Estudio de la influencia de la demanda Bioquímica de Oxígeno de Aguas Residuales en la producción de Bioelectricidad de una Celda de Combustible Microbiano

Abstract

The influence of Biochemical Oxygen Demand was studied in the production of bioelectricity within a cell of microbial fuel in the Biotechnology Lab at Chemistry Science School of Escuela Superior Politécnica of Chimborazo; in order to take advantage of Oxygen Demand of waste waters in the generation of sustainable energy. Four microbial fuel cells were designed and built which generate bioelectricity. The cell is formed by two cameras separated by carbon fiber fabric, each camera has 2,1 Kg of ground and 60 gr of charcoal; bacterial consortium was obtai ned from the ground in Pichan - Central community, the first three cells were subjected to experimentation while cell 4 represented the control group. The relation of organic synthetic waste water material was examined regarding to bioelectricity production between cells; in order to do so, some water coming from washed rice obtaining these concentrations: 8 mg/L; 50mg/L; and 200mg/L; same as were supplied to under study cells by analyzing their progress. Connections were made by cables to a device or sensor that directly measured the voltage produced and stored in a PC. While the supplied was made, the amount of bioelectricity cells increased proportionally to the received concentrations. Ther efore it is concluded that using waste water with biochemical oxygen demand of 200mg/L the performance of a fuel microbial cell is increased by an 80% of its average capacity. For this reason, it is recommended to implement this type of technology in the c ommunities which has a rich bacterial consortium in the ground with potential oxide - reductive associated with the surrounding moorlands of Chimborazo Province. In this way clean, self - sustaining energy adapted to the environment could be gotten.