Anaerobic biodegradation of disposable PLA-based products: Assessing the correlation with physical, chemical and microstructural properties

被引：18

作者：

Bracciale, Maria Paola ^{[1
]}

De Gioannis, Giorgia ^{[2
]}

Falzarano, Marica ^{[3
]}

Muntoni, Aldo ^{[2
]}

Polettini, Alessandra ^{[3
]}

Pomi, Raffaella ^{[3
]}

Rossi, Andreina ^{[3
]}

Sarasini, Fabrizio ^{[1
]}

Tirillo, Jacopo ^{[1
]}

Zonfa, Tatiana ^{[3
]}

机构：

[1] Sapienza Univ Rome, DICMA Dept, Via Eudossiana 18, I-00184 Rome, Italy

[2] Univ Cagliari, DICAAR Dept, Piazza Armi 1, I-09123 Cagliari, Italy

[3] Sapienza Univ Rome, DICEA Dept, Via Eudossiana 18, I-00184 Rome, Italy

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2023年 / 452卷

关键词：

Bioplastic (PLA-based bioplastics); Polylactic acid; Biodegradability; Thermophilic anaerobic digestion; Commercial polymeric blends; THERMAL-DECOMPOSITION; POLY(LACTIC ACID); ORGANIC-MATTER; WASTE; DEGRADATION; BIOPLASTICS; STABILITY; STABILIZATION; DIGESTION;

D O I：

10.1016/j.jhazmat.2023.131244

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In the present study commercial Polylactic Acid-based disposable cups and plates were selected for lab scale anaerobic degradability tests. The experiments were carried out under thermophilic conditions at different inoculum to substrate ratios and test material sizes, and the specific biogas production and associated kinetics were evaluated. Maximum biogas production was comparable for almost all the experimental runs (1620 and 1830 NmL/gTOCPLA) and a biodegradation degree in the range 86-100% was attained. Moreover, physical, chemical and microscopical analyses were used to characterize the tested materials before and after the degradation. The products composition was assessed and the presence of some additives (mainly Ca-based) was detected. Potential correlations among the process parameters and product composition were derived and a delay in process kinetics with increasing amount of additives embedded in the polymeric matrix was observed, confirming the relevant influence of the chemical blend on the biodegradation process.

引用

页数：12

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