Compact high-efficiency turbo compressor

Aeration is a critical component of both municipal and industrial wastewater treatment, enabling the effective removal of organic contaminants and supporting regulatory compliance. Blowers have long been essential, but they are often associated with high energy consumption, noise and ongoing maintenance demands. The introduction of the new Sulzer HST 5 turbocompressor marks a significant advance, particularly for smaller treatment plants processing less than 5,000 cubic metres per day.

The HST 5 is not just for municipal applications. It is also well suited to industries such as pulp and paper, food and beverage, chemicals, pharmaceuticals and mining, where it can enhance both core production processes and integrated wastewater treatment systems. Its flexibility reflects a growing need for compact, efficient and reliable solutions across diverse operational environments.

Proven technology reducing costs

Central to the HST 5’s performance is its advanced design, which prioritises efficiency while reducing mechanical complexity. The compressor combines cutting-edge turbo technology with a permanent magnet motor engineered specifically for this application. Magnetic bearings and air cooling eliminate the need for lubrication systems, significantly lowering maintenance requirements.

These technical features deliver meaningful efficiency gains. In wastewater treatment plants, aeration systems are typically the largest consumers of energy, making them a key focus for cost reduction. The new HST 5 also offers a rugged numeric keypad display as an option in place of the standard touchscreen controls, simplifying operator control.

The HST 5 provides a stable, low-maintenance alternative that operates with minimal vibration and significantly reduced noise. Its compact footprint, low noise and almost vibration free operation optimizes the installation and allows units to be housed in space-efficient structures, helping to reduce infrastructure and operational costs. For example, there is also a containerized version that is suitable for rental solutions and when additional capacity is required to support existing processes.

Improved sustainability and simple integration

By focusing on energy efficient operation, optimized use of materials, and long term reliability, Sulzer enables customers to improve the environmental performance of their processes. The HST 5 has been developed in line with these principles, supporting customers in their transition towards more sustainable operations.

Installation can be carefully planned to minimis e disruption, with new units integrated into existing control systems and brought online alongside legacy equipment. This staged approach allows operators to replace older compressors gradually, maintaining operational continuity while improving efficiency. The compact design also frees up space as older equipment is removed.