Can anaerobic digestion be a suitable end-of-life scenario for biodegradable plastics? A critical review of the current situation, hurdles, and challenges

Cazaudehore, G.; Guyoneaud, Rémy; Evon, Philippe; Martín-Closas, L.; Pelacho, A. M.; Raynaud, Christine; Monlau, Florian

doi:10.1016/j.biotechadv.2022.107916

Cited by 63 publications

(19 citation statements)

References 198 publications

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“…This was performed by screening suitable candidate papers for analytical and performance data on biodegradation performance for different types of bioplastic products and different anaerobic biodegradation conditions, with a particular emphasis on the most recent data (publication years: 2022 and early 2023). The information retrieved from the selected literature references was built on the data collected by three previous excellent reviews on the subject [ 93 , 109 , 110 ], expanding the dataset by including 2022 and early 2023 results along with additional data and results from further papers that had not been included in these review studies.…”

Section: Methodsmentioning

confidence: 99%

Anaerobic Biodegradability of Commercial Bioplastic Products: Systematic Bibliographic Analysis and Critical Assessment of the Latest Advances

et al. 2023

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Bioplastics have entered everyday life as a potential sustainable substitute for commodity plastics. However, still further progress should be made to clarify their degradation behavior under controlled and uncontrolled conditions. The wide array of biopolymers and commercial blends available make predicting the biodegradation degree and kinetics quite a complex issue that requires specific knowledge of the multiple factors affecting the degradation process. This paper summarizes the main scientific literature on anaerobic digestion of biodegradable plastics through a general bibliographic analysis and a more detailed discussion of specific results from relevant experimental studies. The critical analysis of literature data initially included 275 scientific references, which were then screened for duplication/pertinence/relevance. The screened references were analyzed to derive some general features of the research profile, trends, and evolution in the field of anaerobic biodegradation of bioplastics. The second stage of the analysis involved extracting detailed results about bioplastic degradability under anaerobic conditions by screening analytical and performance data on biodegradation performance for different types of bioplastic products and different anaerobic biodegradation conditions, with a particular emphasis on the most recent data. A critical overview of existing biopolymers is presented, along with their properties and degradation mechanisms and the operating parameters influencing/enhancing the degradation process under anaerobic conditions.

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Section: Methodsmentioning

confidence: 99%

Anaerobic Biodegradability of Commercial Bioplastic Products: Systematic Bibliographic Analysis and Critical Assessment of the Latest Advances

et al. 2023

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“…Sequential alkali pretreatment and AD has been widely applied for the valorization of lignocellulosic biomass, which besides promoting delignification causes the swelling of cellulose fibers, leading to a reduction in their crystallinity and degree of polymerization (Kumari and Das, 2015;Zhu et al, 2010). However, the alkaline pretreatmentaided AD approach applied to bioplastics has been much less investigated (Cazaudehore et al, 2022b;García-Depraect et al, 2021;Yasin et al, 2022). Under alkaline conditions, hydroxide ions can promote polymer hydrolysis via ester cleavage without risk of re-esterification due to thermodynamic barriers, thus facilitating the decomposition of the polymer backbone via surface-and/or bulk-erosion mechanism into soluble monomers (and/or oligomers), such as 3-hydroxybutyric acid and crotonic acid from PHB and lactic acid from PLA (Samitthiwetcharong and Chavalparit, 2019;Yu et al, 2005).…”

Section: Alkaline Pretreatmentmentioning

confidence: 99%

Enhancement of Biogas Production Rate from Bioplastics by Alkaline Pretreatment

et al. 2022

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“…Currently, increasing attention is being given to the cotreatment of compostable plastics and food waste. 9 Certified compostable plastics have clear evaluation standards, such as ISO 17088, EN13432, or ASTM D6400. However, the processing of organic waste around the world is not standardized.…”

Section: ■ Introductionmentioning

confidence: 99%

Certified Compostable Products and Sustainable Food Waste Management via Laboratory-Level Simulation Anaerobic Digestion and Postdigestion Composting

Su,

He,

Lü

et al. 2024

ACS Sustainable Chem. Eng.

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Certified compostable products are designed for use in organic waste management. In practical scenarios, these products can be used as food packaging and food service ware, and they can also be utilized in food waste treatment facilities. In this study, we investigated the degradation of certified compostable plastic bags and coated paper in a laboratory-scale food waste treatment system. Anaerobic digestion (AD) systems operate stably when the addition of certified compostable products accounts for less than 15% of the total feedstock mass. The methane yield of the compostable products during AD was 141− 284 mL/g-VS, varying with the amount of the compostable product added. Cellulose in coated paper achieves resource recovery via methane production and plays a role in regulating the feed quality of ADs. In the subsequent postdigestion composting step, the residual certified compostable plastic in the digestate fully biodegraded within 80 days. The disintegration percentage and mineralization percentage for the post-AD plastic were 88.50 and 77.65%, respectively. Additionally, the composting results indicate that compostable plastic biodegradation is enhanced after AD. This paper highlights the feasibility of using certified compostable plastic bags and coated paper for the cotreatment of food waste through AD and postdigestion composting processes, providing a new method for resourcing paper and plastic products that has reduced direct recycling value due to food waste contamination.

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Can anaerobic digestion be a suitable end-of-life scenario for biodegradable plastics? A critical review of the current situation, hurdles, and challenges

Cited by 63 publications

References 198 publications

Anaerobic Biodegradability of Commercial Bioplastic Products: Systematic Bibliographic Analysis and Critical Assessment of the Latest Advances

Anaerobic Biodegradability of Commercial Bioplastic Products: Systematic Bibliographic Analysis and Critical Assessment of the Latest Advances

Enhancement of Biogas Production Rate from Bioplastics by Alkaline Pretreatment

Certified Compostable Products and Sustainable Food Waste Management via Laboratory-Level Simulation Anaerobic Digestion and Postdigestion Composting

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