Enhancing the environmental and economic sustainability of heterotrophic microalgae cultivation: Kinetic modelling and screening of alternative carbon sources
Chemical Engineering Journal Advances,
Год журнала:
2024,
Номер
19, С. 100632 - 100632
Опубликована: Июль 26, 2024
Heterotrophic
microalgae
cultivation
has
been
suggested
to
reduce
conventional
photo-autotrophic
microalgal
biomass
production
costs.
In
heterotrophic
cultivation,
the
most
relevant
operational
costs
are
constituted
by
supply
of
pure
substrates
used
as
carbon
source
(e.g.,
glucose),
and
high
energy
request
for
culture
aeration.
addition,
suboptimal
conditions
temperature
pH
algal
productivity,
further
increasing
this
work,
an
attempt
was
made
define
more
sustainable
cost-effective
strategies
Chlorellaceae
Scenedesmaceae.
Several
by-products
from
a
local
confectionery
industry
were
thus
screened
alternative
sources.
Manufacturing
residues
peppermint
liquorice
candies
allowed
achieve
comparable
maximum
growth
rates
(1.44
d-1),
yields
(0.33
g
COD·g
COD-1)
productivities
(370
mg
COD·L-1·d-1)
those
achieved
using
glucose.
A
preliminary
economic
evaluation
showed
that
could
be
lowered
up
85.6%
substituting
glucose
with
selected
industrial
by-products.
As
fermentation
conditions,
maintained
at
relatively
low
dissolved
oxygen
(DO)
concentrations,
in
large
range
values.
optimal
temperatures
(37.0
–
37.2°C),
values
(6.8
7.4),
DO
concentrations
(>
0.5
1
O2·L-1)
identified.
On
overall,
study
demonstrated
possibility
achieving
reduction
while
implementing
circular
economy
principles
framework
resource
recovery
during
bioremediation
organic
waste.
Язык: Английский
Investigation of self-regulation mechanisms of extracellular organic matters in reused medium on Spirulina platensis
Bioresource Technology,
Год журнала:
2025,
Номер
unknown, С. 132385 - 132385
Опубликована: Март 1, 2025
Язык: Английский
The growth and nutrient removal properties of a newly isolated Desmodesmus sp. XNY-2104 under mixotrophic and heterotrophic conditions using volatile fatty acids (VFAs)
Biomass and Bioenergy,
Год журнала:
2025,
Номер
199, С. 107918 - 107918
Опубликована: Май 1, 2025
Язык: Английский
Investigation of high-rate algal ponds for the treatment of domestic sewage with low carbon-to-nitrogen ratio
Chemical Engineering Journal Advances,
Год журнала:
2024,
Номер
19, С. 100635 - 100635
Опубликована: Авг. 1, 2024
Sewage
with
a
low
carbon-to-nitrogen
(C/N)
ratio
can
be
effectively
treated
using
high-rate
algal
ponds
(HRAPs),
consisting
of
combined
symbiotic
system
algae
and
bacteria.
However,
HRAPs
have
been
predominantly
used
in
laboratories,
but
their
application
wastewater
treatment
plants
is
yet
to
realized.
Herein,
laboratory
pilot-scale
experimental
studies
were
conducted
wetland
effluent
from
the
Baitabao
estuary
ecological
plant
Liaozhong
County.
The
ammonia
nitrogen
(NH4+–N)
chemical
oxygen
demand
(COD)
concentrations
lab-scale
decreased
<4
<45
mg
L−1,
respectively
while
those
test
reduced
1.51
9.15
respectively.
primary
bacteria
Pseudomonas
sp.,
Massilia
Kocuria
Bacillus
cereus
group,
Exiguobacterium
acetylicum
dominant
Chlorella.
Results
confirm
that
treat
domestic
sewage
low-C/N
ratios
meeting
China's
Pollutant
Emission
Urban
Treatment
Plants
(GB
18918-2002)
Level
1A
standard.
Studies
on
growth
degradation
kinetics
reported
(1)
specific
proliferation
rate
algal–bacterial
mixed
stemmed
joint
action
single
Chlorella,
(2)
there
was
no
mutual
inhibition
between
Chlorella
system,
(3)
responsible
for
greater
proportion
COD
removal,
(4)
removed
NH4+–N
primarily
via
adsorption,
absorption,
transformation.
This
study
demonstrates
promising
potential
practical
implementation.
Язык: Английский
The Emissions of a Compression-Ignition Engine Fuelled by a Mixture of Crude Oil and Biodiesel from the Lipids Accumulated in the Waste Glycerol-Fed Culture of Schizochytrium sp.
Energies,
Год журнала:
2024,
Номер
17(20), С. 5193 - 5193
Опубликована: Окт. 18, 2024
Microalgae
are
considered
to
be
a
promising
and
prospective
source
of
lipids
for
the
production
biocomponents
conventional
liquid
fuels.
The
available
sources
contain
lot
information
about
cultivation
biomass
amounts
composition
resulting
bio-oils.
However,
there
is
lack
reliable
verified
data
on
impact
fuel
blends
based
microalgae
biodiesel
quality
emitted
exhaust
gas.
Therefore,
main
objective
study
was
present
emission
characteristics
compression-ignition
engine
fuelled
with
blend
diesel
produced
from
accumulated
in
heterotrophic
culture
Schizochytrium
sp.
final
concentrations
microalgal
were
140.7
±
13.9
g/L
58.2
1.1
g/L,
respectively.
fatty
acids
lipid
fraction
dominated
by
decosahexaenoic
acid
(43.8
2.8%)
palmitic
(40.4
2.8%).
All
parameters
bio-oil
met
requirements
EN
14214
standard.
It
found
that
use
bio-components
allowed
lower
hydrocarbons
gas,
ranging
between
33
2
ppm
38
7
ppm,
depending
load
level
engine.
For
smoke
opacity,
emissions
range
50–100%
levels,
where
observed
content
23
4%
53
8%.
Язык: Английский