In the present study commercial Polylactic Acid (PLA) and Mater-Bi (MB) disposable cutlery available on the market were selected for lab scale anaerobic degradability tests. The experiments were carried out under thermophilic conditions at different food to microorganisms (F/M) ratios and test material size, and the specific biogas production and associated kinetics were evaluated. PLA maximum biogas production was comparable for almost all the experimental runs (1550-1670 Nml/gTOC) and only test material size reduction appeared to result in higher yields. Mater-Bi items degradation was strongly affected by product composition and resulted in lower yields. The specific methane yield ranged from 430 to 505 Nml/gVSfood for PLA runs and from 322 to 690 Nml/gVSfood for Mater-Bi runs.
Anaerobic Degradation of Disposable Bioplastics / Bracciale, M. P.; De Gioannis, G.; Falzaran, o. M.; Muntoni, A.; Polettini, A.; Pomi, R.; Rossi, A.; Sarasini, F.; Spiga, D.; Tirillò, J.. - (2022), pp. 25-30. (Intervento presentato al convegno 6th Eurasia Waste Management Symposium tenutosi a Istanbul (TK)).
Anaerobic Degradation of Disposable Bioplastics
Bracciale, M. P.;Polettini, A.;Pomi, R.;Rossi, A.;Sarasini, F.;
2022
Abstract
In the present study commercial Polylactic Acid (PLA) and Mater-Bi (MB) disposable cutlery available on the market were selected for lab scale anaerobic degradability tests. The experiments were carried out under thermophilic conditions at different food to microorganisms (F/M) ratios and test material size, and the specific biogas production and associated kinetics were evaluated. PLA maximum biogas production was comparable for almost all the experimental runs (1550-1670 Nml/gTOC) and only test material size reduction appeared to result in higher yields. Mater-Bi items degradation was strongly affected by product composition and resulted in lower yields. The specific methane yield ranged from 430 to 505 Nml/gVSfood for PLA runs and from 322 to 690 Nml/gVSfood for Mater-Bi runs.| File | Dimensione | Formato | |
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