Re-use of recovered water
Grey Water Recycling refers to water that is recovered as a by-product of cleaning and other uses in the building and then reused in the same functions or other purposes like garden irrigation.
Care must also be taking to ensure that the recycled water does not contain harmful toxins that may present a health and safety risk to your building users and the environment. These contaminants typically include bacteria, suspended and/or, dissolved solids, acids, alkalises and synthetic bacteria. The Water Act in South Africa (1998), states that it is illegal to discharge contaminated wastewater to the sewerage and storm water systems.
The Grey Water recycling system is made up of one or more tanks that includes a filtration system. The size is dependent on what process is needed to recycle the water and how much water can be recycled. Systems are available for all types of buildings. A well designed piping system serviced by a pump will ensure that the system works economically. Depending on the water flow rate, some systems employ mechanical filtration to remove the suspended dirt to protect downstream equipment such as valves. If needed, additional treatment to remove or protect specific Greywater contents may include sand filtration, bleach, ozone or UV light.