The first sentence "Die Feststoffeinbringung ist ausschließlich zur Feststoffbeschickung organischer Trockenmasse bestimmt." seems to indicate that a unit/piece of equipment is meant here. "Feststoffe" are solids or solid matter, "Einbringung" should be understood in the sense of "Beschickung" or "Zufuhr" (as can be derived from the context).

Which type of plant/facility are we talking about here?