E3S Web of Conferences,
Journal Year:
2025,
Volume and Issue:
608, P. 01010 - 01010
Published: Jan. 1, 2025
The
research
presented
in
this
article
refers
to
the
possibility
of
obtaining
biogas
anaerobic
digestion
process
from
five
wastewater
treatment
plants
sludge
Constanta
County.
Correlations
between
flowrate,
amount
volatile
substance,
and
were
done.
Considering
a
cogeneration
unit
(CHP),
thermal
electrical
energy
was
determined.
results
showed
that
obtained
is
at
least
times
higher
than
required
by
Constanța
Sud
Wastewater
Treatment
Plant.
Renewable and Sustainable Energy Reviews,
Journal Year:
2023,
Volume and Issue:
185, P. 113638 - 113638
Published: Aug. 17, 2023
The
wastewater
sector
accounts
for
up
to
7
and
10%
of
anthropogenic
CH4
N2O
emissions,
respectively.
Nowadays
treatment
plants
are
going
through
a
paradigm
shift
approach
net-zero
carbon
condition.
Numerous
ongoing
measures
have
taken
place
identify
the
sources
greenhouse
gases
minimize
footprint.
This
paper
systematically
reviews
all
known
practices
leading
towards
treatment.
gas
emissions
from
identified
footprint
quantification
tools,
such
as
reliable
models
emission
factors
compared.
direct
process
can
contribute
over
60%
in
plants,
while
around
30%
is
due
energy-related
indirect
emissions.
Therefore,
mitigation
via
optimization
energy
usage
comprehensively
described.
implantation
novel
nitrogen
removal
processes
reduce
both
consumption.
Other
techniques
source
separation
systems
potentially
allow
by
avoiding
energy-intensive
fertilizer
production.
Nutrient
recovery
methods
another
which
offer
negative
value
net
Recovering
production
promising
method
lead
reductions.
Ultimately,
achieve
full
decarbonization
any
remaining
need
be
offset,
including
chemicals
transportation.
Energies,
Journal Year:
2023,
Volume and Issue:
16(5), P. 2369 - 2369
Published: March 1, 2023
Treating
municipal
wastewater
is
a
complex
and
costly
process.
With
rising
energy
costs
sustainability
targets,
treatment
plants
(WWTPs)
are
looking
for
alternatives
to
reduce
operating
carbon
dependence.
Anaerobic
digestion
the
most
common
established
technology
used
in
WWTPs
treat
sludge
since
it
can
potentially
improve
recovery
sewage
costs,
mainly
due
generation
of
biogas.
Biogas
renewable
resource
be
several
applications,
including
heating
producing
electricity.
By
exploring
biogas
potential,
their
demands.
The
objective
this
paper
conduct
scoping
literature
review
order
provide
key
concepts
underpinning
production
utilisation
WWTPs.
In
addition,
study
aims
an
overview
current
state-of-the-art
that
may
serve
as
quick
reference
research
community,
WWTP
operators,
engineers,
definitions
general
state
technologies
around
world.
Methods
increase
production,
co-digestion,
pre-treatment,
biological
hydrogen
methanation,
reviewed,
using
also
summarised.
This
has
identified
co-digestion
was
efficient
technique
methane
yield,
while
pre-treatment
improved
biodegradability
reduced
but
enhanced
production.
Although
many
studies
have
explored
different
methods
WWTPs,
there
still
need
further
investigation,
especially
regarding
techno-economic
feasibility
these
full-scale
facilities.
challenges
related
extra
investment
increased
integrate
new
techniques
into
system.
There
great
interest
efficiency
self-sufficiency
work
provides
important
increasing
number
recently
published
papers
focus
on
improving
from
Energy Nexus,
Journal Year:
2023,
Volume and Issue:
10, P. 100202 - 100202
Published: May 8, 2023
To
overcome
the
anthropogenic
impacts
resulting
from
constant
growth
of
world
population,
industries
like
wastewater
treatment
plants
and
food
processing
must
be
adapted
to
follow
this
tendency
suppress
associated
challenges
needs
arising
global
situation.
In
context
circular
economy,
optimising
biogas
produced
in
anaerobic
digesters
during
sludge
stabilisation
is
fundamental
ensure
energy
self-sufficiency
plants.
The
co-digestion
two
or
more
substrates
a
viable
option
drawbacks
mono-digestion
improve
methane
production.
Considering
economic
viability
digestion
system,
it
major
importance
address
potential
spare
capacity
existing
reactors
by
incorporating
readily
biodegradable
wastes.
This
review
compiles
works
published
between
2015
2023
regarding
municipal
sewage
with
fruit
vegetable
wastes,
presenting
critical
analysis
gaps
future
perspectives
on
topic.
results
demonstrated
effectiveness
correct
imbalances
mono-digestion,
some
works,
wastes
obtained
higher
yields
than
sludge.
For
instance,
increment
production
varied
around
4
up
500%
when
comparing
trials.
studies,
was
13
94%
trials
only
Multi-stage
systems
enhanced
due
improvement
early
stages
process,
namely
hydrolysis
which
usually
limiting
phase.
A
significant
number
experimental
(9
out
20
studies)
were
performed
batch
easy
operation
maintenance,
revealing
gap
studies
other
types
continuous
stirred
tank
reactor,
most
used
reduced
articles
within
scope
(20)
demonstrates
that
there
still
knowledge
fill
gaps,
aiming
increase
energetic
