What causes loud Dissolved Gas Flotation noise

• Abnormal Operation of Core Power Equipment

  Core power equipment in a dissolved air flotation system, such as the booster pump and air compressor, is a major source of noise. If the booster pump's impeller is worn, the bearings are aging, or the connection to the motor is misaligned, friction and increased vibration can cause piercing noise during operation. If the air compressor's intake valve seal is not tight or the cylinder is worn, airflow turbulence during compression can occur, causing high-frequency noise. As the equipment ages and components wear out, the noise problem becomes more pronounced.

• Loose Equipment Connections and Mounting Components

  If piping connections and brackets between various components in the system are exposed to long-term vibration, bolts, flanges, and other fasteners can become loose. When water or air flows through loose pipes, the pipes shake and collide with surrounding components, generating impact noise. If brackets lose their stability, the supported equipment can shift, increasing vibration amplitude during operation and transmitting noise to the surrounding environment, causing significant noise pollution.

• Airflow Disturbance During Gas-Liquid Mixing and Release

  During the air dissolution process in the dissolved air tank and the release of microbubbles from the releaser, if the internal flow guide structure of the dissolved air tank is damaged, the air and water cannot mix evenly, resulting in localized airflow accumulation and turbulent noise within the tank. If the aperture of the releaser is clogged, worn, or improperly installed, the airflow will be uneven during the microbubble release. The impact of high-speed airflow and water will generate strong hydraulic noise, which will vary with the adjustment of dissolved air pressure.

• Poor Compatibility of Equipment Selection with Installation Environment

  If the actual processing capacity and site environment are not fully considered when selecting dissolved air flotation equipment, the selected equipment may be overpowered and operate beyond the required load, which can easily generate excessive vibration and noise. If vibration damping measures are not properly implemented during installation, such as installing shock-absorbing pads on the bottom of the equipment and using flexible pipe connections, the vibration generated by the equipment operation will be directly transmitted to the ground and building structure, causing resonant noise. Furthermore, if the equipment is installed in a confined space, the noise cannot be effectively dissipated, resulting in a localized noise accumulation and exacerbating the noise impact.