Quality and quantity survey of hospital wastewaters in Tehran province, Iran

Hospital wastewaters are loaded with pathogenic microorganisms, laboratory and pharmaceutical residuals, pharmaceutical partially metabolized, radioactive elements and other toxic chemical substances, So in order to wastewater treatment and disposal condition have special importance. Aim of this study is survey Tehran province (capital city) hospitals wastewater condition and effluent quality. Cross-sectional method was performed in 2013. In addition 3 multisectors & specialized hospitals were selected. In order to qualification of hospitals wasewaters, composite sampling were conducted from influent and effluent points of selected hospitals wastewater plant for assessement of Chemical Oxygen Demand(COD), Biochemical Oxygen Demand (BOD5), Total Suspended Solid (TSS), Electrical conductivity (EC), pH, Phosphate (PO4), Fical coliform (Fecal coli), Total Coliform (T. Coli) and Total Deterjents (ABS). The results showed that surveyed parameters in effluent of total hospitals have decreased than influent, TSS, PO4, pH, ABS, T.Coli. and Fecal Coliform in all hospitals were lower than standard limits. BOD and COD values were exceeded the standard limits only in effluent of Emam Khomeini hospital, While the electrical conductivity were measured higher than standard limits at the Atiyeh and Emam khomeini hospitals. Studied hospitals are in suitable conditions if the aeration system operates at standard level.