Challenge

At the Big Flat Creek Water Reclamation facility located in Loganville, Georgia a new wastewater treatment plant was needed to meet regulations for stream discharge as well as enhance treatment for land application of the effluent. 

Solution

To meet their requirements, the facility chose to install a  two-tank OMNIFLO® Sequencing Batch Reactor (SBR) system from Siemens Water Technologies.  The system was designed to treat 2.0 million gallons per day (MGD) that included a state-of-the-art control system providing the flexibility to manager the wastewater treatment process with efficiency and very little maintenance.

The OMNIFLO® SBR is a fill-and-draw, non-steady state activated sludge process in which one or more reactor basins are filled with wastewater during a discrete time period and then operated in a batch treatment mode.  The SBR process accomplishes equalization, aeration and clarification in a timed sequence in a single reactor basin. 

Results

The Big Flat Creek Water Reclamation facility was started up in March 1999 with an expansion completed in 2001.  The OMNIFLO® SBR process has been exceeding expectations with up to 250,000 gallons per day (gpd) of treated effluent pumped to a land application holding basin.  This in turn is pumped to one of four spray fields for disposal.  The biosolids are treated in one of two aerobic digesters with a centrifuge facility providing either thickening or dewatering of the digested sludge.  The thickened sludge can either be returned to the digester or discharged for land application.

The following chart shows the performance results.

	BOD		TSS		AMMONIA
	Influent mg/l	Effluent mg/l	Influent mg/l	Effluent mg/l	Influent mg/l	Effluent mg/l
Design	250	10	225	10	20	1.7
Actual	380	6	300	5	15	20

In 2004 this facility was presented the award for the "Best Operated Plant of the Year" by the Georgia Water and Pollution Association.

For more information, download the complete case study:

OMNIFLO® SBR Installation at Water Reclamation Facility