WINDROW COMPOSTING OF BIODEGRADABLE PACKAGING MATERIALS

The disintegration of Biopol-coated cardboard, polylactide fabric and film was studied using three different procedures: adding the samples directly to the compost pile, and placing them in the pile in nylon ba gs as well as in steel frames. Cellulose-based sausage casing, polyeth ylene and Mater-Bi ZFO3U were also tested in steel frames as reference samples. Direct addition of the samples to the compost pile had no de trimental effect on the decomposition of compost biowaste. The use of steel frames proved to be good a method for testing samples Like packa ging materials. Both polylactide samples and Biopol-coated cardboard d egraded completely in the steel frames. The results showed that compos ting activity parameters should be followed during composting before a ny conclusions can be made about the compostability of the samples. Th e compost produced from the polymer samples showed no toxicity in the plant growth test with barley and radish seeds performed at the end of the experiment.