Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\24932216
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Biotechnol+Biofuels
2014 ; 7
(ä): 84
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Chlorella for protein and biofuels: from strain selection to outdoor cultivation
in a Green Wall Panel photobioreactor
#MMPMID24932216
Guccione A
; Biondi N
; Sampietro G
; Rodolfi L
; Bassi N
; Tredici MR
Biotechnol Biofuels
2014[]; 7
(ä): 84
PMID24932216
show ga
BACKGROUND: Chlorella is one of the few microalgae employed for human
consumption. It typically has a high protein content, but it can also accumulate
high amounts of lipids or carbohydrates under stress conditions and, for this
reason, it is of interest in the production of biofuels. High production costs
and energy consumption are associated with its cultivation. This work describes a
strategy to reduce costs and environmental impact of Chlorella biomass production
for food, biofuels and other applications. RESULTS: The growth of four Chlorella
strains, selected after a laboratory screening, was investigated outdoors in a
low-cost 0.25 m(2) GWP-II photobioreactor. The capacity of the selected strains
to grow at high temperature was tested. On the basis of these results, in the
nitrogen starvation trials the culture was cooled only when the temperature
exceeded 40°C to allow for significant energy savings, and performed in a
seawater-based medium to reduce the freshwater footprint. Under nutrient
sufficiency, strain CH2 was the most productive. In all the strains, nitrogen
starvation strongly reduced productivity, depressed protein and induced
accumulation of carbohydrate (about 50%) in strains F&M-M49 and IAM C-212, and
lipid (40 - 45%) in strains PROD1 and CH2. Starved cultures achieved high storage
product productivities: 0.12 g L(-1) d(-1) of lipids for CH2 and 0.19 g L(-1)
d(-1) of carbohydrates for F&M-M49. When extrapolated to large-scale in central
Italy, CH2 showed a potential productivity of 41 t ha(-1) y(-1) for biomass,
16 t ha(-1) y(-1) for protein and 11 t ha(-1) y(-1) for lipid under nutrient
sufficiency, and 8 t ha(-1) y(-1) for lipid under nitrogen starvation.
CONCLUSIONS: The environmental and economic sustainability of Chlorella
production was enhanced by growing the organisms in a seawater-based medium, so
as not to compete with crops for freshwater, and at high temperatures, so as to
reduce energy consumption for cooling. All the four selected strains are good
candidates for food or biofuels production in lands unsuitable for conventional
agriculture. Chlorella strain CH2 has the potential for more than 80 tonnes of
biomass, 32 tonnes of protein and 22 tonnes of lipid per year under favourable
climates.