Carbon source is a carbon containing compound that can provide nutrients for the microbial growth and metabolism of wastewater biochemical treatment systems. Carbon sources are divided into single carbon sources and composite carbon sources. A single carbon source is a carbon source that contains only one effective carbon source component. A composite carbon source is a carbon source composed of two or more effective carbon source components, which must be compatible with each other, have no chemical reactions, and have no safety risks. The effective components of carbon sources are organic compounds with a single molecular formula and structure that are easily utilized by microorganisms, including small molecule alcohols such as methanol, ethanol, propanol, butanol, ethylene glycol, glycerol, butanol, pentanol, etc., as well as small molecule organic acids and salts such as formic acid, acetic acid, propionic acid, lactic acid, butyric acid, acetate, citric acid, citrate, glucose, fructose, sucrose, etc. The effective carbon source composition must meet the requirements of corresponding national or industry standards.
