Qhov chaw nruab nrab ntawm cov dej haus nyob rau hauv pej xeem ib puag ncig (tsev kawm ntawv. tsev kho mob, chaw nres tsheb, tsev noj mov, khw malls, txoj kev loj, thiab lwm yam) yog qhov tshwm sim ntawm kev vam meej hauv zej zog thiab pab txhim kho cov neeg siv khoom zoo.Tshwj xeeb tshaj yog nyob rau hauv cov ntsiab lus ntawm KEVlD-19, cov khoom siv tsis txaus tau nce qhov tseem ceeb ntawm kev tsim kho vaj tse.Dongguan kinda muaj ntau tshaj 18 xyoo ntawm kev paub nyob rau hauv kev lag luam kev loj hlob, Kinda muab ruaj khov thiab npaum dej kho kev daws teeb meem thiab tsis tu ncua tsim.
Lub Tsev Haujlwm Saib Xyuas Kev Kawm ntawm cov neeg koom pheej ntawm Tuam Tshoj tau tshaj tawm cov qauv kev lag luam ntawm cov kev xav tau thiab cov khoom siv tshwj xeeb rau cov khoom siv kho mob membrane dej haus hauv cov tsev kawm ntawv theem pib thiab theem nrab (JY / T 0593-2019), 5.2.1 thiab Cov Ntawv Ntxiv A tau hais tias: ( Cov khoom siv kho dej hauv tsev kawm theem pib thiab theem nrab) yuav tsum tau txais kev siv ultrafiltration thiab nanofiltration (tsuas yog nyob rau hauv cov cheeb tsam uas muaj kev pheej hmoo ntawm cov dej tsis huv, rov qab osmosis tuaj yeem siv tau. Thaum cov dej nyoos zoo raws li tus qauv, nanofiltration lossis ultrafiltration tuaj yeem siv rau kev kho mob).