This is so simple that I want to build a replication. This guy knows what he is talking about as you can see by watching his other videos. This is a commercial process in Germany.
Life on a farm is a school of patience; you can't hurry the crops or make an ox in two days.
Henri Alain
permaculture is a more symbiotic relationship with nature so I can be even lazier. Read tiny ad:
A rocket mass heater is the most sustainable way to heat a conventional home