Nutrient Removal Upgrades » Donohue & Associates, Inc. Client: Village of New Lenox Location: New Lenox, Illinois The Village of New Lenox owns and operates three water reclamation facilities. Water reclamation facility number 1 (known as STP No. 1) is a 2.5 mgd, single stage nitrification facility, which was tasked with meeting new effluent phosphorus limits by November 2013. Donohue & Associates was retained to complete the planning, design, and construction-related services for the facility. The existing facilities at STP No. 1 did not include biological or chemical phosphorus removal facilities. One limitation of biological phosphorus removal was the existing 30-year-old centrifugal blowers, which were oversized and inefficient. The layout resulted in elevated oxygen concentrations in

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