E3S Web Conf.
Volume 202, 2020The 5th International Conference on Energy, Environmental and Information System (ICENIS 2020)
|Number of page(s)
|Renewable Energy Development
|10 November 2020
Bioelectricity production from tofu wastewater using microbial fuel cells with microalgae Spirulina sp as catholyte
1 Center of of Biomass and Renewable Energy (CBIORE), Diponegoro University, Indonesia
2 Department of Chemical Engineering, Faculty of Engineering, Diponegoro University, Semarang, Indonesia
* Corresponding author: firstname.lastname@example.org
Microalgae-Microbial Fuel Cells (MMFCs) are very popular to be used to treat organic waste. MMFCs can function as an energy-producing wastewater pre-treatment system. Wastewater can provide an adequate supply of nutrients, support the large capacity of biofuel production, and can be integrated with existing wastewater treatment infrastructure. The reduced content of Chemical Oxygen Demand (COD) is one way to measure the efficiency of wastewater treatment. MMFCs reactors are made in the form of two chambers (anode and cathode) both of which are connected by a salt bridge. Tofu wastewater as an anode and Spirulina sp as a cathode. To improve MFCs performance which is to obtain maximum COD removal and electricity generation, nutrient NaHCO3 as the nutrient carbon source for Spirulina sp was varied. The system running phase on 12 days. The results were Spirulina sp treated with MFCs technology has better growth than non-MFCs. The MMFC generated a maximum power density of 21.728 mW/cm2 and achieved 57.37% COD removal. These results showed that the combined process was effective in treating tofu wastewater.
Key words: Microalgae-Microbial Fuel Cells / Tofu wastewater / Spirulina sp / Chemical Oxygen Demand / Power density
© The Authors, published by EDP Sciences, 2020
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