Muck Off Acorn, the campaign group that has fought against the plant, said it had “succeeded” in warding off the application after “years of relentless work”.
The declaration came after it “received official confirmation” that the “threat of an appeal” being lodged by the company was no more.
The news that the firm still hoped to one day build the facility, has been disappointing to those that oppose the project.
“It’s really, really, disappointing, but not a surprise,” said Indy Wijenayaka, West Suffolk Council’s portfolio holder for growth and spokesperson for the group.
“But why didn’t they appeal it straight away if they feel they are strong enough and their application is strong enough?
“Why take the community through the anguish of a full process again, when we all know that it is going to have a detrimental effect on the whole area.”