19
EXPERIMENT III.
Mechanical Filters.
Date and hour of series
collection.
Description of
sample.
Jewell filter.
Paterson filter.
Remarks on each series.
T o t a l c o l o n i e s p e r c . c . o n a g a r a t 3 7 º c .
L a c t o s e f e r m e n t e r s p r e s e n t i n h o w m a n y c . c . ?
T o t a l c o l o n i e s p e r c . c . o n a g a r a t 3 7 º C .
L a c t o s e f e r m e n t e r s p r e s e n t i n h o w m a n y c . c . ?
19th Nov. 1919.
I
series 6 ...
8 a.m. ... Coagulating tank.
1,000
1 c.c.
7,200
1 c.c. Alum = 21/2 grains per gallon.
Do. ... Filtered water ...
500
1 c.c.
2,000 5 c.c. River water:—
8-30 a.m.
Do.
...
400
1 c.c.
300 5 c.c.
Total count—15,000.
9 a m. ...
Do
...
200
1 c.c.
260
5 c.c. L. F. = 0 01 c.c.
10 a.m. ...
Do. ...
400
1 c.c.
400
5 c.c. Rate of filtration = 100
12 noon ...
4 p.m. ...
Do.
...
Coagulating tank.
600
1,250
1 c.c.
1 c.c.
220
2,400
10 c.c.
1 c c.
gals. per sq. ft. per hour.
Alkalinity of river water—
Do. ... Filtered water ...
220
5 c.c.
180 20 c.c.
13.9 parts per 100,000.
22nd Nov. 1919.
River water 18,600—0.01 c.c.
II series ...
8 a.m. ... Coagulating tank.
3,100 0.1 c.c.
2,700 0.1 c.c.
Do. ... Filtered water ...
850
1 c.c.
930 0.1 c.c.
8-30 a.m.
Do.
...
610
1 c.c.
350
5 c c. Alum = 31/2 grains per gallon.
9 a.m. ...
Do.
...
590
1 c.c.
280
5 c.c.
10 a.m. ...
Do.
...
500
1 c c.
310
5 c.c. Rate of filtration was 100
12 noon ...
Do.
...
480
1 c.c.
250
5 c.c.
gallons per sq. ft. per hour.
4 p.m. ... Coagulating tank.
1,980
1 c.c.
2,500 0.1 c.c. Alkalinity of river water—
Do. ... Filtered water ...
510
1 c.c.
340 5 c.c
17.6 partsper 100,000.
27th Nov. 1919.
River water 27,000—0.01 c.c.
III series ...
8 a.m. ... Coagulating tank.
1,900
1 c.c.
1,800
1 c.c.
Do ... Filtered water ...
630 1 c.c.
250
5 c.c. Alum = 31/2 grains per gallon.
8-30 a.m.
Do.
...
535
5 c.c.
390 10 c.c.
9 a.m. ...
Do.
...
520
5 c.c.
240 15 c.c. Rate of filtration was 100
10 a.m. ...
Do.
...
540
5 c.c.
560
5 c.c.
gallons per sq. ft. per hour.
12 Noon... Do.
...
590
5 c.c.
810
5 c.c.
4 p.m. ... Coagulating tank.
4,500
1 c.c.
3,400
1 c.c. Alkalinity of river water
—
Do. ... Filtered water ...
560
5 c.c.
940
5 c.c.
19.8 parts per 100,000.
29th Nov. 1919
River water 19,000—0.01 c.c.
IV series...
8 a.m. ... Coagulating tank.
1,500 0.1 c.c.
1,800
1 c.c.
Do. ... Filtered water ...
520
1 c.c.
420
5 c.c.
8-30 a.m.
Do.
...
170
1 c.c.
310
5 c.c. Alum = 21/2 grains at inlet
9 a.m. ...
Do.
... 1,1.00
1 c.c.
570
5 c.c.
and 1 grain at outlet.
10 a.m. ...
Do.
...
870
1 c.c.
490
5 c.c. Rate—100 gallons per sq. ft.
12 noon ...
Do.
...
990
1 c.c.
310 1 c.c.
per hour.
4 p.m. ... Coagulating tank.
2,600 0.1 c c.
3,600
1 c.c. Alkalinity of river water—
Do. ... Filtered water ...
370 1 c.c.
630 20 c.c.
12.2 parts per 100,000.
3rd Dec. 1919.
River water 29,000—0.01 c.c.
V series ...
8 a.m. ... Coagulating tank.
2,100 0.1 c.c.
3,900 0.1. c.c.
Do. ... Filtered water ...
650
1 c.c.
540
1 c.c.
8-30 a.m.
Do.
...
680
1 c.c.
600
1 c.c. Alum = 31/2 grains per gallon.
9 a.m. ...
Do.
...
720
1 c.c.
580
1 c.c. Rate—100 gallons per sq. ft.
10 a.m. ...
Do.
520
1 c.c.
610
1 c.c.
per hour.
12 noon...
Do.
...
300
5 c.c.
440
5 c.c.
4 p.m. .. Coagulating tank.
1,400
1 c.c.
1,100
1 c.c. Alkalinity of river water
—
Do. ... Filtered water ..
320
5 c.c.
280
5 c.c.
9.4 parts per 100,000.
VI Seri es Dec. 1919.
River water 16,800—0.01 c.c.
8 a.m. ... Coagulating tank.
3,200 0.1 c.c.
3,600 0.1 c.c.
Do. ... Filtered. water ...
800
1 c.c.
620
1 c.c.
8-30 a.m.
Do.
...
460
5 c.c.
710
1 c.c. Alum = 31/2 grains.
9 a.m. ...
Do.
270
5 c.c.
270 5 c.c. Rate—100 gallons.
10 a.m. ...
Do.
...
430
5 c.c
380
5 c.c. Alkalinity of river water
—
12 noon...
Do.
...
310
5 c.c.
390
5 c.c.
16.8 parts per 100,000.
4 p.m. ...
Do.
300
5 c.c.
260
5 c.c.
7 p.m.
Do.
...
100 10 c.c.
250 10 c.c.
12th Dec.
1919.
River water 15,000...0.01 c.c.
8 a.m. ... Coagulating tank.
2,300 0.1 c.c.
2,100
1 c.c.
Do. ... Filtered water ...
630
1 c.c.
640
5 c.c. Alkalinity of river water—.
8-30 a.m.
Do.
...
690
1 c.c.
760 5 c.c.
18 parts per 100,000.
9 a.m. ...
Do.
...
240
5 c.c.
380 5 c.c.
10 a.m. ...
Do.
...
290
5 c.c.
310
5 c.c.
12 noon...
Do.
...
330 5 c.c.
390 5 c,c. Continuous flow through
4 p.m. ...
Do.
...
320 5 c.c.
260 5 c.c.
coagulating tanks for three
7 p.m. ...
Do.
...
120 10 c.c.
320
5 c.c.
working periods.