Effect of Extruder Screw Speed, Temperature, and Enzyme Levels on Sugar Recovery from Different Biomasses

Table 5

Effect of screw speed and temperature on sugar recovery from prairie cord grass.

Screw speed, rpm	Temperature, ^°C
	100	150	200	100	150	200	100	150	200
	1 cellulase : 1 β-glucosidase			1 cellulase : 4 β-glucosidase			1 multienzyme : 1 β-glucosidase
Glucose
100	31.7^ab	22.2^cd	24.4^b-d	32.4^a	32.2^a	36.7^a	16.3^f	20.2^cd	17.5^c-e
150	34.5^a	20.9^d	25.9^b-d	41.1^a	39.2^a	21.3^a	22.8^ab	19.5^c-e	19.1^c-e
200	29.6^a-c	22.2^cd	25.3^b-d	37.3^a	31.7^a	29.1^a	23.9^a	21.1^bc	18.8^de
Xylose
100	12.1^ab	7.9^b	12.1^ab	43.5^a	43.9^a	46.4^a	2.2^c	3.0^bc	7.4^a
150	11.9^ab	7.8^b	15.6^a	49.2^a	50.0^a	33.6^a	2.7^bc	2.7^bc	6.6^a
200	9.3^b	8.3^b	14.9^a	44.8^a	43.1^a	40.3^a	2.5^bc	3.8^b	7.7^a
Combined sugar
100	25.6^ab	18.8^bc	21.0^a-c	34.7^a	37.8^a	41.2^a	12.3^e	15.3^cd	14.8^d
150	28.0^a	17.3^c	23.1^a-c	44.6^a	44.5^a	24.0^a	17.0^a	14.7^d	15.7^bc
200	23.9^a-c	18.3^c	21.8^a-c	39.9^a	35.7^a	31.8^a	17.67^a	16.2^b	15.8^bc

Control: 20.9% glucose, 33.8% xylose, and 23.8% combined sugar (with 1 : 4 cellulase to β-glucosidase). Superscripts with same letter within column are not significantly different for each sugar under each enzyme combination.