The award-winning Cascade system circulates water automatically while improving product quality and reducing the risk of bacterial cross contamination because the potatoes are washed in constantly recycled, clean, chilled water. Sand and soil washed from the potatoes is filtered out to be sold.
It has been running at the Cambridgeshire site for a year and forms part of the company's Green15 initiative, which aims to reduce its water use by 50 per cent by 2015. The system will be rolled out to its Duns site in Berwickshire later this year.
Water use in the field has also been cut by the introduction of a "little-and-often" static mini-sprinkler system, which is also said to improve size uniformity and reduce risk of common scab.
Ewan Stark, head of agronomy at Greenvale's Duns and Burrelton sites, said: "As well as being incredibly easy to manage, the system saves water as there is less run-off from the fields and less water lost through evaporation."
The company has also gained health and safety certificates for all five of its main processing, manufacturing and storage sites.
Its Burrelton site was awarded the Occupational Health & Safety Management (BS OHSAS) 18001 certificate last month.
It also achieved the ISO 14001 certificate for its environmental management system, which requires systems to be in place to reduce water and energy use.
The company has also relaunched its greenvale.co.uk website, making the segmentation of the business clearer to users.
Last month, Greenvale's parent company Produce Investments announced a pre-tax loss of £1.3m for the second half of 2012. It blamed "the lowest-yielding and poorest-quality crop since 1976".