عنوان مقاله [English]
Hospital wastewater is a type of municipal wastewater which may contain pathogenic agents and different microorganisms. If properly treated, the effluent from hospital wastewater treatment facilities can be used for irrigation purposes. To investigate this, the effluent from Hamedan Atieh-Sazan General Hospital was studied. The existing treatment facility uses an extended aeration system with an average wastewater flow rate of approximately 150 m3/day. In addition to evaluating the performance of the wastewater facility at Atieh-Sazan General Hospital, quality parameters of the raw wastewater and the effluent were measured. The mean values obtained for pH, BOD, COD, MPN for total Coliform/100ml, and Nematode/lit in raw wastewater were about 7.1, 238 mg/l, 352 mg/l, 5.5´106, and 2340, respectively. The mean values obtained for pH, BOD, COD, Na%, MPN for total Coliform/100 ml, and Nematode/lit in the effluent were 7.1, 35 mg/L, 77 mg/L, 61, 1561, and 575, respectively. Based on these results, the efficiency of the existing system in removing BOD, COD, and MPN/100 ml were %85.3, %78.3, and %99.97, respectively. With respect to water quality standards available, the quality of the effluent was considered to be suitable for irrigation except for its Na%, MPN for total Coliform, and Nematodes values.