For over 25 years, Northern California’s expert provider of industrial wash and wastewater solutions to reduce, contain and treat water

Case Study: Valley Transit Authority

Multi-Stage Bus Wash WOS & ClearTreat System

US HydroTech custom designed this Water Oil Separator (WOS) & ClearTreat System for Valley Transit Authority's bus wash station. As always, the size, capacity and operating characteristics of each system was tailored to Valley Transit Authority's specific needs.

Encouraging people to reduce water usage and recycle with practical technology is easier than people may think. Using ClearTreat and WOS systems can provide savings for businesses while protecting the water resources within our communities. These simple solutions can save money and provide cost-effective ways to protect your organization's liability.

WOS & ClearTreat System Details

  • Valley Transit Authority (VTA) had the first full-scale hydrogen fuel cell bus station in the nation.
  • VTA has a full exterior and undercarriage bus wash that needs to handle heavy metals and oils and greases (FOG).
  • ClearTreat consists of Sodium Bentonite clay and select polymers. ClearTreat Reactant is an excellent choice for removing oils, greases, and metals found in most wastewater streams. ClearTreat systems are designed for low-flow, high-loading waste streams, which allows the system to work with little to no dilution. It is a one-step dry reactant that renders sludge non-hazardous.

How the System Works

Wash water is processed through two systems that are located in the bush wash facility. The exterior wash water is pumped through a Water Oil Separator. The ClearTreat is used to process the degreasing water and backflush water from the exterior wash. Both systems together provide a complete wash water management solution.

When ClearTreat enters the waste stream, it releases a dry acid which causes the oil to coalesce and separate from the wastewater. The polymer attracts and entangles oil particles and draws the clay into the entangled mass.

Next, a dry base is released, causing the metallic hydroxides to precipitate. The polymer, with its entangled containments, is attracted to the ClearTreat. The oils and metals bond into the interior of the ClearTreat platelets, locking them in. The ClearTreat then starts to gather in larger clumps, creating a floc.

Once the ClearTreat has completed its process, the mixture of ClearTreat and the wastewater is processed through a separation media. The ClearTreat, which is now a flocculent, separates from the water. The flocculent emerges in the form of sludge which, in most cases, can be managed as a non-hazardous waste. The treated water is now ready for reuse or discharge.

US HydroTech customizes recycling and treatment systems for transportation hubs and many other types of industries. Contact us to learn more about systems that could help your organization reduce, treat and contain wash water.