Principles of Municipal Sewage Treatment Engineering

Urban domestic sewage is a product of urban development. With the acceleration of urbanization and industrialization processes, its production volume continuously increases, and its impact on the ecological environment also intensifies. The management of urban sewage plays a key role in improving the urban water environment and ensuring urban economic development. Municipal sewage treatment engineering is a process that uses physical, chemical, and biological methods to purify and recycle urban domestic sewage and industrial wastewater. Its goal is to protect water resources, prevent water pollution, improve the water environment, and enhance water quality.

Municipal Sewage Treatment Process

The common urban sewage treatment processes are divided into three levels:

Primary treatment involves physical methods to treat suspended solids, floating materials, and large particulate solid pollutants in the sewage.

Secondary treatment refers to biological treatment. Dispersed organic matter and dissolved organic matter in wastewater are converted into microbial cell substances and more stable chemical substances through microbial metabolism. Common technologies include activated sludge method and biofilm method.

Tertiary treatment includes removal of nutrients and disinfection of sewage using techniques such as chlorination, ultraviolet radiation, or ozone, which can quickly and effectively remove a wider range of pollutants.

Municipal Sewage Treatment: Disinfection Tank in Tertiary Treatment

Tertiary treatment refers to the processes that use physical, chemical, or biological methods to remove or inactivate microorganisms and pathogens in sewage. These microorganisms and pathogens mainly include bacteria, viruses, parasites, algae, etc. The equipment used in tertiary treatment includes disinfection tanks, filtration tanks, and reverse osmosis systems.

A disinfection tank is a piece of equipment used to kill or inhibit microorganisms and pathogens in sewage. It usually consists of a container that holds disinfectants, with certain water flow speed and retention time inside. Disinfection tanks can use chlorine, ozone, and disinfectants to improve the hygienic safety of sewage.

Potassium Monopersulfate Disinfectant in Disinfection Tanks

Potassium monopersulfate disinfectant plays a crucial role in the tertiary treatment stage, particularly in the disinfection tank, of municipal sewage treatment. As a new type of active oxygen disinfectant, it has strong non-chlorine oxidative capabilities that can efficiently kill almost all pathogens, including bacteria, viruses, and fungi, without causing microbial resistance. Additionally, potassium monopersulfate disinfectant is residue-free, safe, and environmentally friendly; it can degrade harmful by-products left by other disinfectants, thus further ensuring water safety. During disinfection, potassium monopersulfate disinfectant can also oxidize and remove organic matter and harmful substances from the water, enhancing water clarity. Its good stability and easy operation make the use of potassium monopersulfate disinfectant in municipal sewage treatment systems both efficient and convenient. Therefore, potassium monopersulfate disinfectant is widely used in tertiary treatment disinfection tanks and has become an important link in ensuring water quality safety.