AccuPac® Mixed Media is the optimal configuration of PVC structured sheet media in biotowers for superior wastewater treatment. The Mixed Media concept combines the superior distribution properties of crossflow media with the reduced potential for clogging of vertical flow media, to give consistent and efficient biological wastewater treatment. Mixed Media is ideal for use in the modern trickling filter that is designed for 16 feet or more of media depth. This configuration improves the mixing, hydraulics, surface area, ventilation, and physical strength of the media beyond that of either crossflow or vertical flow media alone.
| Benefits of Mixed Media | ||||
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• Excellent distribution of wastewater over the surface of the filter due to the crossflow media in the top two layers. • Additional structural integrity due to the use of vertical flow media. |
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• Reduced potential for excessive biomass buildup due to increased shearing in vertical layers. • Thinner biofilm improves substrate removal efficiency of both carbonaceous and nitrogenous BOD. |
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• High oxygen transfer in the upper crossflow media where aerobic conditions are very important to BOD oxidation. |
 Cross Flow Media |
Brentwood Media
Modules All Brentwood trickling filter media modules are fabricated from rigid PVC sheets. The material is resistant to rot, fungi, bacteria, acids, and alkalis commonly found in wastewater. UV protection is added to the top layer of filter media which may have extended exposure to sunlight.
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 Vertical Flow Media |
BOD Removal (minimum surface area: 30 ft2/ft3)
Top Two Layers: CFS-3000 Cross Flow Media
Lower Layers: VF-5000 Vertical Flow Media
Nitrification (minimum surface area:
40 ft2/ft3)
Top Two Layers: CF-1900 Cross Flow Media
Lower Layers: VF-3800 Vertical Flow Media
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