Kinetic models of cell growth, L-lactic acid formation and glucose consumption in L-lactic acid batch fermentation are proposed and kinetic model parameters are determined.

Then discuss the acid formation from the soil quality, atmosphere grain, NH 3 and weather forms, point out these natural factor's difference is the most important cause of acid rain formation.

Unfortunately, these black smokers are very acid, which prevents amino-acid stabilization, and thus the formation of organic molecules.