Environmental Technology,
Journal Year:
2024,
Volume and Issue:
46(6), P. 848 - 862
Published: June 26, 2024
This
study
investigated
the
effects
of
different
aeration
intensities
on
organic
matter
(OM)
degradation,
greenhouse
gas
emissions
(GHG)
as
well
humification
during
plant
residue
composting.
Three
intermittent
0.084
(Tlow),
0.19
(Tmedium)
and
0.34
(Thigh)
L
min-1kg-1
DM
with
30
min
on/30
off
were
conducted
a
lab-scale
composting
experiment.
Results
showed
that
OM
mineralization
in
Thigh
was
more
evident
than
Tlow
Tmedium,
resulting
highest
humic
acid
content.
Humic
content
Tmedium
15.7%
18.5%
higher
Tlow.
The
average
O2
concentration
4.9%,
9.5%
13.6%
for
Tlow,
Thigh.
Compared
Thigh,
reduced
CO2
N2O
by
18.3%-39.6%
72.4%-63.9%,
but
CH4
emission
But
total
GHG
lowest
Linear
Discriminant
Analysis
Effect
Size
analysis
core
bacteria
within
mainly
belonged
to
Anaerolineaceae,
which
significantly
negatively
correlated
CH4.
Thermostaphylospora,
Unclassified_Vicinamibacteraceae
Sulfurifustis
identified
these
genus
postively
emissions.
Redundancy
orgnic
carbon,
electrical
conductivity
key
factors
affecting
evolution
bacterial
community.
Environmental Technology & Innovation,
Journal Year:
2023,
Volume and Issue:
32, P. 103290 - 103290
Published: July 13, 2023
The
effects
of
two
typical
phosphorus-containing
additives
(i.e.
phosphogypsum
and
superphosphate)
on
carbon
transformation
during
pig
manure
composting
were
investigated.
Three
addition
strategies,
including
10%
as
well
2.5%
superphosphate
(based
dry
mass)
designed
with
same
dosage
or
phosphorus
content.
Results
showed
that
all
strategies
could
alter
organic
biotransformation
to
reduce
loss
composting.
Adding
restrain
microbial
activities
retard
biodegradation,
which
thus
reduced
dioxide
methane
emission
humic
acid
(HA)
formation.
Compared
these
high
additives,
promote
the
conversion
unstable
fulvic
(FA)
stable
HA
aromaticity
for
humification.
In
addition,
was
more
favorable
CH4
given
its
low
maintain
suitable
thermophilic
period.
Thus,
recommended
accelerate
humification
in
practice.
Environmental Technology & Innovation,
Journal Year:
2024,
Volume and Issue:
33, P. 103530 - 103530
Published: Jan. 4, 2024
Aiming
at
the
problems
of
low
bioconversion
efficiency
and
serious
secondary
pollution
urban
perishable
waste
(PW),
fermentation
materials
reflux
was
applied
in
PW
composting
to
investigate
effects
modes
on
emission
ammonia
(NH3),
methane
(CH4)
nitrous
oxide
(N2O)
this
study.
Before
that,
20%
determined
be
optimal
ratio
terms
indicators
gaseous
emissions
used
current
experiment.
Five
treatments
including
CK
(no-reflux),
T1
(reflux
mature
compost
(MC),
completely
mixed
with
initial
material),
T2
MC,
15%
for
mixing,
5%
surface
covering),
T3
10%
covering)
T4
thermophilic
(TC)
TC
MC
covering).
reduced
NH3
CH4
by
52.9%
40.11%,
as
a
result
high
temperature
inhibition
methanogens
former
stage.
While
most
N2O
56.85%
through
restraint
denitrification.
In
conclusion,
introduction
can
accelerate
process,
improve
maturity,
mitigate
greenhouse
gas
(GHG)
ranging
from
27.61%
58.05%,
which
provide
theoretical
technical
support
rapid
future.
