Four silos have been damaged in a fire at the Produce World Group site in Swinderby, near Lincoln.
As previously reported, firefighters were called to the site just after 5pm on Tuesday, February 23.
Five crews attended the large fire, with the smoke visible from North Hykeham and even Retford.
By 7.30pm, firefighters dampened down the blaze and only two crews remained on site.
Shortly after 10.30pm, Lincolnshire Fire and Rescue said it had fully extinguished the fire using three main jets, the aerial ladder platform as a water tower, and three thermal imaging cameras.
Fire investigators said the cause of the fire was accidental, due to “contractors using equipment in close proximity to plastic filters.”
A large quantity of plastic water filters have been damaged by the fire, as well as heat damage to a steel clad silo.
There was also heat damage to a further three silos.