The Bed Depth Service Time Design Method for Deep Bed Filtration

A continuous adsorption study in a fixed-bed column was carried out using Multi-walled Carbon Nanotubes derived from Rosmarinus officinalis oil as an adsorbent for removing the textile dye Acid blue 40 from an aqueous solution. The adsorbent, MWNTs were prepared from Rosmarinus officinalis oil as a precursor to Fe/Mo catalyst supported on silica at 650 ºC under N2 atmosphere by spray pyrolysis process characterized by scanning electron microscopy, Transmission Electron microscopy, and Raman spectroscopy. The effects of adsorbent bed height (2–6 cm), initial ion concentration (20– 60 mg/L), and flow rate (10–30 mL/min) on the column performance were analyzed. The breakthrough curve was analyzed using the mathematical models of Thomas, Yoon-Nelson, and bed depth service time. The Thomas model at different conditions defined the behaviors of the breakthrough curves. The bed depth service time model showed good agreement with the experimental data. The high values of correlation coefficients (R2 0.9875) obtained indicate the validity of the bed depth service time model for the present column system.

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Bed depth service time model for the biosorption of reactive red dye using thePortunus sanguinolentusshell

Asia-Pacific Journal of Chemical Engineering ◽

10.1002/apj.408 ◽

2009 ◽

pp. n/a-n/a ◽

Cited By ~ 1

Author(s):

P.E. JagadeeshBabu ◽

Ram Krishnan ◽

Mandeep Singh

Keyword(s):

Service Time ◽

Time Model ◽

Red Dye ◽

Bed Depth Service Time

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Study of a fixed-bed column in the adsorption of an azo dye from an aqueous medium using a chitosan–glutaraldehyde biosorbent

Adsorption Science & Technology ◽

10.1177/0263617416688021 ◽

2017 ◽

Vol 36 (1-2) ◽

pp. 215-232 ◽

Cited By ~ 19

Author(s):

Jaime López-Cervantes ◽

Dalia I Sánchez-Machado ◽

Reyna G Sánchez-Duarte ◽

Ma A Correa-Murrieta

Keyword(s):

Flow Rate ◽

Service Time ◽

Fixed Bed ◽

Textile Dye ◽

Time Model ◽

Fixed Bed Column ◽

Bed Height ◽

Direct Blue ◽

Direct Blue 71 ◽

Bed Depth Service Time

A continuous adsorption study in a fixed-bed column was carried out using a chitosan–glutaraldehyde biosorbent for the removal of the textile dye Direct Blue 71 from an aqueous solution. The biosorbent was prepared from shrimp shells and characterized by scanning electron microscopy, X-ray diffraction, and nuclear magnetic resonance spectroscopy. The effects of chitosan–glutaraldehyde bed height (3–12 cm), inlet Direct Blue 71 concentration (15–50 mg l−1), and feed flow rate (1–3 ml min−1) on the column performance were analyzed. The highest bed capacity of 343.59 mg Direct Blue 71 per gram of chitosan–glutaraldehyde adsorbent was obtained using 1 ml min−1 flow rate, 50 mg l−1 inlet Direct Blue 71 concentration, and 3 cm bed height. The breakthrough curve was analyzed using the Adams–Bohart, Thomas, and bed depth service time mathematical models. The behaviors of the breakthrough curves were defined by the Thomas model at different conditions. The bed depth service time model showed good agreement with the experimental data, and the high values of correlation coefficients (R2 ≥ 0.9646) obtained indicate the validity of the bed depth service time model for the present column system.

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TREATMENT OF FLUORIDE BEARING CONTAMINATED WATER USING SIMULTANEOUS ADSORPTION AND BIODEGRADATION IN A LABORATORY SCALE UP: FLOW BIO-COLUMN REACTOR BY JAVA PLUM SEED

Asian Journal of Pharmaceutical and Clinical Research ◽

10.22159/ajpcr.2016.v9s3.14136 ◽

2016 ◽

Vol 9 (9) ◽

pp. 331 ◽

Cited By ~ 1

Author(s):

Tej Pratap Singh ◽

Sanjoy Ghosh ◽

Majumder Cb

Keyword(s):

Acinetobacter Baumannii ◽

Residence Time ◽

Flow Rate ◽

Service Time ◽

Design Model ◽

Contaminated Water ◽

Column Reactor ◽

Simultaneous Adsorption ◽

Bed Depth Service Time ◽

Empty Bed Residence Time

ABSTRACTObjective: Here, we aimed for the treatment of fluoride bearing contaminated water using simultaneous adsorption and biodegradation in a biocolumnreactor by using java plum seed.Methods: We immobilized Acinetobacter baumannii bacteria on the java plum seed in the bio-column reactor. The water used contained a sample offluoride with concentration of 20 mg/L. The bed depth service time design model and empty bed residence time were used to analyze the performance thebio-column. We examined and observed closely the effect of different operating parameters such as flow rate of bed depth and initial concentration on thissimplified bio-column reactor design model. Desorption experiment was conducted to evaluate the possibilities of regeneration and to reutilize of media.Results: We observed that the bio-column reactor is capable to reduce the concentration of the pollutants in the effluent water below their permissiblelimit. Reduction in DO along the bed height of the reactor was also observed, which supports the aerobic nature of the bacteria.Conclusion: The experimental results were encouraging and indicate that java plum (Syzygium cumini) seed is a feasible option to use as a biosorbentto remove fluoride in the bio-column reactor.Keywords: Bio-reactor, Simultaneous adsorption and biodegradation, Flow rate, Acinetobacter baumannii MTCC 11451, Physicochemical adsorption,Bed depth service time, Empty bed residence time.

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Uranium Dynamic Adsorption Breakthrough Curve onto Rice Straw Based Activated Carbon Using Bed Depth Service Time Model

BioResources ◽

10.15376/biores.13.4.9143-9157 ◽

2018 ◽

Vol 13 (4) ◽

Cited By ~ 1

Author(s):

Sobhy Mostafa Ebrahim Yakout ◽

Ahmed Abdelsattar Abdeltawab ◽

Khalid Elhindi ◽

Ahmed Askalany

Keyword(s):

Activated Carbon ◽

Rice Straw ◽

Service Time ◽

Breakthrough Curve ◽

Dynamic Adsorption ◽

Time Model ◽

Bed Depth Service Time

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Fixed-Bed Adsorption of Dyes on Bagasse Pith

Adsorption Science & Technology ◽

10.1177/026361749801600804 ◽

1998 ◽

Vol 16 (8) ◽

pp. 623-639 ◽

Cited By ~ 11

Author(s):

G. McKay ◽

T.F. Yee ◽

M.M. Nassar ◽

Y. Magdy

Keyword(s):

Service Time ◽

Sugar Cane ◽

Fixed Bed ◽

Breakthrough Curves ◽

Time Model ◽

Fixed Bed Adsorption ◽

Basic Dyes ◽

Bagasse Pith ◽

Fixed Beds ◽

Bed Depth Service Time

The adsorption of a number of basic dyes on to bagasse pith has been studied using fixed-bed adsorption. Pith is a waste material produced from the crushed cane (depithing operation) during the extraction of sugar from sugar cane. The results show that pith can adsorb basic dyes and breakthrough curves are reported at various heights in the fixed beds. The bed depth service time model has been used to assess the results.

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