Energies,
Journal Year:
2022,
Volume and Issue:
16(1), P. 83 - 83
Published: Dec. 21, 2022
Anaerobic
wastewater
treatment
is
still
a
dynamically
developing
technology
ensuring
the
effective
degradation
of
organic
compounds
and
biogas
production.
As
evidenced
in
large
scale-up,
this
technological
solution
surpasses
aerobic
methods
many
aspects.
Its
advantages
stem
from
feasibility
operation
at
high
load
rate,
smaller
production
difficult-to-manage
sewage
sludge,
space
cubature
required,
high-methane
ultimately
produced.
The
exploitation
anaerobic
reactors
line
with
assumption
circular
economy,
material
recycling
by
reduced
CO2
emissions
energy
consumption,
renewable
energy.
Despite
their
unquestionable
advantages,
there
need
to
seek
novel
approaches
improve
currently
exploited
installations.
key
avenues
research
entail
improvements
stability
bioreactor
operations
enhancement
adaptability
changing
unfavorable
process
parameters.
versatility
such
systems
would
also
be
greatly
improved
increasing
nitrogen
phosphorus
removal
rates.
Attempts
have
been
made
achieve
these
goals
setting
up
separate
zones
within
bioreactors
for
individual
steps
methane
fermentation,
incorporating
active
fillings
promote
nutrient
removal,
introducing
chemical
physical
treatments.
An
interesting
use
microwave
radiation
stimulate
temperature
conditions
induce
non-thermal
phenomena,
as
enhancing
enzymatic
activity
methanogenic
microflora.
Another
prospective
approach
integrate
digesters
into
microalgal
biomass
systems.
aim
review
paper
present
thus-far
knowledge
about
treatment,
including
standard
solutions
innovative
ones,
effectiveness
which
has
corroborated
pilot-scale
Energies,
Journal Year:
2024,
Volume and Issue:
17(2), P. 335 - 335
Published: Jan. 9, 2024
The
use
of
aerobic
granular
sludge
is
a
promising
and
future-proof
solution
for
wastewater
treatment.
implementation
this
technology
requires
the
development
efficient
cost-effective
methods
management
excess
sludge.
aim
research
was
to
evaluate
effects
hydrodynamic
cavitation
on
efficiency
digestion.
Respirometric
measurements
were
performed
at
temperature
38
°C
an
initial
organic
load
5.0
gVS/L.
changes
in
properties
pretreated
biomass,
kinetics
methane
fermentation,
amount
composition
biogas
produced,
energetic
evaluation
process
carried
out.
A
significant
influence
transfer
compounds
into
dissolved
phase
demonstrated.
degree
solubilisation
37%
COD
42%
TOC.
CH4
production
from
reached
value
496
±
12
mL/gVS,
which
corresponds
increase
19.6%
compared
raw
biomass.
content
not
observed.
Strong
correlations
found
between
anaerobic
digestion
concentration
time
used.
gross
energy
yield
closely
correlated
with
CH4.
highest
comparable
values
3.12
Wh/gTS
3.18
variants
(HC)
15
min
50
min.
net
2890
kWh/MgTS
achieved
after
pretreatment.
Energies,
Journal Year:
2024,
Volume and Issue:
17(2), P. 338 - 338
Published: Jan. 9, 2024
The
supply
of
waste
glycerol
is
rising
steadily,
partially
due
to
the
increased
global
production
biodiesel.
Global
biodiesel
totals
about
47.1
billion
liters
and
a
process
that
involves
co-production
glycerol,
which
accounts
for
over
12%
total
esters
produced.
Waste
also
generated
during
bioethanol
estimated
account
10%
sugar
consumed
on
average.
Therefore,
there
real
need
seek
new
technologies
reusing
neutralizing
waste,
as
well
refining
existing
ones.
Biotechnological
means
valorizing
include
converting
it
into
gas
biofuels
via
anaerobic
fermentation
processes.
Glycerol-to-bioenergy
conversion
can
be
improved
through
implementation
technologies,
use
carefully
selected
or
genetically
modified
microbial
strains,
improvement
their
metabolic
efficiency,
synthesis
enzymes.
present
study
aimed
describe
mechanisms
glycerol-to-biogas
valorization
processes
(including
methane,
hydrogen,
biohythane)
assess
examine
progress
research
work
subject
future
avenues
research.
International Journal of Molecular Sciences,
Journal Year:
2023,
Volume and Issue:
24(5), P. 4753 - 4753
Published: March 1, 2023
The
interspecies
electron
transfer
(IET)
between
microbes
and
archaea
is
the
key
to
how
anaerobic
digestion
process
performs.
However,
renewable
energy
technology
that
utilizes
application
of
a
bioelectrochemical
system
together
with
additives
such
as
magnetite-nanoparticles
can
promote
both
direct
(DIET)
well
indirect
(IIET).
