The public inquiry into Peel's proposed Barton Renewable Energy Plant started on Tuesday.
The energy-from-waste incinerator was refused planning permission by Trafford Council in November 2011. Some local residents object to the plans on air quality grounds.
Jon England, Peel Energy project manager, said: "Peel Energy considers that the independent public inquiry is an appropriate forum for the issues to be examined in an impartial and objective manner by a planning inspector.
"Planning committee members refused the application in November 2011 against the advice of planning officers at the Council who recommended that the proposal should be approved.
"No objections to the planning application were received from any of the professional consultees which were consulted by Trafford Council. Those consulted included the Health Protection Agency, NHS Trafford, the Environment Agency and the Highways Agency."
The inquiry is scheduled to run for 10 days.