Water Treatment and Filtration

From drinkable (or potable ) water to high-velocity concrete demolisher and back again. Our water filtration service reduces costs and inconveniences to contractors and customers and protects the environment.

Depending upon the location, disposal requirements will vary, so water must be treated before it is released. For reuse in the hydrodemolition process, recycling is necessary because high-pressure water pumps and nozzles are extremely susceptible to wear from abrasive materials in the water.

To those ends, Rampart Hydro provides treatment and filtration services as part of complete hydrodemolition solutions and as a stand-alone service, too. To reduce total consumption and discharge, we can vacuum (or otherwise capture) wastewater and recycle it onsite. Recycling can be accomplished with large settling tanks, flocculants, or specialty filtration equipment, which we can supply.

For hydrodemolition, potable water is usually supplied via tanker truck or fire hydrant, but with consumption rates that range from 8,000 to 30,000 gallons a day, it may be economical and necessary to recycle wastewater rather than deliver that volume of fresh water on a daily basis.

After hydrodemolition, wastewater will contain suspended solids (slurry), which are primarily cement particles. Those particles give the water a milky white appearance and increase the pH to 10 – 12, which is above the normal pH of water of about 7.2.  If pooled or coarsely-filtered, larger, heavier cement particles will settle-out quickly. At that point the water can be further recycled, depending upon its intended use.

While closely related to water recovery and control, treatment and filtration is the next step, and customers and contractors have a variety of recycling solutions available to them, including: multiple settling tanks, storage tanks, pH balancing services, and filtration and flocculating equipment.

Cleaning wastewater so that it can be used again for hydrodemolition is more expensive than simply treating it for disposal, but it is the most economical option when:

  • Water is scarce and therefore expensive, which happens on remote job sites where the tapping of lakes and streams is prohibited or requires excessive treatment to use.
  • Water is not available because of a drought emergency. Water restrictions can eliminate all non-crucial uses of municipal, well, or other potable water sources.
  • It may be required by the EPA due to discharge requirements.
  • Wastewater treatment plants will not accept new discharges because of, say, capacity limitations or delays in permit issuance.

Automated Vacuum-Filtration System (AVS®)

The AVS uses a vacuum drum filter and diatomaceous earth. It requires less space than an elaborate settling tank, sand filter, and pH treatment/storage tank option, which it replaces.

The unit uses a continuously renewing filter of diatomaceous earth (DE) which can filter down to half a micron. A Vacuum drum is “loaded” with the DE cake and then fed wastewater at a rate determined by the quality of the wastewater. The drum sits partially submerged in a pan of wastewater which is pulled up onto the drum by the force of the vacuum being applied to it (the drum). As the DE cake is loaded with concrete, a blade cuts off the filter media thus renewing the filter. The unit runs until all the water is treated or the cake runs out and needs to be reloaded.

It is important to note that:

  • The vacuum actuated blade cuts off the filter media and dried concrete.
  • The dried concrete waste can be disposed of with regular construction debris.
  • The recycling unit requires a surge tank to store wastewater during peak discharge while the treatment process is underway.

Large-Scale Water Recycling

Depending on the scale of the project and desired production rates, recycling systems can be large or small.

To be efficacious, filters, settling tanks, and flocculation tanks must hold the dirty water for a period of time. While it is possible produce as  much as 48 gpm, for big projects that consume a lot of water, it is often necessary to include large treatment or surge tanks.

             Going Green

Rampart Hydro Services is rapidly becoming the Hydrodemolition “Going Green” industry leader  by introducing it’s Automated Vacuum Filtration System! Our goal is to make the hydrodemolition process more environmentally friendly by filtering, treating and recycling waste water. The AVS will allow Rampart to reuse the treated water back through the Ultra High Pressure Pumps greatly reducing the amount of water needed for operation, saving money and natural resources for future generations

  • Removes suspended solids (TSS)
  • Reduces PH to between 5 and 9, safe for discharge
  • Environmentally friendly diatomaceous earth for filtration
  • Self contained and portable, No site impact

Specifications

  • Large Filter Media Drum
  • Self Contained Power Unit
  • 3000 Gallon Slurry Tank
  • 500 Gallon PH Reducing Tank
  • Filters and Treats 3,500 Gallons Per Hour
  • Liquid slurry converted to dry solids
  • Disposal costs reduced
  • Used Filter Media Is Suitable for Landfill