esi

I reckon (have no proof) that this extract from their announcement a couple of weeks ago could provide an insight into what may be coming:

ENERSLUDGE™ commercialisation
5.7.1 Strategy
Since the completion of the Australian demonstration plant two years ago, ESI
has been pursuing a strategy to commercialise ENERSLUDGETM in as many
markets as possible by:
(a) pursuing relationships with business partners to introduce major infrastructure installations globally assisted by the provision of infrastructure finance in the key markets around the world. In pursuit of
this objective, the Company has appointed Securities International Limited, an investment bank with expertise in the issue of Medium Term
Notes, as advisors to this strategy; and
(b) pursuing projects in its own capacity whilst the network of business partners is being set up.

The Directors intend to aggressively pursue a global implementation strategy for ENERSLUDGETM based on identified processes, including dewatering, to
significantly improve the economics. In addition, the Board anticipates that further revenue streams may be derived from metal recoveries and potentially
other products which could be processed by the same low energy dewatering
process.
The Directors have entered into negotiations with a third party in relation to the
acquisition of the dewatering technology referred to above and are hopeful of
reaching agreement on the terms of the acquisition in the coming weeks.
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There was an article earlier this week in The Age about another group (CRC Group) trialling the removal of moisture / dewatering of coal @ Loy Yang..... so no doubt there is something in this technology - it can be used for purposes other than sludge!