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HST™ turbocompressorThe modern and silent HST™ turbocompressor features an advanced design with proven magnetic bearing technology and a high-speed motor driven through a built-in frequency converter.
Air for efficient aerobic biological treatment
Turbocompressors for clever wastewater treatment in a pulp and paper mill
Norske Skog Boyer Mill in Tasmania is a TMP newsprint mill that has produced paper continuously since 1949. A wastewater treatment plant comprising a central moving bed bioreactor (MBBR) and outer activated sludge tank (AST) treats up to 25’000 m³/d of process effluent. Four sets of HST™ turbocompressors play an essential role in the supply of air for efficient aerobic biological treatment. The compressors feed nine subermersible OKI aerator mixers in the AST and the aeration grid in the MBBR.
The challenge
To meet the requirements of highest reliability and efficiency:
- Highest reliable performance – minimal downtime and maintenance
- Simple operation – compressors are automatically controlled to achieve dissolved oxygen level
- Efficient operation – the compressors run with high efficiency and VFD drive
- Deep tank – compressors can meet the high pressure requirement
The solution
Sulzer tailored a package of HST turbocompressors to meet the customer’s requirements:
- Automatically controlled air flow to achieve the actual level of dissolved oxygen
- Very low power consumption with high efficiency and VFD drive
- Practically maintenance-free with magnetic bearing technology and no wearing parts
- Compact and simple design made installation easy and needed less space
Sulzer’s HST turbocompressors play an essential role in the efficient supply of air in the biological treatment aeration reactors.
Patrik Kolmodin
Business Development Manager General Industry
Customer benefit
Due to their innovative design, the HST turbocompressors are an excellent choice for industrial wastewater treatment:
- Compact design reduced the construction cost
- Perfectly achieved dissolved oxygen level by automatic control system with stable performance
- Absolutely easy operation and minimum work load for operators
- Maintenance-free, several years of trouble-free operation
- Power consumption is always at optimal level, reducing the operation cost considerably
- Quiet operation and no need for extra measurements to eliminate noise
Product specification
4 HST 6000-2-H-4 turbocompressors
| Capacity | 6’000 m³/h |
| Pressure | 100-120 kPa |
| Motor | 240 kW |