Journal of Wetland Ecobiology
Volume 16, Issue 2 (Summer 2024)
2024, 16(2): 56-63 |
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Ranjbar Y, Koshafar A. Study of the effects of Andimeshk slaughterhouse wastewater discharge on the water quality of the Dez River. Wetland Ecobiology 2024; 16 (2) : 6
URL: http://jweb.ahvaz.iau.ir/article-1-1095-en.html
URL: http://jweb.ahvaz.iau.ir/article-1-1095-en.html
Abstract: (239 Views)
The Dez River, as one of the vital water resources in Khuzestan Province, has been seriously polluted due to the direct discharge of slaughterhouse wastewater. This study investigated the effects of Andimeshk slaughterhouse wastewater discharge on the water quality of the Dez River and evaluated the changes in quality indicators before and after the wastewater discharge. Seasonal sampling was conducted from five stations upstream and downstream of the slaughterhouse during the period from March 1400 to July 1401. Water quality parameters including temperature, dissolved oxygen (DO), biochemical oxygen demand (BOD), pH, turbidity (NTU), nitrate, phosphate, and total coliforms were measured according to standard laboratory methods. The results showed that the introduction of wastewater caused a significant increase in temperature from 19.8 to 22.3 °C, BOD from 2.26 to 2.94 mg/L, turbidity from 185.42 to 268.13, nitrate from 1.63 to 3.47 mg/L, phosphate from 0.43 to 1.63 mg/L, and total coliforms from 5592 to 10180 MPN/100 mL (P < 0.05). Also, a decrease in DO from 8.59 to 7.28 mg/L and pH from 7.94 to 7.72 was observed. These changes indicate a decrease in the self-purification capacity of the river and an increase in the organic and microbial pollution load. The discharge of slaughterhouse wastewater caused a decrease in DO and pH and an increase in BOD, nitrate, phosphate, and total coliforms. The decrease in DO due to the decomposition of organic matter and the increase in BOD indicate a decrease in the self-purification capacity of the river. Increased nitrate and phosphate also increase the risk of eutrophication. Implementation of effective treatment systems and continuous water quality monitoring are essential to prevent further degradation of the Dez River ecosystem.
Article number: 6
Type of Study: Research |
Subject:
Special
Received: 2025/07/30 | Accepted: 2026/01/17 | Published: 2026/01/17
Received: 2025/07/30 | Accepted: 2026/01/17 | Published: 2026/01/17
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