A comparison of heterogeneous/ homogeneous crystallization for phosphate recovery from biosolids

Nan Hung Lin, Yung Hsu Hsieh, Shun Hsing Chuang, Chun Hao Wu, Yao Hui Huang

Research output: Contribution to journalArticle

1 Citation (Scopus)

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 MgNH4PO6H2O.

Original languageEnglish
Pages (from-to)783-789
Number of pages7
JournalWater Environment Research
Volume90
Issue number9
DOIs
Publication statusPublished - 2018 Sep 1

Fingerprint

Biosolids
biosolid
Crystallization
Phosphates
crystallization
phosphate
Recovery
Dewatering
dewatering
Water resources
Ammonia
Needles
Fluidized beds
reaction rate
Magnesium
Water content
Reaction rates
comparison
Energy dispersive spectroscopy
magnesium

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Ecological Modelling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

Cite this

Lin, Nan Hung ; Hsieh, Yung Hsu ; Chuang, Shun Hsing ; Wu, Chun Hao ; Huang, Yao Hui. / A comparison of heterogeneous/ homogeneous crystallization for phosphate recovery from biosolids. In: Water Environment Research. 2018 ; Vol. 90, No. 9. pp. 783-789.
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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 journalArticle

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