Oil Palm Frond Juice as Future Fermentation Substrate: A Feasibility Study

Table 2

Water activity of concentrated OPF juice.

Water removal (%)	𝑎w at 28°C
	Direct boiling	Rotary evaporator
60	0.937	0.937
80	0.923	0.925
90	0.886	0.887
95	0.833	0.836