Up to 500 people are expected at a march against a planned waste plant.
But the developers of the plant claim its impact is being exaggerated by protesters.
Saturday’s march has been organised to show residents’ anger at Drenl’s plans to build a waste gasification plant in Gretton Brook Road, Corby.
Corinna Milligan, whose partner Lee Forster staged a sit-in at the proposed site, said they were expecting about 500 people on the march.
All the Parliamentary candidates for Corby are also expected to attend.
But Drenl said claims about the adverse impact of the plant have been exaggerated.
A spokesman for the firm said: “We wish to re-state a number of facts about our facility.
“Drenl’s facility is located at the Gretton Brook industrial estate; it is being built on 2.2 hectares of land that currently houses an industrial building and an inert waste recycling facility. The estate also houses other industrial units and warehouse buildings. Drenl is not building its plant on land at Brookfield Plantation.
“Once operational, Drenl’s facility will process just 5.5 per cent of Northamptonshire’s annual waste: 120,000 tonnes per annum. Given the facility’s size, we expect to receive about 20 HGV deliveries – not the 500 HGVs per day as some people are falsely suggesting.
“It is and always has been our intention to source the waste from as close as possible to the facility: there is no financial incentive to transport waste from long distances given the extra cost to do so.
“The scheme will generate electricity for up to 18,000 homes and could provide heat and energy to commercial units in the near vicinity.”
Drenl hopes the plant will open in 2017.
The march will leave from outside the Saxon Crown pub at midday and walk to Corby Cube, and the protesters have agreed to wear green.
More than 2,000 people have signed an online petition against the plans.