Assessment of effluent pollution from trout farms: (A case study of Sardab spring of Ardal, Iran)
Subject Areas : Environmental pollutions (water, soil and air)Sahar Aminian 1 , Rasool Zamani-Ahmadmahmoodi 2 , Nikokhah Nikokhah 3
1 - MSc in Aquaculture, Department of Fisheries and Environmental Sciences, Faculty of Natural Resources and Earth Science, Shahrekord, Iran.
2 - Associate professor of Environmental Science Department, Faculty of Natural Resources and Earth Science, Shahrekord University, Shahrekord, Iran. *(Corresponding Author)
3 - Assistant professor of Fisheries Science Department, Faculty of Natural Resources and Earth Science, Shahrekord University, Shahrekord, Iran.
Keywords: Trout farms’ effluent, Monitoring, Physicochemical parameters, Ardal.,
Abstract :
Background and Objective: One of the sources of pollution in rivers is effluent discharge from fish farms, which decreases water quality for downstream usage. This study investigated the effects of trout farms’ effluent on the levels of physicochemical parameters in Sardab spring. Material and Methodology: To assess contamination from the effluent, five trout farms along the margin of the river were selected. In summer and autumn 2016, this study analyzed the levels of physicochemical parameters of trout farm effluent, such as pH, temperature, dissolved oxygen, electrical conductivity, nitrate, ammonia, phosphate and turbidity. Findings: According to the obtained results, no significant differences were detected between pH, temperature, dissolved oxygen, ammonia, phosphate, and turbidity in the two seasons (t-test, p>0.05), but a significant difference between levels of nitrate was found in these time periods (t-test, p<0.05). Discussion and Conclusion: The overall level of physicochemical parameters in that summer was higher compared to autumn. The increase in the levels of the investigated parameters in warm weather is probably due to increased temperature and decreased discharge. Rapid population growth in the area of Ardal and the demand for protein foods makes monitoring of the levels of physicochemical parameters of fish farms necessary. In addition to the mentioned factors, increasing the metabolic activities and density of fish in this season can increase the amount of physical and chemical parameters.
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