I don't doubt your expertize in this area, and the link was interesting (I guess we're in the point 3 category) but a government site would be better than a commercial one with a vested interest in selling new systems.
Anything organic (e.g. hair, skin cells, and coffee grounds) breaks down, and toilet paper is designed to too. We put food waste in the relevant recycling bin, and don't flush sanitary products of course. I am also light-handed with antibacs and bleach in household cleaning, preferring vinegar e.g. For what it is worth, the story we were told is that the system was started with a dead sheep - a whole one, to provide the relevant microbiological soup to break down whatever else arrived in it. I appreciate that solids do not magically become water, but they don't stay solid; graveyards wouldn't be full of just bones if the other body solids didn't liquify.