Isikhwama sokupakisha esonakaliswayo, okushiwo kuyena ukuwohloka, kodwa ukupakisha okonakele kuhlukaniswe ngezinhlobo ezimbili "ezinokonakala" kanye "nokonakala ngokuphelele".
Isikhwama sepulasitiki esibolayo senziwe ngotshani bezitshalo nokunye okunobungane emzimbeni womuntu kanye nemvelo, ehlukile kumapulasitiki amathathu okwenziwa, ngemuva kokuthi imfucuza, ngaphansi kwesenzo semvelo yemvelo, ingabola ngokwayo, kungakhathaliseki ukuthi abantu noma imvelo. azinangozi, kungokwalabo emaphaketheni green.Isikhwama sepulasitiki esonakele siwuhlobo lwesikhwama sokuthenga esilahlwayo esingehliswa futhi sicekelwe phansi kalula.
Izikhwama zepulasitiki eziwohlokayo zingahlukaniswa zibe izinhlobo ezimbili kusukela kumehluko wezinto ezingavuthiwe kanye nezici zokubola:
• Isikhwama sepulasitiki senziwa ikakhulukazi ngepulasitiki ye-polyethylene, exutshwe nesitashi nezinye izinto eziphilayo ezibolayo, ezaziwa nangokuthi i-biodegradable plastic bag.Lolu hlobo lwesikhwama sepulasitiki lubola ikakhulukazi isenzo sama-microorganisms.
• Olunye uhlobo lwenziwe ikakhulukazi ngepulasitiki ye-polyethylene, exutshwe nempushana yamaminerali njenge-light desorption agent kanye ne-calcium carbonate, ebizwa nangokuthi i-light desorption plastic bag.Lolu hlobo lwesikhwama sepulasitiki luphuka ngaphansi kwesenzo selanga.
Isikhwama esibola ngokuphelele sisho ukuthi zonke izikhwama zepulasitiki zichithwa zibe amanzi kanye ne-carbon dioxide.Umthombo oyinhloko wale nto ewohlokayo ngokuphelele icutshungulwa kusuka kummbila, umdumbula nezinye izinto ku-lactic acid, eyaziwa nangokuthi i-PLA.I-Poly Lactic Acid (PLA) iwuhlobo olusha lwe-substrate yebhayoloji nezinto ezivuselelekayo ezibolayo.Isitashi impahla eluhlaza is saccharified ukuze uthole i-glucose, bese i-glucose nezinye izinhlobo ezithile ferted ukukhiqiza ubumsulwa high lactic acid, bese i-PLA enesisindo samangqamuzana ethile ihlanganiswa by amakhemikhali synthesis indlela.Ine-biodegradability enhle.Ngemuva kokusetshenziswa, kungacekelwa phansi ngokuphelele ama-microorganisms emvelweni ngaphansi kwezimo ezithile, futhi ekugcineni kukhiqize i-carbon dioxide namanzi.Ayingcolisi imvelo, okuzuzisa kakhulu ukuvikela imvelo futhi iyinto evumelana nemvelo kubasebenzi.
Isikhathi sokuthumela: Mar-05-2021