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.
The Science of The Total Environment,
Journal Year:
2024,
Volume and Issue:
926, P. 171734 - 171734
Published: March 18, 2024
Botryococcus
braunii
has
garnered
significant
attention
in
recent
years
due
to
its
ability
produce
high
amounts
of
renewable
hydrocarbons
through
photosynthesis.
As
the
world
shifts
towards
a
greener
future
and
seeks
alternative
sources
energy,
cultivation
B.
extraction
can
potentially
provide
viable
solution.
However,
development
sustainable
cost-effective
process
for
cultivating
is
not
without
challenges.
Compared
other
microalgae,
grows
very
slowly,
making
it
time-consuming
expensive
biomass.
In
response
these
challenges,
several
efforts
have
been
put
into
optimizing
systems
increase
biomass
growth
hydrocarbon
production
efficiency.
This
review
presents
comparative
analysis
different
systems,
factors
affecting
productivity
are
critically
discussed.
Attached
offers
advantages,
including
higher
less
water
requirement
compared
liquid
culture.
These
advantages
hold
potential
enhancing
economic
viability
microalgal
fuels.
Here,
we
propose
that
employing
attached
cultivation,
coupled
with
milking
technique
extraction,
represents
an
efficient
approach
generating
fuels
from
braunii.
Nevertheless,
further
research
needed
ascertain
large-scale
implementation.
The Science of The Total Environment,
Journal Year:
2024,
Volume and Issue:
924, P. 171320 - 171320
Published: March 6, 2024
Anaerobic
digestion
of
organic
waste
produces
effluent
(ADE)
that
requires
further
treatment.
Biofilm-based
microalgal
cultivation
is
a
favoured
approach
to
ADE
This
study
compared
Chlorella
sp.
MUR
268
and
Scenedesmus
269
in
biofilm
suspension
cultures
treat
anaerobic
digestate
food
(ADFE).
had
significantly
higher
biomass
(50.38
g
m−2)
than
(9.39
m−2).
Conversely,
yielded
1.5
times
more
(1.2
L−1)
suspension.
49.3
%
areal
productivity
suspension,
while
showed
87.3
growth
removed
nutrients
ADFE.
In
COD,
ammoniacal
nitrogen,
phosphate
were
reduced
94.9,
5.2,
5.98
mg
L−1
for
268,
245,
2.89,
3.22
269,
respectively.
biofilm,
achieved
reductions
149.9,
1.16,
3.57
L−1,
100.2,
6.9
2.07
L−1.
Most
these
values
are
below
the
recommended
discharge
standard,
highlighting
efficacy
this
system
ADFE
Biofilm
fixed
68–81
nitrogen
was
biomass,
only
55–71
ended
biomass.
88
phosphorus,
phosphorus
(55
%)
counterpart
(34
%).
design
offers
advantages
like
simplified,
cost-effective
operation,
easy
recovery,
water
usage.
Journal of Environmental Management,
Journal Year:
2024,
Volume and Issue:
371, P. 123015 - 123015
Published: Oct. 31, 2024
Optimizing
light
conditions
in
any
culture
design
for
effluent
treatment
is
crucial
maximizing
microalgae
growth
and
nutrient
uptake.
We
investigated
the
impact
of
low
(53
±
1
μmol
m
Chemosphere,
Journal Year:
2024,
Volume and Issue:
354, P. 141688 - 141688
Published: March 12, 2024
Microalgal-based
treatment
of
anaerobic
digestate
food
effluent
(ADFE)
has
been
found
to
be
efficient
and
effective.
However,
turbidity
high
total
ammonia
nitrogen
(TAN))
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
TAN
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
concentrations.
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.
Journal of Water Process Engineering,
Journal Year:
2024,
Volume and Issue:
65, P. 105811 - 105811
Published: July 26, 2024
Selecting
microalgal
species
with
efficient
nutrient
uptake
capabilities
and
employing
an
effective
cultivation
system
are
critical
to
successful
AD
effluent
reclamation.
While
Scenedesmus
sp.
MUR
272
Chlorella
269
have
shown
efficiency
in
suspension-based
ADFE
treatment,
biofilm-based
presents
a
promising,
cost-efficient
alternative
for
valorization.
Our
study
investigates
the
feasibility
of
cultivating
these
strains
biofilm
treat
ADFE,
using
modified
F/2
medium
as
control.
Growth
monitoring
Chlorophyll
(ChlF
a)
fluorescence
measurement
assessed
algal
performance
biofilm.
Biomass
yield
ranked
follows:
ADFE>Scenedesmus
MF/2>Chlorella
MF/2.
Both
demonstrated
significantly
higher
biomass
productivity
than
ChlF
data
revealed
that
maintained
relatively
more
stable
photosynthetic
culture
progressed.
exhibited
similar
induction
curve
both
F/2.
intensity
increased
progressed,
decreased
till
day
10,
especially
at
J
I
step,
suggesting
presence
stress
factor
culture.
Efficient
removal
was
achieved
87–100
%
ammoniacal
nitrogen
(NNH3)
73–85
phosphate.
More
protein
carbohydrates
were
produced
on
4
10
species,
showing
metabolites
Scenedesmus.
These
species'
hold
promise
valorization
effluents.
