Phepelo e bohareng ea metsi a nooang libakeng tsa sechaba (likolo. lipetlele, liteishene, lireschorente, mabenkele a mabenkele, litsela tse kholo, joalo-joalo) ke pontšo ea tsoelo-pele ea sechaba 'me e thusa ho ntlafatsa boiketlo ba bareki.Haholo-holo maemong a COVlD-19, phepelo e sa lekaneng e ekelitse bohlokoa ba litšebeletso tsa motheo.Dongguan kinda e na le boiphihlelo bo fetang lilemo tse 18 ho nts'etsopele ea indasteri, Kinda e fana ka tharollo e tsitsitseng le e sebetsang ea kalafo ea metsi mme e tsoela pele ho theha.
Lekala la thuto la Rephabliki ea batho ea Chaena le fane ka maemo a indasteri a litlhoko tsa tekheniki le lintlha tsa lisebelisoa bakeng sa lisebelisoa tsa metsi a nooang kalafo ea membrane likolong tsa mathomo le tse mahareng (JY / T 0593-2019), 5.2.1 le Sehlomathiso A se boletse hore: ( lisebelisoa tsa ho hloekisa metsi sekolong sa mathomo le se mahareng) li lokela ho amohela ultrafiltration le nanofiltration (feela libakeng tse nang le kotsi e kholo ea tšilafalo ea metsi a tala, reverse osmosis e ka sebelisoa. Ha boleng ba metsi a tala bo kopana le maemo, nanofiltration kapa ultrafiltration e ka sebelisoa bakeng sa phekolo).