What Are the Applications of Heat Exchangers in Sewage Treatment?

2025-10-31 | More News

Sewage treatment is a crucial environmental protection task in modern society, which is related to our quality of life and health.

In the sewage treatment process, the heat exchanger is an extremely important piece of equipment. It can help us treat sewage more effectively, improving the efficiency and quality of sewage treatment.

The applications of heat exchangers in sewage treatment mainly include the following aspects:

Preheating Treatment

In the sewage treatment process, it is necessary to preheat sewage to improve the efficiency and quality of treatment. Heat exchangers can transfer heat from sewage to preheating media, thereby realizing the preheating treatment of sewage. For example, in sewage treatment plants in some cold regions, the low temperature of sewage in winter will affect the effect of biological treatment.

By using heat exchangers, heat can be exchanged between sewage and hot water from other processes to increase the temperature of sewage, thereby enhancing microbial activity and improving treatment efficiency. According to practical cases, preheating treatment can increase the rate of biological reactions by 10% to 20%, significantly shortening the treatment time.

Heat Recovery

A large amount of heat is generated during sewage treatment. If this heat cannot be effectively recovered and utilized, it will result in energy waste. Heat exchangers can transfer heat from sewage to other media, realizing the recovery and reuse of heat.

For example, in some large-scale sewage treatment plants, a large amount of biogas is produced when sludge is treated by the anaerobic digestion process. By using heat exchangers, the heat in biogas can be recovered for heating sewage or other process media, achieving energy self-sufficiency. Statistics show that heat recovery can reduce the energy consumption of sewage treatment plants by 20% to 30%.

Cooling Treatment

In the sewage treatment process, it is necessary to cool sewage to prevent the excessive growth and reproduction of microorganisms in it.

Heat exchangers can transfer heat from sewage to cooling media, thereby realizing the cooling treatment of sewage. For example, in some high-temperature seasons or regions, the high temperature of sewage will affect the treatment effect. By using heat exchangers, heat can be exchanged between sewage and cold water to lower the temperature of sewage, thereby inhibiting the growth and reproduction of microorganisms. According to practical cases, cooling treatment can reduce microbial activity by 30% to 50%, effectively controlling the treatment process.

Sterilization and Disinfection

In the sewage treatment process, it is necessary to sterilize sewage to kill bacteria and viruses in it.

Heat exchangers can transfer heat from sewage to sterilization media, thereby realizing the sterilization and disinfection of sewage. For example, some sewage treatment plants adopt the ultraviolet disinfection process, which requires heating sewage to a certain temperature to enhance the bactericidal effect of ultraviolet rays.

By using heat exchangers, the heat in sewage can be recovered for heating disinfection media, improving the efficiency of sterilization and disinfection. According to practical applications, sterilization and disinfection treatment can achieve a removal rate of more than 99% for bacteria and viruses in sewage.

Heat exchangers have important application value in sewage treatment. Through the rational use of heat exchangers, the efficiency and quality of sewage treatment can be improved, treatment costs can be reduced, and the goals of energy recovery and environmental protection can be achieved. In practical applications, it is necessary to select appropriate types of heat exchangers and process parameters according to specific conditions to ensure their optimal performance and effect.

GNEE was founded in 2008 and is located at No.4-1114, Beichen Building, Beicang Town, Beichen District, Tianjin, China. It is an entity enterprise engaging in high-end industrial equipment manufacturing, focusing on the R&D, manufacturing and related technical services of industrial heat exchange equipment and pressure vessels.

Since its establishment, the company has adhered to the philosophy of “achieving customers, making employees happy; embracing changes, valuing actions; there is no best, only better”. With the goal of providing one-stop services to make choices easier, it has been deeply engaged in industrial heat exchange equipment for many years and has become an excellent and irreplaceable presence in the industry.

If you want to learn more about GNEE’s products, you can send an email to [email protected]. We are more than happy to assist you.