Biosolids are becoming increasingly challenging to export to land due to changing requirements of sludge quality. Concurrently, compliance with Industrial Emissions Directive cannot be compromised. These pressures make the storage of biosolids much more challenging and a need to maximise capacity is of paramount importance. 
This project considers the innovative Dune biodrying technology, based on static pile composting which seeks to minimise energy and time required to dry sludge whilst lowering greenhouse gas emissions. Dune low-energy biodrying supports reduced energy consumption, improved dry solids content, and enables future advanced thermal technologies. Jacobs have conducted four trials with various water companies globally.  Each trial has intended to build upon the last, growing in size, complexity, and data gathering methods. 
Currently, a partnership between Jacobs, Northumbrian Water Limited, and Newcastle University aims to deliver a 12-week, 6-round Dune pilot. The trial targets increasing dry solids from 45% to 60% within two weeks, alongside detailed greenhouse gas monitoring provided by Newcastle University. This trial is significantly more complex than previous trials. The system is designed to be a more permanent and reusable example of the Dune system, and more representative of a fully-implemented product. This paper will present the challenges being overcome in the design of this trial, and potential lessons learned for future scaled implementation.