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10 Paul W. Donoho, R.E.H.S. #6227 (530) 701-9972 ° • - O&M COMMERCIAL About the AdvanTex Primary Tank Recirculation/Blend Tank The primary tank provides passive primary wastewater treatment.There The recirculation/blend tank reduces the strength of the effluent being can be one or more primary tanks in parallel or series,depending on applied to the AdvanTex filter.R is sized at So to 100%of the design flow. the size of the system.In certain applications,the primary tank may be It is located after the primary treatment tank and before the AdvanTex preceded by a grease interceptor tank. textile filter. The reduction in effluent strength is achieved by mixing treated filtrate from the AdvanTex filter with primary treated effluent at the recirc valve, located at the inlet of the recirculatioo/blend tank.A timer-controlled pump at the outlet end of the tank then sends the blended effluent to the AdvanTex filler. Seum AdvanTex®Textile Filter The AdvanTex textile filter pod provides secondary wastewater treatment. Clear There can be one or more AdvanTex pods,depending on the size of the system. The primary tank is an enclosed,watertight receptacle designed to collect wastewater;segregate settleable and floatable solids(sludge and scum);accumulate,consolidate,and store solids;digest organic matter;and discharge treated effluent.BUO(biochemical oxygen demand)removals of greater than 65%and TSS(total suspended solids)removals of greater than 70%are easily accomplished.In the primary tank,wastewater separates into three distinct layers:a floating The filter is a stur scum layer,a bottom sludge Payer,and a clear zone in between,which is sturdy,watertight fiberglass basin filled with an engineered relatively free of large solids.An eff€uent filter or pump vault allows liquid textile material.The textile media has a very large surface area and void effluent from the clear zone to be transported to the recirculation/blend volume(for free flow of oxygen).Wastewater percolates both through or recirculation/blend and anoxic tank. and between the textile media.A visible biological film normally develops on the filter media within a few days of system start-up.Within the filter, Anoxic Tank(if applicable) aembic conditions exist that are ideal for microbes that convert ammonia The anoxic(low oxygen)tank enhances the denitrification of AdvanTex® to nitrate(nitrification).BOD and TSS reductions occur almost immediately. filtrate.It is sized based on the design flow of the system.In systems that Nitrification may take four to six weeks,depending on ambient temperature. use an anoxic tank,ft is generally located between the primary tank,flow After percolating through the filter media,the effluent gravity-flaws to the splitter basin,and recirculation/blend tank in the treatment train. recirculating valve.On systems designed for enhanced nitrogen removal, The anoxic tank provides the ideal environment for carbonaceous the effluent first flows to a flow splitter basin where a percentage of the microbes that reduce nitrates to nitrogen gas(denitrification)from effluent is diverted to the inlet side of a primary tank or anoxic tank The AdvanTex filtrate returning from the flow splitter basin.The harmless remainder flows to the recirc valve,where It is directed either into the nitrogen gas is released freely back into the atmosphere, recirculation/blend tank or discharged. M1IN-ON-ATX ,Rev.2.1,05/15 •�Copyrighi Orenty Systems®,Inc•Pmperty of Orenco Systemsw,lnc�Do not raprotluee or di5tdbuie wpltout written authorization tram Orenco•800-348-9843