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

Table 1

Sugar loss and microbial count (CFU/mL) for (a) untreated and (b) concentrated OPF juice stored at 4 and 30°C.

(a)

	Total sugar loss after 10 days (%)		Microbial count after 10 days (CFU/mL)
	Stored at 4°C	Stored at 30°C	Stored at 4°C	Stored at 30°C
Raw OPF juice	29.5	56.5	7.2×10^6	5.0×10^7

Results are means ± SD of two determinations.

(b)

Water removal (%)	Rotary evaporator			Direct boiling
	Total sugar loss after 10 days (%)	Microbial count (CFU/mL)		Total sugar loss after 10 days (%)	Microbial count (CFU/mL)
		Day 0	Day 10		0th day	10th day
Storage at 4°C
60	32.1	3.0×10^4	2.7×10^6	27.3	3.0×10^4	2.1×10^6
80	18.9	2.0×10^4	8.5×10^5	16.8	2.0×10^4	4.7×10^5
90	12.8	8.5×10^3	4.0×10^5	13.7	8.5×10^3	2.5×10^5
95	8.1	4.5×10^3	3.0×10^5	6.3	4.5×10^3	2.0×10^5
Storage at 30°C
60	37.7	3.8×10^4	3.5×10^6	35.2	3.0×10^4	2.0×10^6
80	19.2	2.4×10^4	1.1×10^6	18.1	2.0×10^4	5.5×10^5
90	12.9	2.0×10^4	5.6×10^5	13.2	8.5×10^3	2.5×10^5
95	8.5	1.5×10^4	3.0×10^5	10.5	4.5×10^3	2.5×10^5

Results are means ± SD of two determinations.