SUGAR-CANE JUICE CLARIFICATION. 5 
Experiment 5. 
Filtering mater'al: From Lompoc, Calif. 
Amount of filtering material used : 11 pounds to 200 gallons of juice. 
Result: 1,150 gallons were filtered. The total time of nitration was between 
3 and 4 hours, the pressure never rising above 50 pounds. A firm press cake 
was formed, completely filling the frames. 
Experiment 6. 
Filtering material : Infusorial earth from State of Washington. 
Amount of filtering material used: 11 pounds to 200 gallons of juice. 
Result : 800 gallons ran through rapidly and clearly with a pressure of not over 
40 pounds. On attempting to filter more, the pressure ran up rapidly. The 
press cake was firm, but the frames were filled only three-fourths of the way 
to the top. 
An outline of these experiments is given in Tables 1 and 2. 
Table 1. — Filtration of sugar-cane juice with infusorial earth. 
WHOLE MILL JUICE. 
Experi- 
ment 
No. 
Juice 
filtered. 
Source of in- 
fusorial earth. 
Amount 
used. 
Maxi- 
mum 
pressure. 
Time of fil- 
tration. 
Remarks. 
3 
Gallons. 
1,000 
1,200 
1,000 
1,100 
1,200 
1,000 
1,100 
1,100 
1,150 
800 
Lompoc, Calif. . 
do 
do 
Pounds. 
60 
60 
60 
70 
72 
60 
60 
64 
64 
44 
Pounds. 
60 
60 
50 
50 
60 
40 
60 
50 
50 
High. 
Firm press cake formed; clear fil- 
trate. 
Very firm press cake formed; clear 
filtrate. 
Very firm press cake; filtration 
rapid and smooth. 
Press cake slightly soft at top. 
Very hard press cake; filtration 
very slow toward the end. 
Filtration rapid; filtrate clear and 
cake firm. 
Good filtration in all respects. 
Press cake very firm; filtrate clear. 
Filtration satisfactory in all re- 
spects. 
5 
8 
3 hours, 25 
minutes. 
2 hours 
9 
do 
do 
10 
12 
do 
15 
21 
22 
do 
do... 
do 
State of Wash- 
ington. 
3 hours, 14 
minutes. 
4 hours, 15 
minutes. 
24 
press cake; tops of cloths coated 
with slimy material. 
CRUSHER JUICE. 
1,350 
1,000 
1,000 
1,065 
500 
Lompoc, Calif. 
State of Wash- 
ington. 
Lompoc, Calif. 
do 
Maryland 
High. 
Firm press cake; clear filtrate. 
Very firm press cake; clear filtrate. 
Satisfactory filtration in allrespects. 
Do. 
Unsatisfactory. 
Table 2.- 
—Washing of infusorial earth press cake. 
Experiment No. 
Weight 
of press 
cake. 
Sucrose 
in press 
cake. 
Amount 
of wash 
water. 
Sucrose 
in washed 
cake. 
Remarks. 
3 
Pounds. 
252 
Percent. 
6.4 
Gallons. 
Per cent. 
These experiments in washing 
8 
200 
50 
25 
100 
80 
0.0 
1.2 
4.0 
.8 
1.0 
9 
252 
6.2 
pcriments of same number as 
described in Table 1. 
11 
15 
300 
6.5 
22 
