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ADVANTEX* O&M MANUAL, Treatment Process/Performance Expectations (continued) acclimation period for nitrification may range from four to eight weeks,or longer in colder climates. AdvanTeis filtrate effluentquality is dependent upon proper management of the recirc/blend ♦ effluent flowing into the filter(which,in turn, I . l is dependent on the conditions described on the previous page).If proper conditions are met,and with typical average daily flows of 40-60 gallons per capita per day,you can expect the following AdvenTex® Textile Filter treatment performance: The AdvanTexm textile filter provides secondary Performance Expectations wastewater treatment.The filter is a sturdy, Boo. TO TM watertight fiberglass basin filled with an engi- mg/L mg/L mg/L neered textile material.This lightweight,highly Raw Influent` 450 500 70 absorbent textile material treats a tremendous ------------------------------------------------------------------------- Primary Chamber amount of wastewater in a Small space. Effluent 150 40 65 The AdvanTee filter operates in the recirculating processing Tank mode,just like a recirculating sand or gravel fil- Recire/Blend Effluents 15.40 laza —4 ter,but loading rates are typically 5-20 times AXN Fltra = s s -4 higher,for a number of reasons.For one thing, --------------------------------------•- ------------------------------- the textile media has a very large surface area 1 Source:Crites&Tchobanogious.,Small and about 5 times greater than that of an equivalent Decentralized Wastewater Manages Svrunu volume of sand.Textile also has a greater void p. 180, 183, 1998.McGraw-Hill Based on volume(for free-flow of oxygen)and greater 50 gperl water-holding capacity. 1 Will vary with recirr ratios and mode configuration. The numbers here represent a rreirc ratio between 2:1 Wastewater percolates both through and between and 4:1 and are derived from Orenco and third- the textile media.A visible biological film nor- party testing in Mode 1. mally develops on the filter medium within a few 3 Actual performance results, based on a six-month days.BOD,and TSS reductions occur almost accumulative average from NSF(National immediately. Sanitation Foundation)testing on theAX20Nat 500 gpd ruing composite sampling. See p. 17 for Within the filter,aerobic conditions exist that additional information on treatment performance. are ideal for microbes that convert ammonia to Performance and servicing frrqumcies will tend to nitrate(nitrification).Other conditions exist,too, vary relative to the mass load being treated that result in further nitrogen reduction within Procedures for treating excessively bigh loads will the media. Some AdvanTexm filters are configured require engineering reviews For more information, (Mode 3)so that the filtrate recirculates back to please review AldvanTex°Design Criter= the high-carbon,low-oxygen environment at the 4 Dependant on treatment rystem configuration and inlet end of the processing tank,which is ideal recirc ratios. for microbes that reduce nitrates to nitrogen gas (denitrification). Harmless nitrogen gas is then released freely back into the atmosphere.The