ABSTRACT : The enzymatic activity of anaerobic digestion bacteria is closely dependent on temperature. Thisresearch work focuses on the design and construction of an experimental digital console that can be integratedinto a biodigester for temperature and humidity monitoring. A first report first presents the technologies suitablefor this application. Then, the choice is made on the design and modeling of a digital console through anArduino board, a DHT11 sensor and a 2×16 LCD display. A biodigester (25 liters plastic container) andaccessories were used. The experimental device produced (digital console) made it possible to monitor theevolution of temperature and humidity in the biodigester loaded with cow dung, for a retention period of 30days. The evolution of the digestion temperature has shown that the measurement results of the digital consoleand the probe thermometer are almost the same, with a correlation coefficient equal to 99%. During thisdigestion period, the temperature varied from 25°C to 41°C (mesophilic mode) and the humidity levels variedfrom 70% to 95%. The results obtained show the reliability of the console achieved. An improvement isnecessary in order to monitor with more precision in real time the other parameters (pH, C/N ratio, productionkinetics, etc.) of optimal production of biogas on site.

Keywords – Realization, Digital Console, Monitoring, Temperature, Humidity, Biodigester