INFECTIOUS DRAINAGE TREATMENT SYSTEM

A drainage pipe disinfection apparatus and a drainage (wastewater) treatment system capable of effectively sterilizing and disinfecting drainage piping of sanitary equipment is provided. The disinfection apparatus for drainage piping of sanitary equipment comprises a cleansing tank, a toilet bowl which serves as the sanitary equipment, and a drainage pipe connected to the toilet bowl, wherein when the sanitary equipment is used, a fixed amount of cleansing water is supplied to the toilet bowl from the cleansing tank, and the cleansing water after cleansing the toilet bowl is drained from the drainage pipe; wherein the disinfection apparatus for drainage piping of sanitary equipment further comprises: replenishment piping configured to replenish, from a water supply system, a fixed amount of water corresponding to the amount of cleansing water supplied from the cleansing tank to the toilet bowl; a sensor configured to sense the supply of water to the cleansing tank; a chemical liquid tank configured to store a fixed concentration of chlorine dioxide; a chemical liquid pump configured to supply a fixed amount of chemical liquid from the chemical liquid tank to the cleansing tank; and a control unit configured to operate the chemical liquid pump by means of a water supply sensing signal from the sensor to supply a fixed amount of chlorine dioxide to the cleansing tank, thereby maintaining the concentration of chlorine dioxide in the cleansing water within the cleansing tank at a fixed concentration.