Sunlight potential for microalgae cultivation in the mid-latitude region – the Baltic states
Laen...
Kuupäev
2018
Kättesaadav alates
Autorid
Stunda-Zujeva, A.
Zuteris, M.
Rugele, K.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Products, e.g. food and feed from microalgae are a promising part of bioeconomy. One
of the most investigated and highly demanded microalgae is
Spirulina
. Light
is one of limi
ting
factors for biomass cultivation by photosynthesis. Sunlight is cheap and climate friendly light
source.
The aim of this study was to evaluate available sunlight potential in the mid
-
latitude
region
-
the Baltic states (Europe, 55
–
60
°N
) for microalgae, e.g.
Spirulina
growth. The
data of
Climate atlas based on satellites of EUMETSAT and data from an observation station in Riga
were analyzed. The latitude and climate (cloudiness) were main parameters affecting the total
solar radiation re
ceived by Earth’s surface. The sunlight potential in the Baltic states was higher
than in most of Europe in similar latitude. Multi
-
year mean daylight intensity in the Baltic states
was slightly less than in Southern France or Bulgaria, (26
klux
and 30
klu
x
, respectively, in
summer) where
Spirulina
is commercially produced. Hourly solar radiation varied a lot in the
Baltic states
–
from 880
W
m
-
2
to 200
W
m
-
2
, sunny and overcasted noon of summer day
,
respectively; average value (8
a.m.
–
4p.m.) was 450
W
m
-
2
.
Summer days are longer than 12
h,
reaching 18
h in midsummer. The sunlight potential is suitable for microalgae, e.g.
Spirulina
cultivation in this period. From November till February days are shorter than 10
h and solar
radiation is less than 300
W
m
-
2
e
ven in noon of sunny days.
Kirjeldus
Article
Märksõnad
sunlight, solar radiation, microalgae, mid-latitude, Europe, the Baltic states, articles