MICROBIOLOGICAL EFFECTS AND CONTROL IN COOLING WATER SYSTEM OF MEDICAL CITY HOSPITAL

Abstract

This research included the effect of biological fouling on the efficiency of open recirculating cooling water system in medical city hospital of Baghdad . It showed the relation between fouling deposit and conductive heat transfer resistance . The fouling deposits caues serious problems such as scales and corrosion , (( Utilizing Vials)) method used to determine the quantity of microbiological growth . Sodium hypochlorite (Naocl) used as chemical treatment to control biological fouling growth in this system . It is found that 0.1- 0.2 PPm is the optimum concentration used to control bacterial growth at pH rang 6.5-7.5. Other sources of chlorine is calcium hypochlorite Ca(Ocl)2