Cov khoom siv uas lwj tau feem ntau muab faib ua plaub pawg: cov yas uas lwj tau, cov yas uas lwj tau, cov yas uas lwj tau/yaig tau thiab cov yas uas lwj tau hauv dej. Cov yas uas lwj tau yog cov khoom uas ua rau cov yas hloov pauv tau. Thaum lub hnub ci ntsa iab, cov yas yuav lwj maj mam. Tab sis nws qhov tsis zoo yog tias lub sijhawm lwj tau cuam tshuam los ntawm lub hnub ci thiab huab cua ib puag ncig, yog li nws tsis tuaj yeem tswj tau. Cov yas uas lwj tau yog hais txog cov yas uas cov kab mob me me uas muaj nyob hauv xwm tuaj yeem lwj mus ua cov khoom sib xyaw uas tsis muaj molecular ntau, xws li cov kab mob, pwm, thiab algae nyob rau hauv qee yam mob. Cov yas no yooj yim khaws cia thiab thauj mus los, thiab muaj ntau yam kev siv. Cov yas uas lwj tau/yaig tau yog cov yas uas muab ob yam ntxwv ntawm cov yas uas lwj tau thiab cov yas uas lwj tau. Tam sim no, cov yas uas lwj tau uas tsim hauv kuv lub tebchaws feem ntau yog cov biopolyesters xws li polylactic acid (PLA), polyhydroxyalkanoate (PHA), carbon dioxide copolymer (PPC) thiab lwm yam. Polylactic acid (PLA) yog ua los ntawm polymerization ntawm lactide monomers rho tawm los ntawm cov nroj tsuag qab zib, thiab tuaj yeem degraded tag nrho rau hauv dej thiab carbon dioxide nyob rau hauv kev lag luam composting. Polyhydroxyalkanoates (PHA) yog aliphatic copolyesters nrog cov qauv sib txawv synthesized los ntawm fermentation ntawm ntau yam carbon qhov chaw los ntawm microorganisms. Lawv tsis tsuas yog siv tau rau hauv cov ntaub ntawv ntim khoom, cov yeeb yaj kiab ua liaj ua teb, thiab lwm yam, tab sis kuj siv dav hauv cov tshuaj, tshuaj pleev ib ce, thiab tsiaj pub thiab lwm yam teb. Cov yas dej-degradable yog cov yas uas tuaj yeem yaj hauv dej vim yog ntxiv cov dej-nqus cov tshuaj. Nrog rau kev txhim kho ntawm biotechnology niaj hnub no, cov yas biodegradable tau dhau los ua qhov chaw kub tshiab hauv kev tshawb fawb thiab kev txhim kho.

Nyob rau hauv Suav teb, cov thev naus laus zis biodegradable tam sim no tseem tsis tau loj hlob txaus, thiab yuav muaj qee yam khoom ntxiv. Yog tias ntxiv cov khoom ntxiv no, cov khoom yas yuav tsis ua tiav qhov kev puas tsuaj ntawm biodegradation. Yog tias tsis ntxiv nws, cov khoom yas no yuav lwj tag nrho, tshwj xeeb tshaj yog nyob rau hauv qhov chaw kub siab, yog li nws nyuaj rau khaws cia.
Tsis tas li ntawd, kev siv cov khoom siv biodegradable los ua cov khoompwmyuav tsum tau hloov kho tshwj xeeb.