Anaerobic
digestion
can
produce
biogas
while
treating
waste,
but
the
process
often
has
difficulties
such
as
acid
inhibition
and
ammonia
inhibition.
The
application
of
bioaugmentation
to
anaerobic
solve
these
problems.
Bacillus
subtilis
was
added
regulate
microbial
community
structure
digestion.
Results
indicated
that
1.12
g
had
best
effect,
with
cumulative
hydrogen
methane
yields
reaching
114.00
mL/g
VS
410.84
VS,
respectively,
which
were
35.88%
37.54%
higher
than
control
group.
also
maximum
proportion
methane,
84.68%.
According
analysis,
addition
significantly
changed
structure,
its
relative
abundance
increased
in
production
stage,
thereby
raising
volatile
fatty
acids
(VFAs)
content.
stage.
It
Bacillus,
Methanosarcina,
Limnochordia,
Syntrophomonas,
Lentimicrobium
Hydrogenispora,
enhancing
substrate
decomposition
efficiency
increasing
production.
results
this
study
suggest
help
both
two-stage
processes.
Bioresource Technology,
Journal Year:
2023,
Volume and Issue:
377, P. 128920 - 128920
Published: March 18, 2023
Added-value
chemicals
production
via
food
waste
(FWs)
valorization
using
open-mixed
cultures
is
an
emerging
approach
to
replace
petrochemical-based
compounds.
Nevertheless,
the
effects
of
operational
parameters
on
product
spectrum
remain
uncertain
given
wide
number
co-occurring
species
and
metabolisms.
In
this
study,
identification
58
metagenome-assembled
genomes
their
investigation
assessed
effect
slight
pH
variations
microbial
dynamics
corresponding
functions
when
FWs
were
subjected
anaerobic
fermentation
(AF)
in
1-L
continuous
stirred
tank
reactors
at
25
°C.
The
initial
6.5
promoted
a
community
involved
acetate,
butyrate
ethanol
production,
mediated
by
Bifidobacterium
subtile
IE007
Eubacteriaceae
IE027
as
main
species.
A
decrease
6.1
shaped
that
resulted
caproate
H2
increasing
relevance
IE037
role.
This
study
elucidated
strong
outputs
minimal
take
place
AF.
In
China,
the
co-landfill
of
stabilized
MSW
incineration
fly
ash
(FA)
and
raw
is
a
historical
legacy
issue,
which
can
affect
stability
heavy
metals
in
FA
stabilization
process
MSW.
This
study
investigates
recirculating
semi-aerobic
co-landfilling
system
FA,
focusing
on
landfill
gas
emissions
metal
leaching.
Three
columns
with
varying
recirculation
frequencies
were
established
for
simulated
experiments.
Results
indicate
that
leachate
enhances
microbial
activity
but
causes
accumulation
NH4+-N
COD,
inhibiting
organic
matter
decomposition.
Recirculation
frequency
does
not
significantly
CO2
production,
peak
concentrations
S1
natural
rainfall,
S2
weekly
recirculation,
S3
bi-daily
at
245
days
being
60.95%,
58.42%,
61.86%,
respectively.
Compared
delayed
exerted
positive
effect
mitigating
Cd
Pb
Heavy
leaching
driven
by
pH
fluctuations,
carbonation,
frequency.
Early
acidic
conditions
increase
release,
while
certain
degree
carbonation
stabilizes
Pb,
Ni,
Cr.
However,
Zn
Cu
mobility
depends
balance
between
acid
carbonation.
contamination
reduces
metabolic
production
altering
communities.
These
findings
highlight
complexity
pollutant
dynamics
offer
insights
optimizing
strategies
to
mitigate
environmental
risks
disposing
