Mathematical model for a three-phase fluidized bed biofilm reactor in wastewater treatment

A three-phase, liquid-fluidized-bed biofilm reactor was operated over wide ranges of liquid velocity, air velocity, medium concentration, and substrate surface loading. The biofilm characteristics (total colonization, polysaccharide content, density, and thickness) and the specific detachment coefficient (bs) were determined by a combination of experimental measurements and a hydrodynamic model. The results demonstrated that dense and thin biofilms were induced by the physical condition of high particle-to-particle contacts and high liquid turbulence. The biofilm's polysaccharide content was increased by increased air turbulence and a low substrate availability. The specific detachment coefficient, bs, was strongly correlated to the concentration of the medium (negatively) and the polysaccharide content (positively). Overall, the bs can be controlled significantly by the gas and liquid velocities; increasing either velocity tends to increase bs.

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Starch Wastewater Treatment in a Three Phase Fluidized Bed Bioreactor with Low Density Biomass Support

Journal of Applied Sciences and Environmental Management ◽

10.4314/jasem.v11i3.55138 ◽

2010 ◽

Vol 11 (3) ◽

Author(s):

M Rajasimman ◽

C Karthikeyan

Keyword(s):

Wastewater Treatment ◽

Fluidized Bed ◽

Low Density ◽

Fluidized Bed Bioreactor ◽

Three Phase ◽

Starch Wastewater

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Fluidized bed biofilm reactor for wastewater treatment

Bioproducts - Advances in Biochemical Engineering/Biotechnology ◽

10.1007/bfb0002455 ◽

2005 ◽

pp. 131-169 ◽

Cited By ~ 37

Author(s):

Wen K. Shieh ◽

John D. Keenan

Keyword(s):

Wastewater Treatment ◽

Fluidized Bed ◽

Biofilm Reactor

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Aquaculture Wastewater Treatment by Using Three Phase Fluidized Bed Process with Draft Tube.

Journal of Japan Society on Water Environment ◽

10.2965/jswe.23.101 ◽

2000 ◽

Vol 23 (2) ◽

pp. 101-107

Author(s):

Jeongsook KIM ◽

Yuhei INAMORI ◽

Shijun KIM

Keyword(s):

Wastewater Treatment ◽

Fluidized Bed ◽

Draft Tube ◽

Three Phase ◽

Aquaculture Wastewater ◽

Fluidized Bed Process

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A novel fast mass transfer anaerobic inner loop fluidized bed biofilm reactor for PTA wastewater treatment

Water Science & Technology ◽

10.2166/wst.2016.285 ◽

2016 ◽

Vol 74 (5) ◽

pp. 1088-1095 ◽

Cited By ~ 2

Author(s):

Yingwen Chen ◽

Jinlong Zhao ◽

Kai Li ◽

Shitao Xie

Keyword(s):

Mass Transfer ◽

Wastewater Treatment ◽

Fluidized Bed ◽

Terephthalic Acid ◽

Oxygen Demand ◽

Biofilm Reactor ◽

Stable Chemical ◽

Start Up ◽

Operation Stability ◽

Purified Terephthalic Acid

In this paper, a fast mass transfer anaerobic inner loop fluidized bed biofilm reactor (ILFBBR) was developed to improve purified terephthalic acid (PTA) wastewater treatment. The emphasis of this study was on the start-up mode of the anaerobic ILFBBR, the hydraulic loadings and the operation stability. The biological morphology of the anaerobic biofilm in the reactors was also analyzed. The anaerobic column could operate successfully for 46 days due to the pre-aerating process. The anaerobic column had the capacity to resist shock loadings and maintained a high stable chemical oxygen demand (COD) and terephthalic acid removal rates at a hydraulic retention time of 5–10 h, even under conditions of organic volumetric loadings as high as 28.8 kg COD·m−3.d−1. The scanning electron microscope analysis of the anaerobic carrier demonstrated that clusters of prokaryotes grew inside of pores and that the filaments generated by pre-aeration contributed to the anaerobic biofilm formation and stability.

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