Despite the efforts to reduce its water consumption,the food industry still requires large amounts of water. Membrane processes have established themselves in the food industry at the beginning of the water loop for p...Despite the efforts to reduce its water consumption,the food industry still requires large amounts of water. Membrane processes have established themselves in the food industry at the beginning of the water loop for preparation of the intake water and at the end water loop for recovery and final treatment of the water. The focus of this paper is on two application studies related to water recovery and water treatment in the food industry. The first study is on water recovery from tank washing water in customized liquid sugar production. During the washing of the tanks,sweet water with 1°- 5° Brix sugars is produced which is equivalent to a COD of 5000 - 25000 mg/L. By reverse osmosis,this sweet water can be separated into a sugar-free permeate for recycling and a concentrate with more than 20° Brix,which can be utilized as animal feed. The second study is on the effluent from production of modified potato starch,which is contaminated with spirochete bacteria resulting in problems in the wastewater treatment plant. By installing a membrane bioreactor,not only is this problem overcome but the general quality of the water at the discharge of the plant is improved. Overall,this paper demonstrates that membrane processes have a large potential in the water recovery and wastewater treatment in the food industry.展开更多
A 44revolution''in the craft brewing industry has led to high demand for dryhopped beers and increasing production in breweries both small and large.However,there are many challenges associated with the automa...A 44revolution''in the craft brewing industry has led to high demand for dryhopped beers and increasing production in breweries both small and large.However,there are many challenges associated with the automation and scale-up of dry-hopping techniques to larger beer volumes.These include efficient introduction of the hops without excessive oxygen pick-up,effective extraction of the aroma compounds into large beer volumes,removal of the hops while minimizing product loss,and efficient cleaning in place of the system.Most existing dry-hopping systems in the market exhibit capacity limitations,are difficult to clean by automated clean-in-place processes,and are challenging to integrate into automated modern breweries.The potential of rotary jet mixers for dry-hopping applications has been considered,but the high particulate loads in the fluid require a special mixer design.Alfa Laval has developed the Iso-Mix external drive system,a new type of rotary jet mixer suitable for dry hopping of larger beer volumes.The system homogenizes hop distribution in the beer,potentially reducing the required quantity of hops while attaining the desired flavors.Homogenization continues during transfer to downstream centrifligation,improving the separation efficiency and product clarity.It is easily automated and allows flexibility in the method of hops introduction.The process configuration is similar to conventional rotary jet mixing systems,and as such,the system can also be used to optimize the fermentation,maturation,and crash-cooling processes.This article examines the challenges of large-scale dry hopping and demonstrates how the new system improves the dryhopping process for larger tanks.展开更多
文摘Despite the efforts to reduce its water consumption,the food industry still requires large amounts of water. Membrane processes have established themselves in the food industry at the beginning of the water loop for preparation of the intake water and at the end water loop for recovery and final treatment of the water. The focus of this paper is on two application studies related to water recovery and water treatment in the food industry. The first study is on water recovery from tank washing water in customized liquid sugar production. During the washing of the tanks,sweet water with 1°- 5° Brix sugars is produced which is equivalent to a COD of 5000 - 25000 mg/L. By reverse osmosis,this sweet water can be separated into a sugar-free permeate for recycling and a concentrate with more than 20° Brix,which can be utilized as animal feed. The second study is on the effluent from production of modified potato starch,which is contaminated with spirochete bacteria resulting in problems in the wastewater treatment plant. By installing a membrane bioreactor,not only is this problem overcome but the general quality of the water at the discharge of the plant is improved. Overall,this paper demonstrates that membrane processes have a large potential in the water recovery and wastewater treatment in the food industry.
文摘A 44revolution''in the craft brewing industry has led to high demand for dryhopped beers and increasing production in breweries both small and large.However,there are many challenges associated with the automation and scale-up of dry-hopping techniques to larger beer volumes.These include efficient introduction of the hops without excessive oxygen pick-up,effective extraction of the aroma compounds into large beer volumes,removal of the hops while minimizing product loss,and efficient cleaning in place of the system.Most existing dry-hopping systems in the market exhibit capacity limitations,are difficult to clean by automated clean-in-place processes,and are challenging to integrate into automated modern breweries.The potential of rotary jet mixers for dry-hopping applications has been considered,but the high particulate loads in the fluid require a special mixer design.Alfa Laval has developed the Iso-Mix external drive system,a new type of rotary jet mixer suitable for dry hopping of larger beer volumes.The system homogenizes hop distribution in the beer,potentially reducing the required quantity of hops while attaining the desired flavors.Homogenization continues during transfer to downstream centrifligation,improving the separation efficiency and product clarity.It is easily automated and allows flexibility in the method of hops introduction.The process configuration is similar to conventional rotary jet mixing systems,and as such,the system can also be used to optimize the fermentation,maturation,and crash-cooling processes.This article examines the challenges of large-scale dry hopping and demonstrates how the new system improves the dryhopping process for larger tanks.
