Kev tsim kho thiab siv Biodegradable Plastics

Lub ntsiab lus ntawm biodegradable plastics, nws yog taw tes rau hauv cov xwm, xws li av, xuab zeb, dej ib puag ncig, dej ib puag ncig, tej yam kev mob xws li composting thiab anaerobic digestion tej yam kev mob, lub degradation los ntawm microbial kev txiav txim ntawm lub hav zoov ntawm xwm, thiab nws thiaj li. decomposed rau hauv carbon dioxide (CO2) thiab/los yog methane (CH4), dej (H2O) thiab mineralization ntawm cov khoom uas muaj inorganic ntsev, thiab cov tshiab biomass. (xws li lub cev ntawm cov kab mob microorganisms, thiab lwm yam) ntawm cov yas.

Kev sib piv ntawm ntau hom biodegradable plastics

Productivity thiab faib ntawm biodegradable plastics

Raws li cov ntaub ntawv tshiab tshaj tawm los ntawm European Bioplastics Association nyob rau lub Cuaj Hli 2019, txij li lub Cuaj Hlis 2019, lub ntiaj teb txhua xyoo tsim muaj peev xwm ntawm biodegradable plastics yog2144,000 tons;

PLA (polylactic acid) yog628,000 tons, accounting rau29.3%;

PBAT (polyadipic acid / butylene terephthalate) yog606,800t ib, accounting rau28.3%;

Starch-based degradable yas yog96,27t ua, accounting rau44.9%ntawm lub ntiaj teb biodegradable yas muaj peev xwm.

Ntiaj teb no kev faib tawm ntawm biodegradable plastics muaj peev xwm hauv 2019

(Unit: %)

Ntiaj teb no downstream thov rau biodegradable plastics hauv 2019

(Unit: %)

Biodegradable mob

Cov av degradation

PBAT, PHA, PCL thiab PBS tuaj yeem degraded tag nrho tom qab 5 lub hlis.

Tus nqi degradation ntawm PLA cov ntaub ntawv kuj qeeb, tsuas yog 0.23% ib xyoos.

PLA thiab PKAT tuaj yeem degraded tag nrho hauv ib nrab xyoo tom qab sib tov.

Cov dej degradation

PHA thiab PKAT tuaj yeem degraded tag nrho hauv 30 ~ 60 hnub nyob rau hauv cov dej hiav txwv simulated ntawm 25 ℃ ± 3 ℃.