Savings on fertilizers
She also points out that as well as the ‘push’ factors, there are also benefits for growers when it comes to recycling water: “The good news is that there is also a financial case for reduction in water and fertilizer use by using recirculation technology, particularly in these times where fertilizer is hard to get hold of and very expensive. An added side benefit will be helping to ensure longevity of crop protection agent use.”
“A good percentage of new primary supply is still necessary because the balance of the fertilizer used by the crop needs to be refreshed,” points out Kathryn. “Recirculation technology can be used on any growing system but the more water that has to be treated then the bigger that system needs to be. The main options include thermal disinfection, ultra-filtration, ozone and UV disinfection and there are pros and cons for each technology.”
Approved by Wageningen University
Priva has developed products using UV disinfection which has a relatively inexpensive operational expenditure, no harmful chemicals or toxic by-products, and a highly controlled process with multiple safeguards and feedback to the customer. “The products have been independently tested with Wageningen university and Priva can advise on the level of dose required for each crop,” adds Kathryn.