Concurrent enhancement of oxygen transfer and phosphorus removal in constructed wetlands:A novel Irish case study
This paper describes a novel approach aimed at concurrently enhancing phosphorus(P) removal and oxygen transfer in constructed wetlands system(CWs).Alure sludge,a by-product of water treatment plants that uses alumirdam sulphate as coagulant was used as a phosphate removing substrate in a lab-scale CWs system employing the tidal flow mechanism.Concurrent and significant removal up to 71.8％(COD),90.6％(BODs),93.3％(reactive P.RP),97.6％(soluble reactive p.SRP)and 89.3％(SS)was achieved in the system.A treatment mechanism is suggested in which,the organic matter is physically transfefred from the wastewater to the wetland bed and then retained by sorption.Thereafter,biological oxidation takes place in two steps:firstly the hydrolysis and secondly,the oxidation step.A specific mathematical modelling approach for tidal flow CWs was adopted in this study in an attempt to enable the prediction of the treatment performance and assist in establishing a performance model.However,so far,the model can only be described as producing only a moderate fit between the predicted and the observed effluent values for COD and BOD5.
Alum sludge constructed wetlands mathematical modeling oxygen transfer phosphOrus tidal flow
A.O.BABATUNDE Y.Q.ZHAO
Centre for Water Resources Research,School of Architecture,Landscape and Civil Engineering,Newstead Building,University College Dublin,Belfield,Dublm 4,Ireland
国际会议
西安
英文
473-482
2008-05-15（万方平台首次上网日期，不代表论文的发表时间）