Reverse Osmosis (RO) for Industrial Wastewater

Reverse Osmosis, also known as RO, is commonly used for industrial water purification. High pressure water is passed through either thin film composite or cellulose acetate membranes, producing high quality water suitable for all rinses. However it is important that the water is pretreated to protect the membranes from mineral scaling, organic fouling, and chemical degradation. It is also important that a complete cation/anion balance and potential contamination are identified before considering Reverse Osmosis treatment.

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Reverse Osmosis

Reverse Osmosis
Our Small to Medium Volume RO Systems are designed to purify 275 to 11,400 gallons per day of water reliably and at an affordable price.

Industrial RO Applications

  • metal finishing and plating operations
  • printed circuit board and semiconductor manufacturing
  • electroplating processes
  • automotive manufacturing
  • cleaning and painting
  • food and beverage
  • reuse and reduction of BOD prior to discharge
  • groundwater and landfill leachate
  • removal of salts and heavy metals prior to discharge

Total System Capability RO Systems

Large Volume RO Systems
Our Large Volume RO Systems are designed to purify 18,000 to 270,000 gallons per day of water reliably and at an affordable price.
  • Ultra-low-pressure membranes – reduce power consumption by 30% or more
  • Membranes – alternate membranes including nano-filtration (NH), seawater (SW), cellulose acetate (CA) and softening membranes are available
  • Two-pass RO – produce ultrapure water at low cost
  • Pretreatment equipment – filters, softeners, chemical feed systems, UV sterilizers, ultra-filtration (UF) and microfiltration (MP) systems are available to prevent scaling and fouling the RO membranes
  • Post-treatment equipment – degasifiers, chemical feed systems and UV sterilizers are provided to assure that the product water is within specifications
  • Deionizers – polish the RD product water to meet application specifications including ultrapure water

Pure water technology

We offer complete system capabilities including evaluation and design services, state of the art equipment utilizing membrane and ion exchange technology and expert field service.

Standard Reverse Osmosis System Features

  • Modular systems can be expanded to meet future requirements
  • Systems can be adapted to almost any plant layout
  • Liquid filled gauges assure pulse-free readings and long gauge life
  • Line-mounted flow meters
  • Computerized system design
  • Rotary vane pumps, the industry standard for trouble-free service, efficiency and corrosion resistance
  • Pressure relief valves
  • Custom Control systems
  • Needle valves for precise flow and pressure control
  • All gauges, meters and controls are mounted next to the control panel for ease of operation
  • Feed-water solenoid valve, shuts off feed-water when system is not operating
  • Low-pressure switch, protects the pump from cavitation and damage caused by inadequate inlet pressure

RO & DI Water Purification Systems

Anodizing RO - DI - Water Purification

Water Purification Schematic Flow Process

There are various water polishing schemes to purify water. Met-Chem will engineer the most cost-effective way to reach the purification level you are targeting. 

In the diagram above, city tap water is run through the Activated Carbon Filter, and it will remove organic compounds found in water. This will prevent microbial fouling in the Reverse Osmosis System.

The water is then run through the Water Softener. This will protect your Reverse Osmosis System by removing scale-forming elements such as calcium that cannot be removed by the activated carbon filter.

The Reverse Osmosis System creates a very pure form of water. Reverse Osmosis is a water purification process that uses pressure and a semi-permeable membrane to remove dissolved solids. The RO water is stored in a holding tank.

If the RO water needs more purification, a Deionization System will reduce the conductivity of the RO water. The deionizer will remove trace minerals and charged ions from the RO Water. In the diagram, the RO water is recirculated continuously through the Deionization System where it can be used for rinses and make-up water.

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