Anaerobic digestion and aerobic composting of rigid biopolymers in bio-waste treatment: fate and effects on the final compost
| Autor: | Francesca Bandini, Eren Taskin, Filippo Vaccari, Mariangela Soldano, Sergio Piccinini, Alberto Frache, Sara Remelli, Cristina Menta, Pier Sandro Cocconcelli, Edoardo Puglisi |
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| Rok vydání: | 2022 |
| Předmět: |
Environmental Engineering
Biochemical Methane Potential Renewable Energy Sustainability and the Environment Composting Polyesters Bioengineering Starch General Medicine Polylactic acid Soil Biodegradation Compostability Ecotoxicity Settore AGR/16 - MICROBIOLOGIA AGRARIA Anaerobiosis Waste Management and Disposal |
| Zdroj: | Bioresource technology. 351 |
| ISSN: | 1873-2976 |
| Popis: | Bioplastics may be collected in the bio-waste treatment, which is often composed of anaerobic digestion and subsequent aerobic composting of the digestates. The aim of this study was to evaluate the degradability of polylactic acid (PLA) and starch-based bioplastics (SBB) spoons under industrial conditions. Biomethane potential (BMP) was measured and biogas production was monitored, while the quality of composts was assessed by phytotoxicity and ecotoxicity tests. The bioplastics disintegration resulted in 65.1 ± 4.6 % for PLA and ≤ 65.0 ± 7.4 % for SBB, not achieving the target set by UNI EN 13,432 standard, and several residues were found in compost. Phytotoxicity tests on seeds reported the lowest Germination Index for PLA elutriate, whereas a potential negative effect of SBB on soil fauna was detected. Further investigation is needed to assess the fate of these ever-growing materials under industrial conditions, and also evaluate the effects of residues in compost. |
| Databáze: | OpenAIRE |
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