What is the carbon source in sewage treatment? What's the role?

The carbon source in sewage treatment is a compound that can provide organic matter, mainly including organic carbon sources such as methanol, acrylic acid, glucose, ethanol, acetic acid and inorganic carbon sources such as carbon dioxide.

The functions of carbon source in sewage treatment mainly include:

1. Promote the growth and reproduction of microorganisms: carbon source is the nutrient needed for the growth and reproduction of microorganisms, which can provide the carbon required by microorganisms and promote the growth and reproduction of microorganisms.

2. Accelerate the degradation and removal of harmful substances: sewage contains a lot of organic matter. After adding carbon source, microorganisms will absorb and grow by organic matter, thus degrading harmful substances.

3. In the denitrification process, the carbon source is used as a donor to oxidize simple carbon compounds in the process of cell respiration and is reduced to nitrogen, thus realizing the denitrification process of removing nitrate.

When the influent dissolved organic matter is insufficient and the nitrogen removal requirement is high, it is necessary to supplement the carbon source. Composite carbon source and biological carbon source are carbon-containing compounds that provide nutrients for microbial growth and metabolism, which will not affect the species and content of microbial populations in the system, and have no chemical reaction and no safety risk.