1. Lub hnab yas uas lwj tau, cov hnab yas uas lwj tau yog cov hnab uas cov kab mob lossis lwm yam kab mob yuav lwj tau. Muaj li ntawm 500 billion txog 1 trillion lub hnab yas siv txhua xyoo. Cov hnab yas uas lwj tau yog cov hnab uas cov kab mob lossis lwm yam kab mob yuav lwj tau. Muaj li ntawm 500 billion txog 1 trillion lub hnab yas siv txhua xyoo.
2. Paub qhov txawv ntawm "biodegradable" thiab "compostable"
Hauv cov lus ib txwm muaj, lo lus biodegradable muaj lub ntsiab lus txawv ntawm compost. Biodegradable tsuas yog txhais tau tias cov khoom tuaj yeem raug decomposed los ntawm cov kab mob lossis lwm yam kab mob, thiab "compost" hauv kev lag luam yas yog txhais tias yog lub peev xwm decompose hauv ib puag ncig aerobic uas tswj hwm ntawm qhov kub thiab txias thiab av noo tshwj xeeb. Compospost yog lub peev xwm biodecompose hauv ib daim teb compost, ua rau cov khoom tsis pom kev thiab decomposed rau hauv carbon dioxide, dej, inorganic compounds thiab biomass ntawm tus nqi sib xws nrog
Qhov kev suav nrog "cov khoom tsis muaj organic" tsis suav nrog cov khoom kawg los ntawm kev suav tias yog compost lossis humus, uas yog cov khoom siv organic xwb. Qhov tseeb, tus qauv xxx uas yuav tsum tau ua rau yas hu ua compost raws li ASTM txhais yog tias nws yuav tsum ploj mus tib yam li lwm yam uas ib tus twb paub ua compost raws li kev txhais ib txwm muaj. Cov hnab yas tuaj yeem ua los ntawm cov yas polymer (piv txwv li, polyethylene) lossis polypropylene thiab sib xyaw nrog cov khoom ntxiv uas ua rau polymer (polyethylene) puas tsuaj thiab tom qab ntawd lwj tau vim.
3. Khoom siv rau lub hnab biodegradable
Muaj zog thiab ruaj khov zoo li cov hnab yas ib txwm muaj (feem ntau yog polyethylene). Ntau lub hnab kuj ua los ntawm ntawv, cov khoom siv organic, lossis polyhexanolactone. "Cov pej xeem pom tias cov khoom siv biodegradable yog ib yam khawv koob," txawm hais tias lo lus no siv dav dav, raws li RamaniNarayan, tus kws ua tshuaj lom neeg ntawm East Lansing Michigan State University thiab tus kws pab tswv yim ntawm Lub Koom Haum rau Cov Khoom Siv Biodegradable." Qhov no yog lo lus siv thiab siv tsis raug ntau tshaj plaws hauv peb phau ntawv txhais lus. Hauv Greater Pacific Waste Area, cov yas biodegradable tawg ua tej daim me me uas yooj yim nkag mus rau hauv cov khoom noj los ntawm kev noj.
4. Kev siv cov hnab yas uas lwj tau dua tshiab.
Feem ntau cov khib nyiab hauv cov nroj tsuag tuaj yeem rov ua dua tshiab, tab sis nws nyuaj rau kev cais thiab rov ua dua tshiab tom qab noj. Cov polymers bio-based tuaj yeem ua rau muaj kev ua qias tuaj rau kev rov ua dua tshiab ntawm lwm cov polymers uas siv ntau dua. Txawm hais tias cov chaw tsim khoom ntawm cov yas aerobic biodegradable hais tias lawv cov hnab tuaj yeem rov ua dua tshiab, ntau tus neeg rov ua dua tshiab zaj duab xis yas yuav tsis lees txais lawv vim tias tsis muaj kev tshawb fawb mus sij hawm ntev txog qhov ua tau ntawm cov khoom siv rov ua dua tshiab uas muaj cov khoom ntxiv no. Tsis tas li ntawd, Lub Koom Haum rau Biodegradable Plastics (BPI) tau hais tias cov qauv ntawm cov khoom ntxiv hauv cov yeeb yaj kiab oxidized sib txawv ntau, uas ua rau muaj kev hloov pauv ntau dua hauv cov txheej txheem rov ua dua tshiab.
Lub sijhawm tshaj tawm: Lub Rau Hli-15-2022
