کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
680421 | 1459973 | 2014 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Direct phosphorus recovery from municipal wastewater via osmotic membrane bioreactor (OMBR) for wastewater treatment Direct phosphorus recovery from municipal wastewater via osmotic membrane bioreactor (OMBR) for wastewater treatment](/preview/png/680421.png)
• Direct phosphorus recovery from municipal wastewater.
• Sequesters phosphorus at the beginning of wastewater treatment.
• Obviates the need for biological phosphorus removal.
• Phosphorus recovery without addition of Mg2+ and Ca2+.
• Potential complete phosphorus recovery from municipal wastewater.
This work reports, for the first time, a new approach to direct phosphorus recovery from municipal wastewater via an osmotic membrane bioreactor (OMBR). In the OMBR, organic matter and NH4+ were removed by biological activities. PO43−, Ca2+, Mg2+ and unconverted NH4+ were rejected by the forward osmosis (FO) membrane and enriched within the bioreactor. The resultant phosphorus-rich supernatant was then used for phosphorus recovery. By adjusting the pH to 8.0–9.5, PO43− was recovered via precipitation with Ca2+, Mg2+ and NH4+. The OMBR showed up to 98% overall removal of TOC and NH4+-N. At pH 9.0, more than 95% PO43−-P was recovered without addition of magnesium and calcium. The precipitates were predominantly amorphous calcium phosphate (ACP) with phosphorus content >11.0%. In principal, this process can recover almost all the phosphorus, apart from the portion assimilated by bacteria. The global phosphorus recovery efficiency was shown to be 50% over 84 days.
Figure optionsDownload as PowerPoint slide
Journal: Bioresource Technology - Volume 170, October 2014, Pages 221–229