UA SWES 574 - Constructed Wetlands and Wastewater Treatment (8 pages)

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Constructed Wetlands and Wastewater Treatment



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Constructed Wetlands and Wastewater Treatment

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Pages:
8
School:
University of Arizona
Course:
Swes 574 - Aquatic Plants and the Environment
Aquatic Plants and the Environment Documents

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Constructed Wetlands and Wastewater Treatment Scott Stine SWES 574 Types of Constructed Wetlands Surface Flow Wetlands SF similar to natural wetlands free floating emergent and submerged plants are used Subsurface Flow Wetlands SSF water flows below surface of support media emergent plants that are tolerant of water saturated soils are used Wastewater Treatment Uses Additional Secondary Treatment Tertiary Treatment Onsite Wastewater Treatment alternative to municipal sewage treatment used in animal feeding operations Microorganisms Bacteria Coliforms Enterococci C perfringens Viruses Coliphage Parasites Cryptosporidium Giardia Removal Processes Most processes are enhanced by vegetation Processes include Filtration Adsorption Predation UV light Sedimentation SSF vs SF What are the objectives of the constructed wetland Some considerations SSF remove pathogens more efficiently than SF SF allow more biodiversity and habitats SSF minimize pests such as mosquitoes Concerns Some bacteria are able to reproduce on some plant surfaces Enterococci Spore forming pathogens may be released by precipitation Cryptosporidium Giardia



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