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DTSTART;TZID="Pacific Time (US & Canada)":20260501T140000
DTEND;TZID="Pacific Time (US & Canada)":20260501T150000
SUMMARY:Chemistry Proposal Defense – Suvanker Saha
LOCATION:Fulmer Hall
DESCRIPTION:Speaker: Suvanker Saha\n\nGroup: Dr. Shulin Chen\n\nTitle: Extraction kinetics, purification, and process optimization of potato peel-derived polyphenols\n\nABSTRACT\n\nPotato peels are a unique agro-industrial by-product and a promising source of phenolic compounds for food and nutraceutical applications. This study proposes a focused, food-grade process to recover a chlorogenic acid-rich phenolic concentrate from waste potato peels. Objective 1 will quantify the release of free, esterified, and bound phenolic fractions during benchmark aqueous extraction and subcritical water extraction, with targeted analysis of major phenolic acids and co-extracted glycoalkaloids. Objective 2 will develop and validate a reduced mechanistic model describing diffusion, matrix rupture/desorption, and thermal degradation, and will use the model to identify operating conditions that maximize phenolic recovery and selectivity while minimizing degradation. Objective 3 will evaluate a targeted ultrafiltration-nanofiltration polishing strategy to produce a food-grade phenolic concentrate and determine whether the added separation step is economically justified relative to the sale of the crude extract. The anticipated outputs are a composition-resolved extraction dataset, a predictive process model, membrane-separation performance data, and decision-grade technoeconomic results to support industrial valorization of potato-peel waste.  These results will be documented in three refereed journal papers to provide the scientific insights into optimizing the extraction and purification processes.
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