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