بررسی ارتباط میان تالاب مصنوعی و سلول سوختی میکروبی برای افزایش حذف آلاینده‌ها و تولید برق

نوع مقاله : مروری

نویسندگان

1 گروه مهندسی آب، دانشکدگان ابوریحان، دانشگاه تهران، تهران، ایران

2 گروه مهندسی آب- دانشکدگان -ابوریحان -دانشگاه تهران-تهران-ایران

چکیده

اخیرا سلول­های سوختی میکروبی به دلیل امکان تولید برق و تصفیه پساب به طور همزمان، مورد توجه پژوهشگران قرار گرفته­اند. فرایندهای فیزیکی در سلول­های سوختی میکروبی و تالاب­های مصنوعی مکمل یکدیگر می­باشند. بنابراین ادغام آن­ها موجب بهبود عملکرد سامانه­ها در تصفیه پساب می­شود. یافته‌های اخیر نشان می­دهد استفاده از سامانه سلول­های سوختی میکروبی-تالاب مصنوعی موجب بهبود عملکرد سامانه می­شود. در تالاب مصنوعی با افزایش جمعیت باکتری‌های فعال الکتروشیمیایی در سطوح الکترود عملکرد سامانه افزایش می‌یابد و در نتیجه راندمان تصفیه پساب را به طور قابل ملاحظه­ای افزایش می‌دهد. سلول­های سوختی میکروبی نیز می­توانند از گرادیان اکسایش-کاهش طبیعی در تالاب مصنوعی به منظور تولید برق استفاده کنند. هدف از این پژوهش مقایسه سامانه ادغام شده سلول­های سوختی میکروبی-تالاب مصنوعی  با سامانه­های سلول سوختی میکروبی و تالاب مصنوعی است. این پژوهش نشان می­دهد که ادغام سلول سوختی میکروبی با تالاب مصنوعی موجب افزایش راندمان تصفیه پساب بوسیله گیاه­پالایی، تولید بیشتر برق بوسیله فعالیت گیاهان تالابی و کاهش انتشار گازهای گلخانه­ای بوسیله باکتری­های الکتروژنی می­شود. راندمان حذف پساب و تولید برق در سلول­های سوختی میکروبی-تالاب مصنوعی در مقایسه با سلول سوختی میکروبی و تالاب مصنوعی به ترتیب حدود 8 درصد و 15 درصد بیشتر است. با این حال، با توجه به اندازه و طول عمر سامانه­های تصفیه پساب، سلول­های سوختی میکروبی-تالاب مصنوعی بررسی شده در مطالعات در مقیاس کوچک هستند و تنها در دوره‌های زمانی کوتاه مورد مطالعه قرار گرفته‌اند. اجرای آزمایش­هایی با مقیاس بزرگتر و طولانی مدت جهت اثبات موثر بودن سلول­های سوختی میکروبی-تالاب مصنوعی ضروری می­باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Investigating the relationship between artificial lagoon and microbial fuel cell to increase the removal of pollutants and electricity generation

نویسندگان [English]

  • Hoda Kahrizi 1
  • Seyyed Ebrahim Hashemi Garmdareh 2
1 Water engineering Department. College of Aburaihan, University of tehran
2 Water Engineering Department, Collage of Aburaihan - University Of Tehran, Tehran, Iran
چکیده [English]

Recently, there has been significant research into Microbial Fuel Cell (MFC) technology due to its potential for simultaneous bioenergy generation and wastewater treatment. The fundamental physical processes within CW and MFC are highly complementary, and combining them offers a number of tantalising possibilities for greatly improving wastewater treatment methods. Recent findings have demonstrated a number of beneficial symbiotic interactions that improve overall system performance within an integrated CW-MFC system. Notably, CW operation is enhanced by improvements in the electrochemically active bacteria population at the electrode surfaces, consequently boosting wastewater treatment efficiency. Similarly, the MFC can utilise the natural redox gradient present within CW to assist bioelectricity generation. In this review article, the performance of integrated CW-MFC systems was discussed in comparison with both standalone MFC and CW systems based on criteria that the review identified as significant. The review shows that the combination of CW and MFC increases wastewater treatment efficiency by phytoremediation, MFC power generation is enhanced by the action of the wetland plants, and wetland greenhouse gas emissions are reduced due to the dominance of electrogenic bacteria. Consequently, a CW-MFC can achieve higher efficiency for contaminant removal and bioelectricity generation compared to standalone CWs and MFCs. However, in view of the physical size and operational life span of wastewater treatment systems required for domestic or metropolitan applications, the CW-MFCs presented within the literature are small and have only been studied over short periods of time. Large-scale controlled trials and long-term studies are urgently needed to provide more definitive evidence that can enable CW-MFC technology to advance to the point of successful implementation.

کلیدواژه‌ها [English]

  • Constructed wetlands
  • Microbial fuel cell
  • Wastewater treatment
  • Electricity generation
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