Low density polyethylene/linear low density polyethylene blend film and polyethylene terephthalate sheet incorporated with pro-degrading additives from Symphony Environmental Ltd., Wells Plastics Ltd., and EcoLogic LLC were evaluated in an anaerobic digestion environment for 16 months together with negative (blank) and positive controls (cellulose) in general accordance with ASTM D5526-12. Total biogas production of cellulose was significantly higher than that of the remaining samples. Total biogas production of samples containing plastics and the negative control were not significantly different from each other. Pro-degrading additives tested in the study did not increase the biodegradation of these plastic materials.
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