Removal of turbidity in low-alcohol Chinese baijiu by coalescence separation

Dan Hu; Yingying Chen; Hehe Li; Huanhuan Wu; Yakai Lin

Results in Engineering (Jun 2024)

Removal of turbidity in low-alcohol Chinese baijiu by coalescence separation

Dan Hu,
Yingying Chen,
Hehe Li,
Huanhuan Wu,
Yakai Lin

Affiliations

Dan Hu: Key Laboratory of Geriatric Nutrition and Health, Beijing Technology and Business University, Beijing, 100048, China; Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing, 100048, China; School of Light Industry, Beijing Technology and Business University, Beijing, 100048, China
Yingying Chen: School of Light Industry, Beijing Technology and Business University, Beijing, 100048, China
Hehe Li: Key Laboratory of Brewing Molecular Engineering of China Light Industry, Beijing Technology and Business University, Beijing, 100048, China; School of Light Industry, Beijing Technology and Business University, Beijing, 100048, China; Corresponding author. Key Laboratory of Brewing Molecular Engineering of China Light Industry, Beijing Technology and Business University, Beijing, 100048, China.
Huanhuan Wu: Beijing International Scientific and Technological Cooperation Base of Water Pollution Control Techniques for Antibiotics and Resistance Genes, Engineering Research Center of Clean and Low-carbon Technology for Intelligent Transportation, Ministry of Education, Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, School of Environment, Beijing Jiaotong University, Beijing, 100044, China
Yakai Lin: Beijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China; Corresponding author. Beijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China.

Journal volume & issue: Vol. 22
p. 102056

Abstract

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Chinese Baijiu has always been preferred by the majority of alcoholic drink lovers with its rich aroma. With the popularity of drinking culture and mental health, low-alcohol Baijiu has achieved increasing attention. This paper innovatively adopts the coalescence method of separating emulsion to solve the turbidity problem in the process of degrading Baijiu. Firstly, the characteristics of feasible materials for turbidity removal via coalescence were explored. Three materials with different pore size, chemical composition, and wetting behavior, namely polyether sulfone (PES), glass fiber (GF) and polyvinylidene fluoride (PVDF), were characterized. Secondly, the emulsion structure and composition of the diluted Chinese Baijiu were analyzed. Finally, the selected porous materials were conducted to separate the precipitates in the degraded Baijiu for a clear Baijiu. The results found that both PVDF with excellent affinity to esters under alcohol solution and PES with small pore size exhibited efficient turbidity removal efficiency. Furthermore, the effect of pore size ranging from 0.1 to 5 μm of the PVDF coalescing material on the turbidity removal was investigated. However, the small pore size resulted in great pressure drop and followed the screening mechanism which contributed to high energy consumption and membrane fouling issue. The large pore size PVDF materials with average pore size of 1.6–4.0 μm achieved high flux of 5.30 × 104 L/(m2·h) with 90∼100% turbidity removal for 39% alcohol content-Baijiu via coalescence. The quality after coalescence removal of turbid was good indicating the coalescence removal method is a Chinese Baijiu turbidity removal potential technology.

Published in Results in Engineering

ISSN: 2590-1230 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology
Website: https://www.journals.elsevier.com/results-in-engineering

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