The Science of The Total Environment,
Journal Year:
2025,
Volume and Issue:
965, P. 178623 - 178623
Published: Jan. 28, 2025
Nutrient
circularity,
an
exemplification
of
circular
economy
(CE),
is
situated
in
the
waste/wastewater-agriculture
nexus.
Recycling
nutrient
elements
from
waste
streams
to
fertilizer
products
amplify
sustainable
management
resources
and
intersect
technical
biological
loops,
a
concept
developed
for
CE.
Such
complex
system
needs
be
directed
by
robust
assessment
methods
such
as
life
cycle
(LCA)
identify
trade-offs
potentials.
This
review
aims
provide
comprehensive
outlook
current
state
circularity
critical
analysis
on
applicability
LCA
CE
pathways.
Our
worked
has
summarized
pathways
including
direct
land
application,
traditionally
integrated
processes
wastewater
treatment
plants,
targeted
recycling
technologies.
Despite
restrictions
inputs
streams,
technologies
demonstrated
relative
low
selectivity.
powerful
instrument
guide
circularity;
however,
modeling
settings
can
confine
Given
that
studies
only
partially
capture
characteristics,
deliberate
methodological
selection
functional
unit,
allocation
method
impact
indicators
required
specific
aspect
under
investigation.
Lower
data
scale
limits
ability
assess
practices
requires
systemic
analyses.
Hence,
full
necessity
since
it
incorporates
potential
gains
drawbacks
material
upscaling,
process
efficiency
changes
possible
industrial
symbiosis.
The
findings
this
lay
groundwork
future
research,
pinpointing
areas
focus
within
circularity.
particularly
vital
Global
South
ensure
knowledge
transfer
prompt
action.
Sustainability,
Journal Year:
2019,
Volume and Issue:
11(14), P. 3824 - 3824
Published: July 12, 2019
The
Circular
Economy
concept
implies
the
re-design
of
existing
production
systems
in
agriculture,
by
promoting
agricultural
waste
recycling.
In
an
organic
zucchini—lettuce
rotation,
two
different
agroecological
tools
were
considered:
biofertilizer
and
presence
or
absence
green
manure
(GM+
GM−).
particular,
we
compared:
(i)
anaerobic
digestate
from
cattle
manure,
co-composted
with
vegetable
wastes,
GM
(AD
GM+);
(ii)
olive
pomace
compost,
re-composted,
(OWC
(iii)
municipal
compost
(MWC
(iv)
without
These
materials
tested
a
commercial
fertilizer
(COF
GM−)
as
positive
control.
objectives
were:
assessing
environmental
sustainability
biofertilizers
through
carbon
footprint
analysis
greenhouse
gas—GHG—emissions;
evaluating
agronomic
performance
on
energy
output
assessment.
total
emissions
was
63.9
67.0
kg
CO2
eq
Mg−1
for
AD
OWC,
respectively.
co-composting
re-composting
processes
emitted
31.4
8.4
per
Mg
ventilation
phase
composting
accounted
37.2%
emissions.
emission
values
two-crop
cycles
highest
COF
GM−
lowest
OWC
GM+,
due
to
sources.
On
average
treatments,
input
that
induced
irrigation
(37.9%).
assessment
zucchini
lettuce
highlighted
similar
all
treatments.
Our
findings
demonstrated
validity
recycle
agro-industrial
potential
practices
(GM)
mitigate
GHG
International Journal of Molecular Sciences,
Journal Year:
2022,
Volume and Issue:
23(20), P. 12165 - 12165
Published: Oct. 12, 2022
Finding
alternatives
to
diminish
plastic
pollution
has
become
one
of
the
main
challenges
modern
life.
A
few
have
gained
potential
for
a
shift
toward
more
circular
and
sustainable
relationship
with
plastics.
Biodegradable
polymers
derived
from
bio-
fossil-based
sources
emerged
as
feasible
alternative
overcome
inconveniences
associated
use
disposal
non-biodegradable
polymers.
The
biodegradation
process
depends
on
environment’s
factors,
microorganisms
enzymes,
polymer
properties,
resulting
in
plethora
parameters
that
create
complex
whereby
times
rates
can
vary
immensely.
This
review
aims
provide
background
comprehensive,
systematic,
critical
overview
this
special
focus
mesophilic
range.
Activity
depolymerization
by
extracellular
biofilm
effect
dynamic
degradation
process,
CO2
evolution
evaluating
extent
biodegradation,
metabolic
pathways
are
discussed.
Remarks
perspectives
future
research
provided
current
knowledge
gaps
if
goal
is
minimize
persistence
plastics
across
environments.
Innovative
approaches
such
addition
specific
compounds
trigger
under
particular
conditions,
biostimulation,
bioaugmentation,
natural
and/or
modified
enzymes
state-of-the-art
methods
need
faster
development.
Furthermore,
must
be
connected
standards
techniques
fully
track
process.
More
transdisciplinary
within
areas
chemistry/processing
microbiology/biochemistry
needed.
