Multiple Uses

Wastewater reuse relies on the principle that different water uses have different water quality requirements, and that wastewater is often of high enough quality for certain reuse purposes. This can include direct reuse of rainwater, greywater, or process water in industries, or of organic waste for energy or nutrients. It can also include wastewater that must be treated prior to reuse, such as blackwater, yellow water, or brownwater. Reusing wastewater can reduce water consumption as well as make use of valuable resources (nutrients, energy) contained in wastewater.