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Li D, Yan X, Wang W, Wang H, Zhou R, Yang H, Zhang H. New insights into the intensification of collector adsorption on fine particles induced by flow field. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Wang C, Jin M, Yue S, Wang X, Liu B, Shi Y, Qiao N, Yu D. Computational fluid dynamics analysis of Trichosporon fermentans flocculation in refined soybean oil wastewater and flocculation rate prediction method. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 835:155415. [PMID: 35469876 DOI: 10.1016/j.scitotenv.2022.155415] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 04/12/2022] [Accepted: 04/17/2022] [Indexed: 06/14/2023]
Abstract
Trichosporon fermentans can be used to treat refined soybean oil wastewater (RSOW) and produce microbial lipids. Bioflocculation is an effective method to recover Trichosporon fermentans which accumulates intracellular oils from wastewater. During the flocculation, the hydrodynamic distribution and parameters in the reactor are important limiting factors of yeast flocculation performance. In a 0.25 L flocculation device, it was found that the appropriate range of turbulence kinetic energy was within 0.00065-0.00073 m2/s2, the dissipation rate was within 0.119-0.317 m2/s3, and the shear force was less than 0.433 Pa by computational fluid dynamics. In this case, the flocculation rate (Fr) of Trichosporon fermentans could reach more than 90%. The empirical formula associated Fr of Trichosporon fermentans with hydrodynamic parameters was obtained by Matlab, and improved in the enlargement of flocculation device, displaying an error of less than 3.03%. A conical draft tube airlift circulating reactor for flocculation was designed based on the empirical formula, and the Fr reached 91.3%. The study shows that it is feasible to predict Fr of Trichosporon fermentans according to hydrodynamic parameters by numerical simulation, and design the industrial reactor for flocculation harvesting yeasts. It is also helpful for large-scale treatment of RSOW in a safe environment.
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Affiliation(s)
- Chuandong Wang
- Jilin Provincial Science and Technology Innovation Center of Clean Conversion and High-valued Utilization of Biomass, Northeast Electric Power University, Jilin 132012, China; School of Chemical Engineering, Northeast Electric Power University, Jilin 132012, China
| | - Meitong Jin
- Jilin Provincial Science and Technology Innovation Center of Clean Conversion and High-valued Utilization of Biomass, Northeast Electric Power University, Jilin 132012, China; School of Chemical Engineering, Northeast Electric Power University, Jilin 132012, China
| | - Shang Yue
- Jilin Provincial Science and Technology Innovation Center of Clean Conversion and High-valued Utilization of Biomass, Northeast Electric Power University, Jilin 132012, China; School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin 132012, China
| | - Xuefeng Wang
- Hebei Key Laboratory of Water Quality Engineering and Comprehensive Utilization of Water Resources, Hebei University of Architecture, Zhangjiakou 075000, China
| | - Baixin Liu
- Yuanlin Safety Technology Co, Ltd, Changchun 130022, China
| | - Yunfen Shi
- Jilin Provincial Science and Technology Innovation Center of Clean Conversion and High-valued Utilization of Biomass, Northeast Electric Power University, Jilin 132012, China; School of Chemical Engineering, Northeast Electric Power University, Jilin 132012, China
| | - Nan Qiao
- Jilin Provincial Science and Technology Innovation Center of Clean Conversion and High-valued Utilization of Biomass, Northeast Electric Power University, Jilin 132012, China; School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin 132012, China.
| | - Dayu Yu
- Jilin Provincial Science and Technology Innovation Center of Clean Conversion and High-valued Utilization of Biomass, Northeast Electric Power University, Jilin 132012, China; School of Chemical Engineering, Northeast Electric Power University, Jilin 132012, China.
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