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How can we improve sanitation and better manage human waste in low-income urban communities? Read the challenge brief

Inspiration

Refrigeration is Hot

Sanitation isn't sexy, unfortunately. But refrigeration? That seems to be a big thing here in Kumasi.
We've seen several households throughout our visit that have installed a refrigerator in their homes (often with nothing more than a bottle or two of water or coke inside), but have no access to a household toilet. And on a quick drive through town today we saw countless roadside refrigerator sales (selling second-hand refrigerators), all of whom seemed to be doing good business.


So why is refrigeration so hot (pardon the pun)? First, it's hot here. Really, really hot. So having a cold drink is pretty darn appealing. But, more relevant to our research, refrigerators are an aspirational purchase and seem to be associated with a higher social status. And lastly, refrigerator's benefits are clear and immediate – you plug it in and a little while later, your drinks are cold.


How might we design a sanitation system that's as easy to use and understand as a refrigerator? How might we make the benefits of household sanitation more immediate and relevant than the existing options? How might we make household sanitation as much of a status indicator as other aspirational purchases?

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December 04, 2010, 09:22AM
Remember, the leftovers from biogas production are clean, pathogen free composted fertilizer and some water. You are using the process of cleaning up the waste through bacterial action to produce clean burning fuel. Sanitation is accomplished by giving human and animal waste its proper place in the economy. The solution to most of the problems of poverty and pollution on this planet could be gained by simply cleaning up all human and much livestock waste in this way. When you add the energy potential of neighborhood scale fuel alcohol production from agriculture and food waste (NOT MADE FROM FOOD), you see how easy it could be to truly live well within our carbon budget.

Alcohol production also has byproducts of compost and water, with the addition of livestock feed (fermented fodder beets are highly regarded as feed for dairy cows), and even human food (Spent brewers grains make really good nutritious bread) Alcohol can be made from kelp farmed on polluted water to clean it up, or from food waste, or any number of non food plants with available sugars.When all leftover solids and liquids are returned to the soil after alcohol production, so is most of the carbon.
http://www.permaculture.com/ has information about the history and current state of fuel alcohol industry.
December 04, 2010, 02:05AM
When a toilet fuels the refrigerator, directly by household level biogas production, or indirectly through a centralized neighborhood gas to electricity plant, the toilet enables the aspiration of operating a refrigerator. I wonder if it would be possible to make that connection more direct for the user with incentives based on biogas program participation to reduce the price of a refrigerator and/or other tech that people want.

 It would be even better if the refrigerators were adsorption units powered by solar thermal. Turning heat directly into cold is such elegant tech! That would free up the energy produced as biogas for other uses such as lighting, fans, air compressors for power tools, and electricity for sewing machines.
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