From Living Building Science
Revision as of 13:53, 20 April 2020 by Jvarner8
This page will describe the goals of the Greywater Wetland team as part of Georgia Tech's Living Building Science VIP Team. This subteam focuses on analyzing the efficiency of the greywater filtering system of the constructed wetland located at the front of the Kendeda Living Building, and using geochemical analysis to assess the efficiency of filtering of the building's greywater.
System of Study
The greywater system filters greywater from the Kendeda Building, and it releases the water back into the groundwater reservoirs. Greywater from the Kendeda Building includes water from sinks, showers, and water fountains. First, greywater is collected in a large cistern that is located in the back of the Kendeda Building. There, the greywater is stored temporarily. Water is gradually pumped uphill to the constructed wetland that is located in the front of the Kendeda Building. The water moves through the wetland horizontally and the water is filtered naturally by using sediment, gravel, and local aquatic plants.
List of plants in the constructed wetland :
- Sphoenoplectus tabernaemontani
- Softstem Bulrush
- Pontederia cordata
- Typha latifolia
- Broadleaf Cattail
- Arisaema triphyllum
- Jack in the Pulpit
- Lysmachia terrestris
- Swamp Candle
- Arden, S, and X Ma. “Constructed Wetlands for Greywater Recycle and Reuse: A Review.” Science of the Total Environment, vol. 630, 2018, pp. 587–599.
This is a review of a case study done to see if constructed wetlands meet the microbiological standards for water reuse. They measured pathogens, E. Coli, BOD, and other metrics. From their study, they concluded that the constructed wetland is unable to meet standards on its own. However, the wetland combined with ultraviolet radiation and chlorination could meet standards for water reuse.
- Carleton, J., Grizzard, T., Godrej, A., Post, H., Lampe, L., & Kenel, P. (2000). Performance of a Constructed Wetlands in Treating Urban Stormwater Runoff. Water Environment Research, 72(3), 295-304. Retrieved February 26, 2020, from www.jstor.org/stable/25045379
This study looked at the performance of constructed wetlands in northern Virginia of removing pollutants from stormwater runoff. More specifically, the study focused on stormwater runoff from a residential townhome complex. Researched collected data from 33 runoff events from April 1996 to May 1997, and results generally showed positive pollutant removal levels.