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Quantitative and qualitative evaluation of effluent pollutants from rainbow trout (Oncorhynchus mykiss) farms in the selected stations in Kohgiluyeh and Boyer Ahmad Province
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Mohammad meysam Salahei ardelani1   , Mahmood Hafezieh2 , Roghayeh Mahmoudi 1, Seyed hossein Moradiyan1 , Hassan Nasrollazadeh Saravi |
1- Iranian Fisheries Science Research Institute (IFSRI), Agricultural Research Education and Extension Organization
2- Iranian Fisheries Science Research Institute (IFSRI), |
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Abstract: (117 Views) |
| In order to evaluate the quality of effluent pollutants from the rainbow trout breeding farms in the selected farms of Kohgiluyeh and Boyer Ahmad Province, water samples were taken from five individual farms during the years 2021-2022. The physical and chemical indicators of water including acidity, biological oxygen demand, dissolved oxygen, electrical conductivity, nitrite, nitrate, phosphate, total suspended solids, total dissolved solids, total hardness, alkalinity, iron, oxygen saturation were measured once in each season from the inlet and outlet water (each treatment with 3 replicates). Based on the results, the range of pH changes (5.93-7.29), biological oxygen demand (6.41-7.56 mg/l), ammonium (0-0.319 mg/l), nitrite (0-0.181 mg/l), nitrate (2.19-19.2 mg/l), phosphate (0. 1-0.18 mg/l), total alkalinity (132-238), dissolved oxygen (3.35-8.11 mg/l), electrical conductivity (311-899 microsiemens/cm), TDS (203.7-607.9), and total hardness (312-157.77 mg/l) were obtained. The results showed that the concentrations of ammonium, nitrite, nitrate, phosphate, EC, and total dissolved solids parameters in the effluent compared to the input from the different farms has increased due to the increase of metabolism, fish density, concentration of nutrients, drugs and disinfectants, intensity and speed of water and the oxygen concentration in the effluent of the farms has decreased due to more metabolic activities than the input from the rearing ponds. Also, the amount of biochemical oxygen demand (BOD) and environmental chemical oxygen demand (COD) were increased and the dissolved oxygen was consumed and its amount decreased due to the increase of organic substances, nitrate, and the provision of oxidation conditions. |
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| Keywords: Environmental parameters, Water quality, Kohgiluyeh and Boyer Ahmad Province, Rainbow trout |
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Full-Text [PDF 904 kb]
(21 Downloads)
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Type of Study: Research |
Subject:
آلودگي محيطهاي آبي
Received: 2023/08/23 | Accepted: 2024/04/29
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