Ozone used to reduce wastewater sludge

Xylem’s Wedeco Ozone Technology Reduces Wastewater Plant Sludge By 43 Percent

Xylem,a leading global water technology company dedicated to solving the world’s most challenging water issues, successfully reduced the amount of sludge produced by a wastewater treatment plant in Ardea, Rome in Italy by 43 percent, saving more than €170,000 annually in landfill costs. Xylem’s Wedeco SMO evo ozone system that reduced the sludge also delivered a significant reduction in man hours required to remove and dispose of sludge produced.

The municipality of Ardea launched a significant redevelopment programme, central to which was the creation of an efficient wastewater treatment service capable of treating wastewater for the population of more than 70,000. It was necessary to increase the capacity of the existing plant in order to meet future population growth in the region.

Another key requirement of the wastewater treatment solution was to reduce the amount of sludge produced in order to decrease disposal costs and man hours. It was also essential that it deliver a consistent and stable treatment service throughout the year.

Despite the use of centrifugal pumping capable of eliminating most of the moisture, the plant at Ardea produced 3,000 tonnes of sludge per year which had to be disposed of. Xylem recommended its Wedeco ozone technology which successfully reduces the amount of sludge produced as well as dramatically reducing the amount of filamentous bacteria.

Xylem’s Wedeco ozone solution has delivered a dramatic improvement to the plant’s performance, reducing the amount of sludge produced by 1,300 tonnes per year.

About Xylem
Xylem (XYL) is a leading global water technology provider, enabling customers to transport, treat, test and efficiently use water in public utility, residential and commercial building services, industrial and agricultural settings. The company does business in more than 150 countries through a number of market-leading product brands, and its people bring broad applications expertise with a strong focus on finding local solutions to the world’s most challenging water and wastewater problems. Xylem is headquartered in Rye Brook, N.Y., with 2013 revenues of $3.8B and more than 12,500 employees worldwide. Xylem was named to the Dow Jones Sustainability Index for the last three years for advancing sustainable business practices and solutions worldwide.

The name Xylem is derived from classical Greek and is the tissue that transports water in plants, highlighting the engineering efficiency of our water-centric business by linking it with the best water transportation of all — that which occurs in nature. For more information, visit www.xyleminc.com.

With the experience of more than 250,000 systems installed worldwide and technical expertise in the field of ultraviolet and ozone technology since 1975, WEDECO is one of the most progressive brands in the area of water purification. Interdisciplinary research groups made up of engineers, biologists, doctors and physicists work to continuously develop and optimize the WEDECO systems. As a result, around the world, WEDECO water treatment systems are playing a critical role in ensuring the availability of water that is safe for humans and the environment. For more information about WEDECO products, visit www.xylem.com/treatment.