Case "Evansdale": 7 Options to Update a Wastewater Treatment Plant

Case "Evansdale": 7 Options to Update a Wastewater Treatment Plant

The City of Evansdale is facing a serious decision on how to upgrade their old wastewater treatment facility due to the lack of flood protection, as well as disinfection.

The City is currently reviewing seven options:

  1. Rising the structures of the existing wastewater facility above the five-year flood level, installing a higher access road, putting in a remote operating system and installing a disinfection system;
  2. All the above, plus making sure to meet nutrient reduction goals, lowering the city’s current nitrate and phosphorous loads going into the Cedar River sludge with  a sequencing batch reactor;
  3. Same as no 2, yet by utilizing aerobic granular sludge (a 30-year-old European technology not yet approved by the Iowa DNR);
  4. Building a brand-new wastewater treatment plant at a new location with the old sludge technology;
  5. Building a brand-new wastewater treatment plant at a new location with the new sludge technology;
  6. Scrappibg Evansdale’s plant, building new pump stations and hooking up their infrastructure to an existing plant;
  7. Hooking into the already-combined Elk Run Heights/Raymond plant.

Read about this project in detail on The Courier