Waste Gas Discharged from Hospital Central Vacuum Aspiration System and Its Sterilization by Nanometric Photocatalysis / 中华医院感染学杂志

ABSTRACT

OBJECTIVE To discuss the sterilizing effect of waste gas discharged from hospital central vacuum aspiration system. METHODS According to the characters that direct discharging these waste gases from the central vacuum aspiration system would pollute surrounding environment and that there could not be choke in the venting part of vacuum pump of this system,the method of nanometric photocatalysis was adopted to sterilize the waste gases. RESULTS The average number of colony in the engine room was 2473.67?98.23CFU/m~3 before sterilization.After 1h and 2h of sterilizing,there were 88?17.6 CFU/m~3 and 58.76 ?12.34 CFU/m~3,respectively,with significant difference. CONCLUSIONS It is effective to use the method of nanometric photocatalysis sterilizing the waste gases from the hospital central vacuum aspiration system.The rate of the sterilization is 99.99%.