کاهش بار آلی فاضلاب کارخانه تولید روغن زیتون به روش تصفیه شیمیایی و بیولوژیک
محورهای موضوعی : 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
کلید واژه: فاضلاب کارخانه روغن زیتون, COD, تصفیه شیمیایی, تصفیه بیولوژیک,
چکیده مقاله :
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.
Contaminant effluent from olive oil production industry, due to high pollution load is a serious ecological challenge. The amount of chemical oxygen demand (COD) is very high in this wastewater and is very resistant to biodegradation due to phenol compounds. In the present experimental- applied work, the chemical coagulation and flocculation treatment method was used to reduce the toxicity of wastewater and then, for complementary treatment procedures and detoxification the final residues, biological treatmen was used for anaerobic and aerobic processes. the results of the laboratory studies showed that chemical method removed more than 50% of wastewater's organic and toxic load and ultimately, the COD removal rate of the effluent from the biological treatment process reached 1100 mg/L, meeting the requirements for discharge into the municipal wastewater treatment plant. Accordingly, the conducted research presents an appropriate solution for addressing the environmental challenges arising from olive processing industries.
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