With the increasingly strict environmental protection policies, many sewage treatment enterprises are constantly improving their sewage treatment processes. Among the many different sewage treatment processes, biochemical treatment processes are particularly concerned by sewage treatment enterprises. An important aspect of biochemical treatment process is bacterial culture, which is related to the success or failure of the biochemical treatment process. The key to bacterial cultivation lies in the selection of bacterial nutrient solution. Cultivating bacteria requires substances such as water, nitrogen source, inorganic salt, carbon source, growth factor, etc. Among them, sodium acetate products are used as the carbon source. In the past, urea was often used as the carbon source, but there are many residues in the urea industry, and it is easy to cause secondary pollution of water and burn bacteria. In recent years, through continuous exploration, people have found that sodium acetate has better advantages as a carbon source for bacterial cultivation. The industrial product of sodium acetate, called sodium acetate trihydrate, contains water molecules and does not burn bacteria due to high concentration. In addition, the purity of sodium acetate is high and only contains a small amount of industrial residues, so it will not cause secondary pollution of the water body.