The patented variable frequency drive (VFD) 2 pass reverse osmosis technology offers unique benefits to render the technology GREEN.
The VFD automatically controls 2 modes of operation which are the “production mode and the “recycle/cleaning mode”. The production mode produces purified water to a point or points of use. The recycle/cleaning mode of operation recycles the water back to the purification process when the system is not called upon to produce water at point/s of use. This mode produces an environment within the purification process and delivery system to clean the membranes and to create an environment which is not conducive for the growth of microorganisms throughout the entire purification and delivery system. The concept is to use the water immediately after purification. To REDUCE the total water consumption, water that is not used is RECOVERED. RECYCLED and RE-PURIFIED to maintain the water quality for REUSE.

The GREEN benefits are:
Saves electrical energy during purified water production. The VFD controlled pump will only consume enough electrical energy to produce the required water volume at point/s of use. As the draw off demand increases the VFD ramps up the production rate by increasing the pump flow and pressure.
As the draw off demand decreases at the point or points of use the variable frequency drive decreases the revolution per minute of the pump motor which decreases the electrical load thus saving on electrical energy and costs.

Saves electrical energy during the recycle/cleaning mode.
When the system is not called upon to produce water at point’s of use the VFD further reduces the electrical load which saves on electrical energy and associated costs. This lower energy recycle/cleaning mode will maintain the purification system in a clean and a high microbial pure state.

Saves water during the production mode.
High recovery rates (80- 98%) of water can be achieved to save on water consumption and feed water costs during the production mode. High recoveries will also reduce sewage or disposal volumes which will save costs since less reject water will be sent to drain. Saves water during the recycle/cleaning mode. High recovery rates (90-98%) of water are maintained during the recycle/cleaning mode since the majority of water is recycled back to the inlet of the purification process. This includes the majority of the first pass RO reject, the entire second pass RO reject and all of the product water.

Reduced cleaning frequency.
The recycle/cleaning mode reduces the frequency for cleaning of the RO membranes since the membranes are cleaned when the system is not called upon to produce water at point’s of use. Reduced cleaning chemical usage is gentler on the environment and reduces neutralization chemical usage.

Reduced sanitization frequency.
The recycle/cleaning mode reduces the frequency of sanitization. This mode creates an environment within the purification process that is not conducive for the growth of microorganisms that are typically found in high purity water systems. A chemically sanitizable system will use less liquid disinfectants and neutralization chemicals. A heat sanitizable system will require less fossil fuels or electrical energy.
GREEN design lowers operating costs.
Due to the simplicity of design the operating costs are significantly reduced. Reduction in operating costs of >20% is realized in USP Purified Water applications. Reductions of > 50% can be obtained in WFI applications.

Saves energy by not tempering the teed water.
Savings of 50% or greater in operating costs over conventional systems can be realized since the feed water does not have to be tempered to 25°C. The VFD
simply increases the applied membrane pressure to produce the desired production rate. In addition the colder operating conditions reduce the requirement for sanitizations due to reduced bioburden.

Self regulate its production rate under various water temperatures.
The VFD will save electrical energy by automatically regulate the production rate based on the demand at points of use and under varying feed water temperatures.

Fewer technologies lower costs.
Fewer technologies employed to provide the water quality reduces the initial environmental foot print and the ongoing operational environmental impact.

Environmentally friendly design.
Total resource load to produce the equipment is lower than conventional systems.

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