Using SBR technology to cost effectively accommodate future BNR requirements

Description:Using sequencing batch reactor (SBR) technology to cost effectively accommodate future biological nutrient removal requirements. Presenter: Steve Green, Xylem Inc. Additional Contributors: Scott Mulinix, P. Eng., Brown Deer, WI. This presentation demonstrates the flexibility of the Intermittent Cycle Extended Aeration System (ICEAS) to adapt to future biological nutrient removal (BNR) requirements in a cost effective manner. In 1999 the Rock Creek Public Sewer District (RCPSD) selected a new treatment system to consolidate treatment capacity while planning for future growth. The ICEAS technology was chosen on the basis of footprint, peak flow capacity, and BNR efficiency. The ICEAS process is a modification of the sequencing batch reactor (SBR), allowing continuous inflow of wastewater into the treatment basins during all phases of the cycle. The new facility was commissioned in 2004 with average flow and peak flow capacity of 4.8 and 16.7 MGD respectively. Initially, RCPSD was required to meet BOD5, TSS, and NH4-N limits, but future requirements of total nitrogen (TN) and total phosphorus (TP) removal were anticipated. With future nutrient removal expectations, the ICEAS reactor and supporting equipment were designed to accommodate the more stringent requirements. Installing all of the equipment initially was not necessary as effluent TN and TP limits were relaxed for the first six years of operation. In 2010, the district added mixers and the treatment cycle was modified with alternating periods of aeration and anoxic mixing during the react phase to address TN and TP limits. After upgrading, the RCPSD WWTP produced effluent below expected future permit limits, while maintaining exceptional BOD5, TSS and NH4-N removal.

Authors: Steve Green

Subjects: Wastewater

Tags:AC2015,AC15,2015 BCWWA Annual Conference & Trade Show

Citation:stream 6: Building Resilience

Publication Date:May 28th, 2015 Upload Date:Jun 25th, 2015

Resource Library



User Login
Enter your e-mail below and click the "Submit" button. If you are in our database, your login and password will be sent to you immediately.
InstructorNet Login
Enter your e-mail below and click the "Submit" button. If you are in our database, your login and password will be sent to you immediately.
DirectorNet Login