Whey permeate

Production of biogas from whey permeate

Client: Company A. Loacker AG

Implementation period: 03/2025 to 12/2025

Project description:

Whey permeate is produced during the ultrafiltration of whey, a process step in the production of whey protein concentrate. During this process, proteins and fats are separated - what remains is a low-protein and low-fat liquid consisting mainly of lactose, minerals and water.

The "Whey permeate" project is investigating the suitability of this by-product as a substrate for the biogas process.

Initially, batch tests will be carried out to determine the maximum biogas yield. A continuous laboratory fermentation test is then carried out over a period of six months. As mono-fermentation of whey permeate is likely to lead to process instability, the substrate is mixed with cattle manure in various ratios.

The aim of the trial is to identify an optimum mixing ratio that ensures both a stable process and a high biogas yield. The results will serve as a basis for decision-making for possible large-scale implementation.

Contact:

University of Innsbruck
Dr Christian Ebner
Technikerstrasse 13
6020 Innsbruck
c.ebner@uibk.ac.at