Video library

Watch the videos below to learn more about the project and how solids are processed at the Metro Plant.

PROJECT OVERVIEW

Metro Plant Solids Management Facility Plan

 

The Metro Plant, located southeast of downtown Saint Paul, treats 180 million gallons of wastewater every day for 66 communities and processes 850 wet tons of solids every day for 73 communities.  The Metro Plant needs additional solids processing capacity to preserve existing wastewater treatment plant infrastructure and serve regional population growth.  MCES proposes to construct a fourth incinerator, found to be the most cost-effective and sustainable alternative to meet the region’s wastewater needs.  

How it Works

Processing Wastewater Solids at the Metro Plant


Wastewater solids are a renewable, carbon-based fuel source.  The goals of processing wastewater solids are to reduce volume, recover energy, and reduce or eliminate pathogens.  Solids at the Metro Plant are collected in settling tanks, thickened, and then dewatered before being sent to incineration. 

How it Works

The Incineration Process at the Metro Plant


The Metro Plant has been processing wastewater solids with incineration since 1938 and with fluid bed incinerators since 2005. Incineration of wastewater solids is an efficient thermal combustion process that reduces the quantity of solids by 95% and eliminates pathogens.

How it Works

Energy Recovery for Incineration at the Metro Plant


The Metro Plant incineration facilities can take what most people consider a waste and recover valuable energy from it. The energy recovered is used within the plant and reduces our utility bills by $2.5 million per year, ultimately passing those savings on to our customer communities.

How it Works

Air Pollution Control for Incineration at the Metro Plant


The Metro Plant incineration facilities have one of the most advanced, highest performing, and state-of-the-art air pollution control systems in the country. The existing incinerators have an exceptional track record of environmental compliance. They operate at well below the new, most stringent standards established by the U.S. Environmental Protection Agency for new incinerators.