CFD in Continuous Stirred Tank: Comparison between Rushton and Paddle Turbines

Abstract:

Biogas produced from palm oil mill effluent (POME) is common in Thailand. A 2-step digestion system, which consists of a continuous stirred-tank reactor (CSTR) and a UASB, is being implemented for biohythane (biohydrogen and biomethane) production. This paper describes three-dimensional computational fluid dynamics (CFD) simulations of POME flow in a laboratory-scale CSTR. The study focuses on comparisonof impellers, the Rushton and the paddle turbines, for the best POME mixing with minimum loss of granules. The result of flow patterns in CFD showed that better mixing in the bottom through the middle of the tank can be achieved by proper selection of impellers and baffles to avoid the loss of granules by effluent.

• Periodical: Advanced Materials Research (Volumes 931-932)
• Pages: 1139-1143
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.931-932.1139
• Online since: May 2014
• Authors: T. Srirugsa*, S. Prasertsan, T. Theppaya, T. Leevijit, P. Prasertsan
• Keywords: Biogas, CFD, Continuous Stirred Tank, Paddle, Rushton

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