KING INSTITUTE, GUINDY, FOR 1927-28
45
TABLE II.— Analyses of Septic Tank effluents, Engineering College- cont.
Period I— July to October 1926— cont.
Time of stay of sewage in the tanks-24 hours-cont.
N u m b e r .
Source.
Date.
Ammonia-
cal
nitrogen.
Albumi-
noid
nitrogen.
Oxygen
absorbed
in 4 hours.
Resnlts are expressed in parts per 100,000— c o n t .
.
1926
23 Open tank
... ...
... 15th September ...
..
1.01
0.17
1 . 4 4
Closed tank
...
..
...
Do.
...
. .
0.82
0.12
1 . 5 0
24 Open tan k
...
... 16th September ...
1 . 0 4
0 . 2 1 1.16
Closed tank
...
...
..
Do.
. . . .
. . .
0.90
0.18
1 . 3 4
25 Open tank
...
...
17th September
. . .
.
0.88
0.15
1.26
Closed tank
...
...
...
Do.
.. ...
0.84
0.13
1.23
26 Open tark
... ...
.. 21st September ...
...
0 73
0.17
1 12
Closed tank
...
... ..
Do.
...
.
0 . 6 6
0.13
1 . 2 2
2 7
Open tank
...
...
... 22nd September ...
. . .
0.52
0.18
1.00
CClosed tank
...
..
Do.
... ...
0 . 5 2
0.17
0.82
28 Open tank
... ...
23rd September .
...
0.73
0.15
0.96
Closed tank
..
...
..
Do.
...
. . .
0.53
0.11
0.96
29 Open tank
..
...
... 24th September ... ...
0 . 7 8
0.13
1 . 0 7
Closed tank
...
...
...
Do.
. . .
. . .
0.42
0.08
0.83
30 Open
Open tank
...
...
.. 28th September .
...
0.66
0.12
...
Closed tank
...
.. ...
Do.
...
. . .
0.53
0.10
. . .
31
Open tank
..
...
... 29th September .
...
0.80
0 . 0 8 0.73
Closed tank
... ..
...
Do.
...
. . .
0.44
0.06
0.71
32
.
...
...
Open r tank ..
30th September
...
0.62
0.10
. . .
Closed tank
...
...
.
...
Do.
. . . . .
0.52
0.08
. . .
AVERAGE..
Open tank
... ...
...
. . . . . .
0.91
0.18
1 . 2 9
Closed tank
...
...
...
. . . . . .
0.79
0.16
1 . 2 7
Period II-October to December 1926.
Time of stay of sewage in the tanks- 18 hours.
1
Open tank
...
...
...
1926.
0.44
0.08
...
1st October ...
...
...
0.58
Closed tank
...
... ...
Do.
...
... ...
0.13
. . .
0 .70
0.88
0.08
2 Open tank ... ...
4th October ..
...
...
.
0.70
0.09
1 08
. •
Closed tank .
...
..•
...
Do.
...
...
. . .
0.12
0.92
1 . 3 0
3
Open tank
... ...
... 5th October ...
...
...
0.12
1 . 1 7
Closed tank
...
.
Do.
Do.
...
. . .
0.80
4 Open tank
...
.. ... 7th October ... ... ...
0.91
0.19
1.31
1.01
0.18
Closed tank
.. ...
...
Do.
...
...
. . .
1.33
1.05
0.11
5 Open tank
...
.. .
... 8th October ..
...
...
. 1 4 4
1.01
0.09
Closed tank
...
... ...
Do.
...
.....
1.56
0.88
6 Open tank
...
... 11th October
...
...
0.13
1 . 6 7
0.84
0 1 0
Closed tank
.. ...
...
Do.
.
. . .
1 50
0.95
0.16
7 Open tank
....
... 12th October
...
.
1.45
0.10
Closed tank
...
...
Do.
....
. . .
0.72
1.30
8 Open tank
...
... ... 13th October
1.01
0.14
1 . 6 7
0.96
0.12
1.61
Closed tank
4 ..
...
Do.
...
...
0 92
0.14
1 . 4 0
9 Open tank
... 14th October
.. ...
1.20
0.10
1 . 3 6
Closed tank
... ... .,
Do.
...
. . .
0.80
0.24
1 . 4 1
10 Open tank
... ...
... 19th October
0.84
0.20
Closed tank
...
...
...
Do.
...
...
1 . 2 4
11
Open tank
.... .....
20th October
...
...
0.80
0.12
0.94
0.09
0.75
1 . 0 6
Closed tank
.
...
... ...
Do.
...
...
0 80
0.24
12 Open tank
... ...
21st October
....
•
1 . 3 0
0.86
0.12
Closed tank
...
...
,..
Do.
. .
. .
. . .
1 . 1 6
0.80
0.12
13 Open tank
... ...
... 22nd October
...
..
...
0.70
0.12
Cloned tank
..
.. ...
Do.
...
..
. . . . . .
0.75
0.12
1 . 2 0
14 Open tank
...
...
... 26th October
..
....
1.07
0 70
0 15
Closed tank
...
...
...
Do.
...
15
Open tank
.......
... 27th October
...
...
0.67
0.16
. . .
Closed tank
,..
..
...
Do.
...
....
0.56
0.17
...
16
.
Open tank
.
...
. 28th October
...
...
0.50
0.11
. . .
0.08
05.1
Closed tank
...
...
Do.
...
.. .
...
17 Open tank
. ..
...
..
29th October
...
. . .
0.38
0.13
. . .
0.10
0.42
Closed tank
...
...
. ..
Do.
. . .
. . .
017
0.46
8
Open tank
... ...
... 2nd November
... ...
. . .
0.16
0.55
Closed tank
...
..
...
Do.
... .
. . .
. . .
0.34
0.10
0.45
9
Open tank
... ..
... 5th November
...
. . .
0.22
0.10
0.88
Closed tank
...
...
...
Do.
. . . . . .