A comparative study of two different greenhouse solar dryers for the drying of Olive Mill Wastewater

During the last few years, the management of Olive Mill Wastewater is extensively investigated. Solar greenhouse drying can be the efficient first step to obtain a sludge which can be a potentially recoverable resource. The purpose of this work is to perform a comparison between horizontal and modified even span greenhouse dryers designated to dry Olive Mill Wastewater. The dryers were modeled and simulated using COMSOL Multiphysics. For both dryers, the temperature, the velocity, as well as, the total evaporated mass profiles were presented and discussed. The efficiency of the modified even span greenhouse solar dryer compared to the horizontal one was highlighted.