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مدل‌سازی شرایط حذف اکسیژن مورد نیاز شیمیایی فاضلاب لبنیاتی با استفاده از نانو‌ذرات اکسید مس

نوع مقاله : مقالات پژوهشی

نویسندگان

1 استادیار گروه کشاورزی، دانشکده فنی-مهندسی، دانشگاه پیام نور، تهران، ایران

2 دکترای بهداشت محیط، سازمان مدیریت پسماند شهرداری شیراز، شیراز، ایران

چکیده

زمینه و هدف: مدیریت، کنترل و تصفیه‌ی فاضلاب‌های صنعتی به لحاظ زیست‌محیطی و حفظ آب‌های زیرزمینی یک ضرورت به‌شمار می‌رود. استفاده از روش‌هایی علمی و جدید که در عین‌حال فاقد پیچیدگی‌های فنی سامانه‌های پیشرفته‌ی تصفیه نیز باشند، امکان‌سنجی می‌گردند. 

مواد و روش‌ها: پژوهش حاضر یک مطالعه‌ی تجربی با رویکرد کاربردی در مقیاس آزمایشگاهی بوده که در یک سیستم ناپیوسته انجام شد. حجم نمونه‌ی کل و تعداد آزمایش‌ها با استفاده از روش سطح پاسخ از نوع طرح مرکب مرکزی تعیین گردید و اثر چهار عامل (pH، دوز نانوذرات، زمان تماس و شدت امواج فراصوت) همگی در سه سطح، در فرآیند‌ سونوکاتالیستی با استفاده از نانوذرات اکسید مس برای حذف  CODفاضلاب لبنیاتی مورد بررسی قرار گرفت و شرایط بهینه‌ی‌ حذف و مدل آنالیز واریانس گزارش گردید. 

یافته‌ها: مقایسه بین راندمان تجربی و پیش‌بینی‌شده حذف اکسیژن مورد نیاز شیمیا‌یی طی فرایند سونوکاتالیستی نشان داد مدل آنالیز واریانس برازش خوبی به داده‌ها داشته ‌است و مقادیر بهینه‌ی پیش‌بینی‌شده متغیرها برای دستیابی به بالاترین راندمان حذفCOD  به ترتیب برای pH، دوز نانوذره، زمان تماس و شدت امواج فراصوت، 10/59، 0/05گرم، 60 دقیقه و 84/89کیلوهرتز به‌دست آمد.

نتیجه‌گیری: روش طراحی آزمایش سطح-پاسخ، روشی کارآمد در کم کردن هزینه‌ها و آزمایش‌ها می‌باشد. بررسی اثرات متقابل متغیر‌ها می‌تواند ما را در درک بهتری از اثر متغیرهای مستقل بر متغیر وابسته یاری کند. انجام چنین مطالعاتی که جدیدترین روش‌های علمی را در تصفیه ی پساب‌های صنعتی مورد بررسی قرار می‌دهد، بهترین راه‌حل برای دستیابی به دانش روز و کاهش خسارات زیست‌محیطی است. 

کلیدواژه‌ها

عنوان مقاله [English]

Modeling the Conditions of Chemical Oxygen Demand Removal of Dairy Wastewater Using Copper Oxide Nanoparticles

نویسندگان [English]

  • Iman Homayoonnezhad 1
  • Paria Amirian 2

1 Ph.D., Assistant Professor, Department of Agriculture, Technical-Engineering Faculty, Payam Noor University, Tehran

2 Ph.D., Environmental Health, Waste Management Organization of Shiraz Municipality, Shiraz, Iran

چکیده [English]

Background and Purpose: The Management, control, and treatment of industrial wastewater are considered necessary in terms of environment, furthermore the preservation of groundwater sources. The use of scientific, and new methods, which simultaneously lack the technical complexities of advanced purification systems, are evaluated.

Materials & Methods: The current research is an experimental study with an applied approach on a laboratory scale, carried out in a discontinuous system with the aim of COD removal of dairy wastewater. In this research, the total sample size, and the number of experiments were determined using the response surface method of the central composite design type, and the effects of four factors (pH, nanoparticle dose, contact time, and ultrasound wave intensity) were investigated at three levels in the sonocatalytic process using copper oxide nanoparticles to remove COD of dairy wastewater. The optimal conditions of removal, and the analysis of variance (ANOVA) model were investigated, furthermore reported.

Results: The comparison between the experimental, and predicted efficiency of COD removal showed that the ANOVA model had an excellent fit to the data. The optimal predicted values of the variables to achieve the highest COD removal efficiency (99.85%) were obtained for pH, nanoparticle dose, contact time, and ultrasound intensity, 10.59, 0.05 g, 60 minutes, and 84.89 kHz, respectively.

Conclusion: It can be concluded that the response surface methodology is an efficient way to decrease the costs of tests; examining the interactions between variables can lead to a better understanding of the effect of independent variables on the dependent variables. Conducting such studies, which test, examine the latest scientific methods in industrial wastewater treatment, is the best solution to gain current knowledge, moreover reduce environmental damage. 
 
Open Access Policy: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/

کلیدواژه‌ها [English]

  • Sonocatalytic Process
  • Dairy Industries
  • Wastewater
  • CuO Nanoparticles
  • Response Surface Methodology (RSM)
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مجله پژوهش در بهداشت محیط
دوره 10، شماره 3 - شماره پیاپی 39
آذر 1403
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هم رسانی
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