Abstract: The invention relates to a process and system for the production of a solvent using monophasic solventogenic Clostridia in a single stage process. More particularly, the process and system relate to the use of a culture vessel for culturing monophasic solventogenic Clostridia, wherein cell growth of the Clostridium is monitored and optimized by the addition of controlled amounts of culture media and/or the removal of controlled amounts of solvent. The process and system may particularly be used to produce solvents such as butanol, acetone and ethanol.

Abstract: The present invention relates to a two stage continuous microbiological process for the production of solvents such as acetone, butanol and ethanol. Preferably, the process involves the use of a solventogenic bacteria such as clostridia. In the first (acidogenic) stage, the culture vessel is fed with fresh growth media at dilution rates that support fast growth and acid production. The culture flows into the second (solventogenic) stage, which is a separate culture vessel or vessels, designed to provide the culture with sufficient residence time to convert acids into solvents. Preferably this vessel is tubular or a series of linked batch vessels.

Abstract: The present invention relates to a two stage continuous microbiological process for the production of solvents such as acetone, butanol and ethanol. The process involves the use of a solventogenic bacteria such as clostridia. In the first(acidogenic) stage, the culture vessel is fed with fresh growth media at dilution rates that support fast growth and acid production. The culture flows into the second (solventogenic) stage, which is a separate culture vessel or vessels, designed to provide the culture with sufficient residence time to convert acids into solvents. This vessel can be tubular or a series of linked batch vessels.

Abstract: The invention relates to a process and system for the production of a solvent using monophasic solventogenic Clostridia in a single stage process. More particularly, the process and system relate to the use of a culture vessel for culturing mono phasic solventogenic Clostridia, wherein cell growth of the Clostridium is monitored and optimised by the addition of controlled Q amounts of culture media and/or the removal of controlled amounts of solvent. The process and system may particularly be used to produce solvents such as butanol, acetone and ethanol.