Simultaneous improvement in production of microalgal biodiesel and high-value alpha-linolenic acid by a single regulator acetylcholine

Table 1 Effectiveness of acetylcholine on Chlorella sorokiniana U2-9

	ACh (μg L ⁻¹ )
	0	0.125	0.25	0.5	1	5	10
Dry weight (gL⁻¹)	2.16 ± 0.2	2.2 ± 2	2.2 ± 0.2	2.4 ± 0.17	2.43 ± 0.2	2.73 ± 0.1	2.66 ± 0.15
Total lipid content (mg g⁻¹ of dry weight)	214.3 ± 14	223.3 ± 16	231.6 ± 12	252 ± 10	296 ± 26	303 ± 24	190 ± 12
Lipid productivity (mgL⁻¹ day⁻¹)	46.4 ± 6	49.3 ± 7	50.8 ± 4	60.5 ± 4	72.4 ± 8	82.8 ± 6	50.7 ± 5

Note: Acetylcholine was more efficient at doses of 0.5 to 5 μg L⁻¹, but it exposed negative effects on lipid content and lipid productivity at 10 μg L⁻¹. ACh was added at the initial phase of algal growth. All data were given as mean ± standard error (n = 3) of three separated tests.

ISSN: 2731-3654