Two HUBER Screw Press Q-PRESS® 440.2 for the Regen wastewater treatment plant
The town Regen in the administrative district of Lower Bavaria, is also known as a climatic health resort and boasts numerous sights, buildings and natural monuments. Regular events include the annual Pichelsteiner Festival. Named after a traditional dish, it has grown to become the largest festival in the Bavarian Forest and a major attraction in the region. This makes it all the more important to have a fully functional 24-hour wastewater treatment plant, such as the Regen STP, in place for every event.
Energy-efficient and powerful sludge dewatering
The outdated and energy-intensive chamber filter press was replaced with an energy-efficient and powerful sludge dewatering system. The main focus of the new dewatering system was the energy and disposal costs of the sludge to be dewatered.
After visiting numerous plants on the market, the Regen wastewater treatment plant opted for the screw press principle. The decision was made due to its low specific power consumption and maintenance costs, as well as the very high degree of dewatering achieved in continuous operation. The low speed and specific connected load also appeared to be important factors and were included in the decision-making process as they are sustainable and highly efficient.
Tender
In 2023, two sludge dewatering plants featuring a fully automatic container filling system were put out to tender. The tender also specified the entire pump technology, polymer preparation, switchgear, control system, and all other components required for fully automatic dewatering operation.
Contract awarded to HUBER SE
The decisive advantages – high discharge dry solids content, complete stainless steel construction (rather than a cheap mixed construction), minimal operating costs and trouble-free, unattended 24-hour operation – tipped the scales in favour of HUBER SE being awarded the contract.
The following components were implemented by HUBER following the order placed at the end of 2023:
- 2 HUBER Screw Press Q-PRESS® 440.2
- Pump technology with flocculant preparation and piping
- Automatic conveyor technology with sludge distribution, including full fill control and level monitoring
- Electrical control system
- Delivery, installation, commissioning, process training
Implementation
Following the construction kick-off meeting, an intensive planning phase was followed by the implementation of an optimal process solution and its integration into the existing structure in mid-2024, in line with the ideas of the operator and the engineering firm.
The guaranteed values have been far exceeded
Since commissioning in August 2024, the resulting digested sludge with 3–3.5% dry matter and 51–54% loss on ignition has been dewatered to over 32–35% dry matter. The guaranteed values specified in the offer have been far exceeded in practice, much to the delight of the operators.
We would like to take this opportunity to thank the town of Regen, the entire operating staff, and the responsible planning office, EBB Ingenieurgesellschaft, for placing their trust in us, and we wish them continued success with the installed systems.
