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i <br /> � t <br /> Introduction <br /> Recycle % of Inf. 0-300% <br /> D.O. 1.0-3.5 <br /> Aerobic Digester: <br /> No. of units 2 units <br /> Digester capacity 5,000 gal <br /> Effluent Storage Pond capacity 3,000 gal <br /> Facility Description <br /> Unit processes: <br /> Trash Tank 1,000 gallons <br /> Equalization Tank 2 @ 1,000 2,000 gallons <br /> Influent Pumps 1.5 hp each <br /> Raptor Facility 6,000 gal/day <br /> Recirculation Pump 3 hp each <br /> Solids Handling 2 @ 2,500 5,000 gallons <br /> Effluent Pump 7.5 hp each' <br /> Disposal via Drywells (subsurface) 2.2 Acres <br /> Operating Description: <br /> Flow enters the pump station wet well where wastewater (influent) is <br /> pumped into the treatment plant. In the treatment process, wastewater <br /> undergoes secondary treatment by the trickling filter process. In the <br /> treatment plant wastewater first flows through the biotowers where <br /> dissolved and suspended solids are converted to settleable solids. This water <br /> then flows into the secondary clarifier. In the clarifier, sedimentation takes <br /> place and the sludge settles leaving clear water on top (effluent). This water <br /> is discharged into a holding pond. Treated water from the facility discharged <br /> into the pond is called secondary effluent. Settled sludge on the bottom of <br /> the clarifier is removed by a centrifugal pump to the aerated sludge holding <br /> tank/ aerobic digester. In the aerobic digester the liquid is called aerobic <br /> sludge. After digestion, sludge can be separated and disposed of properly. <br /> Here the sludge settles leaving clear water on top. When this water is <br /> removed it is termed decant. Removal of the sludge that has settled in the <br /> digester is by sludge removal Mucks. This sludge is called digested sludge. <br /> From the Raptor clarifier secondary effluent flows by gravity to the effluent <br /> holding pond Final Effluent. Final Effluent is discharged into the Drywell <br /> field on an intermittent basis. <br /> 7H Technical Services Group Operation &Maintenance Manual <br /> Introduction Page 5 of 26 <br /> 991215 <br />