Production of Aspergillus niger biomass on sugarcane distillery wastewater: physiological aspects and potential for biodiesel production

Table 3 Biochemical properties of the fractions eluted after SEC fractionation of raw and fermented SDW: quantitative distribution of each fraction and ratio of maxima fluorescence intensity for the three A, B and C peak areas detected in their EEM

Fractions	Peak (mL)	Repartition of peak area compared to total area (%)		A/B EEM peak area		A/C EEM peak area
Fractions	Peak (mL)	Raw SDW	Fermented SDW	Raw SDW	Fermented SDW	Raw SDW	Fermented SDW
F1	24 ± 2	–	5.31	–	2.0	–	3.9
F2	38 ± 1	12.1	25.67	1.9	1.8	0.6	0.4
F3	41.5 ± 1.5	31.6	8.73	1.8	1.8	1.2	3.3
F4	45 ± 1	15.3	14.32	2.2	2.2	2.5	2.2
F5	49 ± 1.5	7.7	18.63	1.7	1.7	2.6	4.4
F6	52.25 ± 1.25	2.7	4.02	0.7	1.1	3.5	1.8
F7	55.75 ± 2.25	7.1	7.77	0.6	0.8	5.1	4.0

A corresponds to the maximum intensity of the peak area related to protein-like (PN-like) substances, B to phenolic gallic acid-like (PA-like) molecules and C to the humic acid-like (HA-like) substances. SEC and EEM profiles were obtained from supernatants of SDW pre-treated by A. niger during 5 days

ISSN: 2054-3085