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2009•Technology of Water TreatmentRequires access

EXPERIMENTAL STUDY OF HYBRID FLOW CONSTRUCTED WETLANDS TREATING DOMESTIC SEWAGE

Guangming Tian

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Abstract

The removal efficiency of COD, TP, TN and NH4+-N from domestic sewage under different hydraulic retention time (HRT, 3, 2 and 1d) in the stimulated hybrid flow wetlands was investigated. The results showed that the removal efficiency of COD, TP, TN and NH4+-N increased with the extending of HRT. When HRT was 3 days, COD, TP, TN and NH4+-N decreased 38.67%,79.83%,93.13% and 96.27%, respectively. In the wetland sys- tem, the reduction of TN and NH4+-N mainly centralized in the sector A and D of hybrid flow wetland system, while the removal of COD and TP were in the sector A and B. The removal efficiency of the stimulated wetland was better in the wastewater with higher pollutant concentrations than lower concentrations.

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What this paper is about

The removal efficiency of COD, TP, TN and NH4+-N from domestic sewage under different hydraulic retention time (HRT, 3, 2 and 1d) in the stimulated hybrid flow wetlands was investigated. The results showed that the removal efficiency of COD, TP, TN and NH4+-N increased with the extending of HRT. When HRT was 3 days, COD, TP, TN and NH4+-N decreased 38.67%,79.83%,93.13% and 96.27%, respectively. In the wetland sys- tem, the reduction of TN and NH4+-N mainly centralized in the sector A and D of hybrid flow wetland system, while the removal of COD and TP were in the sector A and B. The removal efficiency of the stimulated wetland was better in the wastewater with higher pollutant concentrations than lower concentrations.

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Available abstract

The removal efficiency of COD, TP, TN and NH4+-N from domestic sewage under different hydraulic retention time (HRT, 3, 2 and 1d) in the stimulated hybrid flow wetlands was investigated. The results showed that the removal efficiency of COD, TP, TN and NH4+-N increased with the extending of HRT. When HRT was 3 days, COD, TP, TN and NH4+-N decreased 38.67%,79.83%,93.13% and 96.27%, respectively. In the wetland sys- tem, the reduction of TN and NH4+-N mainly centralized in the sector A and D of hybrid flow wetland system, while the removal of COD and TP were in the sector A and B. The removal efficiency of the stimulated wetland was better in the wastewater with higher pollutant concentrations than lower concentrations.

Key concepts: Wetland, Hydraulic retention time, Sewage, Constructed wetland, Pollutant, Wastewater, Environmental engineering, Environmental science

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EXPERIMENTAL STUDY OF HYBRID FLOW CONSTRUCTED WETLANDS TREATING DOMESTIC SEWAGE — Research Paper | ScholarLens