Metro Plant Solids Management Improvements
Metropolitan Council Environmental Services (MCES) owns and operates the Metropolitan Wastewater Treatment Plant (Metro Plant) in Saint Paul, Minnesota, which uses three existing fluid bed incinerators to process wastewater solids. MCES proposes to continue sustainable incineration at the Metro Plant by adding a fourth incinerator followed by renewal of existing incineration facilities. The fourth incinerator will include supporting energy recovery and air pollution control equipment. The fourth incinerator will require a small addition to an existing building and will be constructed entirely within the Metro Plant property boundary.
The Metro Plant needs additional solids processing capacity to:
Planned renewal projects will require extended downtime of the existing incinerators.
500,000 new residents in the Twin Cities Metro Plant service area by 2050.
Planning began in 2015 and MCES engaged in outreach in 2018 meeting with local and county governments, regulatory agencies, and
neighborhood groups. The Metropolitan Council approved the Facility Plan in October of 2018.
The fourth incinerator project will be delivered through a design build approach. Air permitting and preliminary design for the fourth
incinerator is expected to be completed by the end of 2023. Design-build construction of the fourth incinerator is anticipated to be
completed by the end of 2027. Renewal of the existing incinerators is expected to be complete by the end of 2030.
2015 PLANNING PROCESS 2020
The fourth incinerator is the most cost effective and sustainable alternative to meet the region’s wastewater needs.
It will have the lowest community impact and will improve the reliability of the wastewater treatment system.
EXCEPTIONAL AIR QUALITY
The fourth incinerator will meet strict air emission standards, ensuring protection of human health and the environment.
A fourth incinerator will not generate additional odors or require land acquisition, providing the lowest impact to surrounding communities.
Incineration recovers enough energy to power 800 homes. The energy recovered is used in the plant and saves ratepayers $1.8 million per year.
Adding a fourth incinerator costs 50% less to construct, operate and maintain than any other solids processing alternative.
LOW GREENHOUSE GASES
Greenhouse gas emissions are similar to other alternatives, insignificant compared to other industries and are offset through energy recovery.
The fourth incinerator will allow the Metro Plant to serve as backup to other MCES facilities, increasing reliability of the whole MCES system.
Click on the fact sheets below to learn more about specific topics related to the Metro Plant Solids Management Improvements Facility Plan.