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Advanced Digital Optimization Solutions From Xylem Reduce Sewer Overflows by 247 Million Gallons Annually

By: 3BL Media

Innovative installation saves money while advancing sustainability

SOURCE: Xylem Inc.

DESCRIPTION:

The Metropolitan Sewer District (MSD) of Greater Cincinnati serves an Ohio population of more than 850,000 spread out across 290 square miles. Like many large cities, Cincinnati MSD operates combined storm water and sanitary sewer systems, some of which were constructed more than a century ago. These systems were built to collect rainwater runoff, domestic sewage and industrial wastewater in the same pipe. Whether by design, or due to infiltration and inflow of storm water, they have a tendency to overflow, discharging untreated sewage into local waterways or flooding streets and basements.

Cincinnati’s sewers were discharging an average of 14.4 billion gallons of combined sewage every year into the Ohio River and its tributary streams within Cincinnati’s urban watershed. In 2002, the U.S. Environmental Protection Agency entered into a federal consent decree with MSD, mandating the elimination of sanitary sewer overflows and significant mitigation of combined sewer overflows into receiving waterways. Engineers estimated the cost to mitigate the sewer overflows through capital investments such as deep tunnel construction, at $3.1 billion, an unacceptable capital expense to pass along to MSD’s customers.

To overcome these challenges MSD partnered with Xylem to optimize the performance of their existing assets through advanced digital optimization solutions. Xylem worked with MSD to implement Xylem’s Wastewater Network Optimization solution, which utilizes a combination of sensors and weather data to create a real-time decision support system (RT-DSS). This platform delivers automated, optimized control of existing assets to reduce sewage overflows, improve storage and maximize treatment plant operations during wet weather.

The project was an overwhelming success. After MSD implemented a coordinated real-time control (RTC) program, overflow volumes were reduced by 247 million gallons annually (based on 2015 rainfall), a 45 percent reduction in overflow compared to the original design. Additionally, operational enhancements from the project increased treatment facility utilization by more than 100 percent, as a result of using the existing assets more efficiently.

MSD continues to expand the wastewater network optimization solution across their system, delivering savings to rate-payers, while protecting the local watershed to make the city more sustainable.

Learn more about Xylem’s digital solutions for water operators.

Learn more about how Xylem helps customers advance sustainability in their communities.

Tweet me: Advanced digital optimization solutions from @XylemInc reduce sewer overflows by 247 million gallons annually, saving money while advancing #sustainability: https://bit.ly/3fSvtC9

KEYWORDS: Xylem, Cincinnati, Metropolitan Sewer District of Greater Cincinnati, NYSE:XYL, water, wastewater

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