This website outlines alot of information for Environmental grant funding in Wales ~
GreenDragon
It is available for any business sector ~ BUT I am not sure of the criteria necessary ~ if you have a project underway that possibly includes water recycling and innovative use .. you could ask for some guidance ~
CONTACT YOUR LOCAL UNIT ~ or indeed send them a general enquiry to ask how you may be able to take advantage and make an application from this excellent environmental funding organisation !
Good luck ~ and don't forget to let us know