Madison Sewerage District’s new technology to turn phosphorus into fertilizer pellets

Jun 2, 2014

The Cap Times

The Madison Metropolitan Sewerage District is using cutting-edge technology to try and tackle the problem of phosphorus in area lakes.

The district spent roughly $40 million to upgrade the Nine Springs wastewater treatment plant off South Towne Drive. It processes wastewater from a number of cities, villages and towns in the greater Madison area.

Plans for the project have been in the works since 2008.

The district partnered with British Columbia-based Ostara, on a portion of the upgrade that relates to a completely new nutrient recovery, or phosphorus harvesting system.

The system will help reduce nutrient management costs, resolve costly nutrient build-up, and help the district meet new, more stringent phosphorus levels in the entire Yahara Watershed by capturing phosphorus in the dirty sewerage water and creating fertilizer pellets.

The recovery facility, which began operating in November, is one of the priciest for the district. Officials from the sewerage district, Dane County Executive Joe Parisi and Ostara officials, including board member Robert F. Kennedy Jr., will host an event Wednesday to highlight the latest plant addition.

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