Investigating the Impact of Wastewater from Chamestan Industrial Estate and Ponel Company on Water Quality Parameters of Lavij rood River
Subject Areas : microbiologyFereshteh Ghomiavili 1 * , Narges Afsri 2 , Mohammad Afrazandeh 3
1 - Assistant Professor, Department of Civil Engineering, Nowshahr Branch, Islamic Azad University, Nowshahr, Iran
2 - Associate Professor, Department of Civil Engineering, Nowshahr Branch, Islamic Azad University, Nowshahr, Iran.
3 - MSc, Department of Civil Engineering, Nowshahr Branch, Islamic Azad University, Nowshahr, Iran
Keywords: Water pollution, wastewater, Chamestan Industrial Estate, Lavij rood River.,
Abstract :
Objective: Lavij rood River is one of the freshwater resources in Noor County, Mazandaran Province, Iran. Chamestan Industrial Estate and Ponel Company are located along this river, and their treated effluents are discharged into it. The present study aims to identify pollution types and estimate the approximate pollution load transmitted via Lavij rood River to the Caspian Sea.
Materials and Methods: Seasonal sampling was conducted over one year from four stations: upstream, midstream, downstream, and the estuary of Lavij rood River. The concentrations of EC, BOD₅, COD, and TSS were measured according to the methods proposed in Standard Methods. The results were then analyzed using SPSS and Excel software.
Findings: The pH level remained within the permissible limits set by the Iranian Environmental Protection Organization for effluent discharge into rivers throughout all seasons. However, TSS and BOD levels exceeded the standard limits at all sampling points, though they reached permissible levels at the estuary. Additionally, COD levels peaked during spring and summer but fell below the standard limit in autumn due to heavy rainfall.
Conclusion: After the discharge of effluents from Chamestan Industrial Estate, the physicochemical parameters of the river water exceeded the Iranian Environmental Protection Organization’s standards for effluent release into surface waters. However, wastewater from Ponel Asphalt Company, due to its seasonal operation and inactivity, had no significant impact on river pollution. Furthermore, increased river discharge during rainy seasons enhances the river’s self-purification capacity, reducing pollution levels.
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