Having recognised the need to reduce running costs and make cooling tower systems more environmentally efficient, the updated OASIS units can support the reduction of water consumption and costly effluent discharges. Designed originally to recycle waste water from evaporative cooling towers, the advanced model can also be used to recycle waste water from Reverse Osmosis (RO) water purification units used in a wide variety of applications including pharmaceutical process water, renal dialysis and beverage production.
Cooling towers serving air conditioning systems are usually the largest water user in a building. A typical cooling system in a moderately sized modern building with a heat rejection capacity of 10MWt will evaporate approximately 14,000 litres per hour on full load whilst also discharging 5000 litres/hour waste water to drain.
A typical Renal Dialysis RO unit producing 10 m3/hr of purified water will discharge 4m3/hr to waste. Using a SOCOTEC OASIS unit approximately 60m3/day could be recycled, equal to or better quality than the mains water supply.
Nick Harper, operations director, Environment & Safety, SOCOTEC, commented: “Our OASIS units continue to prove a powerful option for reducing water consumption and effluent discharge, improving environmental sustainability in commercial and industrial applications. As well as being economically and environmentally beneficial, clients using OASIS units within larger cooling tower systems tend to see the greatest return on investment, as there is a shorter payback time. Such savings also contribute significantly to any new buildings environmental IPPC assessment rating as well as the overall company’s worthwhile commitment to reduce water consumption and waste.”