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Reverse osmosis brine for phosphorus recovery from source separated urine.
- Source :
-
Chemosphere . Dec2016, Vol. 165, p202-210. 9p. - Publication Year :
- 2016
-
Abstract
- Phosphorus (P) recovery from waste streams has recently been recognized as a key step in the sustainable supply of this indispensable and non-renewable resource. The feasibility of using brine from a reverse osmosis (RO) membrane unit treating cooling water as a precipitant for P recovery from source separated urine was evaluated in the present study. P removal efficiency, process parameters and precipitate properties were investigated in batch and continuous flow experiments. More than 90% of P removal was obtained from both undiluted fresh and hydrolyzed urines by mixing with RO brine (1:1, v/v) at a pH over 9.0. Around 2.58 and 1.24 Kg of precipitates could be recovered from 1 m 3 hydrolyzed and fresh urine, respectively, and the precipitated solids contain 8.1–19.0% of P, 10.3–15.2% of Ca, 3.7–5.0% of Mg and 0.1–3.5% of ammonium nitrogen. Satisfactory P removal performance was also achieved in a continuous flow precipitation reactor with a hydraulic retention time of 3–6 h. RO brine could be considered as urinal and toilet flush water despite of a marginally higher precipitation tendency than tap water. This study provides a widely available, low - cost and efficient precipitant for P recovery in urban areas, which will make P recovery from urine more economically attractive. [ABSTRACT FROM AUTHOR]
- Subjects :
- *REVERSE osmosis
*URINE
*PHOSPHORUS
*PRECIPITATION (Chemistry)
*CITIES & towns
Subjects
Details
- Language :
- English
- ISSN :
- 00456535
- Volume :
- 165
- Database :
- Academic Search Index
- Journal :
- Chemosphere
- Publication Type :
- Academic Journal
- Accession number :
- 118542988
- Full Text :
- https://doi.org/10.1016/j.chemosphere.2016.09.037