A council says its new fleet of hi-tech refuse lorries will spearhead a waste collection scheme and make "the least possible environmental impact".
Ceredigion council's seven Mercedes Benz trucks have cost £156,000 each.
The authority is replacing some weekly refuse collections with a fortnightly scheme to help hit collection targets.
Under the new scheme, household waste will be collected every two weeks, while food and recycling will be taken away every week.
Council leader Keith Evans said the lorries would also be better for the environment.
The council said the trucks had cost a total of more than £1m, and they were paid for by a combination of grants, including one from the Welsh Assembly Government.
Mr Evans said: "The new fleet is amongst the most technologically advanced available and will make the least possible environmental impact."
The waste collection changes are a response to assembly government refuse targets.
Local authorities breaching them can be fined, and officials in Ceredigion said that could be as much as £1.4m by 2020 if changes were not made.
It is estimated that landfill sites used by Ceredigion council could be full within the next 12 to 15 years.