The ANDRITZ Sludge2Power solution is an innovative process designed for efficient and environmentally friendly treatment of sewage sludge. This technology uses adiabatic combustion principles, which ANDRITZ provides through its EcoFluid bubbling fluidized bed solution (BFB). The technology operates without any heat exchange in the combustion chamber and reduces the volume of the sludge while converting it into valuable and phosphorous-rich ash without the necessity of external fossil fuels and thereby reducing greenhouse gas emissions.
Consequently, the combustion process enables a climate-friendly circular economy - sewage sludge that contains bacteria, medication residues, micro plastic, and other pollutants is turned into a pre-product for the recovery of the precious resource phosphorus instead of being directly used as a fertilizer on agricultural land. The Sludge2Power concept is the result of ANDRITZ’s Power2Innovate initiative that focuses on customer-centric thinking.
Thomas Strasser
Director Sales, Multifuel Boiler Plant, ANDRITZ
Thomas Strasser, Director of Sales, Multifuel Boiler Plant at ANDRITZ says, “The real advantage of our adiabatic solution is the modularity that enables us to have flexibility and agility. With the modular concept, we are able to provide sludge boiler plants with a very efficient layout arrangement for wastewater treatment facilities serving local populations from 500,000 to 5 million inhabitants.”
The ANDRITZ adiabatic sludge treatment technology is designed to utilize the energy of municipal sewage sludge for production of district heat and/or electric power. This is realized by pre-heating combustion air to a high degree and utilizing this recovered heat to enable a self-sustained combustion even at heating values as low as 3 MJ/kg.
ANDRITZ technology powers the world´s largest sludge treatment plant
“The compact design facilitates the exploitation of site-specific synergies such as the mono-incineration of sewage sludge at the location of a municipal waste incineration plant,” continues Strasser. “In addition, we provide ANDRITZ’s cutting edge combustion technology that fulfills the strictest environmental regulations by reaching the lowest emission values (e.g., N2O). We are able to deliver a broad range of ANDRITZ solutions such as sophisticated flue gas cleaning solutions, driers, burner technology including automation and digitalization systems, as well as other products as a one-stop-service.”
ANDRITZ also provides long-term service agreements and expanded life cycle services for operational reliability for sludge plants.
Benjamin Klammer
Sales Project Manager, Multifuel Boiler Plant, ANDRITZ
ANDRITZ has already received significant orders for its modular adiabatic sludge solutions, including most recently from two German companies, MVA Bielefeld-Herford GmbH, Bielefeld, and Kommunale Nährstoffrückgewinnung Niedersachsen GmbH (KNRN), Hildesheim.
The scope of supply to MVA Bielefeld-Herford includes an ANDRITZ EcoFluid bubbling fluidized bed (BFB) boiler system for a new sewage sludge mono-incineration plant. The installation will ensure the reliable disposal of sewage sludge and enable the recovery of valuable phosphorus. Furthermore, the steam generated by incineration will be supplied to the existing waste incineration plant that produces energy for the national grid and heating for the local district heating system.
The KNRN order for its plant at Hildesheim includes equipment for sewage sludge reception, conveying, drying including vapor condensation, and incineration with an adiabatic EcoFluid bubbling fluidized bed (BFB) boiler system. The scope of supply also includes a multi-stage flue gas cleaning system, steam turbine, generator, water-steam cycle, and additional auxiliary systems.
Benjamin Klammer, Sales Project Manager, Multifuel Boiler Plant, at ANDRITZ comments, “The feedback from the market and especially our customers shows that we did our job. These contracts prove that we are well prepared for future developments in key market segments that are fully in line with ANDRITZ's corporate strategy and commitment to deliver sustainable technologies and solutions to our customers and support decarbonization, sustainability, and a circular economy.”
Sebastian Kaiser
Director of Technology, Multifuel Boiler Plant, ANDRITZ
TRANSFORMING WASTE INTO VALUABLE RESOURCES
Power2Innovate is an internal innovation program launched by ANDRITZ Power Boiler Plant division to foster customer-centric thinking and entrepreneurial spirit among all employees. The program focuses on renewable energy transition, CO₂ reduction, recycling, and alternative fuels as our customers' current and future challenges.
The program aims to lead to the development of advanced technologies that can be implemented on a larger scale. By doing so, ANDRITZ hopes to contribute significantly to environmental sustainability and resource efficiency and to set new standards in waste management and energy production.
Sebastian Kaiser, Director of Technology, Multifuel Boiler Plant, ANDRITZ, explains, “Power2Innovate is a systematic development process, starting from the customer's view to the business plan and ending in technological development. The initiative invites every team member to contribute ideas, develop business models and—only after validation—transition into structured R&D projects. This two-phase approach ensures that innovation is both market-driven and technically feasible.”
The initiative included 25 volunteers out of 130 employees who came up with more than 25 ideas on new innovations relating to multifuel boiler plants. Kaiser continues, “We filtered all the ideas down to six, which have been further developed by the teams. The selection of the winning ideas was made by division management. Due to the success of the Sludge2Power solution, the Power2Innovate initiative has been continued and is already working on the next innovation with a focus on recycling.”
Optimizing the treatment of sewage sludge
ANDRITZ offers technologies for producing steam and electricity from renewable fuels as well as for the efficient use of traditional fossil fuels. These technologies employ proven, yet modern techniques to efficiently produce power while keeping the emissions within environmentally safe limits.
ANDRITZ offers technologies for producing steam and electricity from renewable fuels as well as for the efficient use of traditional fossil fuels. These technologies employ proven, yet modern techniques to efficiently produce power while keeping the emissions within environmentally safe limits.
RBB KSVA Vermögensgesellschaft mbH & Co. KG (RBB) has selected international technology group ANDRITZ to build a cutting-edge sewage sludge mono-incineration plant at the Böblingen waste incineration site in Germany.
EcoFluid bubbling fluidized bed boilers form an important part of ANDRITZ bio-energy solutions and are used for steam and power generation from biomass and different alternative fuels, such as sludges, RDF, and residues.
PowerFluid circulating fluidized bed boilers are used for steam and power generation from coal and biomass – and for co-incineration and incineration of biogenous residues and wastes with high calorific value.
Wir bieten innovative Lösungen im Bereich Energieerzeugung und Umwelttechnik. Als Lieferant von Dampferzeugern, Rauchgasreinigungsanlagen und Serviceleistungen garantieren wir mit unseren Anlagen und Systemen bewährte Qualität und hohe Energieeffizienz.
ANDRITZ TermoEnergetskaPostrojenja d.o.o. – abbreviated to ANDRITZ TEP d.o.o. (limited liability company) and formerly known as Đuro Đaković TEP – is a well-established Croatian company with over 100 years’ experience in the production of boiler plants for various kinds of fuels.
