A comparative study of phosphate removal technologies using adsorption and fluidized bed crystallization process

2011 ◽  
Vol 32 (1-3) ◽  
pp. 351-356 ◽  
Author(s):  
Yao-Hui Huang ◽  
Yu-Jen Shih ◽  
Chun-Chi Chang ◽  
Shun-Hsing Chuang
Keyword(s):  
Comparative Study ◽  
Fluidized Bed ◽  
Crystallization Process ◽  
Phosphate Removal ◽  
Removal Technologies

A comparative study of electrostatic current and pressure signals in a MSFC gas–solid fluidized bed

2016 ◽  
Vol 287 ◽  
pp. 292-300 ◽  
Author(s):  
Qing Zhang ◽  
Kezeng Dong ◽  
Yefeng Zhou ◽  
Zhengliang Huang ◽  
Zuwei Liao ◽  
...  
Keyword(s):  
Comparative Study ◽  
Fluidized Bed

Phosphate removal in real anaerobic supernatants: modelling and performance of a fluidized bed reactor

1998 ◽  
Vol 38 (1) ◽  
pp. 275-283 ◽  
Author(s):  
P. Battistoni ◽  
P. Pavan ◽  
F. Cecchi ◽  
J. Mata-Alvarez
Keyword(s):  
Fluidized Bed ◽  
Contact Time ◽  
Fluidized Bed Reactor ◽  
Phosphate Removal ◽  
Plant Design ◽  
Air Stripping ◽  
And Performance ◽  
Ph Range ◽  
Very High ◽  
A2o Process

Phosphate removal in anaerobic supernatant coming from a centrifugation sludge station of an A2O process is studied. A fluidized bed reactor is employed to crystallize phosphate as hydroxyapatite or struvite using only air stripping to reach the supersaturation pH. The classic composition of supernatant (alkalinity 3550 mgCaCO3/l, PO4 139 mg/l, Mg 24 mg/l) does not require any addition of chemicals for phosphate removal. Seventeen runs are performed in a bench scale FBR obtaining very high conversion and removal efficiency and phosphate loss in the effluent ≤3.5%. The use of Ca or Mg enriched supernatant has no meaningful influence on efficiency, but it determines the prevalent salt formed between MAP or HAP. Efficiency can be related to pH and sand contact time in a double saturational model. The half efficiency constants: 0.075 h for t and 7.75 pH, have an important role in the process knowledge and optimization of plant design. Exhaust sand analysis indicates the same composition at the top, bottom and mean of the sand bed (39% mol MAP and 61% mol HAP). This result together with the high half efficiency constant for contact time indicate that the phosphate growth on the bed is not competitive. Finally, the phosphate release from the plant is studied. Results show a weak release rate, equivalent to 2.8-10% d−1 phosphate as MAP, obtained at an operative pH range of 8.1-8.4.

Comparative Study of Combustion Properties of Two Seaweeds in a Batch Fluidized Bed

2018 ◽  
Vol 190 (5) ◽  
pp. 755-769 ◽  
Author(s):  
Shuang Wang ◽  
Bin Cao ◽  
Abd El-Fatah Abomohra ◽  
Yamin Hu ◽  
Qian Wang ◽  
...  
Keyword(s):  
Comparative Study ◽  
Fluidized Bed ◽  
Combustion Properties
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