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Effect of biochar on bio-electrochemical dye degradation and energy production
- Sophia Ayyappan, Carmalin, Bhalambaal, V.M., Kumar, Sunil
- Bioresource technology 2018 v.251 pp. 165-170
- adsorbents, biochar, biofilm, chemical oxygen demand, coconuts, electric power, energy, light microscopy, microbial fuel cells, surface area
- The effect of coconut shell biochar on dye degradation in a microbial fuel cell (MFC) was investigated in the present study. Two different doses of biochar (0.5 g and 1 g) and one control without bio-char were studied. The highest COD removal efficiency was about 77.7% (0.5 g biochar), maximum current (1.07 mA) and voltage (722 mV) were obtained with 1 g biochar. Biofilm optical microscopy characterization revealed the micro colonies intricate plate-like structures. High adsorbent dosage might provide a high surface area for biofilm to generate electricity. BET results of coconut shell biochar showed the maximum surface area of 0.9669 m²/g and macroporosity (0.0032 cm³/g). The overall results highlighted the possibility of using biochar as an additive in MFC for efficient dye degradation.