2012-09-25

toilet design for very-low water usage

7.24: gear/toilet/design for very-low water usage:

. the toilet is a small bowl within a larger bowl;
under the small bowl is a cup
that is just large eno' to hold the largest BM
(this "(cup) looks like a hotdog tray 4"x18"(4"deep)).
. the cup forms a seal to the small bowl
in order to prevent escape of gasses that are in the large bowl .
. the cup empties by dropping down a bit to clear the seal,
and then rolling over around the z-axis
(the axis facing you when you're facing the toilet).
. a fan is drawing in air from the small bowl
through the large bowl,
and out the usual sewage vent .
. as the cup is upside down,
a pump sprays the cup to remove debris;
and a partial flush is rinsing the small bowl
in the usual way .
. once the cup is resealed to the small bowl,
the low-water macerator may consist of
pushing the bm into a chopper,
and then pushing the chopped near a central ditch,
then pushing ditch debris into the drain .

. if this is a pressurized drainage system
(for toilets added to basements, etc)
then the BM is pushed through a mesh,
and whatever won't fit through the mesh
is scraped with hooks into a trash tray .
. the trash is then pushed into a slot
on the side of the large bowl
which then empties into a clear plastic box
so you can see when trash needs to be emptied .
( a seal is formed as the box is screwed to large bowl)
. what's not trash is then safe to send to the macerator
which feeds a pump that pressurizes the sewage line .

. if tight on water, the cup need not be full of water;
instead we avoid odor by dumping cup several times
(once for each BM drop) and just rinse after last dump ...
[. the toilet paper will stick to the cup without some water 9.24:
but you'd save papering for after the last dump .]
. each cup dump not only moves the material
but also changes the air .