Towards Optimisation of Microalgae Cultivation through Monitoring and Control in Membrane Photobioreactor Systems
Water,
Journal Year:
2023,
Volume and Issue:
16(1), P. 155 - 155
Published: Dec. 30, 2023
This
research
lays
a
foundation
for
optimised
membrane
photobioreactor
performance
and
introduces
novel
control
parameters
crucial
advancing
microalgae
cultivation
techniques
promoting
environmental
sustainability.
Particularly,
this
study
presents
an
innovative
solids
retention
time
(SRT)
controller
designed
pilot-scale
photobioreactor.
Employing
fuzzy-logic
knowledge-based
approach,
uses
the
first
derivative
of
pH
data
dynamics
(pH′)
as
input
variable,
directly
correlated
with
nitrogen
recovery
rate
biomass
productivity
when
normalised
by
average
light
irradiance
(I2).
Through
feedback
mechanism,
it
regulates
daily
SRT
variations,
ensuring
stable
reactor
operation,
optimal
volatile
suspended
concentration,
efficient
removal,
enhanced
productivity.
Normalised
rate,
considering
solar
increased
51%
compared
to
previous
studies
employing
fixed
hydraulic
(HRT).
Combining
previously
studied
HRT
could
potentially
amplify
efficiency.
In
addition,
controlling
or
not
are
assessed
in
terms
filtration
GHG
emissions.
Finally,
new
dissolved-oxygen-based
parameter
shows
promise
continuous
culture
control.
Language: Английский
Ultrafiltration Harvesting of Microalgae Culture Cultivated in a WRRF: Long-Term Performance and Techno-Economic and Carbon Footprint Assessment
Published: Dec. 5, 2023
A
cross-flow
ultrafiltration
harvesting
system
of
a
pre-concentrated
microalgae
culture
was
tested
in
an
innovative
anaerobic-based
WRRF.
The
cultivated
membrane
photobioreactor
fed
with
the
effluent
from
anaerobic
bioreactor
treating
sewage.
These
harvested
biomass
then
anaerobically
co-digested
primary
and
secondary
sludge
water
line.
Depending
on
needs
this
co-digestion,
filtration
process
evaluated
intermittently
over
period
212
days
for
different
operating
conditions,
mainly
total
amount
desired
final
solids
concentration
(up
to
15.9
g·L1
average
9.7
g·L1).
Concentration
ratios
15-27
were
obtained
transmembrane
fluxes
ranged
5
28
L·m2·h1.
Regarding
cleaning,
both
backflushing
chemical
cleaning
resulted
flux
recoveries
that
were,
average,
21%
higher
than
those
achieved
alone.
carbon
footprint
assessment
shows
promising
results
as
GHG
emissions
associated
could
be
less
savings
energy
recovered
biogas
production
valorisation
microalgae.
Language: Английский