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Advanced Technology Waste Water Disposal Systems: AdvantexTM The AdvantexTM system is the latest alternative onsite wastewater treatment technology to be introduced in the Municipality of Anchorage.  The AdvantexTM system was developed by Orenco Systems, Inc.  It is a modified version of a technology referred to as Recirculating Trickling Filtration (RTF) It was first introduced into the Anchorage area in July of 1996.  The AdvantexTM system, is a biological treatment process in which the microorganisms eat the soluble and suspended organic material in the wastewater. This results in an effluent (the water that is discharged from the treatment system) that is non-biomat forming. In other words, the wastewater is treated to such an extent that it will not cause a progressive failure of the drainfield. This allows for the drainfield to be dramatically reduced in size versus what would be required utilizing conventional septic system technology.  The AdvantexTM process is summarized as follow: Wastewater from the house is first passed though a septic tank where the settleable solids and scum are trapped/contained. The "clear" liquid from the septic tank (which still contains soluble organic matter and suspended solids that would not settle in the septic tank) then flows into a pump chamber (second compartment of the septic tank) from which it is periodically discharged (about 1 minute every 20 minutes) to the trickling filter (see the photograph). The trickling filter provides an oxygenated environment in which microorganisms can grow on the geotextile material that is suspended in the filter housing. The attached microorganisms consume the organic contaminants as it is periodically sprayed over the media. The treated water that flows from the media is then returned to the pump chamber. When the liquid level in the pump chamber reaches a specific depth, the effluent is pumped to the drainfield for final disposal. [To Return to On-site Main Page]

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