Model for oxygen transfer in rotating biological contactor

Kubsad, Vijay; Chaudhari, Sanjeev; Gupta, Satish Kumar

doi:10.1016/j.watres.2004.08.016

Cited by 40 publications

(27 citation statements)

References 7 publications

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“…Attempt was also made to predict K L a for the three reactors used in this study using models available in the literature. Kim and Molof model significantly overestimated the experimental K L a values obtained in the reactors utilized by Bintanja et al (1975), Zeevalkink et al (1979), Paolini (1986), Boumansour and Vasel (1998), Kubsad et al (2004) and for the reactors utilized in this study. Kim and Molof model could fit the experimental K L a observed for their reactor while none of the other models could provide a good fit to the experimental values reported for the reactor used by Kim and Molof (1982).…”

Section: Basis For Model Developmentcontrasting

confidence: 54%

“…This may be due to the reactor design being significantly different compared to the other reactors. The modified Kim and Molof model proposed by Kubsad et al (2004) significantly improved the goodness of fit to experimental K L a values obtained in various reactors, however, large deviations were observed for the reactor used by Kim and Molof (1982), Bintanja et al (1975) at low rpm (<20) and for the reactors R2 and R3 employed in this study. The model proposed by Bintanja et al (1975) provided good fit for the reactor utilized by Paolini (1986) (at all rpm up to 25) and also for Zeevalkink et al (1979) (at rpm 6 20).…”

Section: Basis For Model Developmentmentioning

confidence: 68%

“…The models proposed by Kubsad et al (2004) and Bintanja et al (1975) provided good estimates for K L a in the largest reactor R1 while the Bintanja and Sant' Anna model provided good estimates for K L a in the reactor R2. Thus, Table 2 illustrates that, although models for predicting the oxygen transfer coefficient K L a based on reactor design and operating parameters are available, they often fail to predict the experimentally observed values satisfactorily.…”

Section: Basis For Model Developmentmentioning

confidence: 96%

“…The model was found to underestimate the experimental K L a for the reactor utilized by Boumansour and Vasel (1998) at various rotational speeds. The model proposed by Sant' Anna (1980) underestimated the values of K L a for the reactors utilized by various researchers, i.e., Zeevalkink et al (1979), Paolini (1986), Boumansour and Vasel (1998) and Kubsad et al (2004). On the other hand, the model was found to overestimate the values of K L a for the reactors used by Bintanja et al (1975).…”

Section: Basis For Model Developmentmentioning

confidence: 97%

“…This number was later redefined by Kubsad et al (2004) by incorporating a dependence of N v on number of disc (n), working volume (V, m 3 ) and total disc surface area exposed to air. In addition to the indirect oxygen transfer due to mixing of the oxygenated film on the disc with the reactor contents, some researchers have emphasized the importance of direct oxygen transfer from air to the water in the reactor due to turbulence created by disc rotation (Sant' Anna, 1980).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Dimensional analysis for modeling oxygen transfer in rotating biological contactor

Chavan

Mukherji

2008

Bioresource Technology

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Section: Basis For Model Developmentcontrasting

confidence: 54%

Section: Basis For Model Developmentmentioning

confidence: 68%

Section: Basis For Model Developmentmentioning

confidence: 96%

Section: Basis For Model Developmentmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dimensional analysis for modeling oxygen transfer in rotating biological contactor

Chavan

Mukherji

2008

Bioresource Technology

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Bioreactors: Rotating Biological Contactors

Cortez

Teixeira

Oliveira

et al. 2013

Encyclopedia of Industrial Biotechnology

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Rotating biological contactors (RBCs) have been used as an efficient fixed film method of treating wastewater due to its advantages such as low energy and land requirements or simplicity of operation. In this article, we firstly describe the operation, benefits and drawbacks, hydrodynamics and typical applications of these bioreactors, and then review the main factors affecting their performance. Some aspects about RBC design and scale‐up, the main operational problems and their resolution are presented. The comparison of the performance of RBCs with other wastewater treatment systems as well as costs considerations and prospects are also discussed.

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Biofilm growth of Chlorella sorokiniana in a rotating biological contactor based photobioreactor

Blanken

Janssen

Cuaresma

et al. 2014

Biotech & Bioengineering

133

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Microalgae biofilms could be used as a production platform for microalgae biomass. In this study, a photobioreactor design based on a rotating biological contactor (RBC) was used as a production platform for microalgae biomass cultivated in biofilm. In the photobioreactor, referred to as Algadisk, microalgae grow in biofilm on vertical rotating disks partially submerged in a growth medium. The objective is to evaluate the potential of the Algadisk photobioreactor with respect to the effects of disk roughness, disk rotation speed and CO2 concentration. These objectives where evaluated in relationship to productivity, photosynthetic efficiency, and long-term cultivation stability in a lab-scale Algadisk system. Although the lab-scale Algadisk system is used, operation parameters evaluated are relevant for scale-up. Chlorella Sorokiniana was used as model microalgae. In the lab-scale Algadisk reactor, productivity of 20.1 ± 0.7 g per m(2) disk surface per day and a biomass yield on light of 0.9 ± 0.04 g dry weight biomass per mol photons were obtained. Different disk rotation speeds did demonstrate minimal effects on biofilm growth and on the diffusion of substrate into the biofilm. CO2 limitation, however, drastically reduced productivity to 2-4 g per m(2) disk surface per day. Productivity could be maintained over a period of 21 weeks without re-inoculation of the Algadisk. Productivity decreased under extreme conditions such as pH 9-10, temperature above 40°C, and with low CO2 concentrations. Maximal productivity, however, was promptly recovered when optimal cultivation conditions were reinstated. These results exhibit an apparent opportunity to employ the Algadisk photobioreactor at large scale for microalgae biomass production if diffusion does not limit the CO2 supply.

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Model for oxygen transfer in rotating biological contactor

Cited by 40 publications

References 7 publications

Dimensional analysis for modeling oxygen transfer in rotating biological contactor

Dimensional analysis for modeling oxygen transfer in rotating biological contactor

Bioreactors: Rotating Biological Contactors

Biofilm growth of Chlorella sorokiniana in a rotating biological contactor based photobioreactor

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