Among the delegates on Friday was Dr Mary Jo Kurth, from clinical diagnostics company Randox.

BBC: Northern Ireland

Randox's factory is tucked away at the end of a bumpy country lane near Crumlin, a test tube's throw from Craigavon.

BBC: Northern Ireland

Randox laboratories - which is based close to the incinerator site - has said it is disappointed with the minister's decision to approve it.

BBC: Glenavy chicken litter incinerator is approved

Randox had previously warned it was concerned about possible contamination with dioxins and other chemicals and said it may be forced to move some of its production to County Donegal were the incinerator to go ahead.

BBC: Glenavy chicken litter incinerator is approved