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New biomass boiler to Wisconsin, North America


CTS Engtec is engineering a power plant boiler to North America. The Biomass Energy Project is carried out in Domtar Corporation's Rothschild paper mill site inWisconsin, United States. Domtar and We Energies are partnering to build a 50-MW biomass-fueled cogeneration power plant.

CTS Engtec´s assignment includes preliminary and detailed engineering of the boiler house pipework (Boiler External Piping, Non-Boiler External Piping and Duct Piping) as well as preliminary engineering of the ductwork.

The contract concerning engineering of the biomass boiler has been concluded between CTS Engtec and Metso Power. The start-up of the plant is scheduled to begin by the end of the third quarter of 2013.

This Weecymic –project is a continuation of CTS Engtec´s ASME standards-based projects which are now expanding to the power plant sector. Following the ASME standards ensures that the project will be implemented in compliance with the regulations and quality criteria of the host country. The recently founded Calculation section of CTS Engtec has the comprehensive capabilities to carry out design also according to the ASME standards.

Metso to supply the boiler

Metso is the supplier of the biomass boiler to the We Energies/Domtar.  The biomass boiler is a key component of a major investment to build a new biomass-fueled cogeneration power plant.

The biomass boiler plant will utilize circulating fluidized bed (CFB) technology and will use waste wood from logging and mill activity, tree trimming and sawdust as the main fuel. The plant will produce approximately 50 megawatts of renewable electric power and provide process steam to the mill.

Wood, wastewood and sawdust will be used to produce 50 megawatts of green electricity for the grid and to support Domtar’s papermaking operations in Rothschild under a steam supply agreement. The project will result in a highly efficient use of bio-mass resources and Domtar mill’s infrastructure while allowing Domtar to retire less efficient boilers, virtually eliminating its use of fossil fuels at the mill.

Domtar to participate in the Biomass-fueled power plant

With the combination of the biomass facility’s air quality technology and the retirement of Domtar’s existing boilers, We Energies anticipate that the new facility will reduce the overall emissions from the mill site by approximately 30 percent. It will help meet the state’s requirement to produce eight-percent of its power from green sources by 2015.Combined heat and power cogeneration is more efficient use of biomass fuel than producing steam and electricity separately. The new plant will use the existing brownfield site on the Domtar paper mill property and share the mill’s infrastructure and resources.

“This project is an innovative way to improve our mill’s competitiveness and environmental performance while providing more green power to the State of Wisconsin,” said John D. Williams, President and Chief Executive Officer of Domtar.


Further information:

Antti Surokivi, Director, Energy, CTS Engtec, mob. +358 50 5988 200
Antti Lahtinen, Project Manager, CTS Engtec, mob.+358 40 1541 651


Domtar is an international paper manufacturer with facilities across the U.S. and Canada. Domtar Corporation is the largest integrated manufacturer and marketer of uncoated freesheet paper in North America and the second largest in the world based on production capacity, and is also a manufacturer of papergrade, fluff and specialty pulp.. The Company employs approximately 8,500 people.


We Energies (Wisconsin Electric Power Company) is a Milwaukee-based electricity, natural gas and steam service provider to residents in southeast Wisconsin, the Fox Valley and Michigan’s Upper Peninsula. The We Energies/Domtar Biomass Energy Project is owned by We Energies, an investor-owned electric utility company based in Milwaukee, Wisconsin, USA. We Energies serves more than 1.1 million electric customers in Wisconsin and Michigan’s Upper Peninsula and more than 1 million natural gas customers in Wisconsin.


Metso is a global supplier of sustainable technology and services for mining, construction, power generation, automation, recycling and the pulp and paper industries. They have about 29,000 employees in more than 50 countries.


ASME, founded as the American Society of  Mechanical Engineers in 1880 has nowadays over 120,000 members in over 150 countries. ASME is the leading international developer of codes and standards associated with the art, science, and practice of mechanical engineering. Starting with the first issuance of its legendary Boiler & Pressure Vessel Code in 1914, ASME's codes and standards have grown to nearly 600 offerings currently in print. These offerings cover a breadth of topics, including pressure technology, nuclear plants, elevators / escalators, construction, engineering design, standardization, and performance testing.




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