| Examining the design parameters of CSTR, UASB and EGSB reactors for anaerobic digestion process |
| Paper ID : 1144-NICAME1402 |
| Authors: |
|
Majid Rasouli *1, fatemeh zarei2 1Biosystem Engineering Department, Bu-Ali Sina University, Hamedan, Iran 2Department of Chemical Engineering, Hamedan University of Technology, Iran |
| Abstract: |
| To produce high-purity and stable biogas, improvement and optimization of digester conditions are necessary. Digesters can include various types of reactors such as plug-flow reactors, batch reactors, Up-flow Anaerobic Sludge Blanket reactors, Expanded Granular Sludge Bed reactors, or a combination of these. Each of these reactors has its advantages and disadvantages, which are reviewed in this article to select the best reactor based on the existing conditions such as space and climate requirements. The design methodology and influential parameters are thoroughly discussed, and a review of comprehensive resources on experimental or industrial activities and designs for three reactors, Continuous Stirred Tank Reactor (CSTR), Up-flow Anaerobic Sludge Blanket (UASB), and expanded granular sludge bed (EGSB) is presented along with the findings of these studies. Finally, suitable kinetic models for each reactor are fully described. These kinetic models include Monod, Michaelis-Menten, and Contois models. The results indicate that the CSTR reactor is the most common reactor in the chemical industry due to its complete mixing and simple design advantages. The UASB reactor can easily be combined with other types of reactors and can handle high solids retention time (SRT) even at low hydraulic retention time (HRT). The EGSB reactor is primarily designed to improve contact between granules and wastewater through intensified hydraulic mixing, and the incoming suspended solids are not retained by the granular bed, ultimately leaving the reactor with effluent. |
| Keywords: |
| Bioenergy, Anaerobic digestion, Monod model, Michaelis-Menten model, UASB, EGSB, CSTR |
| Status : Paper Accepted (Poster Presentation) |
