Search results

1

The investigation of ethanol separation by the membrane distillation process

100%

Tomaszewska M., Białończyk L.

Polish Journal of Chemical Technology

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2011

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vol. 13

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issue 3

66-69

EN

Separation of ethanol from solutions with different concentrations in a BIOTRON bioreactor integrated with the direct contact membrane distillation system has been investigated. The experiments were carried out using immersed, capillary polypropylene membranes. The permeability of the membrane at the feed inlet temperatures of 308, 318 and 333K was determined. The permeate and ethanol flux was strongly affected by the vapour pressure which increased with the feed temperature and it was also associated with ethanol concentration in the feed. It was found that the membrane distillation can be successfully applied for the separation of volatile components such as ethanol.

2

Hydraulic Mixing Modelling in Reactor for Biogas Production

100%

Chmielewski A. G., Berbeć A., Zalewski M., Dobrowolski A.

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vol. 33

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issue 4

621-628

EN

Two-stage biogas production plant consists of two reactors: a hydrolyser and a fermentor. The bioreactor construction has to meet three requirements: low cost and simplicity of construction and good biomass mixing conditions with an application of appropriate method. This paper reports CFD modelling of hydraulic mixing in the tank to be applied in a two-stage industrial installation.

3

Steady state characteristics of a three-phase fluidized bed bioreactor with partial biomass recirculation

88%

Skoneczny S., Tabiś B., Skoneczny S., Tabiś B.

Chemical and Process Engineering

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2019

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vol. 40

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issue 1

4

MATHEMATICAL MODELLING AND STATIONARY CHARACTERISTICS OF A TWO-PHASE FLUIDISED-BED BIOREACTOR WITH EXTERNAL AERATION

88%

Tabiś B., Stryjewski W. S.

Chemical and Process Engineering

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2013

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vol. 34

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issue 4

435-448

EN

A mathematical model for a two-phase fluidised bed bioreactor with liquid recirculation and an external aerator was proposed. A stationary nonlinear analysis of such a bioreactor for an aerobic process with double-substrate kinetics was carried out. The influences of a volumetric fraction of solid carriers in the liquid phase, the rate of active biomass transfer from the biofilm to the liquid, the concentration of carbonaceous substrate, the mean residence time of the liquid and the efficiency of the external aerator on the steady state characteristics of the bioreactor were described. A method for determination of the minimal recirculation ratio related to oxygen demand and fluidised bed conditions was presented. On the basis of the obtained results, it is possible to choose reasonable operating conditions of such plants and to determine constraints, while considering acceptable concentrations of a toxic substrate being degraded.

5

Optimization of culture conditions for flexirubin production by Chryseobacterium artocarpi CECT 8497 using response surface methodology

88%

Venil C., Zakaria Z., Ahmad W.

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issue 2

185-190

EN

Flexirubins are the unique type of bacterial pigments produced by the bacteria from the genus Chryseobacterium, which are used in the treatment of chronic skin disease, eczema etc. and may serve as a chemotaxonomic marker. Chryseobacterium artocarpi CECT 8497, an yellowish-orange pigment producing strain was investigated for maximum production of pigment by optimizing medium composition employing response surface methodology (RSM). Culture conditions affecting pigment production were optimized statistically in shake flask experiments. Lactose, l-tryptophan and KH2PO4 were the most significant variables affecting pigment production. Box Behnken design (BBD) and RSM analysis were adopted to investigate the interactions between variables and determine the optimal values for maximum pigment production. Evaluation of the experimental results signified that the optimum conditions for maximum production of pigment (521.64 mg/L) in 50 L bioreactor were lactose 11.25 g/L, l-tryptophan 6 g/L and KH2PO4 650 ppm. Production under optimized conditions increased to 7.23 fold comparing to its production prior to optimization. Results of this study showed that statistical optimization of medium composition and their interaction effects enable short listing of the significant factors influencing maximum pigment production from Chryseobacterium artocarpi CECT 8497. In addition, this is the first report optimizing the process parameters for flexirubin type pigment production from Chryseobacterium artocarpi CECT 8497.

