Fermentation - News, Trends, Fermentation Links
Distillation is a challenge to all fermentation processes
A challenge common to all ethanol fermentation processes - ethanol produced in fermentation process is highly diluted with water. In fact, the ethanol produced from fermenting grain typically makes up only 15-20% of the solution, with the remainder water. For cellulosic ethanol, the crude ethanol is typically less than 5%. Separating water and ethanol an energy-intensive process. Even where the EROEI is high, as in sugarcane ethanol, distillation takes substantial amount of energy. - Read More
Tags : distillation ethanol cellulosic ethanol biofuels biofuel problems
Topics : Bioenergy
Anaeobic bacteria that can use synthetis gas and ferment it
There are a number of anaerobic bacteria in addition to C. ljungdahlii that can utilize the components of synthesis gas (CO, CO2, and H2) as carbon and energy sources (for fermentation?) : Clostridium thermoaceticum, Clostridium autoethanogenum, Peptostreptoccus productus, Eubacteriam limosum, Butyribacterium mehylotrophicum, and Clostridium acetobutylicum. - Read More
Tags : syngas gasification gasification fermentation bacteria cellulosic ethanol
The Co-Production of Ethanol and Electricity From Carbon-based Wastes
A detailed white paper from BRI Energy on a gasification-fermentation process for ethanol - Read More
Tags : gasification ethanol cellulosic ethanol
Topics : Waste to Energy
Cow belches, not farts, emit methane
Cows produce methane as a result of enteric fermentation by symbiotic bacteria living in their digestive systems. But most enteric fermentation occurs in cow stomachs, not intestines, so most methane emitted by a cow - up to 98% according to one scientist - is through belching, not farting. - Read More
Topics : Pollutions