Wednesday, October 15, 2008

CLARIFYING AGENTS FOR THICK CANE JUICE
FROM A FIELD PROCESSOR


Hendro Santoso M , Yahya Kurniawan and Edi Purnomo
(Indonesian Sugar Research Institute)


ABSTRACT

The clarification process of thick juice to reduce non sugar components had been done. Poly aluminium chloride (PAC) and Phosphoric acid were used as clarifying agents in this experiment. Composition of thick juice from a field processor i.e. colour of ICUMSA varied from 11.000 to 18.000 IU, turbidity between 900 to 2000 ppm SiO2 , sludge content between 1,75 to 3,5 g per 100 ml and ash content between 2 to 3 %. The aim of this experiment was to evaluate the potency of PAC (25 – 100 ppm) and Phosphoric acid to clarify of thick juice (50 – 60 brix). The non sugar components such as colour, turbidity, sludge and ash content were reduced by both agents. Sludge content was reduced between 11,56 to 78,9% by PAC and 21,49 to 50,64% by Phosphoric acid treatment. The loss of total sugar was less than 5% for both treatments. PAC could reduced colour of ICUMSA between 0,98 to 17,65%, turbidity 33,03 to 53,54% and ash 1,82 to 12,48%. Furthermore, by using Phosphoric acid treatment it could reduced colour of ICUMSA between 13,07 to 29,73 %, turbidity 36,53 to 47,10 % and ash 11,11 to 12,59 %. Sludge and turbidity removals treated with PAC were higher than that with phosphate. In contrast, PAC treatment in colour reducing of thick juice was lower than phosphate. There was no difference in ash removed for both treatment.

Key words : Polyaluminium chloride, thick cane juice, field processor.


(Indonesian Sugar Research Journal Vol.XXXIV (2) Juni 1998 :32-42)

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