Activated Sludge Process
The Great Bend Plant is an activated sludge process in which living organisms are supplied with oxygen and mixed with the wastewater in large aeration tanks. The living organisms use the organic material in the wastewater as a food source, thus removing it and purifying the wastewater.
Ultraviolet Light Exposure
Following the activated sludge process, the treated wastewater (effluent) is exposed to ultraviolet light in order to disinfect it before it enters the river. The treatment is accomplished through a series of physical and biological processes.
The physical process is one in which inorganic waste debris such as sand, salt, iron, calcium, and other mineral materials are removed and dewatered from the wastewater and disposed of at the County Landfill.
Whereas organic wastes are chemical substances of an animal or plant origin in the biological processes, which are settled out in the primary clarifiers as sludge, thickened then heated in the anaerobic digesters as biosolids. The biosolids are then hauled to farmland and applied for beneficial agricultural use.