Wastewater treatment plants (WWTPs) commonly rely on positive displacement (PD) blowers to supply air for aeration basins and biological treatment processes. While essential to plant operation, these blowers are often one of the primary sources of high noise levels within a facility. WWTP PD blower sound enclosures are specifically engineered to reduce this noise at the source while maintaining proper airflow, cooling, and maintenance access required for continuous operation.

PD blowers generate noise from multiple components, including the blower housing, intake and discharge air pulsations, motor noise, and structure-borne vibration. In a wastewater plant, these noise sources can create sound levels exceeding 100 dBA inside blower rooms, impacting worker safety and contributing to environmental noise concerns. A properly designed sound enclosure targets all noise paths using a combination of sound-blocking steel panels and sound-absorbing internal linings.  eNoise Control also can supply our acoustic pipe sound blanket wraps.  The sound blankets can help lower the discharge piping noise.

Our WWTP blower sound enclosures are typically constructed from modular, heavy-gauge steel acoustic panels designed for long-term durability in harsh plant environments. These panels are filled with high-performance acoustic material and assembled to minimize sound leakage through joints and seams. The modular design allows enclosures to be installed around existing equipment with minimal disruption to plant operations, making them ideal for retrofit applications as well as new construction.

Ventilation is a critical factor in the blower enclosure design. PD blowers generate significant heat, and restricting airflow can reduce equipment life or cause overheating. For this reason, enclosures are engineered with silenced ventilation systems that maintain proper airflow while controlling noise. Options include acoustic louvers, lined ventilation plenums, and forced-air fan systems depending on the heat load and enclosure size. Intake and discharge silencers can also be incorporated to further reduce airborne noise from the blower system.  We can assess if intake (or discharge) silencers are needed for the application.

Maintenance access is another key consideration in wastewater facilities where uptime is critical. Enclosures can be designed with full-size acoustic doors, removable wall panels, or lift-off roof sections to allow easy access for inspection, lubrication, and repairs. This ensures that noise control does not interfere with routine maintenance or emergency service requirements. Designs can also accommodate piping penetrations, electrical connections, and structural supports specific to each blower installation.

Typical applications include aeration blower rooms, digester gas systems, and other process air systems found in municipal and industrial wastewater treatment plants. Each enclosure is custom engineered based on blower size, motor horsepower, airflow requirements, and target noise reduction goals. The result is a practical, long-term solution that balances acoustic performance with operational reliability.

If your wastewater treatment facility is experiencing high noise levels from PD blowers, a custom-designed sound enclosure can provide an effective and durable solution. Properly engineered systems can significantly reduce noise while maintaining the performance and accessibility your operation depends on.

Please contact eNoise Control today to discuss your WWTP PD Blower noise project.

Contact our team about your WWTP noise issues at 888.213.4711 or send us an email to info@enoisecontrol.com.