Home » Case Studies

Bioprocess Intelligent Optimization System (BIOS) at Enfield Water Pollution Control Facility

« back to Case Studies

[photo: Enfield Water Pollution Control Facility]

FACILITY BACKGROUND

Located in Town of Enfield, CT
Treats an Average Daily Flow of 5.5 MGD
Myratek BIOS Commissioned in Jan 2004

PRODUCTS UTILIZED

Myratek BIOS DO, IRQ, and WAS Control
One Myratek AD 2000 Ammonium Analyzer
One Myratek Sentry C-2 Ammonium and Nitrate Analyzers

FACILITY PROFILE

2006 TMDL of 405 lbs Total Nitrogen per day
Excess nitrate credits sold in 2006 for a profit of $17,448 as part of Long Island Sound Credit Trading Program
AOAO Treatment Process

PROJECT NARRATIVE

After studying the positive effects the BIOS could have on the treatment process, the Town of Enfield commissioned a study to quantify the benefits of the BIOS. One process train was converted to utilize BIOS control of DO and IRQ set-points, and compared to another train under traditional fixed control.The results of this study were a decrease in total nitrogen (TN) of 32% in the BIOS controlled train coupled with a decrease of aeration requirements of 19%. Because of these positive results, all four treatment trains were converted to utilize the BIOS. In March 2006, a waste flow rate control module was added to the BIOS. In 2007 a carbon dosing control module will be added to regulate the amount of carbon added to a post-anoxic zone.

[Graph: Average Air Flow Rates]