Kansas City’s Water Services department has generated $2.1 million in net income over the past six years by reusing human waste as fertiliser on its own city-run biofuel farm – turning an expense into a revenue generator.
This is really impressive news, taking biosolids from wastewater treatment and using them to add value. It is important to note that the biosolids are not used in the food chain, but instead get used for biofuel. This has led to marked increases in income from the treated land.
A similar programme is undertaken in Western Australia by the Water Corporation, however biosolids are used in a broader range of applications including forestry, compost and direct spreading in agriculture (each for different types of biosolids). More on the Water Corporation's work in biosolids at http://www.watercorporation.com.au/B/biosolids.cfm