The Pacific commercial advertiser. [volume] (Honolulu, Hawaiian Islands) 1856-1888, 1881-12-31
Ninety Per Cent. of juice from Cane

-
We find in tie London TIg.s Of Nov. 18th the
following highly interesting de-r 'ptiOB Of a>.sW
system Of sugar manufacture. hereby 90 per
cent! OF Juice is extracted 'ro, sugar cane.
BoNSEFIN's system OF 81, MANuTAcruRK.-
The production OF cheap sugar in the colonies IL
the cause OF considerable competition between the
manufacturers of beet root and cane sugars. and.
owing to certain defects in the ordinary system
OF cane sugar manufacture. the beet root makers
at present have the best OF il. IL would certainly
appear 10 be an anomaly that colonial sugar. in
It's already manufactured condition, should re-
quire to be remelted and boiled In England. The
natural course would be, If possible. to produce
white refined sugar on the spot where the cane 10
grown and at one operation, while the Juice IL
fresh and in the most favourable condition for
treatment. The defects referred 10 us existing in
the ordinary system are, in the FIRST place, that
not more than from 90 to 65 per cent. Of Juice 10
extracted from the cane by a single crushing out
OF the 90 per cent. il contains in the second
place, the comparative slowness Of the process
allows time for fermentation to Get up while. in
the thIrd, animal charcoal Is required rs a filter
ing medium, which involves both expense and
trouble. This matter has, for some years past,
had the careful attention OF Mr.. +. A. Bonnefu.
an old sugar grower of Mauritius, and no has sue
ceeded IN deVlslng a system of cane sugar manu-.
facture which appears to overcome all the above
objections, and promises to shorten the process Of
manufacture most materially. Mr.. Bonnefn docs
""oE WIN tut Cdne mil ana substitutes lOF 40
what he calls n - pulpefactor, - which consists
ot IA series Of vertical saws, which RAPIDLY cut the
bundles of canes into slices. The cut cane falls
INTO a dIsintegrator placed beneath the saw frame.
and IN which the cane is quickly reduced 70 a Cue
pup IL ls afterwards passed between n pair OF
rollers and the whole percentage Of the Juice ex-
tracted. The juice is then mixed, gallon by gal
ION. as 1t is produced. with a proper proportion
OF lime and passed over n continuous :. prenara.
tor. which consist ola long and broad table
having a corrugated or lurrowed surface. heat
being applied underneath. There are a series of
pockets at intervals in the corrugations and Gas
the juice flows along. the impurities held In SOS.
pension are deposited by gravity and become col.
iected In the pockets, or c~atchpiss, from whence
they are cleared out at intervals, The iuico
travels backwards and forwards for a long dis
taBce through the corrugations, finally arriving
at the outlet in a favourable condition, both as
regards quality and temperature, for filtration.
Ihls process is effected in a filter specially devised
by Mr.. Bonnefin, and which consists of a seriea
oil metal rings, covered with indiarubber~ and
placed horizontally in u press. Over each alter
nate rIng-the internal diameter of which IN
l2In.--ls hung a filter cloth made of pure unspun
cotton OF the finest fibre. The rings and cloths.
to the required number, which varies accordin9
10 the rate OF filtration desired, are closely pressed
ana he'd together by screws and the syrup 10
pumped into the press. Ii passes through the
whole series of rings and cloths, the solid i,npuri-
ties being intercepted and retained by that DOR.
ton OF each filter cloth which covers the onepino
IN the ring, while the syrup passes by cnpiIlnrS
through the surrounding portions Of
the cloths. and is delivered in a perfectly clear
and pure condition at the outlet. The pure mice
rs it leaves the filter press is conducted either 20
the ordinary vacuum pan or TO the more rapid
ma elective evaporation and concentrator DESIGN
I'd by Mr. Bonnefn. In the evaporator the iuice
IS rapidly deprived Of such water as il NAV con-
AIN, while in the concentrator IL ia as rauidlv
into the condition of sound sugar. All
.hese operations, from the time the cane is placed
u the pulpefactor to the moment when it Leaves
he concentration in the form of crystallized sugar.
t IS said. do not occupy more than one hour. as
IgaInst some six to II hours with the ordinary
'rocess and its attendant drawbacks. Ia short.
lr. Bonnefn claims to extract the whole Of the
accharine matter from the cane, to prevent fer
to thoroughly clear the syrup of all
uspended matters ready for filtration, TO com
,letely purify the juice by filtration, and 10 make .
iirect from the cane only pure white refined
ugar. A successful demonstration OF the cara
,IIitIes OF one portion Of the apparatus-nameIy.
nc inter press, was recently given by Mr.. Bonnie
at the New Sun Works, Burdett-road. Bow.
M the whole process Of manufacture explained
y the working drawings of a set Of machinery
ow on order. A number of sugar manufacturers
present.