Process Engineering Design
for biotech
Allen Associates is one of Scotland’s leading chemical and process engineering consultancies, providing specialist engineering support to the biotechnology, fermentation and industrial bioprocess sectors.
Our team has extensive experience developing fermentation-based manufacturing facilities, biofuel plants, solvent recovery systems, utility infrastructure and downstream processing operations. We support clients throughout the project lifecycle, from early-stage feasibility and business case development, through FEED studies and supporting investor-grade cost estimating, to detailed design, construction support, commissioning and operational optimisation.
Recent projects include major engineering support for Celtic Renewables’ Project Catkin, where Allen Associates provided process engineering, Aspen Plus modelling, solvent recovery system optimisation, hygienic design development, CIP/SIP strategy, process safety studies, equipment specification and FEED delivery for a commercial-scale biofuels facility.
Combining practical project delivery experience with rigorous engineering analysis, we develop solutions that are technically robust, commercially viable and capable of withstanding the scrutiny of investors, funding bodies and regulatory stakeholders.


Typical services include:
Feasibility & Concept Development
Detailed Engineering & Design
Project Delivery & Implementation
Clients often tell us that Allen Associates hits a “sweet spot” in the market. We combine the technical capability and engineering rigour needed to deliver large-scale biotechnology and fermentation projects with the responsiveness, flexibility and personal service of a specialist consultancy.
This allows us to develop practical, commercially focused solutions that are appropriately engineered for the project, helping clients maximise value from their investment while still meeting the expectations of investors, funders and regulatory stakeholders.



Our Clients
While best known for our work with major brands in the world of distilled spirits our involvement in the bio-tech sector continues to go from strength to strength. This includes working with Celtic Renewables, MiAlgae, and Rothes Corde Ltd, on innovative projects where our understanding of fermentation, separation, heat integration, Aspen Modelling and co-product handling has added significant value to their business.