NDLI: Hydrologic and Environmental Performance of a Subsurface Constructed Wetland at a Highway Rest Area: A Case Study

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Hydrologic and Environmental Performance of a Subsurface Constructed Wetland at a Highway Rest Area: A Case Study

Content Provider	Springer Nature Link
Author	Kao, Shih Chieh Chan, Ting Pong Sultana, Rebeka Konopka, Thomas Cooper, Thomas Partridge, Barry Govindaraju, Rao S.
Copyright Year	2009
Abstract	On-site treatment of wastewater at highway rest areas poses some unique and difficult challenges because of the rural locale, high variability in wastewater flow rate and strength, and lack of knowledgeable personnel on-site. As a potential alternative, a constructed subsurface wetland system was built at the I-70 rest stop nearby Greenfield, Indiana, in 2003. This wetland system, mainly composed of three wetland cells, also includes draw-and-fill and recirculation mechanisms to increase oxygen transfer to the wastewater and improve the overall treatment performance. This study summarizes the project experience after several years of system operation. Special considerations for highway rest areas have been emphasized. A dynamic hydraulic model was developed to help characterize the flows in the system and estimate the hydraulic retention time. The size of the Greenfield wetland was found to be sufficient in providing pretreatment that could help avoid potential surcharge from the local treatment plant, but was inadequate for direct on-site discharge. Though the draw-and-fill and recirculation mechanisms provided some treatment benefits, they raised the construction costs and maintenance needs. Constructed wetlands have been described as low-maintenance systems compared to other conventional wastewater treatment approaches, but proper maintenance of the wetland facilities was found to be a key factor in achieving good performance. Since wetland systems in highway rest areas have not been studied, this study expects to provide useful information for possible future implementation of such systems.
Starting Page	35
Ending Page	48
Page Count	14
File Format	PDF
ISSN	18761658
Journal	Exposure and Health
Volume Number	1
Issue Number	1
e-ISSN	18761666
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-02-03
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Wastewater treatment Wetland Highway rest areas Recirculation system Environmental Health Pollution Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Pollution Health, Toxicology and Mutagenesis Public Health, Environmental and Occupational Health Water Science and Technology

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