Microalgal-based
treatment
of
anaerobic
digestate
food
effluent
(ADFE)
has
been
found
to
be
efficient
and
effective.
However,
turbidity
high
ammoniacal
nitrogen
(NH3-N)
content
ADFE
is
a
major
setback,
requiring
significant
dilution.
Although
the
possibility
growing
microalgae
in
high-strength
with
minimal
dilution
demonstrated
suspension
cultures,
such
effluents
remain
highly
turbid
affect
light
path
cultures.
Here,
feasibility
Chlorella
sp.
(MUR
269)
biofilm
treat
ammonium
concentrations
was
investigated.
Six
different
were
evaluated
for
their
effects
on
growth
nutrient
removal
by
MUR
269
using
perfused
technique.
Biomass
yields
productivities
this
alga
at
various
(mg
N
NH3
L-1)
55a
(108
g
m-2
9.80
d-1)>100b>200c=300c=500c>1000d.
Growth
inhibited,
resulting
28%
reduction
yield
when
grown
1000
mg
L-1.
A
survey
photosynthetic
parameters
reveals
evidence
stress
occurring
following
sequence:
55<100<200<300<1000.
observed
across
ammonium.
The
pattern
also
followed
concentration
gradients
except
COD,
where
highest
occurred
500
Higher
rates
seen
higher
declined
gradually
over
time.
In
general,
our
results
indicated
that
strategy
efficient,
minimizes
water
consumption,
offers
easy
biomass
harvesting,
better
exposure
light.
Therefore,
it
can
suitable
treating
concentrated
reduce
concentration.
Biotechnology for Biofuels and Bioproducts,
Год журнала:
2024,
Номер
17(1)
Опубликована: Май 10, 2024
Abstract
Botryococcus
braunii
,
a
colonial
green
microalga
which
is
well-known
for
its
capacity
to
synthesize
hydrocarbons,
has
significant
promise
as
long-term
source
of
feedstock
the
generation
biofuels.
However,
cultivating
and
scaling
up
B.
using
conventional
aqua-suspended
cultivation
systems
remains
challenge.
In
this
study,
we
optimized
medium
components
light
intensity
enhance
lipid
hydrocarbon
production
in
multi-cultivator
airlift
photobioreactor.
BBM
3N
with
200
μmol/m
2
/s
16
h
light–8
dark
regimen
yielded
highest
biomass
productivity
(110.00
±
2.88
mg/L/day),
well
content.
Cultivation
flat-panel
bioreactor
resulted
significantly
higher
(129.11
2.74
(32.21
1.31
(28.98
2.08
mg/L/day)
compared
Erlenmeyer
flasks
open
20-L
raceway
pond.
It
also
exhibited
20.15
1.03%
protein
content
including
elevated
levels
chlorophyll
b
carotenoids.
This
work
noteworthy
since
it
first
describe
fatty
acid
profiles
during
cobalt
treatment.
The
study
demonstrated
that
high
concentrations
(up
5
mg/L
nitrate)
culture
affected
synthesis,
resulting
amounts
n
-alkadienes
trienes
lipids
monounsaturated
acids
concentration.
Furthermore,
pyrolysis
experiments
on
microalgal
de-oiled
revealed
compounds
generated
by
thermal
degradation
facilitate
extra
economical
value
system.
Microalgal-based
treatment
of
anaerobic
digestate
food
effluent
(ADFE)
has
been
found
to
be
efficient
and
effective.
However,
turbidity
high
ammoniacal
nitrogen
(NH3-N)
content
ADFE
is
a
major
setback,
requiring
significant
dilution.
Although
the
possibility
growing
microalgae
in
high-strength
with
minimal
dilution
demonstrated
suspension
cultures,
such
effluents
remain
highly
turbid
affect
light
path
cultures.
Here,
feasibility
Chlorella
sp.
(MUR
269)
biofilm
treat
ammonium
concentrations
was
investigated.
Six
different
were
evaluated
for
their
effects
on
growth
nutrient
removal
by
MUR
269
using
perfused
technique.
Biomass
yields
productivities
this
alga
at
various
(mg
N
NH3
L-1)
55a
(108
g
m-2
9.80
d-1)>100b>200c=300c=500c>1000d.
Growth
inhibited,
resulting
28%
reduction
yield
when
grown
1000
mg
L-1.
A
survey
photosynthetic
parameters
reveals
evidence
stress
occurring
following
sequence:
55<100<200<300<1000.
observed
across
ammonium.
The
pattern
also
followed
concentration
gradients
except
COD,
where
highest
occurred
500
Higher
rates
seen
higher
declined
gradually
over
time.
In
general,
our
results
indicated
that
strategy
efficient,
minimizes
water
consumption,
offers
easy
biomass
harvesting,
better
exposure
light.
Therefore,
it
can
suitable
treating
concentrated
reduce
concentration.
