. Because Energy-Saving. Is unknown KP students, there is no knowledge of biological fermentation food leftovers from water formulas that can help put out odors, we describe how to make and the benefits of Water biological fermentation from food leftovers. That is useful both to kill bacteria speeds up digestion of waste put out odors and can make up food leftovers. Biological fermentation which substitute liquid deodorant with a high price. It is cost-effective.