Evaluation of the anaerobic degradation of food waste collection bags made of paper or bioplastic

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

“…The methane conversion ratios of the two-phase systems were 82.9% and 80.8%, respectively, which was higher than the 70.1% conversion ratio of the single-phase system (Wang et al, 2011). Dolci et al, (2022) have also recently investigated the semi-continuous co-digestion tests of two MaterBi® biodegradable bags together with food wastes (11/91 % in term of DCO). Low degradability was observed as regards bioplastic bags residues, the overall mass of undigested pieces resulted equal to 93% (bag 1) and 69% (bag 2) of the inserted weight suggesting that an aerobic composting phase is necessary to achieve satisfactory biodegradation yield.…”

“…After 100 days, the plateau phase of biodegradation was not reached for any of those blends; they only underwent 12 to 20% biodegradation. Recently, Dolci et al (2022) have investigated the methane potential of four Mater-Bi® bags and biodegradability ranged from 71% to 93% in less than 56 days.…”

“…Pilot experiments provide valuable insights regarding process performances and stability over long periods of time. To date, few studies have investigated the anaerobic digestion of biodegradable plastics on a pilot scale (Benn and Zitomer, 2018;Venkiteshwaran et al, 2019;Zhang et al, 2018, Dolci et al, 2022. Benn and Zitomer, (2018) performed a continuous anaerobic co-digestion experiment on untreated and pretreated PHB (ENMAT™ Y3000 and Mirel™ F1006).…”

Review on food waste valorisation for bioplastic production towards a circular economy: sustainable approaches and biodegradability assessment

“…This component separation method from pomace decreases the expense and environmental risks because it doesn't require extensive processing time or hazardous chemicals. 42 Wastes that are high in cellulose include durian rind, sugarcane bagasse, corn residue, banana peel, etc. Cellulose has the ability to build fibers through the formation of links between the glucose units joined by using beta-1,4-glycosidic chains.…”

Anaerobní rozložitelnost bioplastů

“…Bioplynové stanice dokážou optimalizovat proces vzniku energeticky významného methanu a efektivně produkovat tepelnou i elektrickou energii, případně vtláčet biomethan do plynárenské sítě (CZ Biom -České sdružení pro biomasu, 2015; Dohányos, 1998;Moravec, 2019). Dolci (2022) ve své studii sleduje dva typy bioplastových sáčků bez upřesnění složení. Byla testována anaerobní rozložitelnost jednotlivých materiálů a také kofermentace s papírovými sáčky.…”