Hybrid Systems

In 1989, researchers at N.C. State University began evaluating constructed wetlands and their use with soil filters for wastewater treatment. Combinations of human-made environments, such as these, are known as hybrid or combination systems.

The Triangle School Wastewater Treatment System is a hybrid system in which wastewater is not only treated, but water and nutrients are reclaimed and RECYCLED.

The hill/marsh system below is an example of a hybrid system in which the hill acts as a soil filter and the marsh as a wetland. The Triangle School uses this combination with an innovative, space-saving scheme in which the soil filter (hill) is stacked on top of the wetland (marsh).

North Carolina State University researchers are studying eight domestic systems in Craven, Pamlico, and Gates counties in which hybrid systems have been installed for treatment only, with no recycling of water or resources.

Scientists continue to experiment with these and other designed ecosystems to find combinations which will improve the treatment of nutrients and pollutants.

Hill/Marsh drawing and text reference: House and Broome. 1990.