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,
Год журнала:
2024,
Номер
926, С. 171734 - 171734
Опубликована: Март 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,
Год журнала:
2023,
Номер
902, С. 166479 - 166479
Опубликована: Авг. 21, 2023
Membrane
fouling
is
a
major
challenge
which
limits
the
sustainable
application
of
membrane
filtration-based
microalgal
harvesting
at
industrial
level.
leads
to
increased
operational
and
maintenance
costs
represents
obstacle
downstream
processing.
Nano-clays
are
promising
naturally
occurring
nanoparticles
in
fabrication
due
their
low-cost,
facile
preparation,
superior
properties
terms
surface
hydrophilicity,
mechanical
stability,
resistance
against
chemicals.
The
modification
using
nano-clays
approach
improve
membranes
resistance.
However,
positive
effects
nano-clay
particles
on
often
limited
by
aggregation
poor
adhesion
base
polymeric
matrix.
This
review
surveys
recent
efforts
achieve
anti-fouling
behavior
with
fillers.
Further,
strategies
better
incorporation
polymer
matrix
summarised,
factors
that
govern
fouling,
adhesion,
agglomeration
leaching
discussed
depth.
The Science of The Total Environment,
Год журнала:
2024,
Номер
924, С. 171320 - 171320
Опубликована: Март 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,
Год журнала:
2024,
Номер
371, С. 123015 - 123015
Опубликована: Окт. 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,
Год журнала:
2024,
Номер
354, С. 141688 - 141688
Опубликована: Март 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,
Год журнала:
2024,
Номер
65, С. 105811 - 105811
Опубликована: Июль 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.
Current Research in Biotechnology,
Год журнала:
2024,
Номер
7, С. 100201 - 100201
Опубликована: Янв. 1, 2024
In
present
times,
there
is
increasing
potential
of
algal-based
membrane
bioreactors
(MBRs)
considering
the
removal
hazardous
and
toxic
contaminants
from
different
wastewater
sources.
The
article
summarizes
on
various
types
that
can
be
effectively
removed
using
MBRs,
including
heavy
metals
emerging
contaminants.
selection
criteria,
advantages
limitations
algal
species
used
in
MBRs
are
also
discussed.
For
optimal
performance
operating
parameters
viz.
hydraulic
retention
time,
organic
loading
rate,
nutrient
levels,
light
intensity
duration
essential.
review
further
highlights
efficient
contaminants,
biomass
productivity,
fouling
as
critical
indicators.
Various
applications
particularly
treatment
municipal
industrial
discharges,
landfill
leachate
treatment,
bioremediation
contaminated
sites,
Finally,
current
identifies
technological
limitations,
scale-up
challenges,
economic
feasibility
provides
directions
future
researches.
On
whole,
offer
a
sustainable
worthwhile
solution
eradication
harmful
lethal
effluent
