The Hawaiian gazette. [volume] (Honolulu [Oahu, Hawaii]) 1865-1918, 1901-11-22
G, T.. ECEART,
j. +. COOKE,
W. NJ. GIFFARD,
AUG. AHRENS.

The report on manufacture is as fol-
lows:
To the President. Trustees ana Members
of the Hawaiian Sugar Planters AS
ISOLATION:
Gcntlemcn:--Your committo" on sugar
, manufacture submits the following re-
port
In modern fact ries nine roller mills
provided with Erajewsky c-ushcrs or
other equally efficient apparatus for pre-
pairing the cane, are now being adopted.
! II is well known that different vari-
cites of cane vary in milling qualities,
some parting with their juices more
readily than others and there is often
a great difference in the fiber and sugar
contents from tields-especially If the
| land is rolling-where the same variety
| If cane is grown.
| 1t is usually considered that with mills
as described, good extraction approx
mates 90 per cent of the total sugar in
the cane. For the purpose of comparing
the influence of the fiber and sucrose
content of the cane on the extraction,
and assuming that the analysis of the
bagaSSe, In all cases, is as follows: Su-
crosse per cent, fiber &c per cent, the fol-
lowing table has been prepared:
sucrose in cane Fiber in cane.
10 II IL 10
per per per per
cent. cent. cent. cent.
, 1s per cent Extr'n 1926 92.56 9l.S7 81 Is
, Ii per cent. Extr'n. $3.50 92.0G 9l.33 $3.50
II per cent, Extr'n. lbs 9l.50 900 s9.1S
! 10 per cent, Extr'n. .9l.69 so.A 5000 S9.l5
! The difference of the increased fiber
content in the cane will be found in ac-
tual practice to have a greater effect in
preventing the extraction of the juice
, than that given in the above table.
| sin Louisiana, the difference between
, 10 per cent and j. per cent of fiber in the
cane reduces its value per cent from
an extraction point of view
'La. Planter, Nov. "a. 1900.
| 1t will be apparent that a mil grinding
cane containing IL per cent sugar and
Is per cent fiber. and obtaining an eX-
traction Of Ss.l5 per cent, will be doing
better work than mill grinding cane OF
l6 per cent sugar and 10 per cent fiber
and obtaining an extraction of 1926 per
cent
Maceration.-The advantages of mace
ration in the extraction of sugar from
the cane are now recognized in all sugar
cane countries. but this system is not
yet used to such an extent in these ISL
ands as ut the Colonial Sugar Refinery
Company's estates in Fiji and Queens
land.
| In all cases where the Juice approx
mates purity of 90 per cent a dilutior
of from 10 to IL per cent may be used &c
advantage, and If the sucrose content OF
the cane is high, a dilution of from q
to % per cent will be found profitable
provided the bagasse furnishes sufficient
fuel for the requirements of the factory
If water not exceeding Il temperature OF
1fj T.. he used, the greater part of the
impurities extracted by the macera tior
water win be removed In clarifying
Difusion.-The diffusion process is not
popular as a means of extracting sugar
from cane, on account of the cosSDoi
fuel. and also because the long eXposur,
of the cane to water of high temperatur,
extracts more than by the milling proc,
ess, of the pectinous tgums) and nitro
genous substances (amds), which can.
not be removed by the ordinary proc
esses of Identification, and consequently
interfere with the recovery of the sugar
this is more noticeable in canes having
juices Of low purity.
Clarification.-The Deming system /!
now most in favor with planters making
sugar for reiineries. Mr.. Prinsen Geer
ligs of Java says of experimenting
From a chemical point of view super
heat Qualification stands in no respects
behind the usual DELEGATION process
whilst its mechanical advantages ar,
many"
EvaporatiOn.-The concentration of tn
clarified and settled or filtered juc,
should be performed "a rapidly as posi-
BILE, ana this Is now accomplished II
modern factories by means of the Lilli
Evapurators.
Filtraiion.-As much OF the impuritie
are precipitated in concentrating III,
juice, filtering the syrup. particularly 1
, the juice has been superheated, would b.
, of advantage as IL would remove man!
of these impurities.