کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4484863 | 1316934 | 2009 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Experimental assessment and modelling of the proton production linked to phosphorus release and uptake in EBPR systems Experimental assessment and modelling of the proton production linked to phosphorus release and uptake in EBPR systems](/preview/png/4484863.png)
The modelling of the enhanced biological phosphorus removal (EBPR) process is a recent focus of interest. The pH profile is a promising output variable for EBPR modelling as it is very sensitive to the consumption or production of acid and base species (e.g. phosphate or VFA). pH-based EBPR modelling is based on the assumption that phosphorus is released and taken up as H2PO4−, but this assumption has not been experimentally confirmed yet with enriched EBPR biomass. Therefore, the objective of this work was to assess the species in which P is released and taken up under different pH conditions. Several batch experiments were performed with an enriched culture of Accumulibacter (around 70 ± 10% of total microorganisms). The total observed proton production, inorganic carbon, ammonium, phosphate and VFA were measured to evaluate the titrimetric contribution of anaerobic P-release and aerobic P-uptake over the total observed proton production. The results show that the only phosphorus form involved in P-release and P-uptake is equivalent in terms of proton production to H2PO4− in the pH range of 6.5–8.5. Finally, proton production and pH in several SBR cycles were modelled and resulted in good agreement with the experimental profiles.
Journal: Water Research - Volume 43, Issue 9, May 2009, Pages 2431–2440