Arlington East BNR Upgrade to Receive 2011 FICE Engineering Excellence Award

Since construction has been completed, the Arlington East WRF is operating better than expected, with effluent total nitrogen concentrations below 4 mg/L.

(HOLLYWOOD, FL – January 12, 2011) – The Arlington East BNR Upgrade has been selected to receive an Honor Award in the 2011 FICE Engineering Excellence Awards Program.

Hazen and Sawyer worked closely with JEA, the largest community-owned utility in Florida and the eighth largest in the United States, to convert the Arlington East WRF, a 20-mgd secondary treatment plant originally constructed in the 1970s with no nutrient removal, to a 25-mgd nutrient removal facility.

The Arlington East WRF BNR Upgrade project provided JEA with a low-cost solution to significantly reduce nutrient discharges to the St. John’s River Basin by meeting a goal of 5.6 mg/L total nitrogen (TN) effluent concentration and rerating the plant to 25 mgd, all without adding additional aeration basins or chemical feed. The novel secondary treatment process incorporates step feed and internal recycle pumping and maximizes the use of existing infrastructure, influent carbon, and denitrification capacity to meet strict nitrogen removal requirements without requiring chemical feed.

Since construction has been completed, the plant is operating better than expected, with effluent total nitrogen concentrations below 4 mg/L. Overall, this project demonstrated that a cost-effective solution for optimizing total nitrogen removal is achievable. The partnership between Hazen and Sawyer and JEA resulted in a project that came in under budget, was completed four months ahead of schedule, and ultimately saved JEA over $10 million in nutrient removal costs.

Since our founding in 1951, Hazen and Sawyer has focused on two things: providing safe drinking water and controlling water pollution. Our range of services encompasses the planning, design, and construction management of water and wastewater-related projects – from clean water treatment, storage, and distribution to wastewater and stormwater collection, treatment, and reuse.

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