ANDRITZ has been awarded a turnkey contract by KNRN to build a sewage sludge mono-incineration plant at Hildesheim’s port, with the undisclosed order value booked in Q3 2025. The facility will process 33,500 t of dry sludge annually from 21 municipalities in Lower Saxony. ANDRITZ’s scope includes reception, conveying, drying with vapor condensation, EcoFluid BFB incineration, multi-stage flue gas cleaning, steam turbine and generator, water-steam cycle, and auxiliary systems. By mono-incinerating sludge, the plant produces phosphorus-rich ash for resource recovery under Germany’s AbfKlärV regulation. The generated steam will power electricity generation for the public grid and provide heat to the district heating network. Dr. Jens Manthey of KNRN praised ANDRITZ’s tailored, low-emission solution, while ANDRITZ’s Benjamin Klammer highlighted the project’s contribution to the circular economy. The plant is slated to enter service in December 2027.
International technology group ANDRITZ has secured a contract from Kommunale Nährstoffrückgewinnung Niedersachsen GmbH (KNRN) to deliver a dedicated sewage sludge incineration facility at the Port of Hildesheim. The value of the order remains confidential and will be recorded in ANDRITZ’s Q3 2025 order intake.
KNRN Managing Director Dr. Jens Manthey commented, “ANDRITZ’s proposal offered precisely the advanced technology we needed. We’re delighted to partner with a globally renowned supplier to build a plant that combines minimal emissions, top environmental performance, and strong economic viability.”
Under the agreement, ANDRITZ will provide a complete systems package: reception and conveying equipment, sludge drying with vapor condensation, and incineration via its EcoFluid bubbling fluidized bed (BFB) boiler. The delivery also covers a multi-stage flue gas cleaning train, steam turbine with generator, water-steam cycle, and all essential auxiliary systems.
Designed for 33,500 tonnes of dry matter annually, the plant will process sludge from 21 Lower Saxony municipalities. Mono-incineration produces phosphorus-rich ash that meets German sewage sludge regulation (AbfKlärV) requirements for phosphorus recycling—a critical step for sustainable resource management. The heat and steam generated will feed a turbine for electricity export to the public grid and supply heat to the local district heating network.
“Winning this contract highlights our ability to tailor cutting-edge solutions to our customers’ needs,” said Benjamin Klammer, ANDRITZ Project Manager, Sales. “We look forward to working with KNRN to advance circular-economy goals.”
ANDRITZ will undertake engineering, equipment supply, installation, and commissioning of the core facility. Commercial operation is expected to commence in December 2027.
