Enhancing Biological Nutrient Removal: Nansemond WWTP Client: Hampton Roads Sanitation District Location: Suolk, VA The Hampton Roads Sanitation District, in Suolk, VA, needed to increase the capacity of its Nansemond WWTP from 10 to 30 mgd to accommodate its growing service area. HRSD also faced stricter standards for nutrient levels in the plant’s discharge as part of the Chesapeake Bay Act. HRSD retained Hazen and Sawyer to evaluate alternatives and design facilities for expanding the plant and achieving BNR goals. Project Outcomes and Benefits Designed a plant expansion and upgrade that meets a total nitrogen limit of 8 mg/L year-round and 1 mg/L total phosphorus year-round. This includes new supplemental carbon feed facilities capable of utilizing methanol, ethanol, glycerin, Micro

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