The concept of SBCR was put forward to treat sauce wastewater. Further study showed that adding appropriate amount of calcium chloride to SBR can improve the quality of effluent. The removal rate of COD and color was ...The concept of SBCR was put forward to treat sauce wastewater. Further study showed that adding appropriate amount of calcium chloride to SBR can improve the quality of effluent. The removal rate of COD and color was 84% and 80%, 36%, 96% higher than those of traditional SBR respectively. The results of continuous experiments and biophase observing showed that calcium chloride accumulation increased the sludge production slightly while the sludge dewatering characteristic was improved.展开更多
Slurry bubble column reactors(SBCR)is a three-phase fluidized reactor with outstanding advantages compared with other reactors and is difficult to scale-up due to lack of information on hydrodynamics and mass transfer...Slurry bubble column reactors(SBCR)is a three-phase fluidized reactor with outstanding advantages compared with other reactors and is difficult to scale-up due to lack of information on hydrodynamics and mass transfer over a wide range of operating conditions of commercial interest.In this paper,an experiment was conducted to investigate the bubble behavior in SBCR with a height of 5600 mm and an interior diameter of 480 mm.Bubble rise velocity,bubble diameter,and gas holdup in different radial and axial positions are measured in SBCR using four-channel conductivity probe.Tap water,air,and glass beads(mean diameter 75-150μm)are used as liquid,gas,and solid phases,respectively.It shows that hydrodynamic parameters have good regularity in SBCR.Moreover,a commercial computational fluid dynamics(CFD)package,Fluent,was used to simulate the process in SBCR.The simulations were carried out using axi-symmetric 2-D grids.Data obtained from experiment and CFD simulation are compared,and results show that the tendency of simulation is almost uniform with the experiment,which can help to obtain further understanding about multiphase flow process and establish a model about the synthesis of alcohol ether fuel in SBCR.展开更多
文摘The concept of SBCR was put forward to treat sauce wastewater. Further study showed that adding appropriate amount of calcium chloride to SBR can improve the quality of effluent. The removal rate of COD and color was 84% and 80%, 36%, 96% higher than those of traditional SBR respectively. The results of continuous experiments and biophase observing showed that calcium chloride accumulation increased the sludge production slightly while the sludge dewatering characteristic was improved.
基金the financial support by the National Basic Research Program of China(973 program,Grant No.2005CB221205).
文摘Slurry bubble column reactors(SBCR)is a three-phase fluidized reactor with outstanding advantages compared with other reactors and is difficult to scale-up due to lack of information on hydrodynamics and mass transfer over a wide range of operating conditions of commercial interest.In this paper,an experiment was conducted to investigate the bubble behavior in SBCR with a height of 5600 mm and an interior diameter of 480 mm.Bubble rise velocity,bubble diameter,and gas holdup in different radial and axial positions are measured in SBCR using four-channel conductivity probe.Tap water,air,and glass beads(mean diameter 75-150μm)are used as liquid,gas,and solid phases,respectively.It shows that hydrodynamic parameters have good regularity in SBCR.Moreover,a commercial computational fluid dynamics(CFD)package,Fluent,was used to simulate the process in SBCR.The simulations were carried out using axi-symmetric 2-D grids.Data obtained from experiment and CFD simulation are compared,and results show that the tendency of simulation is almost uniform with the experiment,which can help to obtain further understanding about multiphase flow process and establish a model about the synthesis of alcohol ether fuel in SBCR.
