Alta Wastewater Treatment Plant

Alta, IA | Water

Overview

After an evaluation, ISG designed a new activated sludge treatment system that is more energy-efficient and has a smaller footprint.


Opportunity

Originally constructed in the 1950's, the City of Alta's wastewater treatment plant could not meet recently updated water quality standards.

Solution

The City of Alta wastewater treatment plant utilized a trickling filter treatment system that was constructed in the 1950's and upgraded several times. Recent changes to the water quality standards required lower ammonia nitrogen and bacteria discharge limits that the treatment efficiency of the existing system could not meet.

Following an in-depth evaluation, ISG recommended that the City abandon the trickling filter plant and construct a new Aero-Mod, Inc. SEQUOX activated sludge system. This activated sludge treatment system is an innovative system that incorporates aeration tanks, clarifier tanks, and digester tanks into one unitized design. This system results in a more energy-efficient operation and a smaller footprint compared to other activated sludge designs, thereby lowering capital costs.

The new treatment system showed significant improvements over the existing system, yielding significant reductions of CBOD5, TSS, and ammonia compared to the former facility.


Market News

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June 22, 2020 (Waterloo, Iowa) – Based on its growing presence in eastern Iowa and efforts to give back to the community, ISG has received the 2020 Business of the Year Award from Grow Cedar Valley, an organization devoted to the growth of businesses in the region. ISG’s Waterloo office was honored as one of two businesses of the year (1-50 full-time employees), marking the firm’s growing impact in the region since expanding its footprint to Waterloo in 2018.
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