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In this paper, mechanical impeller mixing has been analyzed through CFD which has proven to be a useful method for simulating mixing before manufacturing the digester. In this work, simulations were done for five different digester designs for TS level of 12.1%. While the fifth digester was cylindrical, the other four were cubical in design with varying impeller diameters and the number of impellers. The power law model was used to resemble the sewage sludge as a non-Newtonian fluid. The modified versions of dead volume and uniformity index were used along with velocity gradient and mixing energy level to quantify the quality of mixing. An analysis of the temperature distributions during mixing and heating was done using a thermal study. The operating speed of 250 rpm was finalized after testing at continuously increasing speeds from 50 to 600 rpm for a flat blade type impeller. As per the thermal model, a 250-W heater raised the temperature by around 15 °C in just 10 min. It was found that cylindrical vessels worked better than cubical digesters and larger impellers also helped in improving the mixing. The cylindrical digester which achieved about 67% homogeneity at a mixing energy level of around 0.95 W/m3, was the optimum design among the investigated digesters. © 2023 The Authors

In this paper, mechanical impeller mixing has been analyzed through CFD which has proven to be a useful method for simulating mixing before manufacturing the digester. In this work, simulations were done for five different digester designs for TS level of 12.1%. While the fifth digester was cylindrical, the other four were cubical in design with varying impeller diameters and the number of impellers. The power law model was used to resemble the sewage sludge as a non-Newtonian fluid. The modified versions of dead volume and uniformity index were used along with velocity gradient and mixing energy level to quantify the quality of mixing. An analysis of the temperature distributions during mixing and heating was done using a thermal study. The operating speed of 250 rpm was finalized after testing at continuously increasing speeds from 50 to 600 rpm for a flat blade type impeller. As per the thermal model, a 250-W heater raised the temperature by around 15 °C in just 10 min. It was found that cylindrical vessels worked better than cubical digesters and larger impellers also helped in improving the mixing. The cylindrical digester which achieved about 67% homogeneity at a mixing energy level of around 0.95 W/m3, was the optimum design among the investigated digesters. © 2023 The Authors

In this paper, mechanical impeller mixing has been analyzed through CFD which has proven to be a useful method for simulating mixing before manufacturing the digester. In this work, simulations were done for five different digester designs for TS level of 12.1%. While the fifth digester was cylindrical, the other four were cubical in design with varying impeller diameters and the number of impellers. The power law model was used to resemble the sewage sludge as a non-Newtonian fluid. The modified versions of dead volume and uniformity index were used along with velocity gradient and mixing energy level to quantify the quality of mixing. An analysis of the temperature distributions during mixing and heating was done using a thermal study. The operating speed of 250 rpm was finalized after testing at continuously increasing speeds from 50 to 600 rpm for a flat blade type impeller. As per the thermal model, a 250-W heater raised the temperature by around 15 °C in just 10 min. It was found that cylindrical vessels worked better than cubical digesters and larger impellers also helped in improving the mixing. The cylindrical digester which achieved about 67% homogeneity at a mixing energy level of around 0.95 W/m3, was the optimum design among the investigated digesters. © 2023 The Authors

The application of treated sewage sludge on farmland is a suggested method for recycling nutrients and reducing demand for commercial fertilizer. However, sludge needs to be safe from possible contaminants which can cause acute and long-term health and environmental problems. Residual pharmaceuticals and organic contaminants are mentioned as emerging threats since wastewater treatment plants are not designed to degrade these substances. The aim of this study was to screen and evaluate the presence, and reduction, of pharmaceuticals and polycyclic aromatic hydrocarbons (PAHs) during anaerobic digestion of mixed primary and waste-activated sludge at 35, 55 and 60°C and during pasteurization at 70°C. The study showed the difficulty of analysing pharmaceutical compounds in low concentrations in the sludge matrix. No general reduction of these compounds was seen during treatment, but for individual substances some reduction occured. The PAHs were generally not reduced during digestion or pasteurization, but for three substances (indeno[1,2,3-cd]pyrene and dibenzo[a,h]anthracene (analysed together) and benzo[g,h,i]perylene) reduction (up to 60%) during digestion was seen. Digestion at 35 and 55°C resulted in about the same order of reduction of the three individual PAHs, which was higher than for digestion at 60°C.

Polysialic acid (polySia) is a carbohydrate polymer of varying chain length. It is a promising scaffold material for tissue engineering. In this work, high chain length polySia was produced by an Escherichia coli K1 strain in a 10-L bioreactor in batch and fed-batch mode, respectively. A new downstream process for polySia is presented, based on membrane adsorber technology and use of inorganic anion exchanger. These methods enable the replacement of precipitation steps, such as acetone, cetavlon, and ethanol precipitation of the already established purification process. The purification process was simplified, while process efficiency and product qualities were improved. The overall yield of polySia from a 10-L batch cultivation process was 61% and for 10-L fed-batch cultivation process the yield was 40% with an overall purity of 98%. The endotoxin content was determined to be negligible (14 EU mg-1). The main advantage of this new downstream process is that polySia with high chain length of more than 130 degree of polymerization can be obtained. In fed-batch cultivation, chain lengths up to 160 degree of polymerization were obtained.

Polysialic acid (polySia) is a carbohydrate polymer of varying chain length. It is a promising scaffold material for tissue engineering. In this work, high chain length polySia was produced by an Escherichia coli K1 strain in a 10-L bioreactor in batch and fed-batch mode, respectively. A new downstream process for polySia is presented, based on membrane adsorber technology and use of inorganic anion exchanger. These methods enable the replacement of precipitation steps, such as acetone, cetavlon, and ethanol precipitation of the already established purification process. The purification process was simplified, while process efficiency and product qualities were improved. The overall yield of polySia from a 10-L batch cultivation process was 61% and for 10-L fed-batch cultivation process the yield was 40% with an overall purity of 98%. The endotoxin content was determined to be negligible (14 EU mg-1). The main advantage of this new downstream process is that polySia with high chain length of more than 130 degree of polymerization can be obtained. In fed-batch cultivation, chain lengths up to 160 degree of polymerization were obtained.

The biodegradation of toluene was studied in two lab-scale air biofilters operated in parallel, packed respectively with perlite granules (PEG) and polyurethane foam cubes (PUC) and inoculated with the same toluene-degrading fungus. Differences on the material pore size, from micrometres in PEG to millimetres in PUC, were responsible for distinct biomass growth patterns. A compact biofilm was formed around PEG, being the interstitial spaces progressively filled with biomass. Microbial growth concentrated at the core of PUC and the excess of biomass was washed-off, remaining the gas pressure drop comparatively low. Air dispersion in the bed was characterised by tracer studies and modelled as a series of completely stirred tanks (CSTR). The obtained number of CSTR (n) in the PEG packing increased from 33 to 86 along with the applied gas flow (equivalent to empty bed retention times from 48 to 12 s) and with operation time (up to 6 months). In the PUC bed, n varied between 9 and 13, indicating that a stronger and steadier gas dispersion was achieved. Michaelis-Menten half saturation constant (km) estimates ranged 71-113 mg m-3, depending on the experimental conditions, but such differences were not significant at a 95% confidence interval. The maximum volumetric elimination rate (rm) varied from 23 to 50 g m -3 h-1. Comparison between volumetric and biomass specific biodegradation activities indicated that toluene mass transfer was slower with PEG than with PUC as a consequence of a smaller biofilm surface and to the presence of larger zones of stagnant air. © 2008 Springer-Verlag. Chemicals / CAS: polyurethan foam, 9009-54-5; toluene, 108-88-3; Air Pollutants; Aluminum Oxide, 1344-28-1; Gases; Perlite, 12427-27-9; polyurethane foam, 9009-54-5; Polyurethanes; Silicon Dioxide, 7631-86-9; Toluene, 108-88-3

We employed high resolution gamma ray tomography to measure radial and axial phase distributions in a laboratory type chemical reactor with a gas inducing turbine stirrer. Therefore, we used a recently developed gamma ray CT system which is operated with a Cs-137 source and a detector that achieves approximately 2 mm spatial resolution. The measured data has been compared to computational fluid dynamics predictions obtained with CFX 10.0.

This paper considers flow around arbitrarily shaped objects. The boundary conditions on the solid boundaries have been applied by replacing the boundary with a surface force distribution on the surface, such that the required boundary conditions are satisfied. The velocity on the boundary is determined by interpolation or by local (Gaussian space) average. The source terms are determined iteratively as part of the solution. They are then averaged and are smoothed out to nearby computational grid points. The method has been applied both to test problems as well as to more complex engineering problems, where there are not many real competitive alternatives to the proposed method. Simulations of creeping flow around a sphere were studied in order to evaluate the performance of different, competitive approaches of imposing boundary conditions. Using local averaging first-order accuracy is obtained; this can be improved by using a Lagrangian polynomial instead, although the convergence is then considerably slower. Simulations of flows around spheres in the Reynolds number range 1-1000 have been carried out. Finally, the approach was used to describe the impellers in a turbine agitated mixer. For these cases, the results show overall good agreement with other computational and experimental results., QC 20100525

Tato bakalářská práce se zabývá posouzením vývoje viskozity suspenze pšeničných otrub během alkalické hydrolýzy. Pšeničné otruby jsou hojně produkovaný nízkonákladový vedlejší produkt mlynářství. Díky svému složení jsou otruby vhodným substrátem pro biorafinaci a zapojení do cirkulární ekonomiky. Během zpracování však dochází k vývoji viskozity, která značné ovlivňuje energetické nároky pro zpracování. Pomocí rotačního reometru byl při konstantní smykové rychlosti stanoven časový vývoj viskozity během alkalické hydrolýzy otrub. Viskozita během hydrolýzy byla posuzována jako funkce koncentrace NaOH, teploty a navážky otrub. Dále byl vývoj viskozity proměřen během alkalické extrakce proteinů. Nejvyšší viskozita byla naměřena v systému 0,2 M NaOH při 30 °C s poměrem otrub a hydroxidu 1:10. Její hodnota byla 0,991 ± 0,010 Pa.s. Na základě teoretické části a získaných dat z reologického měření byl proveden návrh míchaného reaktoru na zpracování pšeničných otrub v průmyslovém měřítku. Jedná se o svislou válcovou nádobu s celkovým objemem 10 m3. Nádoba je opatřena třemi hydrofoil oběžnými koly Chemineer HE-3 upevněnými na svislé hřídeli. Příkon míchadla byl vypočten na 2,8 kW a ve srovnání s běžně používanou turbínou se čtyřmi skloněnými lopatkami pod úhlem 45 ° byla zvolená konstrukce čtyřikrát účinnější., This bachelor thesis deals with the assessment of the viscosity evolution of wheat bran suspension during alkaline hydrolysis. Wheat bran is a widely produced low-cost by-product of the milling industry. Due to its composition, bran is a suitable substrate for biorefining and involvement in the circular economy. However, during processing, viscosity development occurs, which greatly affects the energy requirements for processing. The temporal evolution of viscosity during alkaline hydrolysis was determined using a rotational rheometer at constant shear rate. Viscosity was assessed as a function of NaOH concentration, temperature and bran ration. Furthermore, the evolution of viscosity was measured during alkaline extraction of proteins. The highest viscosity was measured in a 0.2 M NaOH system at 30 °C with a bran to hydroxide ratio of 1:10. Its value was 0.991 ± 0.010 Pa.s. Based on the theoretical part and the data obtained from rheological measurements, the design of a stirred reactor for wheat bran processing on an industrial scale was carried out. It is a vertical cylindrical vessel with a total volume of 10 m3. The vessel is equipped with three Chemineer HE-3 hydrofoil impellers mounted on a vertical shaft. The power input of the agitator was calculated at 2.8 kW and compared to a conventional 4-blade, 45-degree pitched blade turbine, the chosen design was four times more efficient.

