I’m with you Bruce, but as a development worker, I have to say you picked about the hardest sell there is…using human waste in Africa. Tough cultural marketing problem.
Nevertheless, someone has to do it. So, Thanks.
Was thinking about your system…How often do you have to “clear” your pipe?
Do you have some other substance that could act as a “packing” of sorts for layering, so each one would not stick to the next. I was just thinking that you could do several and then clear.
Also, I made a tool a few years back for punching holes in plastic mulch while simultaneously removing a plug of dirt to set plants in. Basically a piece of pipe (of whatever size) on a wooden handle from a post hole digger or such. and then a lever for the other hand that pushed a rod with a plunger at the top of the pipe that would push the dirt clod out of the pipe. I will try to find it and post a picture. Super fast for making room for plugs/starts. I bet it would work for your purpose too.
Also, just thought of something else. If you could keep pounding a pipe into your medium and somehow have that short pipe attached to a larger pipe with a pipe-1-id-sized slot in the sides across from each other. And then have something that would push through/cut off the brick medium and push it out of the pipe laterally, it could shoot those little bricks out the side pretty quick with one motion. maybe spring loaded or just a weighted plunger. You could make a brick every time you dropped it into your medium and picked it back up again.
Or maybe have the cookie cutter pipe come up into an upside down wye or tee and let the brick roll out of that. Then you could sort of control where it goes.
Luke just found the one I was talking about: