تأثیر پارامترهای دما، pH و غلظت بر عملکرد پیل سوختی میکروبی تک محفظه‌ای

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استاد، گروه عمران- محیط‌زیست، دانشکده عمران، دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران

2 گروه عمران- محیط‌زیست، دانشکده عمران، دانشگاه صنعتی خواجه نصیرالدین طوسی، تهران، ایران

چکیده

پیل سوختی میکروبی، یکی از راهکارهای نوین تولید انرژی است که در آن میکروارگانیسم‌ها با انجام فرایند اکسایش و کاهش از مواد آلی، جریان الکتریکی را به‌وجود می‌آورند. در این پژوهش، یک راکتور تک محفظه‏ای از جنس پلکسی گلاس به حجم 157 میلی‌لیتر ساخته و بررسی شد. این راکتور 3 عدد آند برسی و یک هوا کاتد داشت. بیشینه ولتاژ و چگالی توان به‌ترتیب mv 500 و mW/m2  33 به‌دست آمد. کارایی حذف COD در زمان‌های 8، 12، 24 و 48 ساعت به‌ترتیب 53، 66، 85 و 89 درصد به‌دست آمد که کارایی بالایی برای یک سیستم بی‌هوازی بود و بازده کلومبیک بعد از 25 و 80 ساعت به‌ترتیب برابر 64/13 و 9/20 به‌دست آمد. هر چه غلظت COD ورودی به پیل بیشتر باشد، کارایی برق تولیدی بیشتر است. همچنین، ماکسیمم چگالی توان تولیدی برای غلظت‏های 4500، 2000، 1000، 500، 300 و mg/L 150 به‌ترتیب 393، 330، 285، 252، 230 و mW/m2140 به‌دست آمد. افزایش دما، ابتدا منجر به افزایش کارایی (توان تولیدی) و سپس منجر به کاهش آن ‏شد. افزایش pH نیز ابتدا منجر به افزایش کارایی (توان تولیدی) و سپس کاهش آن ‌شد و pH خنثی، بهینه بود. همچنین سه خوراک مختلف شامل استات، گلوکز و فاضلاب خانگی نیز ارزیابی شد. نوع خوراک بیشتر از آنکه روی مقدار ماکسیمم توان اثر بگذارد، روی سه فاز افزایشی، ایستا و کاهشی اثرگذار بود. همچنین استات و فاضلاب خانگی بسیار شبیه به هم عمل کردند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

The Effect of Temperature, pH and Concentration on the Performance of a Single Chamber Microbial Fuel Cell

نویسندگان [English]

  • Seyed Ahmad Mirbagheri 1
  • Sima Malekmohammadi 2
1 Prof., Faculty of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran
2 Faculty of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran
چکیده [English]

Microbial fuel cells are one of the new methods of energy production that microorganisms generate power from biomass by performing oxidation and reduction processes. In this research, a single-chamber reactor with a volume of 157 ml was constructed and investigated. This reactor had three brush anodes and an air cathode. The maximum voltage and power density were 500 mv and 33 mW/m2, respectively. The COD removal efficiency was 53, 66, 85 and 89% at 8, 12, 24 and 48 hours, respectively, which is a high efficiency for an anaerobic system. The Coulombic efficiency after 25 and 80 hours was 13.64 and 20.9, respectively. The higher the concentration of COD, the higher the efficiency of electricity production. Also, the maximum power density for concentrations of 4500, 2000, 1000, 500, 300 and 150 were obtained as 393, 330, 285, 252, 230 and 140 mW/m2, respectively. An increase in temperature first leads to an increase in efficiency (power production) and then a decrease. An increase in pH also leads to an increase in efficiency (power production) and then to its decrease, and neutral pH is optimal. Also, three different substrates, including acetate, glucose, and domestic wastewater, were evaluated. The type of substrate affects more than the maximum power value; it affects the three increasing, static and decreasing phases. Acetate and domestic wastewater also act very similarly.

کلیدواژه‌ها [English]

  • Microbial Fuel Cell
  • Wastewater Treatment
  • Electricity Production
  • COD Removal
  • Single-Chamber

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مجله آب و فاضلاب
دوره 34، شماره 4 - شماره پیاپی 147
مهر و آبان 1402
صفحه 109-122

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