Journal
WATER SCIENCE AND TECHNOLOGY
Volume 71, Issue 8, Pages 1263-1270Publisher
IWA PUBLISHING
DOI: 10.2166/wst.2015.102
Keywords
domestic wastewater treatment; hydraulic retention time; macrophyte type; pathogens removal; subsurface flow constructed wetlands; swine wastewater treatment
Funding
- Consejo Nacional de Ciencia y Tecnologia (CONACyT)
- Fondos Mixtos, Yucatan
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This study examined the performance of subsurface flow horizontal wetlands in total coliforms, faecal coliforms, enterococci and Salmonella removal from swine and domestic wastewaters. The effects of organic loading rate, contact time (CT) and the presence of aquatic macrophytes, Typha dominguensis and Typha latifolia, on treatment performance were evaluated. In general, chemical oxygen demand (COD) and total suspended solids (TSS) were reduced by 66 and 72% after 24 h and 75 and 84% after 48 h in domestic wastewaters, and 73 and 71% after 24 h and 72 and 78% after 48 h in swine wastewater. Total coliform and faecal coliform reductions of 70-83% and 65-78% were observed in the vegetated systems after 24 h of CT, while after 48 h, total coliform and faecal coliform reductions of 80-82% and 86-91% were noted.
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