Ziran Su

Technical University of Denmark | DTU · Department of Chemical and Biochemical Engineering

Enzymatic membrane reactor (EMR) is a type of continuous-flow bioreactor offering easy separation and reuse of biocatalyst while giving opportunities to improve its performance. However, simultaneous enhancement of activity and stability of enzyme while retaining high membrane permeability poses a challenge for a single reactor. Herein, we propose...

Enzymatic membrane (EM) is a tool allowing to simultaneously upgrade enzymatic catalysis and membrane separation processes. However, their commercial use is often restricted by a trade-off between catalytic and mass transfer properties of the system. Herein, we report a new approach to the design of enzymatic membrane reactors (EMRs) - aimed to fin...

This study presents a systematic design of a biocatalytic membrane reactor, where we combined physical adsorption and chemical conjugation of Alcohol Dehydrogenase (ADH) in a novel type of polyelectrolyte (PE) layer-by-layer (LbL) assembly system. The hybrid LbL structure is proposed as a strategy to simultaneously advance activity and operational...

Nowadays, the increasing amounts of dyes present in wastewaters and even water bodies is an emerging global problem. In this work we decided to fabricate new biosystems made of nanofiltration or ultrafiltration membranes combined with laccase entrapped between polystyrene electrospun fibers and apply them for decolorization of aqueous solutions of...

Use of immobilized enzymatic membrane reactors (EMR) is an effective strategy to enhance oligodextran production efficiency. Nevertheless, the reaction-separation coupling mechanism has not been fully understood. In this study, we developed a model to disentangle the mechanism and interaction behind the reaction and separation phenomena in the immo...

An enzymatic membrane reactor (EMR) with immobilized dextranase provides an excellent opportunity for tailoring the molecular weight (Mw) of oligodextran to significantly improve product quality. However, a highly efficient EMR for oligodextran production is still lacking and the effect of enzyme immobilization strategy on dextranase hydrolysis beh...

Immobilized enzymes find applications in many areas such as pharmacy, medicine, food production and environmental protection. However, protecting these biocatalysts against harsh reaction conditions and retaining their enzymatic activity even after several biocatalytic cycles are major challenges. Properly selected supports and type of surface modi...

A by-product from membrane-mediated molasses refining process mainly contains sucrose, glucose, fructose and KCl, which is an ideal raw material to produce high fructose syrup (HFS) by invertase. Ultrafiltration (UF) membrane can achieve invertase reuse while protein adsorption on the membrane not only decreases the membrane permeability, but also...

Certain types of oligosaccharides are especially interesting due to their high commercial value, however, the traditional oligosaccharide fabrication process is neither sustainable nor tailorable for obtainment of commercial standard oligosaccharide streams. The use of enzymatic membrane reactors (EMR) is proposed as a sustainable strategy to obtai...

Oligodextrans with molecular weight (Mw) within the range of 5.0–8.0 kDa have great commercial potential as precursors of iron-dextran for anemia treatment. Traditional oligodextran production consists of sucrose fermentation, acid hydrolysis and ethanol precipitation, which results in an uneven Mw product, hypersaline wastewater discharge and pote...