Numerical modeling of two‐phase bubbly flow mixing with mass transport in an effective microorganism odor removing system. Issue 4 (27th March 2015)

• Record Type: Journal Article
• Authors: Ali, Haider; Cheema, Taqi Ahmad; Park, Cheol Woo
• Is Part Of: Journal of chemical technology & biotechnology. Volume 91:Issue 4(2016:Apr.)
• Page Start: 1012
• Page End: 1022
• Publication Date: 2015-03-27
• Subjects: odor removing system -- turbulent bubbly flow -- baffles -- rotating drum -- gas concentration; Biotechnology -- Periodicals; Chemistry, Technical -- Periodicals; Chemical engineering -- Periodicals; Industries -- Environmental aspects -- Periodicals; 660
• DOI: 10.1002/jctb.4674
• Languages: English
• ISSNs: 0268-2575

Abstract

Abstract: BACKGROUND: Industrial odor removers are two‐phase flow systems that use effective microorganisms to capture malodor‐producing gases from the surroundings. The potency of such systems depends on the interaction of gas with the microorganisms. Therefore, the flow and mass transport properties are key to defining the phenomenon more clearly. RESULTS: An efficient mechanism for mixing the two‐phase flow is required to enhance the interaction between the gas and microorganisms. Gas flow must also be controlled to obtain a large residence time in the water basin and facilitate the microorganisms to maximize the usage of malodor‐producing gases. One method of improving the gas residence time is by installing baffles in the water basin. However, the installation of baffles also limits the gas concentration distribution in the water basin. Placing a rotating drum in addition to the baffles may overcome the limitations on gas distribution in the water basin. Gas volume fractions, interfacial area per volume, and gas concentration are evaluated to observe the mixing and gas dissolution phenomenon. CONCLUSION: Before practical implementation, a numerical study on the subject is required for various designs to investigate their effectiveness. Therefore, the present study uses the Euler–Euler numerical scheme to model the gas–liquid flow with mass transport for various designs of water basin. Results show that gas concentration is the most critical parameter in the case of two‐phase bubbly flow. © 2015 Society of Chemical Industry