Page 15 - PDZA Sustainable Aquarium Brochure

That is not the case with drum screen filtration. As FIGURE 4—DRUM SCREEN
shown in Figure 4 we see there would typically be FILTRATION BUILDING GEOMETRY
a greater space requirement at higher elevations. In Figure 4, we see how drum screen filtration
has a high demand for space at upper elevations.
Upper Space: 2,260 sq ft Overall, for saltwater fish systems the alternative
drum screen filtration requires less space than
Lower Space: 800 sq ft
traditional sand media filtration with saltwater
Total LSS: 3,060 sq ft backwash recovery basins.

That’s because the water discharges “by gravity”
and filters are located above the exhibit tank in
this example. For the maximum savings in energy,
the exact installed elevation of the drum filters is
a very critical factor. Since more space is required
at higher elevations, the level of collaboration,
systems integration and coordination becomes
critically important. (Another alternative process
could be devised with the drum screen filters
located just below the exhibit tank water level with
pumping after the removal of large particulate.)

Figure 4—Drum Screen Filtration Building Geometry

CASE STUDY: THE PACIFIC SEAS AQUARIUM AT POINT DEFIANCE ZOO & AQUARIUM 15