Anaerobic digestion and aerobic composting of rigid biopolymers in bio-waste treatment: fate and effects on the final compost

被引:28
作者
Bandini, Francesca [1 ]
Taskin, Eren [1 ]
Vaccari, Filippo [1 ]
Soldano, Mariangela [2 ]
Piccinini, Sergio [2 ]
Frache, Alberto [3 ]
Remelli, Sara [4 ]
Menta, Cristina [4 ]
Cocconcelli, Pier Sandro [1 ]
Puglisi, Edoardo [1 ]
机构
[1] Univ Cattolica Sacro Cuore, Fac Sci Agrarie Alimentari Ambientali, Dipartimento Sci & Tecnol Alimentari sostenibilit, Via Emilia Parmense 84, I-29122 Piacenza, Italy
[2] Ctr Ric Produzioni Animali SpA CRPA, Viale Timavo 43-2, I-42121 Reggio Emilia, Italy
[3] Politecn Torino sede Alessandria, Dipartimento Sci Applicata & Tecnol, Viale Teresa Michel 5, I-15100 Alessandria, Italy
[4] Univeristadi Parma, Dipartimento Sci Chim Vita & Sostenibil Ambiental, Parco Area Sci 11-A, I-43124 Parma, Italy
关键词
Ecotoxicity; Biodegradation; Compostability; Polylactic acid; Biochemical Methane Potential; ORGANIC FRACTION; DEGRADATION; BIOPLASTICS; RESIDUES;
D O I
10.1016/j.biortech.2022.126934
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
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.
引用
收藏
页数:11
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