Middleburg, PA

Nutrient Removal Upgrade

Larson Design Group (LDG) provided grant application assistance, survey, as well as mechanical, electrical, and plumbing engineering for the upgrade of a wastewater treatment plant in Middleburg, Snyder County, Pennsylvania. The project included upgrades to the existing 0.45 MGD wastewater treatment plant to meet total nitrogen and total phosphorus limits required by the Chesapeake Bay Initiative. Process control was upgraded to achieve simultaneous nitrification/denitrification in the aerated lagoons using a programmable logic controller, dissolved oxygen (DO) probes, and variable speed positive displacement blowers and automated aeration system valving. The project was funded using a combination of PENNVEST low interest loan and PA H2O grant funds. In addition to assisting with the preparation of funding applications, LDG was responsible for administering these funds for the duration of the project.

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