Optimum recovery of phosphate from simulated wastewater by unseeded fluidized-bed crystallization process

The high organic material contained in wastewater released into the environment asresults of various sources of human activities, such as phosphorus, can cause eutrophication. Thestruvite crystallization in an aerated fluidized bed reactor is one of the methods which able toimprove the efficiency of phosphorus removal. In this study, a mixture of synthetic wastewaters andthe MgCl2 solution was treated in a fluidized bed reactor equipped with aeration to produce thestruvite which can be utilized as a slow release fertilizer. Subsequently, the effect of aeration atdifference influent flow rate was investigated to correlate with the changing of phosphorusconcentration in the reactor effluent. The experiments were conducted for 240 minutes with thevariation of aeration are 0.5 L/min to 1.5 L/min; variation of influent flow rate of syntheticwastewater is 150 ml/min to 350 ml/min, with a constant influent flow rate of MgCl2 solution is 50ml/min. These solutions were maintained at the condition of pH 9. The results showed that theoptimal efficiency of phosphor removal which accounted for 82.5% occurred when the aeration rateof 1.5 L/min in the influent flow rate of 150 ml/min. From these findings, it is revealed that theefficiency of P removal in wastewater is obtained by a crystallization process which utilizing anaerated fluidized bed reactor and by increasing the aeration rate and the reactants contact time.

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Fluorine removal and calcium fluoride recovery from rare-earth smelting wastewater using ﬂuidized bed crystallization process

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2019.03.050 ◽

2019 ◽

Vol 373 ◽

pp. 313-320 ◽

Cited By ~ 12

Author(s):

Guisheng Zeng ◽

Bo Ling ◽

Zhongjun Li ◽

Shenglian Luo ◽

Xinzhen Sui ◽

...

Keyword(s):

Rare Earth ◽

Fluidized Bed ◽

Calcium Fluoride ◽

Crystallization Process ◽

Smelting Wastewater

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Treatment of high-level arsenic-containing wastewater by fluidized bed crystallization process

Journal of Chemical Technology & Biotechnology ◽

10.1002/jctb.1671 ◽

2007 ◽

Vol 82 (3) ◽

pp. 289-294 ◽

Cited By ~ 14

Author(s):

Chihpin Huang ◽

Jill R Pan ◽

Maosung Lee ◽

Shihming Yen

Keyword(s):

Fluidized Bed ◽

Crystallization Process ◽

High Level

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Chemical precipitation at extreme fluoride concentration and potential recovery of CaF2 particles by fluidized-bed homogenous crystallization process

Chemical Engineering Journal ◽

10.1016/j.cej.2021.128917 ◽

2021 ◽

Vol 415 ◽

pp. 128917

Author(s):

Carl Francis Zulueta Lacson ◽

Ming-Chun Lu ◽

Yao-Hui Huang

Keyword(s):

Fluidized Bed ◽

Crystallization Process ◽

Fluoride Concentration ◽

Chemical Precipitation

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Biosorption of Cationic Dyes onto Cork Stopper Particles by Inverse Fluidized Bed

Association of Arab Universities Journal of Engineering Sciences ◽

10.33261/jaaru.2019.26.4.002 ◽

2019 ◽

Vol 26 (4) ◽

pp. 9-16

Author(s):

Israa A. Al.Joboury ◽

Shahlaa E. Ebrahime

Keyword(s):

Methylene Blue ◽

Fluidized Bed ◽

Low Cost ◽

Methyl Violet ◽

Cationic Dyes ◽

Cork Stopper ◽

Continuous Mode ◽

Biosorption Process ◽

Simulated Wastewater ◽

Inverse Fluidized Bed

In this study cork stopper particles was used as a low cost biosorbent to remove the cationic dyes (Methylene blue (MB), Malachite green (MG), and Methyl violet (MV)) from simulated wastewater. Continuous experiments were studied in a laboratory scale in inverse fluidized-bed packed with cork stopper particles for removal these dyes. A set of continuous mode experiments was carried out in inverse fluidized bed column to study the effect of flow rate (10, 15, 20 l/h), bed depth (5, 10, 15 cm), and influent concentration (10, 20, 30 mg/l) on the performance of biosorption process onto cork stopper particles. The minimum inverse fluidized velocity was calculated and it was found to be 8 ×10-5 m/s. The results indicate that cork adsorbs dyes efficiently and can be used as a low-cost alternative for the removal of cationic dyes in wastewater treatment.

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