부산대학교 도서관

The osmotic energy of cane molasses was used to drive the partial dewatering of sugarcane juice by Forward Osmosis. The studies were conducted at low molasses to juice ratio considering their relative abundances. Studies in recirculation mode provided insight into the maximum possible extent of dewatering and the variation of permeate flux ( J w ) with bulk osmotic pressure difference. Operation in continuous single pass (CSP) mode helped maximise the throughput and J w . Data on permeation selectivity, back diffusion and osmotic energy use efficiency were additionally obtained for both modes of operation. The optimised CSP mode process was evaluated in a sugar mill employing commercial process streams. Energy saving – owing to reduced juice evaporation load – and freshwater saving – owing to simultaneous dilution of molasses – were the twin gains from the process considering sugar and ethanol as the final products. Areas of process improvement were identified. [ABSTRACT FROM AUTHOR]