A large number of challenges for the extraction and separation of industrial commercialized docosahexaenoic acid(DHA),oils,proteins,and polysaccharides from microalgae are the costly downstream processes such as dryin...
详细信息
A large number of challenges for the extraction and separation of industrial commercialized docosahexaenoic acid(DHA),oils,proteins,and polysaccharides from microalgae are the costly downstream processes such as drying and dewatering,cell wall disruption,laborious conventional extraction procedures and exploitation of large volumes of *** address these concerns the microwave-assisted three-liquid-phase salting-out(MA-TLPSOE) extraction method was used to separate and isolate DHA,oils,proteins,and polysaccharides directly from wet fermentation broths of Schizochytrium limacinum *** microwave-assisted three-liquid-phase system was composed of 30%(w/w)n-hexane/13%(w/w) ethanol/9%(w/w) sodium carbonate and treated at high microwave power(650w) for 30 *** effects of different microwave power,microwave duration,sodium carbonate,n-hexane,ethanol concentration and extraction time were *** results showed that 100%DHA and 99.98%oil were partitioned in the top n-hexane phase while 93.75% of polysaccharides and 92.96% of protein were distributed in solid-phase interface between the middle and bottom *** the optimized system was enlarged from 20 g to 60 g,the yields of all effective components were almost the ***,the microwave-assisted three-liquid-phase system is a promising and attractive technology which could be used for the separation and extraction of various effective ingredients from complex natural products in a single step at a low cost and significant recovery yield.
Due to its outstanding energy and cost saving potential,dividing wall column(DWC) for the separation of multi-component mixtures has been known and gained importance for last two *** conventional distillation column,D...
详细信息
Due to its outstanding energy and cost saving potential,dividing wall column(DWC) for the separation of multi-component mixtures has been known and gained importance for last two *** conventional distillation column,DWC has more design variables,such as liquid and vapor split *** definition,liquid and vapor split ratios are the ratios of each stream flowing into the prefractionation section to that flowing to the main fractionation *** and vapor split ratios need to be actively tuned during the operation to obtain optimal and full energy saving of ***,there is no active vapor split device was implemented in any existing DWCs according to the articles have been published by numerous ***,when the feed condition is changed,DWC requires higher reboiler duty to maintain the purity in the product ***,it is irrelevant to the original purpose of using DWC instead of two conventional column ***,Benit M has successfully developed an enhanced active vapor distributor(EAVD?) to overcome the existing problems of DWC associated with the vapor split *** the EAVD?,the window opening area of the vapor flow path is hydraulically adjusted by changing the liquid level of a modified chimney *** adjustment of liquid level can be done by operating the conventional control valve in each section of *** EAVD? was tested with Air-Water simulated DWC in Benit M's laboratory under different operating conditions to demonstrate its *** results showed EAVD? was able to actively adjust the desired vapor split ratio during the operation along with the liquid split ratio ***,despite its great potential to notably reduce costs,only hundred DWCs are being operated in the ***? considerably aims to close this *** any risk,the modification of existing DWCs also could be done easily by substituting the conventional chimney tray with EAVD? to improve its operability and
暂无评论