In part 1(1) of this article I explored a little into why humanure is beneficial to the planet, including the need to replenish our aquifers and for people to have access to safe drinking water, the high phosphorous content of human poo compared to the finite and dwindling supply of phosphate rock as an agricultural product, and the reconnection of the ‘human nutrient cycle’ (2). In this part I will look more deeply into the different ways you can safely use humanure, and make some practical suggestions for beginning the process of redressing the human nutrient balance, even while we live within an unbalanced system.
Ways to deal with our crap
In ‘The Humanure Handbook’ (2) , Joseph Jenkins points out that we as a species have four different ways to deal with human excrement:
- To treat it as a waste product and dispose of it – this includes all water-based sanitation techniques such as flush toilets. As mentioned in part 1, this method ends up contaminating water even if the sewage is later treated, exacerbates the spread of water-borne diseases, and ignores the principle of ‘Produce No Waste’.
- To use it unprocessed in agriculture – at the time of the Handbook’s publication (1999) this was apparently still a common practice in parts of Asia (2). As you may guess, spreading unprocessed human waste on fields can be quite a large health risk because of the pathogens which are present in fresh humanure. This practice, euphemistically known as ‘night soil collection’ (3) , has apparently now been banned in many countries although there are some reports of people continuing to use fresh human waste, or ‘faecal sludge’ on their crops, for example in India (4) .
…click on the above link to read the rest of the article…