Anaerobic digestion and aerobic composting of rigid biopolymers in bio-waste treatment: fate and effects on the final compost.
Biochemical Methane Potential
Biodegradation
Compostability
Ecotoxicity
Polylactic acid
Journal
Bioresource technology
ISSN: 1873-2976
Titre abrégé: Bioresour Technol
Pays: England
ID NLM: 9889523
Informations de publication
Date de publication:
May 2022
May 2022
Historique:
received:
14
01
2022
revised:
23
02
2022
accepted:
27
02
2022
pubmed:
7
3
2022
medline:
14
4
2022
entrez:
6
3
2022
Statut:
ppublish
Résumé
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.
Identifiants
pubmed: 35248711
pii: S0960-8524(22)00263-2
doi: 10.1016/j.biortech.2022.126934
pii:
doi:
Substances chimiques
Polyesters
0
Soil
0
Starch
9005-25-8
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
126934Informations de copyright
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