A Created Wetland in Northeastern Arizona
Wastewater Treatment Facility
 The wastewater treatment
plant operated by the Pinetop-Lakeside Sanitary District is a 2 million gallon
per day activated sludge plant. Treatment consists of comminutors, hydrostatic
screens and a vortex grit system followed by aeration in a 2 million gallon
oxidation channel. Organic material in the wastewater is stabilized during this
part of the process.
Following aeration for 24 hours in the channel, the flow is
directed into two secondary clarifiers (sedimentation tanks) for separation of
the organic solids from the treated wastewater. In the secondary clarifiers,
solids are settled out by gravity and recycled to the oxidation channel, or
removed. The effluent is drawn from the top of the secondary clarifiers,
chlorinated and pumped to the Jacques Wetlands Marsh System.
The sludge that is removed is pumped to an aerobic digester.
Following digestion, the sludge is dewatered (concentrated) by Somat Dewatering
Screws and pumped to an Eweson Co-Composting digester to be mixed with
municipal solid waste. This 12 week process reduces 20 tons of material (14
tons of municipal solid waste plus 6 tons of sludge) to around 11 tons of
marketable compost. Since this co-composting facility became operational, it
has utilized 100% of the sludge from the wastewater treatment plant and 80% of
the residential solid waste produced by the Town of Pinetop-Lakeside.
For more information, please feel free to contact
the USDA Forest Service, Lakeside Ranger District at 928.368.5111 or you may
write us at 2022 W. White Mtn. Blvd., Pinetop-Lakeside, Arizona 85935
White Mountains Online wishes to express our
appreciation to USDA Forest Service, Lakeside District for providing this
information! This and other articles may be found in print media entitled:
Constructed Wetlands for Wastewater Treatment
and Wildlife Habitat
United States Environmental Protection Agency
#EPA832-R-93-005
September 1993
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