Effect of Temperature and Plants on the Removal Efficiency of a Constructed Wetland Treating Secondary Piggery EffluentReport as inadecuate




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The water quality and biomass growth of a free water surface flow constructed wetland CW receiving secondary piggery effluent and stormwater runoff was monitored. The effects of plants and seasonal temperature changes on the removal efficiency of the CW were investigated. Average removal efficiency ranges were 30-35% for organic matters, 15-20% for nitrogen, and 30% for phosphorus. Based on the results, most of the pollutant removal efficiencies at temperature above 15°C were higher than at below 15°C. Among the water quality parameters, removal efficiencies of TKN, NH4-N and NO3-N indicated that differences in the two temperature ranges were significant. The mean proportion of biomass coverage to surface area of CW was from 0 to 10.8% during the macrophytes lifecycle. Since the plants that surrounded the cells of the CW were located outside the boundary of the water surface, low relationships between biomass and removal efficiency existed and therefore were not contributing much to the removal of pollutants.

KEYWORDS

FWS constructed wetland; removal efficiency; temperature; biomass

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Author: Soyoung Lee, Marla C. Maniquiz, Jiyeon Choi, Jeongyong Lee, Lee-Hyung Kim

Source: http://www.scirp.org/



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