کاربرد روش انعقاد شیمیایی در تصفیه پساب کارخانه بازیافت کاغذ

نویسندگان

1 دانش آموخته کارشناس ارشد مهندسی منابع طبیعی، دانشگاه تربیت مدرس، نور 2- دانشیار گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه تربیت مدرس، نور

2 دانشیار گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه تربیت مدرس، نور

3 استادیار گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه تربیت مدرس، نور

4 دانشجوی دکترای آلودگی محیط زیست، دانشگاه تربیت مدرس، نور

چکیده

پسابهای صنعت بازیافت کاغذ دارای حجم زیاد و آلودگی بسیار بالایی هستند و فرایند تصفیه این پسابها به‌خاطر تعدد آلاینده‌ها و پیچیدگی ساختمان شیمیایی آنها یکی از مشکل‌ترین و پیچیده‌ترین فرایندهاست. در این مطالعه، فشردگی حجم لجن و میزان حذف کدورت و COD پساب به‌وسیله منعقدکننده‌های آلوم و پلی‌آلومینیوم کلراید تحت تأثیر متغیرهای pH اولیه پساب, COD اولیه پساب و غلظت اولیه مواد منعقدکننده بررسی شدند. محدوده تعیین شده pH اولیه پساب 2 تا 12، غلظت آلوم 200 تا 2000 میلی‌گرم در لیتر، غلظت PACl 50 تا 1500 میلی‌گرم در لیتر و COD اولیه پساب 250 تا 2250 میلی‌گرم در لیتر بود. طبق داده‌های حاصل از مطالعات ناپیوسته, میزان فشردگی حجم لجن 193 میلی‌لیتر بر گرم و حداکثر درصد حذف کدورت و COD به‌ترتیب مقادیر 89/90 و 85/16 درصد با استفاده از منعقد کننده‌های آلوم و PACl به‌دست آمدند. مطالعات نشان داد که مواد منعقدکننده آلوم و PACl توانایی بالایی برای حذف آلاینده‌ها از فاضلاب کارخانه‌ها دارند.


کلیدواژه‌ها


عنوان مقاله [English]

Application of Chemical Coagulation Method for Paper-Recycling Wastewater Treatment

نویسندگان [English]

  • Noushin Birjandi 1
  • Habibollah Younesi 2
  • Nader Bahramifar 3
  • Mojtaba Hadavifar 4
1 M.Sc. Student of Natural Resources Eng., Tarbiat Modares University, Noor
2 Assoc. Prof. of Environment, Dept. of Natural Resources, Tarbiat Modares University, Noor
3 Assist. Prof. of Environment, Dept. of Natural Resources, Tarbiat Modares University, Noor
4 Ph.D. Student of Environmental Pollution, Tarbiat Modares University, Noor
چکیده [English]

Paper-recycling wastewaters have high volume and high pollution and its treatment is the most difficult and complicated process because of their colored pollutants and certain rigid chemical structure. In this study, the efficiency of alum in coupled with polyaluminum chloride (PACl) coagulant on the treatment of paper recycling wastewater was investigated. The effects of initial pH, initial COD and coagulation concentration on sludge volume index (SVI), and turbidity and COD removal were studied. Set tested for coagulation process was 2-12 initial pH, 200-2000 mg/l of alum concentration, 50-1500 mg/l of PACl concentration and 250- 2250 mg/l initial COD. According to the data obtained from batch studies, maximum percentage removal of turbidity and COD 89.90% and 85.16% respectively. The SVI of 193 ml/gr was found in this study. This study showed that the alum and PACl coagulants have high ability to remove pollutants from wastewater factory.

کلیدواژه‌ها [English]

  • Paper-Recycling Wastewater
  • Alum
  • PACl
  • Turbidity
  • COD
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