Suphi Öncel - Academia.edu (original) (raw)
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BACKGROUND: Recent studies indicate that microalgal cultivation using organic carbon sources has ... more BACKGROUND: Recent studies indicate that microalgal cultivation using organic carbon sources has the potential to provide high yields. Haematococcus pluvialis and Chlorella zofingiensis, two important carotenoid producers, were selected for co-culture cultivations to utilize the unique advantages of both organisms. A co-culture production process was investigated in terms of the effects of organic carbon source, co-cultivation method, and light intensity on carotenoid production.
Chlorella vulgaris SAG 211-12, a green microalga, as model organism was cultivated photomixotroph... more Chlorella vulgaris SAG 211-12, a green microalga, as model organism was cultivated photomixotrophically
using various organic carbon and nitrogen sources at Erlenmeyer scale. The modified medium selected
for the experiments was standard BG11 supplemented with 5 g l
1 glucose and 1 g l
1 proteose peptone
(PP). To evaluate the effects of light/dark cycles, 12:12; 18:6 and 24:0 light/dark cycle conditions were
examined on hourly basis. 24:0 continuous illumination condition was chosen to continue 2 l continuous
stirred tank photobioreactor (CSTR) experiments under 1 vvm aeration, 120 rpm mixing time, 23 2 C,
and 70mE m2 s
1 illumination conditions. The results showed significant effect of the culture conditions
on the cellular composition. To enhance digestibility of the intact cell; dry biomass was digested with
pancreatin enzyme solution and in vitro protein digestibility (IVPD) of crude biomass (UTS), cell debris
(CVA) and protein hydrolysates (CVH) was measured. IVPD values of UTS, CVA and CVH were found to be
33–41%, 46–58%, 67–89%; respectively with no significant changes regarding culture conditions
(p > 0,05). Results also showed the positive effect of the enzyme treatment for digestion which is a key
advantage for nutritional characteristic of the algal biomass.
BACKGROUND: Recent studies indicate that microalgal cultivation using organic carbon sources has ... more BACKGROUND: Recent studies indicate that microalgal cultivation using organic carbon sources has the potential to provide high yields. Haematococcus pluvialis and Chlorella zofingiensis, two important carotenoid producers, were selected for co-culture cultivations to utilize the unique advantages of both organisms. A co-culture production process was investigated in terms of the effects of organic carbon source, co-cultivation method, and light intensity on carotenoid production.
Chlorella vulgaris SAG 211-12, a green microalga, as model organism was cultivated photomixotroph... more Chlorella vulgaris SAG 211-12, a green microalga, as model organism was cultivated photomixotrophically
using various organic carbon and nitrogen sources at Erlenmeyer scale. The modified medium selected
for the experiments was standard BG11 supplemented with 5 g l
1 glucose and 1 g l
1 proteose peptone
(PP). To evaluate the effects of light/dark cycles, 12:12; 18:6 and 24:0 light/dark cycle conditions were
examined on hourly basis. 24:0 continuous illumination condition was chosen to continue 2 l continuous
stirred tank photobioreactor (CSTR) experiments under 1 vvm aeration, 120 rpm mixing time, 23 2 C,
and 70mE m2 s
1 illumination conditions. The results showed significant effect of the culture conditions
on the cellular composition. To enhance digestibility of the intact cell; dry biomass was digested with
pancreatin enzyme solution and in vitro protein digestibility (IVPD) of crude biomass (UTS), cell debris
(CVA) and protein hydrolysates (CVH) was measured. IVPD values of UTS, CVA and CVH were found to be
33–41%, 46–58%, 67–89%; respectively with no significant changes regarding culture conditions
(p > 0,05). Results also showed the positive effect of the enzyme treatment for digestion which is a key
advantage for nutritional characteristic of the algal biomass.