Tato bakalářská práce se zabývá posouzením vývoje viskozity suspenze pšeničných otrub během alkalické hydrolýzy. Pšeničné otruby jsou hojně produkovaný nízkonákladový vedlejší produkt mlynářství. Díky svému složení jsou otruby vhodným substrátem pro biorafinaci a zapojení do cirkulární ekonomiky. Během zpracování však dochází k vývoji viskozity, která značné ovlivňuje energetické nároky pro zpracování. Pomocí rotačního reometru byl při konstantní smykové rychlosti stanoven časový vývoj viskozity během alkalické hydrolýzy otrub. Viskozita během hydrolýzy byla posuzována jako funkce koncentrace NaOH, teploty a navážky otrub. Dále byl vývoj viskozity proměřen během alkalické extrakce proteinů. Nejvyšší viskozita byla naměřena v systému 0,2 M NaOH při 30 °C s poměrem otrub a hydroxidu 1:10. Její hodnota byla 0,991 ± 0,010 Pa.s. Na základě teoretické části a získaných dat z reologického měření byl proveden návrh míchaného reaktoru na zpracování pšeničných otrub v průmyslovém měřítku. Jedná se o svislou válcovou nádobu s celkovým objemem 10 m3. Nádoba je opatřena třemi hydrofoil oběžnými koly Chemineer HE-3 upevněnými na svislé hřídeli. Příkon míchadla byl vypočten na 2,8 kW a ve srovnání s běžně používanou turbínou se čtyřmi skloněnými lopatkami pod úhlem 45 ° byla zvolená konstrukce čtyřikrát účinnější., This bachelor thesis deals with the assessment of the viscosity evolution of wheat bran suspension during alkaline hydrolysis. Wheat bran is a widely produced low-cost by-product of the milling industry. Due to its composition, bran is a suitable substrate for biorefining and involvement in the circular economy. However, during processing, viscosity development occurs, which greatly affects the energy requirements for processing. The temporal evolution of viscosity during alkaline hydrolysis was determined using a rotational rheometer at constant shear rate. Viscosity was assessed as a function of NaOH concentration, temperature and bran ration. Furthermore, the evolution of viscosity was measured during alkaline extraction of proteins. The highest viscosity was measured in a 0.2 M NaOH system at 30 °C with a bran to hydroxide ratio of 1:10. Its value was 0.991 ± 0.010 Pa.s. Based on the theoretical part and the data obtained from rheological measurements, the design of a stirred reactor for wheat bran processing on an industrial scale was carried out. It is a vertical cylindrical vessel with a total volume of 10 m3. The vessel is equipped with three Chemineer HE-3 hydrofoil impellers mounted on a vertical shaft. The power input of the agitator was calculated at 2.8 kW and compared to a conventional 4-blade, 45-degree pitched blade turbine, the chosen design was four times more efficient.

Tato bakalářská práce se zabývá posouzením vývoje viskozity suspenze pšeničných otrub během alkalické hydrolýzy. Pšeničné otruby jsou hojně produkovaný nízkonákladový vedlejší produkt mlynářství. Díky svému složení jsou otruby vhodným substrátem pro biorafinaci a zapojení do cirkulární ekonomiky. Během zpracování však dochází k vývoji viskozity, která značné ovlivňuje energetické nároky pro zpracování. Pomocí rotačního reometru byl při konstantní smykové rychlosti stanoven časový vývoj viskozity během alkalické hydrolýzy otrub. Viskozita během hydrolýzy byla posuzována jako funkce koncentrace NaOH, teploty a navážky otrub. Dále byl vývoj viskozity proměřen během alkalické extrakce proteinů. Nejvyšší viskozita byla naměřena v systému 0,2 M NaOH při 30 °C s poměrem otrub a hydroxidu 1:10. Její hodnota byla 0,991 ± 0,010 Pa.s. Na základě teoretické části a získaných dat z reologického měření byl proveden návrh míchaného reaktoru na zpracování pšeničných otrub v průmyslovém měřítku. Jedná se o svislou válcovou nádobu s celkovým objemem 10 m3. Nádoba je opatřena třemi hydrofoil oběžnými koly Chemineer HE-3 upevněnými na svislé hřídeli. Příkon míchadla byl vypočten na 2,8 kW a ve srovnání s běžně používanou turbínou se čtyřmi skloněnými lopatkami pod úhlem 45 ° byla zvolená konstrukce čtyřikrát účinnější., This bachelor thesis deals with the assessment of the viscosity evolution of wheat bran suspension during alkaline hydrolysis. Wheat bran is a widely produced low-cost by-product of the milling industry. Due to its composition, bran is a suitable substrate for biorefining and involvement in the circular economy. However, during processing, viscosity development occurs, which greatly affects the energy requirements for processing. The temporal evolution of viscosity during alkaline hydrolysis was determined using a rotational rheometer at constant shear rate. Viscosity was assessed as a function of NaOH concentration, temperature and bran ration. Furthermore, the evolution of viscosity was measured during alkaline extraction of proteins. The highest viscosity was measured in a 0.2 M NaOH system at 30 °C with a bran to hydroxide ratio of 1:10. Its value was 0.991 ± 0.010 Pa.s. Based on the theoretical part and the data obtained from rheological measurements, the design of a stirred reactor for wheat bran processing on an industrial scale was carried out. It is a vertical cylindrical vessel with a total volume of 10 m3. The vessel is equipped with three Chemineer HE-3 hydrofoil impellers mounted on a vertical shaft. The power input of the agitator was calculated at 2.8 kW and compared to a conventional 4-blade, 45-degree pitched blade turbine, the chosen design was four times more efficient.

