Average Urine and Feces Volumes/Mass

The International Compost Sanitation Forum and Message Board: Humanure Handbook - A Guide to Composting Human Manure: Average Urine and Feces Volumes/Mass
Author: bekirk
Tuesday, February 08, 2005 - 12:09 pm
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Does anyone no of a resource for average volume and/or wet/dry mass of urine and/or feces daily or per use?

I'm tyring to consider possible options for source separation in a large building. The Urban Water folks in Sweden will be publishing a report soon, but I haven't found anything otherwise.

Cheers,

Barton

Author: admin
Wednesday, February 09, 2005 - 2:40 am
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Regarding average weight, according to the Humanure Handbook, 2nd edition, Chapter 4, page 92:

"According to King’s research, the average daily excreta of the adult human weighs in at 40 ounces. Multiplied by 250 million, a rough estimate of the current US population, Americans each year produce 1,448,575,000 pounds of nitrogen, 456,250,000 pounds of potassium, and 193,900,000 pounds of phosphorous. Almost all is discarded into the environment as a waste material or a pollutant, or as Dr. King puts it, 'poured into the seas, lakes or rivers and into the underground waters.'"

Author: Larry
Wednesday, February 09, 2005 - 8:56 pm
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Separating feces and urine appears to be used more often in Europe than elsewhere. I want to suggest for Barton's consideration the value of collecting both together for good composting action. About 90% of the nitrates are in the urine, and are important for achieving thermophillic temperatures. Feces and a bulking additive such as sawdust won't have enough nitrogen to heat up in a pile. Diverting urine does not solve any problems in my opinion, and reduces the effectiveness of composting humanure.

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