. The chamber is sized to receive standard bulk loads of hydrate lime slurry (4,400 gallons) while maintaining sufficient volume for ongoing operations. 
  • Primary Reaction Chamber: 200 BBL primary reaction chamber equipped with two 10 hp mixers and equipment necessary to maintain target pH for iron and scalant precipitation. 
  • pH Neutralization Chamber: 25 BBL neutralization chamber with mixer and the necessary equipment to bring the pH back to neutral or desired target pH. This chamber is also equipped for biocide and oxygen scavenger injection before impoundment of recycling water. 
  • Equipment Skid: The equipment skid is integrated into the front end of the mixer frac tank chassis.
Chemical Treatment Module for Produced Water
Solids Removal

Dissolved Gas Flotation Unit (DGF) (DAF)

The WSI R-75OG DGF is a rectangular body unit with two flotation zones. Each zone can separately treat different processes. The body is built and fabricated from 304L SS. Below is a list of several key benefits with this design. 

  • Stainless Steel Tank Design: The tank body, will be constructed from 3/16” stainless steel plate. The body is constructed with three independent cone bottom collection hoppers with the pneumatically operated valve connection point. All process chambers of the R-75OG DGF unit are fabricated into the system. This includes: Two DGF floatation zones, scum collection hoppers with a rail system, and effluent weir chamber. 
  • DGF Pump: The KTM-65S2 pump is a high flow micro-bubble generator made from 316 stainless steel. The KTM-65S2 is a highly precise pumping mechanism that generates microbubbles by utilizing two hydro-dynamic principles: negative pressure sucking both nitrogen and water simultaneously from each port; nitrogen effectively mixed into the water; which properly produces pressurized nitrogen-enriched discharge. This eliminates the need for a large saturation tank. 90% of the microbubbles formed are less than 10 µm in diameter. The R-75OG DGF uses a patented nitrogen system to reduce oxygen in the process. 
  • Saturation Tank: The saturation tank is constructed from 304L Schedule 10 pipe and is designed and fabricated in such a way that coarse bubbles from the nitrogen enriching process are collected and discharge into the DGF effluent chamber. This prevents coarse bubbles from disrupting the sludge blanket that is formed in the floatation zone. 
  • Micro Bubble Distribution: The Microbubbles generated from the KTM-65S2 pump system are dispersed into the DGF by six precisely located white water injectors. These injectors are constructed out of 1.5” schedule 10 304 stainless steel pipe. These pipes run the width of the DGF and have a proprietary grooved design opening for proper distribution and enhanced flocculation. Each injector has a diaphragm valve that will allow the operator to dial in the precise distribution of white water. 
  • Recycled Process water: The recycled process water used for the microbubble generation process comes from the same zone where the effluent weirs are connected. This ensures that the cleanest quality of process water is being recycled into the system. 
  • Surface Skimmer System: The skimmer system is comprised of two parallel lengths of ultraviolet stabilized glass reinforced Nylon 6/6 chain with stainless steel paddles and buna rubber wiper assemblies. The skimmer system is powered by a helical worm gear motor that is VFD controlled. This allows the operator to have precise control over the speed at which the paddle skims across the top layer of the DGF. This is important as to not disrupt the gentle nature of the sludge blanket that is formed in the floatation zone of the DGF. The paddle is the width of the DGF body and gently pushes the skimmed sludge up a stainless steel beach and into a collection hopper. The ends of the stainless steel paddles are supported by UHMW blocks which ride on internal rails. This allows the paddles to interface the sludge blanket at a consistent elevation along the length of the DGF and gently collect the thickened sludge, pushing it into the sludge hopper.
Solids Removal Module for Produced Water

Dewatering Module

The dewatering skid scope includes engineering and equipment supply for a complete, operational skid-mounted 1.5-meter belt filter press. The press frame will be fabricated from steel square tube that provides the press maximum strength with a minimal deflection for optimum belt life. The skid is fabricated from structural I-Beam for ease of mobilization with tail roller trucks. A steel frame building with metal sheet siding and insulation is secured to the skid ensuring that the press and its ancillary components are completely enclosed and protected from the elements. Below is a bulleted break down of the scope of the supply. 

  • Skid Fabrication: Tail roller skid with bull bars 
  • Building Enclosure: Metal frame building, with insulation and heating. 
  • 1.5M belt press: 
    • Upflow feed box with paddle driven sludge distribution system, 
    • Extended gravity deck with sludge plows (chicanes) to corn roll the sludge and open free water to the belt for ease of draining 
    • Pressure section with dual drive motors (upper and lower) in VFD controlled torque share operation to eliminate belt looping and creasing while processing binding sludge 
    • Major Ancillary Equipment: To support the remote field dewatering operation the system includes:  
    • Influent sludge feed pump 
    • Sludge Flow Meter to closely control polymer dosing 
    • Polymer system 
    • Dewatered cake loadout screw conveyor  
    • Filtrate return pump (to primary reaction tank) 
    • Wash water booster pump (from neutralization tank or DAF Effluent) 
    • Air Compressor for belt tensioning system 
    • Pneumatic control panel 
    • Electrical control system 
Dewatering Module for Produced Water

Our Clients

We've worked with small local producers to international companies. We offer solutions that cover all budgets.