Tato bakalářská práce se zabývá posouzením vývoje viskozity suspenze pšeničných otrub během alkalické hydrolýzy. Pšeničné otruby jsou hojně produkovaný nízkonákladový vedlejší produkt mlynářství. Díky svému složení jsou otruby vhodným substrátem pro biorafinaci a zapojení do cirkulární ekonomiky. Během zpracování však dochází k vývoji viskozity, která značné ovlivňuje energetické nároky pro zpracování. Pomocí rotačního reometru byl při konstantní smykové rychlosti stanoven časový vývoj viskozity během alkalické hydrolýzy otrub. Viskozita během hydrolýzy byla posuzována jako funkce koncentrace NaOH, teploty a navážky otrub. Dále byl vývoj viskozity proměřen během alkalické extrakce proteinů. Nejvyšší viskozita byla naměřena v systému 0,2 M NaOH při 30 °C s poměrem otrub a hydroxidu 1:10. Její hodnota byla 0,991 ± 0,010 Pa.s. Na základě teoretické části a získaných dat z reologického měření byl proveden návrh míchaného reaktoru na zpracování pšeničných otrub v průmyslovém měřítku. Jedná se o svislou válcovou nádobu s celkovým objemem 10 m3. Nádoba je opatřena třemi hydrofoil oběžnými koly Chemineer HE-3 upevněnými na svislé hřídeli. Příkon míchadla byl vypočten na 2,8 kW a ve srovnání s běžně používanou turbínou se čtyřmi skloněnými lopatkami pod úhlem 45 ° byla zvolená konstrukce čtyřikrát účinnější., This bachelor thesis deals with the assessment of the viscosity evolution of wheat bran suspension during alkaline hydrolysis. Wheat bran is a widely produced low-cost by-product of the milling industry. Due to its composition, bran is a suitable substrate for biorefining and involvement in the circular economy. However, during processing, viscosity development occurs, which greatly affects the energy requirements for processing. The temporal evolution of viscosity during alkaline hydrolysis was determined using a rotational rheometer at constant shear rate. Viscosity was assessed as a function of NaOH concentration, temperature and bran ration. Furthermore, the evolution of viscosity was measured during alkaline extraction of proteins. The highest viscosity was measured in a 0.2 M NaOH system at 30 °C with a bran to hydroxide ratio of 1:10. Its value was 0.991 ± 0.010 Pa.s. Based on the theoretical part and the data obtained from rheological measurements, the design of a stirred reactor for wheat bran processing on an industrial scale was carried out. It is a vertical cylindrical vessel with a total volume of 10 m3. The vessel is equipped with three Chemineer HE-3 hydrofoil impellers mounted on a vertical shaft. The power input of the agitator was calculated at 2.8 kW and compared to a conventional 4-blade, 45-degree pitched blade turbine, the chosen design was four times more efficient.

