Food waste from thousands of households will be turned into compost instead of going to landfill.
The change has come about for residents in Chesterfield, Bolsover and North East Derbyshire after a new treatment facility was opened.
Householders in these areas will receive letters from this week explaining the changes as well as caddies in which to collect their food waste.
The £6.65m composting facility in Arkwright, run by Derbyshire Council, can turn 40,000 tonnes of food waste into compost every year.
Coun Joan Dixon, cabinet member for economy, said: “The new food and garden waste recycling service is a major step forward in reducing landfill which costs the county council £17.383m a year.
“That includes landfill tax which costs Derbyshire taxpayers more than £1m a month.”