Cost and Performance of Retention Basins
333
SEPARATE
DRY WEATHER
sanitary
FLOW
sewage
WET WEATHER
sanitary
FLOW
sewage
surface
|
runoff
COMBINED
DRY WEATHER
sanitary
FLOW
sewage
WET WEATHER combined
FLOW
sewage
SEWERAGE SYSTEM
9 0 0
270^
TOO"
30
490
L420
ψ
IST.P) *
/ 0 \ .
►
—
iST.RJ-frSEWERAGE SYSTEM
900
270^
' 1 *
870
270
Γ~3θΊ
590
450
(DEPOSITS
i ^
, 620
4SÖ
k
i >
w
j *
165
120
1250
4 9 0
| 380 1
220
455
330
^/^~\
Hs.TRy *
90
270
"TcTl
30
"49Ö1
JZO
125
490
N—rm * v ( SLUDGE )
x \
- < * Β ^ - *
J^\
.
w K^y
w
~76~1
110
17
120
LEGEND
1
1-SUSPENDED SOLIDS LOAD- LB/ACRE/YR
C^\
? S
W
5 ? L N T
1
1- WASTE WATER FLOW" 1000 GAL/ACRE/YR
K^J
PLANT
I
1-SUSPENDED SOLIDS IN DEPOSITS
Z^.
RETENTION
(
) OR SLUDGE LB/ACRE/YR
\ y
BASIN
Fig. 1.
Effect, on Suspended Solids Loadings, of a Retention Basin-Treatment Plant System
in Comparison with a Separate Sewerage System.
I
SEPARATE
DRY WEATHER
sanitary
FLOW
sewage
WET WEATHER
sanitary
FLOW
sewage
surface
|
runoff
COMBINED
DRY WEATHER
sanitary
FLOW
sewage
WET WEATHER combined
FLOW
sewage
SEWERAGE SYSTEM
1035
2 7 0
1 115 |
30
ΓβΊΠ
420
ς
1035
270
1 195
450
k
/ςτρ\ h
/C^S ^
IEWERAGE SYSTEM
^
\h (DEPOSITS)
i^ t
1027
270
203
450
^
*
i
W
i*
54
120
1
1139
4 9 0
112
1 22 Oj
149
330
N
ΠΓ"
1
104
270
~ΊΓ~
3Q 1
80
Ι_42θ|
1 14
490
* ι ( SLUDGE )
~ X T ^
fc/cxpN
^
-^■y-+
LEGEND
1
l-B.o.D.
1
l-WAST
1
I" BOD.
(
) SLUI
37
110
5
120
LOAD- LB/ACRE/YR
/ Q \
| ^ 5 Ε ΝΤ
Ξ WATER FLOW-1000 GAL/ACRE/YR
V _ / PLANT
IN DEPOSITS OR
/
ζ^
RETENTION
)GE L B/ACRE/YR
y
BASIN
Fig. 2.
Effect, on BOD Loadings, of a Retention Basin-Treatment Plant System
in Comparison with a Separate Sewerage System.