The waste company has plans for a site on Swansea Enterprise Park.
A waste company is appealing against a Swansea Council decision to reject plans for an incinerator in Llansamlet.
Biffa Waste Services hoped to build the facility at its site on Swansea Enterprise Park.
They said 21 thousand tonnes of non-hazardous waste each year would be processed there and recyclable materials were removed.
What was left would be burned, generating electricity and minimising trips to a landfill site in Merthyr Tydfil.
But the application was unanimously rejected by the council's planning committee in May this year.
Objectors to the scheme said they want the planning appeal to be in the form of a public hearing so they can voice their concerns.