Ukunikezwa kwamanzi okuphuza endaweni eyodwa ezindaweni zomphakathi (izikole. izibhedlela, iziteshi, izindawo zokudlela, inxanxathela yezitolo, imigwaqo emikhulu, njll.) kuwukubonakaliswa kwenqubekelaphambili yomphakathi futhi kusiza ukuthuthukisa umusa wabathengi.Ikakhulukazi kumongo we-COVlD-19, ukunikezwa okunganele kwenyuse ukubaluleka kwengqalasizinda.I-Dongguan kinda ineminyaka engaphezu kwengu-18 yesipiliyoni ekuthuthukisweni kwemboni, i-Kinda inikeza izixazululo zokwelashwa kwamanzi ezinzile futhi eziphumelelayo futhi idala ngokuqhubekayo.
Umnyango Wezemfundo WeRiphabhulikhi Yabantu YaseShayina ukhiphe izinga lezimboni lezidingo zobuchwepheshe kanye nokucaciswa kwempahla yemishini yamanzi okuphuza yokwelapha ulwelwesi ezikoleni zamabanga aphansi nesekondari (JY / T 0593-2019), 5.2.1 kanye neSithasiselo A sisho ukuthi: ( imishini yokuhlanza amanzi yesikole samabanga aphansi nesesekondari) kufanele isebenzise i-ultrafiltration kanye ne-nanofiltration (kuphela ezindaweni ezinengcuphe enkulu yokungcoliswa kwamanzi aluhlaza, i-osmosis ehlehlayo ingasetshenziswa. Uma ikhwalithi yamanzi aluhlaza ifinyelela izinga, i-nanofiltration noma i-ultrafiltration ingasetshenziselwa ukwelashwa).