A fellow SGC garden club member sent me a link to a video about the use of human manure in gardening. Once I got beyond the 'yuck' factor, I became quite curious about it's use and the collection process.
First, all manures need to be composted before they can safely be used in vegetable gardens. Fresh manures can be spread on gardens in Fall and Winter where they'll break down and become usable by the following growing season. However, it's best to use a 'hot'/thermophilic method to create a product that is free of harmful pathogens. Composting is a layering process where both green and brown materials are used, with moisture, to create internal heat in the pile to destroy harmful bacteria. Fresh cow, horse, chicken and ,yes, human manures are alternately layered with dry leaves and weeds or grass clippings, for example. What surprised me, though, was the suggestion that meats and fats could also be added to the compost pile. Everything that I had ever read in the past always vehemently cautioned against their use. According to this single source, if the pile becomes hot enough, these too will break down and become a nutrient source for the final composted product.
The collection methods for human manure vary. In China, human (and animal waste) are refered to as 'nightsoil'. Each evening, the household would empty the contents of their daily waste into a holding tank where it would ferment until usable. It would then be applied as a liquid form fertilizer to rainfed gardens (eg. vegetable, rice and wheat). In other countries(eg.,Canada and Europe), a sawdust toliet is used and the waste material collected and layered, according to traditional composting methods, with green and brown garden wastes. Here the pile heats up to kill the harmful bacteria and, when cooled, is spread on the gardens. With the constant addition of manure to your compost pile it will heat up and break down rather quickly, resulting in dark, humus-like compost (smelling of woodland!) in three to six months.
For an entertaining, informative and humorous approach to this subject, be sure to watch this video.
Happy gardening!!

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