Kiron Lemna Covered Aerated Lagoon
Kiron, IA | Public Works
ISG worked with the City of Kiron to design an aerated lagoon with top quality disinfection systems.
The City of Kiron needed a wastewater treatment system that incorporated innovative disinfection processes.
ISG designed a new system consisting of a covered two-cell aerated lagoon with a LEMNA polishing reactor and UV disinfection. A sewage grinder was included in the inlet structure for the lagoon. The existing collection system had two separate force mains that were extended, and flow meters were added to measure the flows coming from both systems. The covered aerated lagoon was designed to handle increased loading from the Infiltration and Inflow (I/I), retain heat during winter months (which decreases the footprint needed for the nitrification process in the polishing reactor), and attain the level of treatment required by the IDNR stream standards and the excess I/I. The operation requirements are now consistent with the City’s mechanical plant, and the improvements also include design and construction services related to the UV disinfection system to comply with E. coli and other bacteriological compliance requirements.