EFFECTS OF SUSPENDED SOLIDS CONCENTRATIONS
ON THE STRUCTURE OF TURBULENCE AND THE
OXYGEN TRANSFER MECHANISM IN
ACTIVATED SLUDGE
TOMONORI MATSUO
Department of Sanitary and Urban Engineering, Faculty of Engineering,
University of Tokyo, 7 - 3 - 1 , Hongo, Bunkyo-ku, Tokyo, Japan
Experiments were conducted to find to what extent turbulence plays a role in the
oxygen transfer mechanism of activated sludge and the effects of the hydro dynamical
conditions on the biological reactions. The concentration of the suspended solids was
considered as a useful parameter which characterizes the structure of turbulence.
TURBULENCE IN THE AERATION TANK
Two series of experiments were conducted. The first (series A) was to show if there
could be different structures of turbulence in the flow due to bubble aeration. The other
(series B) was to examine if any effects of suspended solids on the structure of the
turbulence were apparent.
Experimental Apparatus and Procedure
*
2φ
A3d
mh.
^ Γ ^ Ι
1
If
pzz
I
u^z zzzz 1
1
u
1
1?
1 — — H
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i
n
1
1
A
1
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I P J
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w 1
i _
Fig. 1.
Experimental Vessel of Series A, B and C
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