CANE SUGAR. 



being conducted in the manner prescribed in the Naudet patent. After the 

 withdrawal of the charge of juice, the megass remaining in the cell passes 

 through the usual process of exhaustion in the diffusion battery ; when finally 

 exhausted it is discharged and passed through a mill for use as fuel. 



Comallonga 6 gives details of the installation and results obtained at San 

 Jose in Cuba. The cane worked up was 1 000 tons per 24 hours ; there were 

 10 diffusers of a capacity of 70 hectolitres (246 cubic feet) each; there were 

 three cells always out of circuit, filling or emptying, so that the megass went 

 through a seven-fold diffusion ; per 1 00 kilos of cane, the charge of juice 

 withdrawn was 92- 93 litres ; the temperature maintained in the battery was 

 95-100 C. 



With canes, containing 13'06per cent, of sugar, the loss in megass was '89 

 per 100 cane, corresponding to an extraction of 93' 19 per cent. 



In the Naudet process, the juice passes directly from the diffusion battery 

 to the evaporators, the liming being done in the battery, and owing to the 

 filtration of the juice through the megass, the clarifiers and filter presses are 

 dispensed with ; notwithstanding this, Comallonga states that, owing to the 

 extra number of hands required at the battery, the process does not show any 

 saving in labour. 



At the time of writing (1910) the Naudet process not only does not 

 extend, but some factories that had adopted it have reverted to multiple 

 milling, and figures supplied to the writer do not show any superiority to those 

 obtained from an average nine-roller mill. 



In justice to this process, it should however be mentioned that the 

 inventor claims that in at least one case where the process was abandoned 

 the failure was due to incompetence and to the alteration of his original 

 designs ; in Madeira, where the process was first applied to the cane, a continued 

 success is claimed. 



GeerligS-Hamakers Process 7 . In 1 903, Geerligs and Hamakers 

 demonstrated by large scale experiments in Java, that by diffusing megass 

 from a six-roller mill and crusher, an extraction of 98 per cent, vas obtainable 

 with a dilation of 19*6 per cent, on normal juice. This scheme has not been 

 adopted, but in the writer's opinion, this process, or one based on similar 

 grounds, is the only one likely to supersede multiple milling as a means 

 of sugar extraction from canes. 



REFERENCES IN CHAPTER XI I. 



1. Spencer's Handbook for Sugar Manufacturers. 



2. Overseer's Manual. 



3. S. C., 199. 



4. /. 8. J., 45. 



5. S. (7., 346. 



6. Bull, de Soc. Agric,. Cuba, iii. 2. 



7. /. S. J., 60. 



240 



