Microalgae have great, yet relatively untapped potential as a highly productive crop for the production of animal and aquaculture feed, biofuels, and nutraceutical products. Compared to conventional terrestrial crops ...Microalgae have great, yet relatively untapped potential as a highly productive crop for the production of animal and aquaculture feed, biofuels, and nutraceutical products. Compared to conventional terrestrial crops they have a very fast growth rate and can be produced on non-arable land. During microalgae cultivation, carbon dioxide(CO_2) is supplied as the carbon source for photosynthesising microalgae. There are a number of potential CO_2 supplies including air, flue gas and purified CO_2. In addition, several strategies have been applied to the delivery of CO_2 to microalgae production systems, including directly bubbling CO_2-rich gas, microbubbles, porous membrane spargers and non-porous membrane contactors. This article provides a comparative analysis of the different CO_2 supply and delivery strategies and how they relate to each other.展开更多
Particle deposition during crossflow filtration is significantly influenced by the operating conditions,in particular the permeate flux and crossflow velocity.However,there is a lack of detailed knowledge about how de...Particle deposition during crossflow filtration is significantly influenced by the operating conditions,in particular the permeate flux and crossflow velocity.However,there is a lack of detailed knowledge about how deposit layer structures and distributions depend on operating parameters.This study uses a microfluidic visualisation filtration system to examine the influence of operating conditions on the deposition process during crossflow ultrafiltration from a microscopic perspective.Increasing the permeate flux caused an increasing amount of deposition and a thicker deposit layer.Higher crossflow velocities reduced the extent of deposition.The degree of deposition varied over a range of operating conditions due to the altered hydrodynamic forces exerted on the particles,which can be examined by the deposition probability according to an existing model.Building on this,an empirical correlation between the deposition probability and volume of deposition as a function of filtration time was developed,which gave good agreement with experimental results.The effect of solution conditions was also involved in this correlation as a interaction energies.This could be useful for predicting the dynamic deposition process during crossflow filtration over a range of operating and solution conditions.展开更多
基金the Pratten Foundation for their valuable financial contribution to this work
文摘Microalgae have great, yet relatively untapped potential as a highly productive crop for the production of animal and aquaculture feed, biofuels, and nutraceutical products. Compared to conventional terrestrial crops they have a very fast growth rate and can be produced on non-arable land. During microalgae cultivation, carbon dioxide(CO_2) is supplied as the carbon source for photosynthesising microalgae. There are a number of potential CO_2 supplies including air, flue gas and purified CO_2. In addition, several strategies have been applied to the delivery of CO_2 to microalgae production systems, including directly bubbling CO_2-rich gas, microbubbles, porous membrane spargers and non-porous membrane contactors. This article provides a comparative analysis of the different CO_2 supply and delivery strategies and how they relate to each other.
文摘Particle deposition during crossflow filtration is significantly influenced by the operating conditions,in particular the permeate flux and crossflow velocity.However,there is a lack of detailed knowledge about how deposit layer structures and distributions depend on operating parameters.This study uses a microfluidic visualisation filtration system to examine the influence of operating conditions on the deposition process during crossflow ultrafiltration from a microscopic perspective.Increasing the permeate flux caused an increasing amount of deposition and a thicker deposit layer.Higher crossflow velocities reduced the extent of deposition.The degree of deposition varied over a range of operating conditions due to the altered hydrodynamic forces exerted on the particles,which can be examined by the deposition probability according to an existing model.Building on this,an empirical correlation between the deposition probability and volume of deposition as a function of filtration time was developed,which gave good agreement with experimental results.The effect of solution conditions was also involved in this correlation as a interaction energies.This could be useful for predicting the dynamic deposition process during crossflow filtration over a range of operating and solution conditions.
