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Free water surface constructed wetlands for polishing sugar factory effluent in western Kenya : macrophyte phosphorus recovery and treatment results
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- Bodin, Hristina (författare)
- Linköpings universitet,Ekologi,Tekniska högskolan
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- Raburu, Phillip O. (författare)
- Department of Fisheries and Aquatic Sciences, Moi University, Eldoret, Kenya,Kenya
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- Tonderski, Karin S. (författare)
- Linköpings universitet,Biologi,Tekniska högskolan,Linköping University
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- (creator_code:org_t)
- 2006
- 2006
- Engelska.
- Ingår i: Proceedings of the 10th International Conference on Wetland Systems for Water Pollution Control, 23-29 September 2006. ; , s. 709-718
- Konferensbidrag (refereegranskat)
Abstract
Ämnesord
Stäng
- Wastewater treatment and nitrogen and phosphorus (P) recovery in harvested biomass of two macrophyte species receiving two wastewater loading rates was studied in a free water surface constructed wetland (FWS CW) in Kenya. Half the CWs were planted with Cyperus papyrus and half with Echinochloa pyramidalis. Inlets and outlets water samples were analysed for selected water quality parameters. Macrophytes were harvested at around 7 month intervals on three occasions for determination of biomass, P and N content. Area specific removals of TP, TSS and Nh4+-N were higher in the high-load CWs and in the low-load ones, but the relative removal was lower. For Nh4+-N, there was a significantly higher removal in C. papyrus CWs- Each macrophyte species had similar tissue P content independent of mass load suggesting excess available phosphorus in all CWs, as supported by the low N:P ratios. During a 7 month period, the amount of P stored daily in the green biomass of the macrophytes represented 18-29% and 25-100% of the daily removal of TP and TDP, respectively.
Nyckelord
- Free water surface wetland; Phosphorus removal; N uptake; P uptake; Cyperus papyrus; Echinochloa pyramidalis
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