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Fighting the Flush: Metropolis Next Generation Competition
Mathew and I entered Metropolis magazine’s competition for “one fix that will make a positive difference in the designed environment.” They had 292 applicants this year. We wrote up a proposal for a...
View Articlethe internet of decomposers
I’ve just installed an Arduino-based temperature logger at five points in our compost pile, proving the obvious: it’s hotter on the sunny side and hottest in the middle. Details tomorrow, but check...
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Monitoring Compost, pt.1 (what we’ve got)
There is no substitute for the complexity of human senses. Quantitative data is cannot stand in for direct experience with compost. But it does provide a means of directly comparing processes and...
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New Temperature Monitor
I’ve re-made the compost temp sensors to conform to our original design of stabbing probes. I was having difficulty choosing a non-conductive housing for the probes that could give accurate...
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New Instructable: DIY Moisture Test
Our problem: We need to know the % of moisture in each batch of manure to determine how much carbon material (sawdust, coffee hulls, etc) to add to achieve 50-60% moisture (typical ideal moisture for...
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Diagram of Types of Composting Toilets
Ah, at last I found the simplest illustration of types of composting toilets. It’s from a review of household dry sanitation practices around the globe put out by Toilettes du Monde in France. The full...
View ArticleThe 90s: US starts land applying sludge, Swizterland stops
In the 1990s, Switzerland banned the re-use of sludge for any agricultural purposes because of the high heavy metal and other persistent pollutants. Austria, and Sweden also banned such re-use. The...
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Portable Composting Toilets for Multi Day Events
The Cloacina Project with design and implementation from PNCA’s graduate students in Collaborative Design created an open source hardware platform for toilets, urinals, hand sinks and privacy screens...
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