Kingsley Wastewater Treatment Plant

Kingsley, IA | Water

Overview

ISG designed the retrofit of existing wastewater treatment lagoons for the City of Kingsley, enabling more compliant and higher capacity wastewater treatment processes.


Opportunity

Anticipating growth over a 20-year planning period and with its wastewater treatment facilities no longer able to keep up with local standards, the City of Kingsley needed a water solutions partner to design system updates.

Solution

The City of Kingsley’s existing continuous discharge aerated lagoon was not capable of meeting NPDES effluent limits after changes were made to Iowa’s water quality standards. Following a detailed alternatives analysis, ISG recommended retrofitting the existing wastewater treatment lagoons using a Submerged Attached Growth Reactor (SAGR). 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.


Market News

Mankato MoonDogs’ Franklin Rogers Park to be Renamed ISG Field

October 20, 2020 (Mankato, Minnesota) – Building on a series of successful partnerships and projects to bolster its ballpark, the Mankato MoonDogs, a member of the Northwoods League, has exercised its rights with the landlord, the City of Mankato, to lease the naming rights of Franklin Rogers Park to ISG. The ballpark will be named ISG Field after the professional design and engineering firm that was founded in Mankato in 1973. ISG Field represents the MoonDogs’ commitment to providing top quality local baseball and an enriching fan experience. This is the latest update for the team, which has unveiled a new logo and has implemented several renovations for the ballpark in recent years.
Read More

ISG Accelerates Growth with New Office in Rochester, Minnesota

October 13, 2020 (Rochester, Minnesota) – ISG, a leading professional design firm in architecture, engineering, planning, and environmental solutions, announces plans to open a new office in Rochester, Minnesota. The addition will allow the firm to better serve its existing and growing client base and leverage the area’s diverse talent pool. The office will be the firm’s fourth location in Minnesota, adding to its six other offices across the Midwest in Wisconsin, Iowa, and South Dakota.
Read More