Given a global mindset that sees this waste as an expensive liability, it is all too common to neglect its potential value as a resource. As the saying goes, necessity is the mother of invention, and water scarce regions are driving the interest in wastewater reuse, particularly to expand marginal agricultural lands. However, pilot projects reveal a missed opportunity to utilize faecal sludge, particularly for rural areas and small towns. Human waste, as with all organic matter, contains nutrients, as well as thermal heat value, since it is combustible when dry.

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