| 摘要 |
<p>906,370. Aerating sewage. NEDERLANDSE ORGANISATIE VOOR TOEGEPASTNATUURWETEN SCHAPPELIJK ONDERZOEK TEN BEHOEVE VAN DE VOLKSGEZONDHEID. June 28, 1960 [June 30, 1959], No. 22679/60. Class 111. An aeration rotor has a shaft 1 which may, for instance, be a hollow shaft or pipe and which has a length corresponding to the breadth of an aeration basin. Each pair of aeration elements consists of strips of sheet metal of about 5 cm breadth; three or four of such bent strips being combined into an aeration star themselves or with the aid of intermediate bridge members also having a similar crosssection. For carrying purposes, an iron rod 6 is spot-welded to the shaft and one of the bridging members is given a shape into which fits the rod 6. The stars are mounted on the shaft in an axially spaced series having interspaces of about 5 cm, so as to provide an aeration rotor having an array of plates similar to that of a cylinder brush. It is possible to stagger the plates of the several successive stars by arranging a second iron rod on the shaft at an angular distance of, for instance, 30 degrees relative to the first rod or by means of a recess (not shown).</p> |
