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C�kDVANTEX_ O&W, <br /> a11ANUAL <br /> Treatment Process and Performance <br /> Expectations: Processing Tank <br /> one of two ways: to the back of the tank in <br /> Mode 1 and to the front of the tank in Mode 3. <br /> Z, This plumbing configuration affects effluent <br /> quality.Effluent quality is also contingent upon <br /> a number of other conditions inside the tank: <br /> •strength and characteristics of incoming <br /> waste(see"Raw Influent,"below) <br /> 0 average flows within design range (typically <br /> 40-60 gallons per person per day) <br /> •adequate long-term solids retention for <br /> thorough digestion <br /> •watertightness of tank(for proper stratification <br /> of incoming waste) <br /> •proper size of tank(ior minimum 24-hour ' <br /> I hydraulic retention time through the tank's <br /> Processing Tank cleat'zoneat average flow rates and when <br /> ri <br /> sludge and scum are developed fully) <br /> The processing tank provides primary wastewater <br /> ! treatment.The tank is an enclosed,watertight If the above conditions are met,you can expect <br /> receptacle designed to collect wastewater;segre- the following treatment performance from the <br /> gate settleable and floatable solids (sludge and processing tank: <br /> scum);accumulate,consolidate, and store solids; <br /> Expectations: <br /> ' <br /> digest organic matter;and discharge treated Performance ExpF <br /> effluent. BOD (biochemical oxygen demand) Processing Tank <br /> removals of greater than 65%and TSS (total BODS TSS TH <br /> suspended solids) removals of greater than 70% mg/L mg/L mg/L <br /> are easily accomplished. Raw Udluenr 450 500 70 <br /> The tank operates as a plug-flow type of reactor septic Tank <br /> Screened Effluent 130 30 68 <br /> (fluid and particles enter and exit the tank in pro- ___________________________ <br /> gressive sequence).Wastewater separates into three Processing Tank <br /> Recirc/Blend Eff.-Mode i" 20 20 30 <br /> distinct layers:a floating scum layer,a bottom _______________ _____.. <br /> sludge layer,and a clear zone in between,which is Processing Tank <br /> relatively free of large solids.A pump vault withRecirc/Blend-------------------Eff-------.-Mode----------3`"-----30--------------•20......__-- -I5 <br /> -- <br /> effluent filter located at the outlet end of the tank *Source:Crites d-2 ehobanoglous. Small a d <br /> draws liquid effluent From the clear zone,and the DecQzrrahzed Wastewater ana cment S stems <br /> filtered effluent is dosed to the next step in the P. 183, 1998.McGraw-HdL <br /> treatment process. . . the AdvanTex—Textile <br /> Filter. **Will vary with redre ratios. The numbers here Am <br /> represent a typical 5:1 recirc ratio. <br /> Because the AdvanTex—Treatment System oper- <br /> ates in the recirculating mode, the filtrate from <br /> the Textile Filter returns to the processing tank in <br /> a <br />