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The present study aimed to track the changes in microbial communities during home composting of biodegradable plastic products (PLA). 6 waste mixtures and controls were prepared, with C:N about 30, placed in containers. The amount of PLA compared to the compostable mixture is 1%. Different depositing methods were used - active composting and placing part of the material in biodegradable bags. Temperature, humidity, pH, C:N ratio were measured. The amounts of bacteria, actinomycetes, micromycetes were recorded duri...