Wastewater components
Analysis /matter
Symbol
Unit
Wastewater type
Concentrated
Moderate
Diluted
Very diluted
Suspended solids
Xss
gSS/m 3
450
300
190
120
Suspended solids,
Xvss
gVSS/m 3
320
210
140
80
volatile
Precipitate after 2h
Xss
ml/1
10
7
4
3
Precipitate after 2h,
Xss
g/m3
320
210
140
80
suspended solids
Precipitate suspended
Xvss
g/m'
220
150
90
60
solids, volatile
Suspended solids after
gSS/m 3
130
90
50
40
2h
Coliform bacteria
No./m 3
1012
1012
1012
1012
Absolute viscosity
J.la
kg/(m· s)
0.001
0.001
0.001
0.001
Surface tension
dyn/cm 2
50
55
60
65
Conductivity
mS/m 1 )
120
100
80
70
pH
-
7-8
7-8
7-8
7-8
Alkalinity
TAL
eqv/m 32 )
3-7
3-7
3-7
3-7
Sulphide 3 )
gS/m 3
0.100
0.100
0.100
0.100
Cyanide
CcN
g/m'
0.050
O.D35
0.020
0.015
Chloride 4 )
g Cl/m 3
500
360
280
200
Boron
gB/m 3
1.0
0.7
0.4
0.3
Temperature, summerS)
"C
20
18
15
15
Temperature, winter S)
"C
8
8
8
8
I) mS/m = 10 J.!S/cm =1m mho/m
2 ) 1 eqv/m 3 =1m eqv/1 =50 mg CaCOJ/1
J) H2S + HS- + s-4 ) with 100 gCI/m 3 in the water supply
S)Denmark
Table 1.10
Different parameters in domestic wastewater. Data for example from I 17 I.
Table 1.11. gives an idea of the concentration of microorganisms in raw and biologically treated domestic wastewater.
Raw sewage
Bioi. treated
E.Coli
10 7
10 4
CJ.perfringens
10 4
3·10 2
Fecal streptococcae
10 7
10 4
Salmonella
200
1
Campylobacter
5·10 4
5•10 2
Listeria
5·10 3
50
Spaphyllococus aureus
5·10 4
5•10 2
Coliphages
10 5
103
Giardia
103
20
Roundworms
10
0.1
Enterovirus
5000
500
Rota virus
50
5
Susp. matter (mg/100 mi)
30
2
Table 1.11
Microorganisms in wastewater(# /100 ml)
30