Qidong Municipal Sewage Treatment Plant yakavakwa muna 2004. Kambani iyi inonyanya kuita basa rekuchenesa tsvina yemudhorobha.MuQidong City Water Treatment Plant, yedu pH mita, yakanyungudika okisijeni mita uye mamwe emhando yemamita emvura akaiswa zvinobudirira kune oxidation ditch yekuchenesa sewage process, zvichiwedzera simba kukuvaka kwekuchengetedza nharaunda.
