An investigation is underway at the former Sterecycle plant in Rotherham after another fire at the site last weekend.
It took six fire engines and 35 firefighters to put out the blaze. No one was injured.
South Yorkshire Fire and Rescue said about 2,000 tonnes of plastic was involved in the incident.
MRW reported how the Yorkshire recycling centre was shut down earlier this month, following news that two waste companies which took over the site from Sterecycle went into administration.
Earlier that year a man was killed in an explosion at the site, when Sterecycle operated an energy from waste facility there, causing it to suspend operations for three months.