Ann: Clean Seas FY18 Results Investor Presentation, page-7

The current biomass investment was the reason for the last placement & will get the production up to a level to support the 4,000+ tonnes sales forecast for FY21 where they expect to produce $8.0-$10m+ of cash.

Isn't that exactly what you're suggesting?
I would expect debt to form the majority of future funding for further expansion.