The Efficiency of Heavy Metals Treatment of The Wastewater Treatment System, Namon Hospital, Namon District, Kalasin Province

Abstract

     This research was survey research aims to analyze the heavy metals content in the influent and the effluent of wastewater treatment system of Namon Hospital, Namon District, Kalasin Province, to compare the amount of heavy metals in the influent with the standard values, and to compare of heavy metals content in the influent and the effluent for finding the efficiency of the wastewater treatment system for the treatment of heavy metals. The Atomic Absorption Spectrophotometry (AAS) was used to analyze based on the standard methods for the examination of water and wastewater. The samples were collected during March - April 2020.

     The study indicated that the amount of chromium, lead, zinc and mercury in the influent were 0.033, 0.086, 0.383 and 0.000168 mg/l, respectively. The amount of chromium, lead, zinc and mercury in the effluent were 0.063, 0.120, 0.278 and 0.000004 mg/l, respectively. It was found that most of the effluent samples were below the standard exception. The results of the heavy metals in the influent and the effluent were compared by using Pair Sample T-test statistic. It was found that zinc and lead had p-value less than 0.05. The efficiency of treatment values ​​for zinc and mercury were 27.41% and 97.61%, respectively. The recommendation are maintaining the wastewater treatment system in accordance with the technical principles and to periodically replace the soil and plants in the treatment unit of the wastewater treatment system to prevent the accumulation of heavy metals in the soil.