| http://www.w3.org/ns/prov#value | - An air pressure of 0.8 kg/cm.sup.2 G was then applied to the bundle of hollow fibers from both ends of said fibers, and waste water was subjected tobiological treatment while air (or oxygen) was fed from inside the hollow fibers.An artificial waste water was prepared which consisted mainly of glucose and had a COD cr of approximately 1,000 ppm and a pH of 7.0.
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