Enhancing Starch Hydrolysate Purification: Ultrafiltration Performance Under Industrial Conditions

Efficient purification of starch hydrolysates is a critical step in many industrial processes, particularly in the food and biochemical industries. Ultrafiltration has emerged as a promising technology for this purpose, offering selective separation and the potential for continuous operation. However, its long-term performance under realistic process conditions remains a key challenge.

In this study, researchers investigate the behavior of ultrafiltration systems used for starch hydrolysate purification, with a particular focus on membrane fouling, cleaning efficiency, and process stability. The results provide valuable insights into how ultrafiltration can be optimized for reliable industrial use.

Understanding Membrane Fouling in Practice

One of the central findings of the study is the significant impact of membrane fouling on process performance. During operation, accumulated particles and macromolecules form deposits on the membrane surface, leading to a steady decline in permeate flux.

This fouling not only reduces throughput but can also affect separation characteristics, potentially compromising product quality. The study shows that fouling is not a one-time effect but a dynamic process that evolves over time, making continuous monitoring essential for stable operation.

Implications for Industrial Process Stability

From an industrial perspective, the findings underline the importance of integrating ultrafiltration systems with robust monitoring and maintenance strategies. Process stability depends not only on the membrane itself but also on how fouling and cleaning are managed over time.

By implementing tailored cleaning protocols and monitoring key performance indicators such as flux decline, operators can significantly improve process reliability and reduce downtime.

Industry Impact

The insights from this study are highly relevant for industries relying on starch-based products, including food processing, fermentation, and biorefinery applications. Improved ultrafiltration performance directly translates into higher product quality, more efficient resource use, and lower operational costs.

Moreover, extending membrane lifetime and reducing cleaning frequency contribute to more sustainable production processes. As a result, optimized ultrafiltration systems can play a key role in advancing industrial efficiency and supporting the transition toward more sustainable manufacturing.

Project partners

The work was carried out by Institute of Chemical, Environmental and Bioscience Engineering, TU Wien ↗, Competence Center CHASE GmbH ↗, and AGRANA Research & Innovation Center GmbH ↗.

The paper was published in Separation and Purification Technology, Volume 382, Part 5, 26 February 2026, 135998, the authors are Camila Cabeza, Amal El Gohary Ahmed, Mario Minauf, Karin Wieland, Michael Harasek: Enhancing starch hydrolysate syrup purification: long-term ultrafiltration membrane performance under industrial conditionsnvestigation of Pretreatment and Mel Filtration in Mechanical Recycling of Polyethylene Film Waste Streams ↗