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بهینهسازی حذف COD و BOD از فاضلاب کارخانة لبنی با استفاده از فرآیند فنتون | ||
نشریه محیط زیست طبیعی | ||
دوره 78، ویژهنامه پایش و مدیریت آلایندههای محیطزیست طبیعی، تیر 1404، صفحه 127-139 اصل مقاله (1.04 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/jne.2024.386319.2734 | ||
نویسندگان | ||
مهتاب باباجانی مرزناکی؛ حسن رضایی* ؛ هاجر آبیار | ||
گروه محیط زیست، دانشکدة شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران. | ||
چکیده | ||
صنایع لبنی بهعنوان یکی از برترین صنایع در عرصة مواد غذایی مطرح است که در طی فرآیندهای ساخت و فرآوری محصولات لبنی مقدار زیادی آب مصرف میکند. فاضلاب حاصل از این صنایع حاوی ذرات معدنی، مواد آلی، فلزات سنگین و مواد معلق است که اگر بهدرستی تصفیه نشوند اکوسیستمهای آبی و تنوع زیستی منطقه را تحت تأثیر قرار میدهد. هدف از این تحقیق تصفیة فاضلاب لبنی و کاهش COD و BOD با استفاده از فرآیند فنتون و ارزیابی تأثیر پارامترهای عملیاتی مختلف با استفاده از روش سطح پاسخ است. در ابتدا خصوصیات فاضلاب لبنی مانند pH، COD، TSS، TDS، فسفات و نیترات مشخص شد. طراحی آزمایش با روش سطح پاسخ توسط نرمافزار Design-Expert جهت بهینهسازی پارامترهای عملیاتی از قبیل H2O2، Fe2+، pH و زمان تماس واکنش انجام شد. کارایی فرآیند فنتون در تصفیة فاضلاب لبنی طی 30 آزمایش مورد بررسی قرار گرفت و در نهایت شرایط بهینه مشخص گردید. نتایج بررسی کیفیت فاضلاب لبنی نشان داد که غلظت اولیة COD فاضلاب 1400 میلیگرم بر لیتر است. علاوه بر این، پارامترهای pH و غلظت H2O2 بیشترین تأثیر را در کاهش حداکثری COD داشتند. بالاترین بازدهی حذف COD و BOD در شرایط بهینه (3/5 =pH، H2O2 برابر 54 میلیلیتر، 4 گرم +Fe2 و زمان تماس واکنش برابر 10 دقیقه) بهترتیب 93 و 88 درصد بود. علیرغم بازدهی و پتانسیل بالای فرآیند فنتون در حذف COD و BOD فاضلاب لبنی، استفاده از این رویکرد در مقیاس صنعتی نیازمند ارزیابی جامع محیطزیستی و اقتصادی است. | ||
کلیدواژهها | ||
پساب لبنی؛ ترکیبات آلی؛ غلظت آهن؛ فنتون | ||
عنوان مقاله [English] | ||
Optimization of COD and BOD removal from dairy plant wastewater using the Fenton process | ||
نویسندگان [English] | ||
Mahtab Babajani Marzenaki؛ Hassan Rezaei؛ Hajar Abyar | ||
Department of Environmental Sciences, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran. | ||
چکیده [English] | ||
The dairy industry is considered as one of the top industries in the field of food production, which consumes a lot of water during the manufacturing and processing of dairy products. Dairy wastewater contains mineral particles, organic substances, heavy metals, and suspended substances, which affect the aquatic ecosystems and biodiversity if not treated properly. The purpose of this research is to treat dairy wastewater and reduce COD using the Fenton process, and to evaluate the effect of different operational parameters by the response surface methodology. At first, the characteristics of dairy wastewater such as pH, COD, TSS, TDS, phosphate, and nitrate were determined. The design of the experiment was carried out using the response surface methodology by Design-Expert software to optimize operational parameters such as H2O2, Fe2+, pH, and contact time. The efficiency of Fenton process in dairy wastewater treatment was investigated during 30 experiments and finally the optimal conditions were determined. The results of dairy wastewater quality investigation showed that the initial COD concentration of wastewater was 1400 mg/L. In addition, pH and H2O2 concentration had the most effect on the maximum reduction of COD. The highest COD and BOD removal efficiency under optimal conditions (pH= 3.5, H2O2 equal to 54 ml, 4 g of Fe2+ and reaction contact time of 10 minutes) was 93% and 88%, respectively. Despite the high efficiency and potential of the Fenton process in removing COD and BOD from dairy wastewater, the use of this approach on an industrial scale requires a comprehensive environmental and economic evaluation. | ||
کلیدواژهها [English] | ||
Dairy wastewater, Fe concentration, Fenton, Organic compounds | ||
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