Cassava starch waste from factories. It was found that the residue after fermentation art with the bacteria Clostridium clan and the product is butanol Which can produce as fuel. According to the present people pay attention on the bio energy more and more. Butanol that has the ability to absorb moisture. Evaporation is low and also the density of energy similar to gasoline This project has a concept to study using cassava residue was fermented with infections. Cl. Acetobutylicum by studying the concentration of bacteria.
Cl. Acetobutylicum found that bacteria Cl. Acetobutylicum is concentrated. 〖10〗^5has the ability to produce organic solvents as much as possible. However, the yield (Yield) of bacteria Cl. Acetobutylicum used different concentrations, which found that the Yield will increase from 0.19% 0.34% when the concentration of bacteria. Cl. Acetobutylicum from 〖10 〗^4 is 〖10〗^5and decreased from 0.34% 0.31% when the concentration of bacteria, acetobutylicum Cl. From 〖10〗^5is 〖10〗^6and decreased from 0.31% 0.26 when the concentration of bacteria Cl. Acetobutylicum from 〖10〗^6, 〖10〗^7From the data using the concentration of bacteria Cl. Acetobutylicum in the production of organic solvents at high concentration. That may affect the amount of butanol at. When we increase the concentration of bacteria Cl. Acetobutylicum too high will result in the productivity has fallen. That bacteria Cl. Acetobutylicum. Can use raw materials from cassava which is in the country and cheap. In the butanol production effectively. The effects of sample preparation prior to fermentation with acid hydrogen chloride click dilution. Found that make the production organic solvents decreased, which believes that the probable cause inhibition of bacteria (Growth inibitor substance). Happened while preparing it. Besides all of the above information. Show raw cassava can be used to produce organic solvent effectively.