Abstract
Surfactants are used in various industrial fields. Synthetic surfactants, which are widely used, are chemically synthesized from petroleum. However, they cause water quality problems are highly toxic, not biodegradable, and lead to environmental pollution. Conversely, bio-surfactants are easily biodegradable, low in toxicity, and excellent in removing fat. Biosurfactants can be used in place of chemically synthesized surfactants, which are ecologically unfriendly. Many types of biosurfactants can be obtained from microorganisms. In this study, an eco detergent was developed using surfactin, which is one of the surfactants obtained from the bacterium Bacillus amyloliquefaciens KB3. The characteristics of the surfactin were confirmed prior to analysis. The results showed that emulsification activity in soybean oil was 2.815, and the emulsification stability was -1.7 (Kd, 10<sup>-3</sup>). The critical micelle concentration range was 35 - 40 mg/L, and the surface tension was approximately about 36 mN/m. The biodegradability of the surfactin was 83.8 %, confirming that it can be used effectively as a surfactant for an eco detergent. The performance of the surfactin developed ecodetergent was physically compared with the commercial synthetic detergent products, and it was confirmed that the ecodetergent is superior.
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