Impact of cultivar selection and process optimization on ethanol yield from different varieties of sugarcane

Table 5 Glucose yield/recovery and combined sugar yield after pretreatment and enzymatic hydrolysis of bagasse samples

Run	Enzymatic hydrolysis								^bOverall glucose recovery (%)				^cCombined sugar yield (g/100 g RM)
	Glucose yield (g/100 g RM)				^aDigestibility (%)				^bOverall glucose recovery (%)				^cCombined sugar yield (g/100 g RM)
	55	70	74	120	55	70	74	120	55	70	74	120	55	70	74	120
Untreated	11.7	12	9.2	8.9	27.5	28.6	21.7	20.2	-	-	-	-	15.7	17	13	12.5
1	26.7	25	21	20.8	66.4	63.6	50.5	48.6	68.1	65.0	56.7	50.0	54.3	48	40.6	39.6
2	33.9	36	29	29	87.6	97.0	71.9	69.3	86.9	96.3	73.2	70.5	59.6	62	51.8	47.6
3	30.6	34	27	29.6	78.6	91.6	68.4	72.3	79.9	91.4	70.9	72.7	58.6	60	48.8	48.3
4	36.5	35	31	32.2	96.6	97.1	81.1	81.1	96.3	96.3	80.3	81.8	60.3	55	49.3	45
5	27.4	26	20	24.5	67.5	64.8	49.7	57.5	68.1	65.0	52.0	59.1	51.5	51	42.2	45.3
6	38.7	33	31	29.6	100.0	92.9	81.5	72.6	98.7	91.4	82.7	72.7	58.7	55	51.2	44
7	29.9	33	21	24.3	74.3	84.5	50.8	56.8	75.2	86.6	52.0	59.1	58	58	42.4	42.4
8	37.5	36	30	31.9	99.2	97.2	76.8	77.1	98.7	96.3	78.0	79.5	62.3	62	52.7	47.4
9	38	35	28	27.7	99.3	92.4	70.9	67.4	96.3	93.9	70.9	68.2	64.8	65	53.3	50.3
10	37.8	35	28	27.4	95.4	92.8	70.1	65.8	96.3	93.9	73.2	68.2	65.5	64	52.6	49.1
11	38.4	35	28	27.3	97.4	94.4	71.2	65.6	98.7	93.9	70.9	68.2	66.1	63	52.1	48.3

The acid concentration at all pretreatment conditions was kept constant at 0.5% (w/w).
^aDigestibility was calculated as glucose yield divided by the potential glucose in the WIS expressed in percentage.
^bOverall glucose recovery is the sum of glucose obtained after pretreatment and enzymatic hydrolysis divided by potential glucose in the native material expressed in percentage.
^cCombined sugar yield is the sum of glucose, xylose and arabinose obtained after pretreatment and enzymatic hydrolysis.
RM, raw material; WIS, water insoluble solid.

ISSN: 2731-3654