(Rapid mixing)

-

-

-

- (Mechanical devices)

- Hydraulic jump

- (Baffles)

-

-

(Turbine)

(Propeller)

(Paddle)

( : , )- Stators (Mixer)

Stators Hydraulic jump

- - ()

Hydraulic jump

( : , )

- Par shall flume

Par shall flume

-

-

-

( : , )

-

- 1

- (In-line blender), Orifice , Static mixer

Static mixer

( : , )-

1. (Velocity gradient) G

G= (s-1)

P= (lb.ft/s)

= (lb.s/ft2)

V= (ft3)

2. (T) =

1

T (s)203040>40

G (s-1)1,000900790700

( : , )- Stator 1 17,300 ../ 1.5 -

- 2

-

-

- - 2 15 /

( : , )-

- 2

( : , )

- 0.45 . - 0.15 0.45 ./

- 20 50

- ~1.5

0.6 .

- > 0.9 . ---- , < 0.9 . ----

- G 20 50 -1

- G = (12.83 x 106H/T)0.5

H=head loss (.)

T= ()

- Head loss 180

H = 0.163v2

v= (./)

2 1

- 4

- (Inlet zone)

- (Settling zone)

- (Sludge zone)

- (Outlet zone)

( : , )

-

-

- 0.15 0.9 m/s

0.5 2.0 /

( : , )

- (Sludge hopper)

-

( : , )

-

-

-

-

- (weir)

( : , )

-

4 1. (Discrete settling)2. (Flocculent settling)3. (Zone settling)4. (Compression settling)

( : , )- - = - - - (1)

100% = Vo- (V) ( Vo

- (V) ( Vo (2)

(3) B = h/ho V/Vo

t=

t=L/ ( / )

=ho/Vo ( / )

L/ = ho/Vo Vo=ho/t

t

Vo= ho /L

=Q/hoW ( / )

Vo=hoQ/LhoW = Q/WL

WL= = A

Vo=Q/A

Q/A (Surface loading rate, Surface overflow rate) A Q ( Q/A

Vo Q/A V/Vo-

50 m3/day.m2

- Dimension

L : W ( : ) = 3:1 5:1

W 2 8 . ()

L 30 .

D () 2 4 .

Slope () 1%

2 4 3 1 2 3 .

EMBED Equation.3

PAGE 12

_1245158164.unknown