Method for producing high-purity soy protein isolate using enzymatic and fermentation processes
Innovative method combines enzymatic hydrolysis and lactic fermentation to produce high-purity soy protein isolate with improved flavor. This water-based process reduces off-flavors and eliminates harsh chemicals, offering a cleaner, economical alternative to conventional methods.
Overview
The University of Arkansas, Fayetteville, has developed a novel method for producing soy protein isolate that utilizes enzymatic hydrolysis and lactic fermentation. This innovative process aims to deliver high-purity protein with improved flavor profiles, addressing key limitations of conventional methods which often introduce off-flavors and require harsh chemical treatments. By employing a mild, water-based fractionation system, this method enhances protein purity and flavor, resulting in a cleaner-tasting end product.
Technical specifications
Key features:
- Enzymatic hydrolysis: Starch-degrading enzymes break down residual starch into fermentable sugars, facilitating protein purity.
- Lactic fermentation: Utilizes lactic acid bacteria to biologically acidify and precipitate proteins, eliminating the need for synthetic chemical acidulants.
- Flavor improvement: Simultaneous deactivation of flavor-generating enzymes and catabolism of lipid-derived aldehyde precursors, leading to a cleaner taste.
- Integrated process: Combines extraction and precipitation in a single step, improving efficiency and reducing batch-to-batch variability.
Technology readiness level
This method is currently at Technology Readiness Level 4, indicating that it has been validated in a laboratory environment but requires further development to reach commercial readiness. Future validation will focus on optimizing the process for soybean substrates, aiming to replicate the successful results achieved with chickpea models.
About University of Arkansas, Fayetteville
The University of Arkansas in Fayetteville is a comprehensive public research university and the flagship of the state system, pairing broad academic breadth with an applied, partnership‑oriented research culture. Industry engages through a research and technology park that co‑locates labs, startups, and corporate tenants, with shared instrumentation and prototyping resources. Experiential pipelines—co‑ops and internships across engineering and business—connect companies with talent year‑round, and proximity to multiple Fortune 500 headquarters supports rapid piloting and scale‑up. Research is supported by competitive federal funding from agencies such as NSF, NIH, DOE, USDA, and DoD, and a dedicated technology transfer office streamlines IP, licensing, startups, and corporate‑sponsored research.
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