Waterless Toilets- For Droughted Areas

Do you mean this one?

More info about the ill & Melinda Gates Foundation here.

I hope and wish everything is ok with Bill gates,

Thank you that looks like the right information.ds

GA

Perfectly answers "Has anyone heard of the Contest"

The "How Stuff works" gives the following basic Example of Waterless Toilet. This is a simple system intended for rural dry areas. On the other hand there have been Vacuum Systems that were developed in Sweden, Australia. I suppose, toilet systems on commercial areoplanes also have some sort of Vacuum Flush System.

This is certainly not new stuff. But interesting that you bring it up again. We certainly have a need for this type of thing out in our region. There are desert areas over here. Thanks for reviving this topic again.

I understand part of the challenge is an operating cost of 5¢ per day.

Dry or composting toilets have been in use for many years.

Sounds like a state of the art outhouse. Years ago , in my hippie era, there was a design(Mother Earth News) that you simply emptied wood ash into a container(bottom of the outhouse), The bacteria did their thing and after 2 years there was enriched compost.

Ron

Dewatering and upgrading by pyrolyzing the sludge could be done with an axially-fed double disk mill driven by a peripheral drive wheel. The methane, H2S, ammonia and VOCs would be contained within the apparatus and extracted through an exhaust conduit at the axis of rotation and flared. Shear heating makes steam, which disinfects the sludge, and the steam and is also extracted from the axis. Dewatered sludge is extruded as pyrolyzed solids, even down to char, from the narrow space at the periphery between the counter-rotating grinding disks. Since the ammonia has heen stripped out, the sludge is suitable for fertilizer. A windmill could be the prime mover for the drive wheel. The disks serve as flywheels for storage of angular momentum when the wind is blowing, and to keep grinding when it stops. Or the prime mover could be a gang of people on bicycles.

This could also produce topsoil for the 2009-2010 Architectural design prototype concept for growing Food in Highrise Towers(I sent out the whole plan which consisted of upside down pyramids with open and shut greenhouse latch windows and a gravel bed with drains that reuse the water from small overhead sprinklers, not that complicated, and light would be natural and/or piped in.The base was the most important feature of the design in that it was supposed to move with earth quake tremors, That is why it was made of four large granite tiers to support each floor and each one spanned out a little farther than the last and eventually formed a circle of tiers at the bottom,and at the top would be the largest floor because it would have the most tiers beneath it the top would have greenhouse glass roof that lets in small amounts of water).for where there is a limited space issues like China .ds