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1 March 2000 Nutrient Removal in a Vertical Upflow Wetland in Piracicaba, Brazil
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Abstract

Vertical upflow wetland systems have shown high nutrient removal efficiencies. The removal of nutrients (N and P) from wastewater was investigated in a vertical upflow wetland system in Piracicaba, Brazil. The concentration removal was 93% for phosphate, 78% for nitrate and 50% for ammonia. Effective phosphate removal was observed in the top soil layer which has a high surface adsorption area. Nitrate was removed satisfactory at low loading rates due to plant uptake and denitrification. Removal of ammonia was concentration dependent and decreased at high inflow concentrations. Spatial sampling through the bed showed that the treatment efficiency was not uniform. The possibility of the recycling of nutrients as a soil improver or animal feed is an important feature of this type of vertical flow wetland system.

Neda Farahbakhshazad, Gregory M. Morrison, and Eneas Salati Filho "Nutrient Removal in a Vertical Upflow Wetland in Piracicaba, Brazil," AMBIO: A Journal of the Human Environment 29(2), 74-77, (1 March 2000). https://doi.org/10.1579/0044-7447-29.2.74
Received: 22 April 1999; Accepted: 1 June 1999; Published: 1 March 2000
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