On December 12, Green Connect will meet off-site to tour the Yorkville Bristol Sanitary District facility, located at 304 River Road, Yorkville.
We will be walking outside so wear comfy shoes and warm clothes.
Info on YBSD:
The Yorkville-Bristol Sanitary District (YBSD) owns and operates a wastewater treatment plant (WWTP) in the City of Yorkville, Illinois that serves a population of approximately 19,000 and discharges into the Fox River. The plant is rated for a design average flow 3,620,000 gal/d and an organic load of 4,751 lb/d five-day biological oxygen demand (BOD5). The Boundaries of the Sanitary District encompass an area greater than 10 square miles. The facility planning area of the District is 34 square miles, and the estimated planned ultimate area to be served is approximately 50 square miles.
Wastewater enters the plant through medium screens to remove large materials such as rags and then the wastewater is pumped to fine screens for final removal of grit, grease, and other small materials. Next, the wastewater flows by gravity directly into the aeration tanks (biological process) where bacteria breaks down the wastewater into a stable odorless product. The bacteria then form a floc that is sent to the settling basins (final clarifiers) where they settle out under quiescent conditions, and a clear supernatant (clear water) is carried out over weirs. The clear water then goes to an ultraviolet (UV) contact tank for disinfection, re-aeration, and then flows directly to the Fox River. The solids that are produced by bacteria are either pumped to a Waste Activated Sludge (WAS) tank for aeration and storage or returned to the aeration tanks as Return Activated Sludge (RAS). WAS is thickened every weekday with a Gravity Belt Thickener (GBT), which is then sent to an Autothermic Thermophilic Aerobic Digester (ATAD). The ATAD process produces a high heat, destroys pathogenic bacteria, and stabilizes the sludge to meet a Class “A” biosolid. After the digestion process is complete, the excess solids are sent to a Centrifuge for final dewatering. This final dried sludge is then taken to a landfill for disposal.
The Chamber’s Green Connect meets monthly on the second Thursday, 11am-noon at the Chamber (or on-site at other locations as announced).
Visit the Green Connect web page.