چکیدهصنعت کاغذسازی یک واحد عملیاتی پیچیده و با تاثیرات متقابل فراوان میباشد. پسابهای این صنعت با داشتن آلایندهها و ترکیبات رنگزای مختلف، یکی از آلودهترین پسابها میباشند. واحدهای زیادی از چوب و کاغذ در سراسر جهان، برای تامین نیازهای روز افزون به محصولات متنوع کاغذ وجود دارند و تخمینها نشان داده است که مصرف کاغذ به شدت در حال افزایش است. در این تحقیق، اثر مواد منعقدکننده آلوم و پلی آلومینیوم کلراید (PACl) برای تصفیه پساب کاغذسازی جهت کاهش پارامترهای اکسیژنخواهی شیمیایی (COD)، کدورت و شاخص حجم لجن (SVI) مورد آزمایش و بررسی قرار گرفته است. مقادیر بهینه مواد منعقدکننده و pH با استفاده از آزمایشهای جار به دست آمده است. تحت این شرایط بهینه، mg/l 1000 آلوم، مقدارmg/l 500 PACl و pH اولیه 6 به دست آمد. نتایج این تحقیق نشان داد که در بین دو منعقدکننده بررسی شده، PACl با میزان حذف 96 درصد کدورت و 99 درصد COD بهترین نتیجه را داشته است. هم‌چنین حجم لجن تولیدی (ml/g 250) به کمک پلی آلومینیوم کلراید کم‌تر از لجن حاصل به وسیله آلوم بوده است. یافتههای حاصل از این مطالعه نشان داد که فرآیند انعقاد شیمیایی میتواند به عنوان یک تکنولوژی جدید برای تصفیه انواع مختلفی از پسابهای صنعتی هم چون صنایع کاغذسازی مورد استفاده قرار گیرد.
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