کارایی سیستم تله ذره گیر در تصفیه فاضلاب صنعتی کارخانه الکل سازی تخلیه شونده به سد منجیل در استان البرز

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه شیلات، دانشکده منابع طبیعی، دانشگاه تهران، کرج، ایران

چکیده

استفاده مجدد از پساب ها و فاضلاب ها سال های بسیاری است که مورد توجه و اهمیت قرار داشته است. هم چنین کاهش بار آلودگی فاضلاب ها جهت رهاسازی به محیط به منظور حفظ سلامت محیط زیست و جانداران وابسته، ضروری است. در سال اخیر با توجه به ظهور همه‌گیری کووید 19 و افزایش تولید و استفاده الکل، فاضلاب حاصل از تولید الکل افزایش چشمگیری داشته است. از طرفی با توجه به خشکسالی و کمبود آب در قرن حاضر، استفاده مجدد از پساب ها راهی کارآمد در کاهش معضلات به وجود آمده است. با تکیه بر عملکرد سیستم تله ذره گیر، تصفیه و بازیافت آب از پساب حاصل از الکل سازی در دو نوع ویناس و استیلاژ مورد مطالعه قرار گرفت. فاکتورهای BOD، COD و pH در دو نمونه فاضلاب استیلاژ و ویناس، سنجیده شدند. سپس در مخزنی طی سه ساعت تحت تأثیر فرآیند نانوبابلینگ اکسیژن خالص قرار گرفته و پس از آن وارد سیستم تصفیه تله ذره گیر شدند و در خروجی طی ده روز، هر 24 ساعت به صورت تصادفی یک نمونه گرفته شده و مورد ارزیابی قرار گرفتند. فاکتورهای BOD، COD و pH به ترتیب در فاضلاب ویناس به میزان 4348/08±37216/67، 3629/51±78566/65 و 4/30 و در فاضلاب استیلاژ به میزان 3003/89±43166/68، 9106/04±91700/00 و 5/20 به دست آمد. طی مراحل آزمایش و پس از ده روز میزان این فاکتورها در پساب ویناس تصفیه‌شده 32/36±953/50، 107/58±2437/33 و 7/20 و در پساب استیلاژ تصفیه شده 67/66±1392/67، 174/16±3953/34 و 7/80 گزارش شد. بر اساس نتایج به دست آمده به ترتیب میزان فاکتورهای BOD و COD در فاضلاب الکل سازی از نوع ویناس 97/44% و 96/90%، هم چنین در فاضلاب الکل سازی از نوع استیلاژ 96/77% و 95/69% کاهش داشته اند. pH در فاضلاب ویناس 40/28% و در استیلاژ 33/33% افزایش داشته است. در این آزمایش کارایی سیستم تله ذره گیر در هر دو نوع فاضلاب مشخص و مورد تایید است اما در فاضلاب ویناس عملکرد بهتری نشان داده شده. در هر دو نوع فاضلاب نیز فاکتور BOD بیش ترین کاهش را داشته و کم ترین تغییرات به صورت عددی متعلق به pH بوده است. در نهایت با توجه به کارایی مناسب و ارزان قیمت بودن ساخت، سیستم تله ذره‌گیر به عنوان سیستمی کارآمد و مقرون به صرفه در زمینه تصفیه فاضلاب صنایع الکل‌سازی پیشنهاد می گردد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Efficiency of Bit Trap Filter in industrial wastewater treatment of alcohol factory discharge to Manjil Dam in Alborz province

نویسندگان [English]

  • Sayyed Ali Moezzi
  • Arash Javanshir khoei
  • Kiadokht Rezaei
Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran
چکیده [English]

Reuse of wastewater and sewage has been considered for many years. It is also necessary to reduce the burden of sewage pollution to be released into the environment in order to maintain the health of the environment and dependent organisms. In recent years, due to the advent of the Covid 19 epidemic and the increase in the production and use of alcohol, the effluent from alcohol production has increased significantly. On the other hand, due to drought and water shortage in the current century, the reuse of wastewater has become an effective way to reduce problems. Relying on the performance of the Bit Trap Filter, water treatment and recycling of effluent from alcohol production in two types of vinasse and stillage were studied. BOD, COD and pH factors are measured in two samples of stillage and vinasse wastewater. They are then exposed to pure oxygen nano-bubbling in a tank for three hours. After that, they enter the particle trap treatment system and at the output for ten days, a sample is randomly taken and measured every 24 hours. Each experiment was performed with three replications. BOD, COD and pH factors were obtained in vinasse wastewater at 37216.67 ± 4348.08, 78566.65 ± 3629.51 and 4.30 and in stillage wastewater at 43166.68 ± 3003.89, 91700.00 ± 9106.04 and 5.20. During the experimental stages and after ten days, the amount of these factors was reported in treated vinasse effluent 953.50 ± 32.36, 2437.33 ± 107.58 and 7.20 and in treated stillage effluent 1392.67 ± 93.66, 3953.34 ± 174.16 and 7.80. Based on the obtained results, the amount of BOD and COD factors in alcohol production wastewater of vinasse type decreased by 97.44% and 96.90%, respectively, and in alcohol production wastewater of extrusion type decreased by 96.77% and 95.69%. The pH of the vinasse wastewater increased by 40.28% and in the stillage by 33.33%. In this experiment, the efficiency of the Bit Trap Filter in both types of wastewaters is known and confirmed, but in the vinasse wastewater, better performance is shown. In both types of wastewaters, the BOD factor had the highest decrease and the lowest changes were numerically related to pH. Finally, due to the appropriate efficiency and low cost of construction, the particle trap system is proposed as an efficient and cost-effective system in the field of wastewater treatment in the alcohol industry.

کلیدواژه‌ها [English]

  • Bit Trap Filter
  • Stillage
  • Vinasse
  • Nano-bubbling
  • Wastewater treatment
  • Fermentation industry

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فصلنامه محیط زیست جانوری
دوره 15، شماره 2
مرداد 1402
صفحه 265-272

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