Performance evaluation of wastewater treatment facilites in selected hospitals of North Khorasan in 1391-1392

Hospital wastewater due to containing many hazardous agents such as infective elements, pharmacy substances, chemical and radioactive agents has a special sensibility. So it is necessary to transfer, treatment and disposal the wastewater of medical centers. This survey aimed to determine wastewater pollution rate in order to achive an accurate planning requirement in bojnurd in this cross-sectional study, wastewater quality of 3 hospitals was evaluated over a period of 5 months in the North khorasan Medical Sciences University in Bojnurd in 91-92. None of these hospitals had treatment plant. Samples were transferred to the chemistry lab. Then, BOD5, COD, TSS, pH, temperature and concentration of Amoxicillin were measured in the lab in 190 nm wavelenth. The results showed that, the higher average BOD5 and COD in Bentolhoda hospital wastewater over the other two, but the concentration of TSS in Imam Reza Hospital was highest.These findings could be justified on the grounds of the usage of Bentolhoda hospital (maternity). The avearges of pH of the studied hospitals were slightly alkaline which was suitable for biological processes. Amoxicilline concentration of hospitals Imam Ali, Imam Reza and Bentolhoda were 64.88 and 259.4 and 56.49 respectively. Our results showed all of these parameters are higher than its standard level. So it is necessary to have control on hospital wastewater treatment to prevent entrance of hazardous materials to municipal. Therefore, more researches and making positive attitude in related responsible to refine wastewater of these hospitals are suggested.