Tato bakalářská práce se zabývá posouzením vývoje viskozity suspenze pšeničných otrub během alkalické hydrolýzy. Pšeničné otruby jsou hojně produkovaný nízkonákladový vedlejší produkt mlynářství. Díky svému složení jsou otruby vhodným substrátem pro biorafinaci a zapojení do cirkulární ekonomiky. Během zpracování však dochází k vývoji viskozity, která značné ovlivňuje energetické nároky pro zpracování. Pomocí rotačního reometru byl při konstantní smykové rychlosti stanoven časový vývoj viskozity během alkalické hydrolýzy otrub. Viskozita během hydrolýzy byla posuzována jako funkce koncentrace NaOH, teploty a navážky otrub. Dále byl vývoj viskozity proměřen během alkalické extrakce proteinů. Nejvyšší viskozita byla naměřena v systému 0,2 M NaOH při 30 °C s poměrem otrub a hydroxidu 1:10. Její hodnota byla 0,991 ± 0,010 Pa.s. Na základě teoretické části a získaných dat z reologického měření byl proveden návrh míchaného reaktoru na zpracování pšeničných otrub v průmyslovém měřítku. Jedná se o svislou válcovou nádobu s celkovým objemem 10 m3. Nádoba je opatřena třemi hydrofoil oběžnými koly Chemineer HE-3 upevněnými na svislé hřídeli. Příkon míchadla byl vypočten na 2,8 kW a ve srovnání s běžně používanou turbínou se čtyřmi skloněnými lopatkami pod úhlem 45 ° byla zvolená konstrukce čtyřikrát účinnější., This bachelor thesis deals with the assessment of the viscosity evolution of wheat bran suspension during alkaline hydrolysis. Wheat bran is a widely produced low-cost by-product of the milling industry. Due to its composition, bran is a suitable substrate for biorefining and involvement in the circular economy. However, during processing, viscosity development occurs, which greatly affects the energy requirements for processing. The temporal evolution of viscosity during alkaline hydrolysis was determined using a rotational rheometer at constant shear rate. Viscosity was assessed as a function of NaOH concentration, temperature and bran ration. Furthermore, the evolution of viscosity was measured during alkaline extraction of proteins. The highest viscosity was measured in a 0.2 M NaOH system at 30 °C with a bran to hydroxide ratio of 1:10. Its value was 0.991 ± 0.010 Pa.s. Based on the theoretical part and the data obtained from rheological measurements, the design of a stirred reactor for wheat bran processing on an industrial scale was carried out. It is a vertical cylindrical vessel with a total volume of 10 m3. The vessel is equipped with three Chemineer HE-3 hydrofoil impellers mounted on a vertical shaft. The power input of the agitator was calculated at 2.8 kW and compared to a conventional 4-blade, 45-degree pitched blade turbine, the chosen design was four times more efficient.

Tato bakalářská práce se zabývá posouzením vývoje viskozity suspenze pšeničných otrub během alkalické hydrolýzy. Pšeničné otruby jsou hojně produkovaný nízkonákladový vedlejší produkt mlynářství. Díky svému složení jsou otruby vhodným substrátem pro biorafinaci a zapojení do cirkulární ekonomiky. Během zpracování však dochází k vývoji viskozity, která značné ovlivňuje energetické nároky pro zpracování. Pomocí rotačního reometru byl při konstantní smykové rychlosti stanoven časový vývoj viskozity během alkalické hydrolýzy otrub. Viskozita během hydrolýzy byla posuzována jako funkce koncentrace NaOH, teploty a navážky otrub. Dále byl vývoj viskozity proměřen během alkalické extrakce proteinů. Nejvyšší viskozita byla naměřena v systému 0,2 M NaOH při 30 °C s poměrem otrub a hydroxidu 1:10. Její hodnota byla 0,991 ± 0,010 Pa.s. Na základě teoretické části a získaných dat z reologického měření byl proveden návrh míchaného reaktoru na zpracování pšeničných otrub v průmyslovém měřítku. Jedná se o svislou válcovou nádobu s celkovým objemem 10 m3. Nádoba je opatřena třemi hydrofoil oběžnými koly Chemineer HE-3 upevněnými na svislé hřídeli. Příkon míchadla byl vypočten na 2,8 kW a ve srovnání s běžně používanou turbínou se čtyřmi skloněnými lopatkami pod úhlem 45 ° byla zvolená konstrukce čtyřikrát účinnější., This bachelor thesis deals with the assessment of the viscosity evolution of wheat bran suspension during alkaline hydrolysis. Wheat bran is a widely produced low-cost by-product of the milling industry. Due to its composition, bran is a suitable substrate for biorefining and involvement in the circular economy. However, during processing, viscosity development occurs, which greatly affects the energy requirements for processing. The temporal evolution of viscosity during alkaline hydrolysis was determined using a rotational rheometer at constant shear rate. Viscosity was assessed as a function of NaOH concentration, temperature and bran ration. Furthermore, the evolution of viscosity was measured during alkaline extraction of proteins. The highest viscosity was measured in a 0.2 M NaOH system at 30 °C with a bran to hydroxide ratio of 1:10. Its value was 0.991 ± 0.010 Pa.s. Based on the theoretical part and the data obtained from rheological measurements, the design of a stirred reactor for wheat bran processing on an industrial scale was carried out. It is a vertical cylindrical vessel with a total volume of 10 m3. The vessel is equipped with three Chemineer HE-3 hydrofoil impellers mounted on a vertical shaft. The power input of the agitator was calculated at 2.8 kW and compared to a conventional 4-blade, 45-degree pitched blade turbine, the chosen design was four times more efficient.