BNR RATING OF THE ARLINGTON COUNTY WATER POLLUTION CONTROL PLANT THROUGH FULL-SCALE TESTING AND CALIBRATED MODELING
The Arlington County Water Pollution Control Plant (ACWPCP) is a tertiary treatment plant currently rated at 30 mgd, designed to meet monthly average discharge standards of CBOD5 ≤ 5 mg/L, TSS ≤ 6 mg/L and TP ≤ 0.18 mg/L. The plant was recently upgraded to meet a new ammonia standard (NH3-N ≤ 1.0 mg/L NH3-N/L in summer, and NH3-N ≤ 2.0 mg/L in winter). The plant is also required to remove nitrogen (TN ≤ 8mg/L) on a yearly basis and to reduce the number of plant bypasses that occur during wet weather operating conditions. Significant challenges existed in the plant upgrade project; including no redundancy in the Aeration Tank and Secondary Clarifier infrastructure, low available hydraulic head across the site, a constrained site and limited budget. A decision was made to construct a new Primary Effluent Equalization Tank, retrofit the existing Aeration Tanks, construct one additional Aeration Tank and retrofit the Secondary Clarifiers as part of the BNR upgrade. The retrofitted and expanded BNR facility would be tested under normal and stressed operating conditions. Data derived from the full-scale testing would be utilized to calibrate the activated sludge process simulation model, to give a reliable plant rating and determine essential future facilities. The Arlington County WPCP is unique in the sense that it is one of the first multiple-pass, step-feed BNR processes to be constructed in the eastern USA. The practical experience with this plant will be of interest to municipalities considering BNR upgrades to their existing facilities.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
Document Type: Research Article
Publication date: 2003-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites