And ethanol from biomass is mainly used bacterium Clostridium. In manufacturing, especially Cl. acetobutylicum are the most popular species, including species Cl.Beijerinckii was used in the fermentation process an acetone butanol and ethanol, which is produced as well by the model of the fermentation process. but by bacteria Cl. acetobutylicum, which consists of two stages (Jones and Woods, 1986; Schuster et al., 1998; Badret al., 2001) is in the early stages to produce organic acids, including acid, butyric and acetic acid. During the first 7-18 hours, which is why the lower the pH in the fermentation broth during this call that the production of organic acids after the second phase, which is the production of organic solvents including acetone Big Apple. ethanol and ethanol, which normally takes place after the start of fermentation to 18 hours to 36 or 60 hours in the pH of the fermentation broth is slightly raised and are bringing organic acids produced in. Initially used as part of this second phase is called the phase of production, organic solvents or Solventogenesis Also during the fermentation process also produces hydrogen and carbon dioxide out through the process with Guet al. (2009). reported that the use of cassava flour fortified with Ammonium acetate in the manufacture of organic solvents with bacteria Cl. acetobutylicumEA 2018 found that the use of such raw materials has resulted in the production of organic acids including acetic acid and butyric acid increased significantly in the first period before being used efficiently to produce solvent. Organic production is found butanol and acetone as many applications and the production of ethanol only slightly.
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