Initial experiments on the EHDA spray mechanism that will coat the sludge briquettes revealed that the viscosity of the melted polycaprolactone was too high to be sprayed. Instead nanoparticles of polycaprolactone will be suspended in water and sprayed onto the briquettes.
An experimental rig has now been built to trial this process:
The rig can successfully create a mist of water:
Experiments with the nano particles will start soon.
With thanks to Richard Franceys for the photos.