THE ALCOHOL INDUSTRY. PART I. 



135 



Table XII. — Analyses of tuba entering the still a>M icaste in control test No. 2, 

 at the San Esteban distillery. 



Time. 



Fermented tuba. 



Waste. 



Tem- 

 per- 

 ature. 



Den- 

 sity. 



Acid- 

 ity, cc. 

 0.1 N. 



Polari- 

 za- 

 tion. 



Per cent 

 alcohol 

 by vol- 

 ume. 



Den- 

 sity. 



Tem- 

 per- 

 ature. 



Acid- 

 ity, cc. 

 0.1 N. 



Alcohol. 



10.30 a. m 



11.30 a. m 



12. 30 a. m 



1.30 p. m 



°C. 

 25 

 25 

 25 

 25 

 25 

 25 

 25 



1. 0024 

 1.0026 

 1.0026 

 1.0020 

 1.0014 

 1.0040 

 1. 0036 



70 



70 



118 



100 



. 81 

 81 

 85 



0.0 

 0.0 

 0.0 

 0.0 

 0.0 

 0.0 

 0.0 



3.76 

 3.92 

 5.15 

 5.15 

 5.31 

 5.15 

 5.15 



1.0080 

 1.0086 

 1.0074 

 1.0070 

 1.0084 

 1.0077 

 1.0096 



°C. 

 98 

 98 

 98 

 98 

 98 

 98 

 88 



40 

 60 

 44 

 45 

 32 

 58 

 57 



OTCO 

 COCO 



a°. 



> 



2. 30 p. m 



3.30 p. m 



4. 30 p. m 



Average 



25 





86 



0.0 



4.79 





98 



52 









Volume of raw tuba distilled, liters 

 Average of polarization of waste 



Low grade. 

 Alcohol produced, proof liters 1,125 

 Per cent alcohol by volume 71.92 



Average acidity, cc. 0.1 N. 3.0 



Liters of absolute alcohol produced 



Per cent alcohol produced in tuba distil- 

 late 



Liters of absolute alcohol possible of 

 recovery 



Liters of absolute alcohol lost 



Per cent of alcohol in tuba lost 



Per cent of alcohol lost 



Efficiency of plant, per cent 



48,327 

 0.0 



High grade. 

 1,410 

 87.67 

 1.0 



2,045.25 



4.24 



2,314.87 



269.63 



0.55 



11.65 



88.35 



None of the distilled tuba contained any molasses and tests made in the Manila 

 laboratory proved the absence of invert sugar, thus showing complete fermentation. 



The waste from each of the four machines is run through a final condenser 

 and the vapors arising from its high temperature are condensed and returned 

 to the tuba tank for redistillation. An average of six tests made upon these 

 condensed vapors gave 0.75 per cent of alcohol by volume. 



Another practice observed at San Esteban is the neutralization of the acids 

 in the tuba with lime. The effect may be seen in the lower acidity of the San 

 Esteban product as compared to that of Hagonoy, where no attempt was made to 

 neutralize. 



Whether or not neutralization has any effect upon minimizing the loss 

 in the waste is a matter for conjecture. The fact remains that much 



