چكيده به لاتين
Microbial fuel cells offer a pioneering approach to wastewater treatment and energy production. These cells utilize the metabolic activities of microorganisms to decompose organic substances in wastewater while simultaneously generating electricity. This innovative technology not only increases the efficiency of wastewater treatment, but also provides a sustainable source of clean energy, promotes environmental sustainability and reduces the carbon footprint. Consequently, using this technology can be a sustainable solution compared to other traditional treatment methods. Due to the toxicity and expensiveness of the catalysts used in the microbial fuel cell (usually platinum) and considering this parameter as one of the important factors limiting the use of fuel cells on a large scale, Therefore, in this study, a two-chamber microbial fuel cell utilizing chemical activation of the cathode electrode instead of a catalyst was employed to investigate the possibility of producing electrical energy directly from municipal wastewater The Response Surface Method was utilized to model and optimize the MFC performance in terms of power density output, considering anode pH within the range of 6-9 and cathode pH within the range of 2-9 as influencing parameters on power density output. In order to deliberate the validity of the selected models for predicting the output power density, three more tests were conducted to determine a error (cumulative absolute error - SAE). Due to the high importance of kinetic calculation in order to scale up the selection systems, these parameters (Ks, n and E for the second order and k for the first order kinetics) were calculated as well. The experimental results revealed that the optimal condition for achieving the highest power density output, corresponding to 95.81 mW/m2, was with an anolyte pH of 9 and catholyte pH of 2 whereas the real output achived in the laboratory was 102.54mW/m2. After conudcting tests, it was concluded that anolyte pH has a direct and linear impact, while catholyte pH has an inversely semi-logarithmic impact.; the difference between anolyte and catholye pH was considered to be as a influental parameter which can effect directly on power density output. The results of the kinetic model analysis indicated that COD removal operates based on second-order kinetics. Accordingly, the parameters n, E, and Ks were determined to be 0.6297, 1.7386, and 0.0016 L2/gvss.gCOD/h, respectively.
