Abstract: Contaminated covered plastic waste material in the form of used Petri dishes, so-called agar plates, is rendered harmless and cleaned by placing the agar plates in a bacterium-tight heating chamber maintained substantially at atmospheric pressure and contacting them with water at an elevated temperature, preferably 90.degree.-98.degree. C. for a predetermined period of time. After the predetermined period the agar plates are rinsed with water which is then drained off through an outlet in the bottom of the heating chamber. The agar plates to be treated are loaded into the heating chamber in batches contained in bags wholly or partly consisting of a plastic material which is solid and substantially insoluble in water at room temperature but soluble in water at the elevated temperature.
Type:
Grant
Filed:
September 9, 1983
Date of Patent:
March 12, 1985
Assignee:
Assab Medicin AB
Inventors:
Lars B. Edebo, Harald G. Swede, Nils-Erik Tornqvist
Abstract: Contaminated plastic waste material in the form of used Petri dishes, so-called agar plates, is rendered harmless and cleaned by placing the agar plates in a bacterium-tight heating chamber maintained substantially at atmospheric pressure and contacting them with water at an elevated temperature, preferably 90.degree.-98.degree. C. for a predetermined period of time. After the predetermined period the agar plates are rinsed with water which is then drained off through an outlet in the bottom of the heating chamber. The agar plates to be treated are loaded into the heating chamber in batches contained in bags wholly or partly consisting of a plastic sheet material which is solid and substantially insoluble in water at room temperature but soluble in water at the elevated temperature.
Type:
Grant
Filed:
October 20, 1981
Date of Patent:
November 29, 1983
Assignee:
Assab Medicin AB
Inventors:
Lars B. Edebo, Harald G. Swede, Nils-Erik Tornqvist