1 Animal Production Department, National Agronomic Institute in Tunis, University of Carthage, Tunis, Tunisia
2 Laboratory of Materials Molecules and Applications, Preparatory Institute for Scientific and Technical Studies, University of Carthage, Tunis, Tunisia
3 Biochemistry and biotechnology Laboratory, Mohamed First University, Oujda; Morocco
Abstract – Several wastes can be treated by Anaerobic Digestion (AD) to minimize their adverse effects. Different parameters can affect the wastes valorization such as their origin, as well as the used processes and devices. The purpose of this study is to compare two experimental devices for biogasmeasurement and to select the best for its biogas production and laboratory scale operation. The substrate chosen for this study is glucose with the addition of poultry digestate as an inoculum. The use of erlenmeyer as gasometer filled with wateris often inconvenient for various reasons, namely gas solubility in water and water evaporation and also the difficulty of passing the produced gas especially with low flow rate up to the gasometer. Also, we followed the kinetics of the volume of biogas produced by each device as a function of time and the degradation of Organic Matter (OM). The use of the device with the gasometer formed by reverse graduated burette filled by the barrier solution occur the best results in terms of maximum amount of biogas produced, minimization of the reduction of the pH during the AD and the biodegradation of the OM a recorded an important value which confirms the good performance of this device. These results allow us to conclude that the choice of the second digester for starting experimental AD can minimise gas solibility and promotes the stabilization of optimal conditions of AD.