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Article

Biodegradation of Bioplastic Using Anaerobic Digestion at Retention Time as per Industrial Biogas Plant and International Norms

1
Faculty of Sustainable Design Engineering, University of Prince Edward Island, Charlottetown, PE C1A 4P3, Canada
2
Lectorate Sustainable Production in the AgriFood Sector, HAS University of Applied Sciences, Onderwijsboulevard 221, 5223 DE ’s-Hertogenbosch, The Netherlands
*
Author to whom correspondence should be addressed.
Sustainability 2020, 12(10), 4231; https://doi.org/10.3390/su12104231
Received: 24 March 2020 / Revised: 7 May 2020 / Accepted: 19 May 2020 / Published: 21 May 2020
(This article belongs to the Special Issue Circular Economy and Sustainable Strategies)
Bioplastics are gaining interest as an alternative to fossil-based plastics. In addition, biodegradable bioplastics may yield biogas after their use, giving an additional benefit. However, the biodegradability time in international norms (35 days) far exceeds processing times in anaerobic digestion facilities (21 days). As the bioplastic packaging does not indicate the actual biodegradability, it is important to understand the time required to biodegrade bioplastic if it ends up in the anaerobic digestion facility along with other organic waste. For this work, cellulose bioplastic film and polylactic acid (PLA) coffee capsules were digested anaerobically at 55 ℃ for 21 days and 35 days, which are the retention times for industrial digestors and as set by international norms, respectively. Different sizes of bioplastics were examined for this work. Bioplastic film produced more biogas than bioplastic coffee capsules. The biodegradability of bioplastic was calculated based on theoretical biogas production. With an increase in retention time, biogas production, as well as biodegradability of bioplastic, increased. The biodegradability was less than 50% at the end of 35 days for both bioplastics, suggesting that complete degradation was not achieved, and thus, the bioplastic would not be suitable for use in biogas digesters currently in use. View Full-Text
Keywords: bioplastic; biodegradability; thermophilic; bio-based; anaerobic digestion bioplastic; biodegradability; thermophilic; bio-based; anaerobic digestion
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MDPI and ACS Style

Shrestha, A.; van-Eerten Jansen, M.C.A.A.; Acharya, B. Biodegradation of Bioplastic Using Anaerobic Digestion at Retention Time as per Industrial Biogas Plant and International Norms. Sustainability 2020, 12, 4231. https://doi.org/10.3390/su12104231

AMA Style

Shrestha A, van-Eerten Jansen MCAA, Acharya B. Biodegradation of Bioplastic Using Anaerobic Digestion at Retention Time as per Industrial Biogas Plant and International Norms. Sustainability. 2020; 12(10):4231. https://doi.org/10.3390/su12104231

Chicago/Turabian Style

Shrestha, Ankita; van-Eerten Jansen, Mieke C.A.A.; Acharya, Bishnu. 2020. "Biodegradation of Bioplastic Using Anaerobic Digestion at Retention Time as per Industrial Biogas Plant and International Norms" Sustainability 12, no. 10: 4231. https://doi.org/10.3390/su12104231

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