Aseptic Packaging (Drink boxes, soy-milk containers)
The square boxes used for liquids are called "Aseptics", the most common brand of which is "Tetra Pak". Aseptic packages are made with three materials. Paper comprises 70 percent of the package, polyethylene 24 percent and aluminum 6 percent.
Hydra-pulping is the only way to recycle Aseptics. It is like a huge blender that separates the paper from the plastic and aluminum, so that the high-quality paper fiber is recovered for recycling into other paper products. Sources say the actual hydra-pulping recycling process, unfortunately, is very expensive and awkward, and is therefore only available in a very few places. Because of the difficulties, only an insignificant fraction of aseptic packages are currently recycled. In San Francisco, Sunset Scavenger accepts and recycles Aseptics.
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