International Sugar Journal

Multi-bag filter used as sentry filter at the Malelane sugar refinery* [Full subscriber]

Abstract The decolourisation process used at Malelane sugar refinery is carbonatation and colour precipitation followed by light sulphitation. This combination is adequate for the production of refined sugar to EEC2 specification. Intermittent incidences of high turbidity and insoluble solids levels were experienced, the origin of which were attributed to breakthroughs of suspended matter from the final set of filters. Adding a polish filtration step was considered as a suitable solution; however, due to the cost of a full scale polish plant, it was decided to first determine the nature and quantity of suspended contaminants present in the filtered liquor. Pilot…

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