Anaerobic tanks are an important part of the sewage treatment process. Their function is to decompose organic matter into inorganic matter through the action of microorganisms, thereby achieving the purpose of purifying water quality. Simply put, the function of anaerobic tanks is to decompose organic matter in sewage.
The function of anaerobic tanks is mainly to treat organic matter in wastewater by anaerobic bacteria without dissolved oxygen. This process includes hydrolysis, acidification and methanation of organic matter, aiming to remove organic matter in wastewater and improve the biodegradability of sewage, which is conducive to subsequent aerobic treatment. In the anaerobic biological treatment process, organic matter is first converted from complex insoluble polymers to simple soluble monomers or dimers, a process called hydrolysis. Subsequently, these small molecular organic matter is further decomposed by anaerobic microorganisms, and finally produces methane and carbon dioxide. Anaerobic tanks are particularly suitable for treating high-concentration organic wastewater because they have the characteristics of wide application range, high load and low sludge production.
How do anaerobic tanks achieve this function? There is a kind of microorganism called anaerobic bacteria in anaerobic tanks, which can decompose organic matter in the absence of oxygen. These microorganisms can use organic matter as their energy source and break it down into simpler substances. This process produces some harmful gases, such as methane and hydrogen sulfide, but these gases will be further broken down by other microorganisms in the anaerobic tank, thereby achieving the purpose of purifying water quality.
In addition, the anaerobic tank has the following functions:
1. Remove nitrogen and phosphorus from sewage. In the anaerobic tank, anaerobic bacteria can convert nitrogen and phosphorus in sewage into forms that are more easily used by other microorganisms. This can reduce the pollution of nitrogen and phosphorus to the environment.
2. Reduce chemical oxygen demand (COD). Microorganisms in anaerobic tanks can decompose organic matter, thereby reducing the chemical oxygen demand in sewage. This helps to improve the efficiency of sewage treatment.
3. Reduce the amount of sludge produced. In the anaerobic tank, microorganisms can break down organic matter into simpler substances, thereby reducing the amount of sludge produced. This helps to reduce the cost of sludge treatment.
