Optimization of flocculation coagulation process for wastewater treatmentplant of a pulp and paper mill

Publish Year: 1401
نوع سند: مقاله کنفرانسی
زبان: English
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NCECM01_191

تاریخ نمایه سازی: 9 مرداد 1401

Abstract:

Pulp and paper industries are ranked sixth among the world's most hazardous industries. The mostcritical pollutant in these effluents is high COD. It is essential to treat this wastewater before itenters the environment since it causes environmental problems if it enters the receiving waters. Thequality of pulp from cardboard waste depends on how well it is separated at the source; therefore,the quality of the wastewater contaminants differs across different countries. We conducted thisstudy for pulp and paper wastewater treatment in Iran. This study used poly aluminum chloride andalum as coagulants and cationic and anionic polymers as flocculants at different pHs. Thewastewater used was real wastewater with an initial COD and turbidity of ۴۳۵۰±۳۰ ppm and ۸۰±۵NTU. The parameters of COD, turbidity and sludge volume index were evaluated as comparisoncriteria. It was observed that the use of ۷۵۰-۱۲۵۰ ppm Alum as a coagulant and cationic flocculantat the pH of ۷.۸ is the best choice for pulp and paper wastewater treatment. It is suggested thatfuture research will focus on the biological treatment of pulp and paper mill wastewater in Iran.

Authors

Farid Yousefi

Department of Civil Engineering, Sharif University of Technology, Tehran, Iran

Mohammad Raie

assistant professor of the Water and Environmental Engineering group Department of Civil Engineering, Sharif University of Technology, Tehran, Iran