Date on Master's Thesis/Doctoral Dissertation

8-2025

Document Type

Master's Thesis

Degree Name

M.S.

Department

Chemical Engineering

Degree Program

Chemical Engineering, MS

Committee Chair

Williams, Stuart

Committee Co-Chair (if applicable)

Willing, Gerold

Committee Member

Berson, R. Eric

Author's Keywords

Chill haze; bourbon production; turbidimeter; sub-zero turbidity measurement; quality control; bourbon filtration

Abstract

Chill haze is a quality issue in which white wisps and haze become visible in spirits when reaching sub 0℃ temperatures. Common quality control test methods rely on subjective visual tests and ambient temperature turbidity measurements. Currently there is limited access to commercial devices capable of reaching the sub 0 ℃ temperatures that are required for the formation of chill haze. This thesis focuses on the design, assembly and calibration of a custom-built turbidity meter capable of sub 0 ℃ temperatures and humidity control. The system uses an optical sensor at 90 ° to a light source to detect light scatter through a bourbon sample to determine total suspended solids. It also includes integrated temperature and humidity control through thermo-electric coolers, liquid coolant circulation, and dry air lines. The device provides a potential low-cost alternative to commercial lab options for improved quality control of chill haze.

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