Study on application of soil bacteria Bacillus licheniformis and activated sludge bacteria
in biodegradation of cellulose and cellulose containing films
Polimery 2007, No 3, 210
Activities of Bacillus licheniformis bacteria and activated sludge bacteria in the processes of biodegradation of polymer films (PE or biodegradable synthetic resins) modified with cellulose, and for comparison pure cellulose, were studied. The degree of biodegradation (catabolytic bacteria activity) was estimated on the basis of kinetics of denitrification process [equations (1) and (2)] accompanying biodegradation (Fig. 1-3) as well as on the basis of strength properties deterioration (Table 1, Fig. 9-10), weight loss and biomass growth (Table 1, Fig. 4) and also changes in the film structure and surface morphology (Fig. 5-8, 11 and 12). It was found that both types of bacteria used caused biodegradation of the films discussed and decomposition degree depended on the type of polymer modified and only slightly on the type of microorganisms used. It was confirmed that denitrification process let realize biodegradation of polymeric materials modified with cellulose. It can be also useful for evaluation of their ability to be organically recycled via composting.
Key words: cellulose, polymer-cellulose films, biodegradation, denitrification, denitrification bacteria
N. Czaja-Jagielska, F. Domka
Study on application of soil bacteria Bacillus licheniformis and activated sludge bacteria in biodegradation of cellulose and cellulose containing films