Qidong Municipal Sewage Treatment Plant tau tsim nyob rau xyoo 2004. Lub tuam txhab feem ntau koom nrog kev kho dej phwj hauv nroog.Nyob rau hauv Qidong City Water Treatment Plant, peb pH meter, yaj oxygen meter thiab lwm yam dej zoo ntsuas tau ua tiav siv rau oxidation ditch dej phwj txheej txheem, ntxiv ib tug quab yuam rau lub nroog ib puag ncig tiv thaiv kev tsim kho.
