Abstract
In this study, a fluidized bed reactor was used to compare heterogeneous and homogeneous crystallization for recovering magnesium ammonia phosphate (MAP) from the dewatering filtrate at a municipal water resource recovery facility. Investigating the factors affecting crystallization revealed that pH exerted a greater effect than the Mg/P molar ratio. The results of a heterogeneous crystallization experiment showed that removal efficiency of phosphate (RP%) and crystal efficiency of phosphate (CP%) were 68% and 66%, respectively, at a PO4-P concentration of 200 mg/L, pH of 8.0, and Mg/P molar ratio of 1.0 for 3 h. The reaction rate of heterogeneous crystallization was markedly higher than that of homogeneous crystallization. Those pellets produced through the heterogeneous crystallization exhibited a dense surface (particle size 0.5-1.0 mm; water content 8.7%). Through scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDS), and X-ray diffraction (XRD) examination, the crystallized patterns of the needle-shaped pellets were identified as MgNH4PO4·6H2O.
| Original language | English |
|---|---|
| Pages (from-to) | 783-789 |
| Number of pages | 7 |
| Journal | Water Environment Research |
| Volume | 90 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2018 Sep 1 |
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All Science Journal Classification (ASJC) codes
- Environmental Chemistry
- Ecological Modelling
- Water Science and Technology
- Waste Management and Disposal
- Pollution
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A comparison of heterogeneous/ homogeneous crystallization for phosphate recovery from biosolids. / Lin, Nan Hung; Hsieh, Yung Hsu; Chuang, Shun Hsing; Wu, Chun Hao; Huang, Yao Hui.
In: Water Environment Research, Vol. 90, No. 9, 01.09.2018, p. 783-789.Research output: Contribution to journal › Article
TY - JOUR
T1 - A comparison of heterogeneous/ homogeneous crystallization for phosphate recovery from biosolids
AU - Lin, Nan Hung
AU - Hsieh, Yung Hsu
AU - Chuang, Shun Hsing
AU - Wu, Chun Hao
AU - Huang, Yao Hui
PY - 2018/9/1
Y1 - 2018/9/1
N2 - In this study, a fluidized bed reactor was used to compare heterogeneous and homogeneous crystallization for recovering magnesium ammonia phosphate (MAP) from the dewatering filtrate at a municipal water resource recovery facility. Investigating the factors affecting crystallization revealed that pH exerted a greater effect than the Mg/P molar ratio. The results of a heterogeneous crystallization experiment showed that removal efficiency of phosphate (RP%) and crystal efficiency of phosphate (CP%) were 68% and 66%, respectively, at a PO4-P concentration of 200 mg/L, pH of 8.0, and Mg/P molar ratio of 1.0 for 3 h. The reaction rate of heterogeneous crystallization was markedly higher than that of homogeneous crystallization. Those pellets produced through the heterogeneous crystallization exhibited a dense surface (particle size 0.5-1.0 mm; water content 8.7%). Through scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDS), and X-ray diffraction (XRD) examination, the crystallized patterns of the needle-shaped pellets were identified as MgNH4PO4·6H2O.
AB - In this study, a fluidized bed reactor was used to compare heterogeneous and homogeneous crystallization for recovering magnesium ammonia phosphate (MAP) from the dewatering filtrate at a municipal water resource recovery facility. Investigating the factors affecting crystallization revealed that pH exerted a greater effect than the Mg/P molar ratio. The results of a heterogeneous crystallization experiment showed that removal efficiency of phosphate (RP%) and crystal efficiency of phosphate (CP%) were 68% and 66%, respectively, at a PO4-P concentration of 200 mg/L, pH of 8.0, and Mg/P molar ratio of 1.0 for 3 h. The reaction rate of heterogeneous crystallization was markedly higher than that of homogeneous crystallization. Those pellets produced through the heterogeneous crystallization exhibited a dense surface (particle size 0.5-1.0 mm; water content 8.7%). Through scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDS), and X-ray diffraction (XRD) examination, the crystallized patterns of the needle-shaped pellets were identified as MgNH4PO4·6H2O.
UR - http://www.scopus.com/inward/record.url?scp=85053334944&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85053334944&partnerID=8YFLogxK
U2 - 10.2175/106143017X15131012153211
DO - 10.2175/106143017X15131012153211
M3 - Article
C2 - 30208994
AN - SCOPUS:85053334944
VL - 90
SP - 783
EP - 789
JO - Water Environment Research
JF - Water Environment Research
SN - 1061-4303
IS - 9
ER -