The developers can appeal the decision.
Kildare County Council has refused plans for a major biomethane plant near Castledermot.
European firm CycleØ Group had sought permission for an anaerobic digestion facility at Ballyvass, but the Council has turned it down.
Ecological concerns had been highlighted during the process, including potential risks to rivers, wetlands, and protected species.
Local residents had voiced strong objections, while the company insisted it would meet all environmental requirements
The developers can appeal the decision to An Coimisiún Pleanála.

Setback For Monasterevin Fire Station As Site Sale Falls Through
Transport Users ‘Overwhelmed’ By Multiple Apps, Says TD
Kildare County Council Says "No Excuse" For Dog Fouling - But Won’t Provide Bag Dispensers In Maynooth
Government Moves To Let Gardaí Alert Schools After Domestic Violence Incidents
Aerosol Misuse In Kildare Raises Fears Of Sudden Death Risk Among Teens
New Housing Plan Could See Kildare County Council Bidding Against First-Time Buyers
Remembrance Service For JoJo Dullard: Parish Marks Three Decades Since Disappearance
Naas Special School Delay - 12 Children Promised A Place Still Not In Class