Ethanol Production from Oil Palm Trunk: A Combined Strategy Using an Effective Pretreatment and Simultaneous Saccharification and Cofermentation

Table 8

Xylose and glucose content of S. cerevisiae/P. stipitis simultaneous saccharification and cofermentation (SSCF) process.

No.	Temp (°C)	Fermentation (day)	Cell ratio	Simultaneous saccharification and cofermentation						Δ substrate	Ethanol (%)	Fermentation efficiency (%)
				Before			After
				Xylose	Glucose	Total	Xylose	Glucose	Total
1	35	7	0.75 : 0.25	1.062	8.435	9.497	0.694	0.054	0.748	8.749	1.34	30,03
2	35	7	0.25 : 0.75	1.062	8.435	9.497	0.295	0.037	0.332	9.165	0.87	18,61
3	35	3	0.75 : 0.25	0.759	7.002	7.761	0.970	2.095	3.065	4.696	1.50	62,63
4	35	3	0.25 : 0.75	0.759	7.002	7.761	0.915	1.068	1.983	5.778	1.45	49,21
5	25	7	0.75 : 0.25	0.841	5.702	6.543	0.000	0.000	0.000	6.543	1.34	40,16
6	25	7	0.25 : 0.75	0.841	5.702	6.543	0.000	0.000	0.000	6.543	0.64	19.18
7	25	3	0.75 : 0.25	0.419	5.042	5.461	0.000	0.026	0.026	5.435	0.67	24,17
8	25	3	0.25 : 0.75	0.419	5.042	5.461	0.000	0.042	0.042	5.419	0.58	20,99
9	38	5	0.50 : 0.50	1.124	10.319	11.443	1.201	7.758	8.959	2.484	0.88	69,46
10	22	5	0.50 : 0.50	0.780	4.920	5.700	0.000	0.050	0.050	5.650	1.34	46,50
11	30	8 days, 10 h	0.50 : 0.50	0.691	6.160	6.851	0.000	0.0027	0.027	6.824	0.78	22,41
12	30	1 day, 15 h	0.50 : 0.50	0.340	4.358	4.698	0.660	1.029	1.689	3.009	0.82	53,43
13	30	5	0.92 : 0.08	0.626	6.163	6.789	0.000	0.060	0.060	6.729	1.25	36,42
14	30	5	0.08 : 0.92	0.626	6.163	6.789	0.000	0.000	0.000	6.789	0.78	22,53
15	30	5	0.50 : 0.50	0.626	6.163	6.789	0.000	0.026	0.026	6.763	2.18	63,20
16	30	5	0.50 : 0.50	0.626	6.163	6.789	0.000	0.027	0.027	6.762	1.77	51,32
17	30	5	0.50 : 0.50	0.626	6.163	6.789	0.000	0.028	0.028	6.761	1.84	53,36
18	30	5	0.50 : 0.50	0.626	6.163	6.789	0.000	0.027	0.027	6.762	2.25	65,24
19	30	5	0.50 : 0.50	0.626	6.163	6.789	0.000	0.075	0.075	6.714	1.89	55,20
20	30	5	0.50 : 0.50	0.626	6.163	6.789	0.000	0.026	0.026	6.763	2.00	57,99