Investigation of olive mill sludge treatment using a parabolic trough solar collector

Ben Othman, Fares
Eddhibi, Fathia
Bel Hadj Ali, Abdessalem
Fadhel, Abdelhamid
Bayer, Özgür
Tarı, İlker
Guizani, Amenallah
Balghouthi, Moncef
The olive mill sludge treatment system developed in this study is an indirect solar dryer driven by a solar parabolic trough collector (PTC). A heat exchanger is implemented to heat air with hot oil coming from the solar collector. The developed hot air dryer can treat up to 50 kg of olive mill sludge distributed over six trays at once. The designed system and its components are described, along with their experimental and simulated performance evaluations. With a mean direct normal irradiation (DNI) higher than 800 W/m2 and a 3 m/s airflow speed, a maximum drying air temperature of 128 °C was measured. The drying air temperature could be maintained above 100 °C for 10 h. This high temperature is advantageous for the drying problems associated with the presence of oil in the sludge to be dried. The high temperature can also reduce the drying time required to achieve the target moisture content needed for sludge valorization as biomass by 30%. The designed dryer configuration with an adjustable air blower leads to homogeneous sludge treatment. As a result, the position of the sludge inside the drying chamber has no significant effect on the drying rate. The overall analysis shows that maximum thermal efficiency of 58% can be achieved with the 23,909 kWh of thermal energy generated by the system throughout the simulated year of operation. This solar thermal energy supply leads to the mitigation of 15899.69 kg (eq) of CO2 emissions.


Modelling and performance analysis of linear fresnel collector for process heat generation for ice cream factory in Konya
Singh, Rahul; Baker, Derek Keıth; Tarı, İlker; Department of Mechanical Engineering (2017)
In this thesis, a linear Fresnel collector has been designed to supply solar heat for industrial process. Firstly, optical analysis using ray tracing is done to determine the effects of collector’s parameters, such as height of receiver, mirror width and profile, gap between adjacent rows and slope deviation. Afterwards, one-dimensional thermal model is presented which predicts surface temperatures of receiver components and heat loss. The results obtained from both optical and thermal studies are then benc...
Simulation and control strategy adaptation of a parabolic trough collector integrated thermal system for industrial processes
Pınarlı, Deniz; Bayer, Özgür; Department of Mechanical Engineering (2022-1-11)
In this study, integration of solar heat to a milk pasteurization process is addressed. A single tank system with thermal energy storage (TES) is simulated dynamically by connecting the models of individual components to each other, using a simulation tool coded in Visual Basic. The parabolic trough collector (PTC) model is developed such that the time evolution of temperature distribution along a series of collectors can be observed. Lumped approach is employed in the TES unit model in which the heat...
Experimental and numerical analysis of a salt gradient solar pond
Güven, Pelin; Taylan, Onur; Torkmahalleh, Mehdi Amouei; Sustainable Environment and Energy Systems (2018-9)
A salt gradient solar pond (SGSP) is a low-cost solar energy system, collects incoming solar radiation and then stores it in the form of thermal energy. SGSP has been developed recently and is considered as a large-scale energy collector for long-term use with no or little maintenance. It also has no environmental hazard. Most importantly, solar energy meets the energy demand in a clean and sustainable way; thus, SGSP can be though as a sustainable alternative for conventional energy systems. SGSP has three...
Modeling and financial analysis of a solar-biomass hybrid power plant in Turkey
Özdemir, Merve; Yozgatlıgil, Ahmet; Department of Mechanical Engineering (2017)
Solar thermal and biomass combustion systems can be hybridized via a Rankine cycle to have a continuous electricity generation and lower CO2 footprint. Disadvantages of these two renewable technologies can be overcome by hybridization. In this work; we develop a simulation model for Rankine cycle based, solar-biomass hybrid power plants using the ASPEN PLUS software. Solar parabolic collectors and biomass combustion are arranged in parallel to produce steam for power generation. Using the simulation model; ...
Analysis of boron doped hydrogenated amorphous silicon carbide thin film for silicon heterojunction solar cells
Salimi, Arghavan; Turan, Raşit; Department of Micro and Nanotechnology (2019)
Silicon based solar cells are the dominant type of solar cells in the photovoltaic industry. Recently, there have been increasing efforts to develop c-Si solar cells with higher efficiency and lower cost. Among them, silicon heterojunction solar cell (SHJ) is attracting much attention because of its superior performance values demonstrated at both R&D and industrial levels. One of the common limiting criteria is the recombination at the front side which can be solved by providing proper passivation at the f...
Citation Formats
F. Ben Othman et al., “Investigation of olive mill sludge treatment using a parabolic trough solar collector,” Solar Energy, vol. 232, pp. 344–361, 2022, Accessed: 00, 2022. [Online]. Available: