PROJECT: Shippensburg wastewater treatment plant biological nutrient removal (BNR) CHALLENGE: Provide practical and cost-effective solutions for the borough’s treatment plant with an 85 percent reduction of nitrogen and phosphorus by October 1, 2010, to meet the Chesapeake Bay clean-up initiative. SOLUTION: ARRO recommended conversion of the existing plant’s process to a multiple- stage BNR process with dissolved oxygen control and a f

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