Ecology, Bioprocessing and Creativity: From A Bioreactor to an Adhesive

Biotechnological processes often begin with a dairy by-product: whey. This liquid component, which separates from the curd during cheese production, has diverse applications. It serves as a base for cottage cheese, functions as an additive in various food and pastry products, and is even used in pet food. Additionally, whey is processed into beverages with fruit enhancements or other blends. Its lactose and proteins are valuable for pharmaceuticals and infant nutrition. Notably, cheese production globally results in approximately 9 kilograms of whey for every kilogram of cheese.

Challenges and Biotechnological Applications of Whey

In biotechnological contexts where whey undergoes protein and lactose separation, a by-product known as molasses is generated. Characterized by high salt content, molasses poses significant disposal challenges due to its environmental impact and associated costs.

Innovative Process for Ethyl Acetate Extraction from Whey

A collaborative effort between the Fraunhofer Institute for Ceramic Technologies and Systems IKTS in Hermsdorf and TU Dresden has led to the development of a bioprocess for extracting ethyl acetate from molasses. This colorless solvent is integral in producing adhesives, printing inks, paints, and in surface cleaning applications. The fermentation-based method yields high-purity ethyl acetate, presenting a sustainable alternative to traditional methods reliant on fossil fuels.

Advancements in Single-Stage Gas Separation Technology

A significant benefit of this research is the streamlined gas separation process achievable in a single stage, utilizing a minimal number of membranes and control modules. The membranes, composed of a blend of polymers and zeolite-based inorganic particles, effectively separate ethyl acetate through a gas-vapor mixture. The technology not only addresses the molasses disposal issue but also has broader implications. It can be applied in various industries for separating gas mixtures or filtering volatile compounds, including hydrocarbons, thus offering a versatile solution in gas separation technology.