بررسی تصفیه شیرابه پسماندهای شهری به‌وسیله فرایند الکتروشیمیایی

نوع مقاله: Research Paper

نویسندگان

1 دانشجوی کارشناسی ارشد مهندسی بهداشت محیط، دانشکده بهداشت، گروه مهندسی بهداشت محیط، دانشگاه علوم پزشکی لرستان، خرم‌آباد، ایران.

2 دکترای مهندسی بهداشت محیط، استادیار دانشکده بهداشت، مرکز تحقیقات غلات، گروه مهندسی بهداشت محیط، دانشگاه علوم پزشکی گلستان، گرگان، ایران

3 دکترای مهندسی بهداشت محیط، دانشیار دانشکده بهداشت، گروه مهندسی بهداشت محیط، دانشگاه علوم پزشکی لرستان، خرم‌آباد، ایران

چکیده

 زمینه و هدف: شیرابه زمین‌های دفن پسماند شهری، یکی از مشکلات مهم محیط‌زیستی است. انعقاد الکتریکی ازجمله روش‌هایی است که برای تصفیه شیرابه به آن توجه می‌شو‌د. هدف از این مطالعه، تصفیه پذیری شیرابه محل دفن پسماند به روش الکتروشیمیایی با استفاده از الکترودهای پلاتین و گرافیت در مقیاس آزمایشگاهی بوده است
روش کار: در این مطالعه، تجهیزات مربوط به راکتور الکتروشیمیایی شامل الکترودآندصفحه‌ای از جنس پلاتین تجاری و کاتد از جنس گرافیت به کار رفته است. درصد حذف کروم و مواد آلی در گستره شدت جریان الکتریکی، 1،2، 3 و 4 آمپر و زمان واکنش 1، 2، 3، 4، 5، 6، 7 و 8 ساعت تعیین مقدار شد.
یافته‌ها: نتایج این مطالعه نشان داد که افزایش زمان سبب افزایش حذف COD و BOD و کروم می‌شود؛ همچنین، میزان تجزیه‌پذیری نیز افزایش می‌یابد. با افزایش میزان شدت جریان الکتریکی، زمان مورد نیاز برای رسیدن به راندمان‌های حذف مشابه کاهش می‌یابد و با کم شدن میزان شدت جریان الکتریکی، زمان مورد نیاز افزایش می‌یابد.
نتیجه‌گیری: فرایند الکتروشیمیایی به‌عنوان فرایند پیش‌تصفیه می‌تواند سبب حذف مواد آلی، فلزات سنگین، کاهش بار آلی و افزایش تجزیه‌پذیری فاضلاب شود. همچنین، می‌تواند به‌عنوان گزینه‌ای مؤثر برای تصفیه مؤثر فاضلاب‌ها، جلوگیری از آلودگی محیط‌زیست، منابع آب و حفاظت از آنها مدنظر قرار گیرد.

کلیدواژه‌ها


عنوان مقاله [English]

A Study on the leachate treatment by using electrochemical process

نویسندگان [English]

  • Elahe Rezaie 1
  • Mahdi Sadeghi 2
  • Ghodratollah Shams Khoramabadi 3
1 MSc Student of Environmental Engineering, Environmental Health Research Center,School of Health, Lorstan University of Medical Sciences, Khoramabad, Iran.
2 Assistant professor of Environmental Health Engineering, Cereal Health Research Center, School of Health, Golestan University of Medical Sciences, Gorgan, Iran
3 Associated professor of Environmental Health Engineering, School of Health, Lorstan University of Medical Sciences, Khoramabad, Iran
چکیده [English]

Background and objective: One of the major environmental problems of municipal landfill is leachate. Electrochemical methods are considered for the treatment of leachate. This study aimed at the treatment of landfill leachate electrochemical method using a platinum electrode and graphite based on a laboratory scale.

Materials & Methods: In this study, the equipment for electrochemical reactor included an anode electrode made of platinum and a cathode electrode made of graphite. Chromium and organic matter removal percentage in the electric current density range of 1, 2, 3, 4 A and reaction time of 1, 2, 3, 4, 5, 6, 7, and 8 hours were surveyed.

Results: The results showed that electrical coagulation process can increase removal of organic matter and heavy metals and by increasing the time the removal of COD and BOD and chromium will increase. Meanwhile, the rate of degradation wills elevates. By increasing the intensity of electric current, the time required to achieve the same removal efficiency is reduced and by reducing the amount of electrical current, the required time increases.

Conclusion:The results indicated that electrochemical process, by using a platinum electrode and graphite is a method for treating wastewater containing heavy metals, BOD and COD .Elerochemical process as a pre-treatment process can remove organic matters, heavy metals. It also reduces the organic load and increases the degradation of sewage. The method can be used as an effective option for the treatment of sewage, prevention of environmental pollution, and protection of water supplies.

کلیدواژه‌ها [English]

  • Solid waste
  • Leachate
  • Electrochemical process
  • Chromium
  • Organic Matter
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