This
has
several
advantages,
including
higher
removal
toxic
pollutants
present
in
municipal
wastewater,
biomass
conversion,
greater
electrochemical
efficiencies.
review
explores
synergistic
influence
systems
on
complex
substrates
sewage
sludge.
discussions
mechanisms
limitations
conventional
process.
In
addition,
applicability
syntrophic,
metabolic,
catalytic,
enzymatic,
cation
exchange
activities
are
highlighted.
effect
bio-additives
operational
factors
explored.
It
elucidated
coupled
nanomaterial
increase
biogas–methane
potential
compared
digestion.
Therefore,
prospects
for
wastewater
require
research
attention.
International Journal of Molecular Sciences,
Journal Year:
2023,
Volume and Issue:
24(5), P. 4442 - 4442
Published: Feb. 23, 2023
Though
deemed
a
prospective
method,
the
bioconversion
of
organic
waste
to
biohydrogen
via
dark
fermentation
(DF)
has
multiple
drawbacks
and
limitations.
Technological
difficulties
hydrogen
may,
in
part,
be
eliminated
by
making
DF
viable
method
for
biohythane
production.
Aerobic
granular
sludge
(AGS)
is
little-known
spurring
growing
interest
municipal
sector;
its
characteristics
indicate
feasibility
use
as
substrate
The
major
goal
present
study
was
determine
effect
AGS
pretreatment
with
solidified
carbon
dioxide
(SCO2)
on
yield
H2
(biohythane)
production
during
anaerobic
digestion
(AD).
It
found
that
an
increasing
dose
SCO2
caused
increase
concentrations
COD,
N-NH4+,
P-PO43−
supernatant
at
SCO2/AGS
volume
ratios
from
0
0.3.
within
range
0.1–0.3
shown
enable
biogas
over
8%
content.
highest
production,
reaching
481
±
23
cm3/gVS,
obtained
ratio
This
variant
produced
79.0
6%
CH4
8.9
2%
H2.
higher
doses
applied
significant
decrease
pH
value
AGS,
modifying
bacterial
community
extent
diminished
performance.
The
characteristics
of
excess
aerobic
granular
sludge,
related
to
its
structure
and
chemical
composition,
limit
the
efficiency
anaerobic
digestion.
For
this
reason,
pre-treatment
methods
compositions
with
other
organic
substrates
are
used.
aim
research
was
determine
effects
co-digestion
pre-hydrodynamically
cavitated
sludge
waste
fats
on
methane
fermentation
under
mesophilic
thermophilic
conditions.
addition
improved
C/N
ratio
increased
value
19.
greatest
were
observed
in
digestion
at
55°C,
where
a
15%
fat
content
volatile
soilds
ensured.
This
resulted
production
1278.2±40.2
mL/gVS
biogas
889.4±29.7
CH4.
CH4
69.6±1.3%.
increase
yield
compared
pure
AGS
34.4%
40.1%,
respectively.
An
proportion
substrate
had
no
significant
effect
fermentation.
International Journal of Environmental Research and Public Health,
Journal Year:
2023,
Volume and Issue:
20(5), P. 4234 - 4234
Published: Feb. 27, 2023
The
technology
of
aerobic
granular
sludge
(AGS)
seems
prospective
in
wastewater
bio-treatment.
characteristics
as
well
compactness
and
structure
AGS
have
been
proved
to
significantly
affect
the
effectiveness
thus
far
deployed
methods
for
sewage
processing,
including
anaerobic
digestion
(AD).
Therefore,
it
is
deemed
necessary
extend
knowledge
on
possibilities
efficient
management
seek
viable
technological
solutions
methane
fermentation
this
type,
by
means
using
pre-treatment
step.
Little
known
about
method
with
solidified
carbon
dioxide
(SCO2),
which
can
be
recovered
processes
biogas
upgrading
enrichment,
leading
biomethane
production.
This
study
aimed
determine
impact
SCO2
efficiency
its
AD.
An
energy
balance
a
simplified
economic
analysis
process
were
also
carried
out.
It
was
found
that
an
increasing
dose
applied
increased
concentrations
COD,
N-NH4+,
P-PO43−
supernatant
range
SCO2/AGS
volume
ratios
from
0.0
0.3.
No
statistically
significant
differences
noted
above
latter
value.
highest
unit
yields
production,
reaching
476
±
20
cm3/gVS
341
13
cm3/gVS,
respectively,
obtained
variant
ratio
experimental
produced
positive
net
gain,
1047.85
kWh/ton
total
solids
(TS).
use
higher
than
0.3
doses
reduce
pH
(below
6.5),
thereby
directly
diminishing
percentage
methanogenic
bacteria
bacterial
community,
turn
contributed
reduced
CH4
fraction
biogas.
