The processing plant basically consists in an anaerobic digester which treats the banana waste. There's more to it than that, as project manager and Growcom board member Keith Noble said, "An over-riding principle of the project has been to use locally available materials and expertise wherever possible. The system must also integrate with existing farm practices. If on-farm digesters are to have a commercial future they must add to farm efficiency and be simple to operate."
Just in case you wondered, it takes two weeks for the reactors to start producing methane.