Kingsley Wastewater Treatment

Kingsley Wastewater Treatment

Kingsley, IA

Changes to the State of Iowa’s water quality standards resulted in anticipated NPDES effluent limits that the existing continuous discharge aerated lagoon was not capable of meeting, particularly in the colder months. In addition, the City anticipates significant growth over a 20-year planning period. Following a detailed alternatives analysis, ISG recommended retrofitting the existing wastewater treatment lagoons using a Submerged Attached Growth Reactor (SAGR) provided by Nelson Environmental of Winnipeg, Manitoba, Canada.

The SAGR is primarily designed to provide nitrification (ammonia removal) in cold to moderate climates. The SAGR consists of a submerged gravel bed with evenly distributed wastewater flow across the width of the cell providing the necessary surface area for growth and attachment of a nitrifying biomass within the bed. The gravel bed is covered with a layer of peat or mulch for insulation. Aeration throughout the floor of the SAGR provides aerobic conditions that are required for nitrification. An effluent ultraviolet disinfection system also allows the City to meet more stringent bacterial limits during summer months.

Since the Iowa Wastewater Facilities Design Standards did not specifically address the SAGR type process, the Iowa DNR had to perform a technology analysis in order for Kingsley to proceed with the project. Based on the IDNR review, the SAGR system was approved as an acceptable alternative technology, and the City of Kingsley proceeded with one of the first installations in Iowa using the SAGR technology.

Public Works

  • Alta Wastewater Treatment Plant

  • Cherry Street Ramp

  • Fairmont Water Treatment Plant

  • Goodhue Water Tower

  • Humboldt Pavement Management Study

  • Kingsley Wastewater Treatment

  • Lawton Water Treatment Plant

  • Madison Lake Regionalization

  • Mill Creek Bridge

  • Moville Comprehensive Plan

  • Sample Street

  • Second Street Ramp

  • Sibley Parkway

  • Sloan Wastewater Treatment Plant

  • South Front Street Reconstruction

  • Sumner Avenue Town Square

  • Trunk Highway 60 Downtown Reconstruction and Improvements

  • US Highway 14 Roundabout

  • US Highway 20

  • US Highway 59

  • West Lakeshore Drive