Integration of pervaporation and continuous butanol fermentation with immobilized cells I: Experimental results

Long-Term Continuous Cultivation of Clostridium beijerinckii in a Two-Stage Chemostat with On-Line Solvent Removal

“…It was shown by using synthetic alcohol-water mixtures that the flux of alcohols through the membrane increases as the concentration of alcohols in water increases (15). The polypro- showed similar behavior ( Fig.…”

“…It was shown by using synthetic alcohol-water mixtures that the flux of alcohols through the membrane increases as the concentration of alcohols in water increases (15). The polypro- pylene membrane used during the part of experiment with on-line product removal (after 2,166 to 2,263 h of operation) showed similar behavior (Fig.…”

“…Hence, the use of vacuum instead of sweep gas on the permeate side of the membrane allows a smaller membrane area with the same effect. The use of pervaporation, as opposed to membrane evaporation (12,15), results in higher solvent concentrations in the permeate and higher membrane selectivities, but the membrane fluxes would be lower (Table 4). Higher membrane fluxes with corresponding smaller membrane areas are an important factor when considering commercial production.…”

Long-Term Continuous Cultivation of Clostridium beijerinckii in a Two-Stage Chemostat with On-Line Solvent Removal

“…It was shown by using synthetic alcohol-water mixtures that the flux of alcohols through the membrane increases as the concentration of alcohols in water increases (15). The polypro- showed similar behavior ( Fig.…”

“…It was shown by using synthetic alcohol-water mixtures that the flux of alcohols through the membrane increases as the concentration of alcohols in water increases (15). The polypro- pylene membrane used during the part of experiment with on-line product removal (after 2,166 to 2,263 h of operation) showed similar behavior (Fig.…”

“…Hence, the use of vacuum instead of sweep gas on the permeate side of the membrane allows a smaller membrane area with the same effect. The use of pervaporation, as opposed to membrane evaporation (12,15), results in higher solvent concentrations in the permeate and higher membrane selectivities, but the membrane fluxes would be lower (Table 4). Higher membrane fluxes with corresponding smaller membrane areas are an important factor when considering commercial production.…”

Biobutanol from Renewable Agricultural and Lignocellulose Resources and Its Perspectives as Alternative of Liquid Fuels

“…Experiments with a pilot plant plate-and-frame pervaporation module were described for the separation and dehydration of alcohols. This module was also coupled to continuous BuOH fermentation, however, sterilization of the module was troublesome, and it was frequently plugged by microbial cells [205]. ABE solvents were produced in an integrated fermentation-product recovery system using C. acetobutylicum and a silicalite-silicone composite membrane.…”

Production of longer-chain alcohols from lignocellulosic biomass: butanol, isopropanol and 2,3-butanediol

“…Integration of pervaporation with continuous fermentation resulted in higher productivities compared to batch processes; Silicone/silicalite and polypropylene membranes have been used (Groot et al, 1991, Friedl et al, 1991, Huang and Meagher, 2001. However, some practical problems, such as fouling of the pumps were encountered.…”

Long-Term Continuous Cultivation of Clostridium beijerinckii in a Two-Stage Chemostat with On-Line Solvent Removal

“…It was shown by using synthetic alcohol-water mixtures that the flux of alcohols through the membrane increases as the concentration of alcohols in water increases (15). The polypro- showed similar behavior ( Fig.…”

“…It was shown by using synthetic alcohol-water mixtures that the flux of alcohols through the membrane increases as the concentration of alcohols in water increases (15). The polypro- pylene membrane used during the part of experiment with on-line product removal (after 2,166 to 2,263 h of operation) showed similar behavior (Fig.…”

“…Hence, the use of vacuum instead of sweep gas on the permeate side of the membrane allows a smaller membrane area with the same effect. The use of pervaporation, as opposed to membrane evaporation (12,15), results in higher solvent concentrations in the permeate and higher membrane selectivities, but the membrane fluxes would be lower (Table 4). Higher membrane fluxes with corresponding smaller membrane areas are an important factor when considering commercial production.…”

Biobutanol from Renewable Agricultural and Lignocellulose Resources and Its Perspectives as Alternative of Liquid Fuels

“…Experiments with a pilot plant plate-and-frame pervaporation module were described for the separation and dehydration of alcohols. This module was also coupled to continuous BuOH fermentation, however, sterilization of the module was troublesome, and it was frequently plugged by microbial cells [205]. ABE solvents were produced in an integrated fermentation-product recovery system using C. acetobutylicum and a silicalite-silicone composite membrane.…”

Production of longer-chain alcohols from lignocellulosic biomass: butanol, isopropanol and 2,3-butanediol

“…Integration of pervaporation with continuous fermentation resulted in higher productivities compared to batch processes; Silicone/silicalite and polypropylene membranes have been used (Groot et al, 1991, Friedl et al, 1991, Huang and Meagher, 2001. However, some practical problems, such as fouling of the pumps were encountered.…”

Long-Term Continuous Cultivation of Clostridium beijerinckii in a Two-Stage Chemostat with On-Line Solvent Removal

“…It was shown by using synthetic alcohol-water mixtures that the flux of alcohols through the membrane increases as the concentration of alcohols in water increases (15). The polypro- showed similar behavior ( Fig.…”

“…It was shown by using synthetic alcohol-water mixtures that the flux of alcohols through the membrane increases as the concentration of alcohols in water increases (15). The polypro- pylene membrane used during the part of experiment with on-line product removal (after 2,166 to 2,263 h of operation) showed similar behavior (Fig.…”

“…Hence, the use of vacuum instead of sweep gas on the permeate side of the membrane allows a smaller membrane area with the same effect. The use of pervaporation, as opposed to membrane evaporation (12,15), results in higher solvent concentrations in the permeate and higher membrane selectivities, but the membrane fluxes would be lower (Table 4). Higher membrane fluxes with corresponding smaller membrane areas are an important factor when considering commercial production.…”

Biobutanol from Renewable Agricultural and Lignocellulose Resources and Its Perspectives as Alternative of Liquid Fuels

“…Experiments with a pilot plant plate-and-frame pervaporation module were described for the separation and dehydration of alcohols. This module was also coupled to continuous BuOH fermentation, however, sterilization of the module was troublesome, and it was frequently plugged by microbial cells [205]. ABE solvents were produced in an integrated fermentation-product recovery system using C. acetobutylicum and a silicalite-silicone composite membrane.…”

Production of longer-chain alcohols from lignocellulosic biomass: butanol, isopropanol and 2,3-butanediol

“…Integration of pervaporation with continuous fermentation resulted in higher productivities compared to batch processes; Silicone/silicalite and polypropylene membranes have been used (Groot et al, 1991, Friedl et al, 1991, Huang and Meagher, 2001. However, some practical problems, such as fouling of the pumps were encountered.…”