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November 2024

Archer Western-Stantec design-build team selected for City of Chattanooga鈥檚 Class A biosolids and wastewater process optimization project

CHATTANOOGA, TN - The Archer Western-Stantec design-build team has been selected to complete Phase 1 of a Class A Process Optimization for Wastewater Energy Recovery (POWER) project and wastewater treatment plant upgrades for the City of Chattanooga Moccasin Bend Environmental Campus. Archer Western Construction will serve as the lead contractor while Stantec, a global leader in sustainable design and engineering, will lead design and engineering.

This progressive design-build project is expected to incorporate a thermal hydrolysis process (THP) facility, anaerobic digestion upgrades, and conversion of a high purity oxygen facility to a membrane aerated biofilm reactor (MABR). Upon completion, the project will be the largest MABR facility in the world. MABR is an energy-efficient, intensified nutrient-removal process that will allow the city to utilize its existing tanks rather than having to build new ones鈥攚hile meeting future nutrient limits in effluent discharged from the Moccasin Bend Environmental Campus.

Wastewater infrastructure designed to minimize costs and maximize capacity
To meet the City鈥檚 sustainability and operational goals, the biosolids portion of the project will integrate the THP facility within the existing biosolids treatment process, improving anaerobic digestion and biogas production while reducing the volume of biosolids for disposal. The facility will produce Class A biosolids that can be used as a soil additive for surrounding farms in the region. The biogas will also be reused to generate steam within the Moccasin Bend Environmental Campus, with the excess generating power for the facility.

鈥淚t鈥檚 a privilege for our team to support the City of Chattanooga, a long-time client, on its largest capital project under a U.S. EPA Consent Decree,鈥� said Harold Schmidt, wastewater sector director for the US South region at Stantec. 鈥淥ur team鈥檚 design will aim to meet the immediate and enduring wastewater infrastructure needs of the city using efficient, cost-effective processes.鈥�

鈥淎rcher Western is honored to partner with Stantec and the City of Chattanooga on this transformative project. We look forward to the close collaboration and progressive design-build delivery that will bring innovative, efficient upgrades to the City鈥檚 wastewater operations,鈥� said David Walker, vice president at Archer Western. 鈥淲orking alongside Stantec, we鈥檙e committed to delivering a state-of-the-art project that adheres to the highest standards of safety and quality to meet the City鈥檚 goals for energy reduction."

Supporting City initiatives
In support of the City鈥檚 green initiatives, this project will create a positive community impact with a design that focuses on sustainability and efficiency. The City has committed to a six-goal climate action plan to reduce disparities among socially and economically vulnerable communities, reach net zero-carbon emissions, achieve zero waste, build a more sustainable city, preserve and improve natural resources, and be a leader in the green economy. The project is an important step toward achieving zero carbon emissions by 2050

Walsh

WALSH CONSTRUCTION

929 West Adams Street
Chicago, Illinois 60607
T: 312.563.5400
F: 312.563.5466

Walsh

ARCHER WESTERN

2839 Paces Ferry Road SE
Suite 1200
Atlanta, Georgia 30339
T: 404.495.8700
F: 404.495.8701

Walsh

WALSH CANADA

36 York Mills Road
Suite 302
Toronto, Ontario M2P 2E9
T: 416.849.9000
F: 416.849.9100

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