6

Mathematical modeling of ethanol production by Saccharomyces cerevisiae in batch culture with non-structured model

88%

Konopacka A., Konopacki M., Kordas M., Rakoczy R.

Chemical and Process Engineering

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2019

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vol. 40

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issue 3

7

Hydraulic Mixing Modelling in Reactor for Biogas Production

88%

Berbeć A., Chmielewski A. G., Zalewski M., Dobrowolski A.

Chemical and Process Engineering

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2012

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issue 4

8

Nonlinear Dynamics of a Controlled Stirred Tank Bioreactor With Predator-Prey Relationship

88%

Tabiś B., Skoneczny S., Stryjewski W. S.

Chemical and Process Engineering

|

2014

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vol. 35

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issue 3

349-360

EN

The paper presents the dynamic characteristics of a continuous tank bioreactor for microbiological process, with a developed predator-prey food chain. The presence of the predator microorganism considerably influences the position and stability character of steady-states. There appears to exist a wide range of unstable steady-states and high-amplitude oscillations of state variables. Without automatic control, the system can operate only in unsteady conditions. From technological point of view, this circumstance is unfavorable. It was shown that oscillations can be removed by employing automatic control with continuous P or PI controllers. Moreover, the use of a controller with integrating element causes removal of the predator from the bioreactor. The paper discusses an application of this phenomenon for practical purposes.

9

Numerical analysis of momentum transfer processes in a mechanically agitated air – biophase – liquid system

88%

Musiał M., Cudak M., Karcz J.

Chemical and Process Engineering

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2017

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vol. 38

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issue 3

10

Facilities and problems of processing organic wastes by family-type biogas plants in Ukraine

75%

Voytovych I., Malovanyy M., Zhuk V., Mukha O., Voytovych I., Malovanyy M., Zhuk V., Mukha O.

Journal of Water and Land Development

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2020

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issue 45

11

Nonlinear Dynamics of a Controlled Stirred Tank Bioreactor With Predator-Prey Relationship

75%

Tabiś B., Skoneczny S., Stryjewski W. S.

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issue 3

12

MATHEMATICAL MODELLING AND STATIONARY CHARACTERISTICS OF A TWO-PHASE FLUIDISED-BED BIOREACTOR WITH EXTERNAL AERATION

75%

Tabiś B., Stryjewski W. S.

Chemical and Process Engineering

|

2013

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issue 4

13

A Simple Analytical Method for Determining Basic Hydrodynamic Characteristics of Hybrid Fluidized-Bed Air-Lift Apparatae

75%

Tabiś B., Boroń D.

Chemical and Process Engineering

|

2017

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vol. 38

|

issue 1

Refine search results

The investigation of ethanol separation by the membrane distillation process

Hydraulic Mixing Modelling in Reactor for Biogas Production

Steady state characteristics of a three-phase fluidized bed bioreactor with partial biomass recirculation

MATHEMATICAL MODELLING AND STATIONARY CHARACTERISTICS OF A TWO-PHASE FLUIDISED-BED BIOREACTOR WITH EXTERNAL AERATION

Optimization of culture conditions for flexirubin production by Chryseobacterium artocarpi CECT 8497 using response surface methodology

Mathematical modeling of ethanol production by Saccharomyces cerevisiae in batch culture with non-structured model

Hydraulic Mixing Modelling in Reactor for Biogas Production

Nonlinear Dynamics of a Controlled Stirred Tank Bioreactor With Predator-Prey Relationship

Numerical analysis of momentum transfer processes in a mechanically agitated air – biophase – liquid system

Facilities and problems of processing organic wastes by family-type biogas plants in Ukraine

Nonlinear Dynamics of a Controlled Stirred Tank Bioreactor With Predator-Prey Relationship

MATHEMATICAL MODELLING AND STATIONARY CHARACTERISTICS OF A TWO-PHASE FLUIDISED-BED BIOREACTOR WITH EXTERNAL AERATION

A Simple Analytical Method for Determining Basic Hydrodynamic Characteristics of Hybrid Fluidized-Bed Air-Lift Apparatae