Constructed Wetlands
Graywater Systems
Soak it up
Wetland plants transpire large amounts of water (10+ gallons /day on warm days),so usually Constructed Wetlands are appropriate where there is excessive graywater and little irrigation demand or soilspace to use other infiltration system. Wetland plants remove nutrients and can help filter pollution out of wastwater and are used in large scale wastewater treatment plants as well. Gravel and other aggregate beds can ultimately suffer clogging problems/overflowing of graywater requiring replacement or flushing.
Photo credit: Greywater Action
A Plant/Soil Filter
Greywater from bath tubs, showers, sinks, and washing machines enters a plant-covered soil filter where it undergoes biological treatment. Extensive investigations over several years of operation show that within the soil filter, E. coli concentrations are reduced by up to 99%. .
