کاهش بار آلی فاضلاب کارخانه تولید روغن زیتون به روش تصفیه شیمیایی و بیولوژیک
الموضوعات : آلودگی منابع آب
هانیه میربلوکی
1
,
آریامن قویدل
2
1 - گروه مهندسی محیط زیست، پژوهشکده محیط زیست جهاد دانشگاهی، رشت، ایران
2 - عضو هیات علمی سازمان جهاد دانشگاهی گیلان، رشت، ایران
الکلمات المفتاحية: فاضلاب کارخانه روغن زیتون, COD, تصفیه شیمیایی, تصفیه بیولوژیک,
ملخص المقالة :
پساب آلاینده ناشی از صنعت تولید روغن زیتون، بهدلیل بار آلودگی بالا، یک چالش بومشناختی جدی محسوب میشود. میزان تقاضای اکسیژن شیمیایی (COD) در این فاضلاب به شدت بالاست و بهعلت وجود ترکیبات فنول، در مقابل تجزیه بیولوژیکی بسیار مقاوم است. در پژوهش آزمایشگاهی-کاربردی حاضر، در ابتدا روش تصفیه شیمیایی انعقاد و لختهسازی برای کاهش سمیت فاضلاب بکار گرفته شد و سپس به منظور مراحل تکمیلی تصفیه و بیخطرسازی مواد باقیمانده نهایی، تصفیه بیولوژیک به روشهای بیهوازی و هوازی مورد استفاده قرار گرفت. نتایج بدست آمده از بررسیهای آزمایشگاهی نشان داد که روش شیمیایی بیش از 50 درصد از بارآلی و سمی فاضلاب را حذف کرد. در نهایت، میزان COD فاضلاب خروجی از فرآیند تصفیه زیستی بهmg/L 1100 رسید و شرایط ورود به تصفیهخانه فاضلاب شهری را احراز کرد. بر این اساس، پژوهش انجام شده، راه حل مناسبی برای مرتفع کردن چالشهای محیط زیستی ناشی از صنایع فرآوری زیتون ارائه میکند.
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