شیمى کاربردى روز

شیمى کاربردى روز

تصفیه فاضلاب با روش ترکیبی انعقاد سازی-فیلتراسیون غشایی برای استفاده در مصارف صنعتی

نوع مقاله : مقاله علمی پژوهشی

نویسندگان
1 دانشکده مهندسی شیمی دانشگاه صنعتی سهند
2 گروه مهندسی شیمی، دانشکده فنی مهندسی، دانشگاه صنعتی خاتم الانبیا (ع) بهبهان، بهبهان، ایران
چکیده
پساب‌های شهری حاوی بار میکروبی و مقدار زیادی ذرات معلق می‌باشند. در این میان بخش قابل‌توجهی از تصفیه‌خانه‌های شهری موجود قادر به تصفیه کامل این پساب‌ها نبوده و تنها بخشی از آلودگی‌ها در این تصفیه خانه‌ها از بین می‌رود. اتخاذ روش مناسب به‌منظور تصفیه کامل پساب خروجی از تصفیه‌خانه‌های شهری جهت استفاده مجدد در صنایع یکی از راهکارهای مناسب در راستای صرفه‌جویی در مصرف منابع آبی می‌باشد. در این تحقیق از دو فرایند انعقادسازی و فیلتراسیون غشایی به صورت ترکیبی به‌منظور تصفیه پساب شهرک سهند استفاده شد بطوریکه مرحله انعقاد سازی بعنوان پیش تصفیه عمل کرده و فیلتراسیون غشایی بعنوان مرحله نهایی تصفیه نقش ایفا می-کند. در مرحله انعقادسازی پساب، پلی آلومینیوم کلراید و پلی آکریلامید بعنوان عوامل انعقاد ساز به‌کاربرده شده و در مرحله فیلتراسیون غشایی، از غشای میکرو متخلخل استفاده شد. نتایج نشان داد، کدورت پساب شهرک پس از طی فرایند ترکیبی از NTU 129 به NTU 7/0 تقلیل یافته و بار میکروبی‌اش به‌طور کامل حذف شد. باوجود کاهش شار عبوری از غشا باگذشت زمان، شستشوی مستقیم منجر به بازگشت عملکرد و افزایش شار عبوری به مقدار اولیه L.m-2 .h-1 1500 شده است. کاهش کدورت و بار میکروبی به مقدار استاندارد به همراه پایداری عملکرد غشایی نشان می‌دهد فرایند ترکیبی استفاده‌شده می‌تواند روشی مناسب جهت تصفیه پساب شهرک‌ها به‌منظور استفاده در شهرک‌های صنعتی و جلوگیری از هدر رفت آب باشد.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Wastewater Treatment Hybrid Process Using Coagulation-Membrane Filtration for Industrial Purposes

نویسندگان English

Ali Aghdami 1
Mahdi Elyasi Kojabad 2
1 Wastewater Treatment Hybrid Process Using Coagulation-Membrane Filtration for Industrial Purposes
2 Faculty of Engineering, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran
چکیده English

Urban wastewater is characterized by microbial contamination and a substantial quantity of suspended solids. Many existing municipal treatment facilities are unable to adequately process these wastewaters, resulting in only partial removal of pollutants. Implementing an effective method for the comprehensive treatment of wastewater from urban facilities for industrial applications is a viable solution to conserve water resources. This study employed a combination of coagulation and membrane filtration processes to treat the wastewater from Sahand town, with coagulation serving as a preliminary treatment and membrane filtration as the final treatment stage. Polyaluminum chloride and polyacrylamide were utilized as coagulants during the coagulation phase, while a microporous membrane was employed in the filtration phase. The findings indicated that the turbidity of the town's wastewater decreased from 129 NTU to 0.7 NTU following the hybrid treatment process, and the microbial load was entirely eliminated. Although there was a reduction in membrane flux, direct washing restored the performance, increasing the flux back to the initial value of 1500 L.m-2.h-1. The significant reduction in turbidity and microbial load to acceptable levels, coupled with the stability of membrane performance, suggests that the combined treatment approach is an effective method for treating urban wastewater for industrial use and for mitigating water wastage.

کلیدواژه‌ها English

Wastewater treatment
Membrane filtration
coagulation
pretreatment
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