پژوهش نفت

پژوهش نفت

بهینه‌سازی تصفیه پساب‌های نفتی از طریق فرآیند ترکیبی انعقاد-اولترافیلتراسیون با استفاده از غشای پلی‌اتر‌سولفون

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دانشگاه صنعتی نوشیروانی بابل
2 1- دانشگاه صنعتی نوشیروانی بابل- دانشکده مهندسی شیمی-بابل-ایران
3 گروه آموزشی صنایع کاربردی-دانشگاه ملی مهارت- تهران- ایران
4 دانشگاه صنعتی نوشیروانی بابل- دانشکده مهندسی شیمی-بابل-ایران
10.22078/pr.2026.5739.3551
چکیده
در این پژوهش، تصفیه پساب نفتی با استفاده از فرآیند ترکیبی انعقاد و غشای اولترافیلتراسیون از جنس پلی‌اتر سولفون مورد بررسی قرار گرفت. غشای پلی‌اتر سولفون به روش وارونگی فاز ساخته شد و جهت مطالعه مورفولوژی آن، آزمون میکروسکوپ الکترونی روبشی (SEM) انجام گردید. در فرآیند انعقاد و اولترافیلتراسیون، از عوامل منعقدکننده کلرید آهن (FeCl₃) و پلی‌آلومینیوم کلرید (PAC) در غلظت‌های مختلف و در مقادیر pH برابر 3، 5، 7 و 10 استفاده شد. این شرایط به‌صورت مجزا و ترکیبی، در حضور و عدم حضور اشعه فرابنفش (UV) و طی مدت زمان 30 دقیقه، به منظور تعیین شرایط بهینه حذف شیمیایی اکسیژن‌خواه (COD) ارزیابی گردید. نتایج نشان داد که در فرآیند انعقاد-اولترافیلتراسیون، افزایش غلظت عوامل منعقدکننده و تغییر pH اثر قابل‌توجهی بر بهبود شار تراوا و کاهش COD دارد. تابش UV می‌تواند با تجزیه جزئی ترکیبات آلی و تأثیر بر لخته‌های تشکیل شده، کارایی فرآیند را افزایش دهد و شار تراوا و عملکرد حذف COD را بهبود بخشد. به طور کلی، استفاده از فرآیند ترکیبی انعقاد همراه با غشای پلی‌اتر سولفون، چه در حضور و چه در عدم حضور تابش UV، موجب افزایش نرخ شار و بهبود عملکرد حذف COD شد. بازده حذف COD در فرآیند انعقاد و فرآیند ترکیبی انعقاد–اولترافیلتراسیون به ترتیب 86٪ و 96٪ به دست آمد.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Optimization of Oily Wastewater Treatment via Integrated Coagulation-Ultrafiltration Process Using Polyethersulfone Membranes

نویسندگان English

Majid Peyravi 1
Khadijah Shahnazari pour 2
Soodabeh Khalili 3
Mohsen Jahanshahi 4
1 Department of Chemical Engineering, Babol Noshirvani University of Technology
2 Department of Chemical Engineering, Babol Noshirvani University of Technology, Shariati Ave., Babol, Iran, Post Code:47148-71167
3 Department of Applied Industries engineering, Technical and Vocational University (TVU), Tehran, Iran
4 Department of Chemical Engineering, Babol Noshirvani University of Technology, Shariati Ave.,Babol, Iran, Post Code:47148-71167
چکیده English

In this study, the treatment of oily wastewater was investigated using a combined coagulation and polyethersulfone (PES) ultrafiltration membrane process. The PES membrane was fabricated via the phase inversion method, and its morphology was examined using scanning electron microscopy (SEM). In the coagulation–ultrafiltration process, ferric chloride (FeCl₃) and polyaluminum chloride (PAC) were applied as coagulants at different concentrations and at pH levels of 3, 5, 7, and 10. These conditions were tested both individually and in combination, in the presence and absence of ultraviolet (UV) irradiation, over a period of 30 minutes, to determine the optimal conditions for chemical oxygen demand (COD) removal. The results indicated that in the coagulation–ultrafiltration process, increasing the coagulant concentration and adjusting the pH significantly improved permeate flux and reduced COD levels. UV irradiation was found to enhance the process efficiency by partially decomposing organic compounds and influencing floc formation, thereby improving both permeate flux and COD removal performance. Overall, the integrated coagulation–PES membrane process, whether applied with or without UV irradiation, led to increased flux rates and enhanced COD removal efficiency. The COD removal efficiencies achieved were 86% for the coagulation process alone and 96% for the combined coagulation–ultrafiltration process.

کلیدواژه‌ها English

Oily wastewater treatment
coagulation
ultrafiltration
membrane
polyaluminum chloride
ferric chloride
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