Biodegradation,
Journal Year:
2022,
Volume and Issue:
34(1), P. 1 - 20
Published: Dec. 4, 2022
Oily
sludge
is
a
residue
from
the
petroleum
industry
composed
of
mixture
sand,
water,
metals,
and
high
content
hydrocarbons
(HCs).
The
heavy
oily
used
in
this
study
originated
Colombian
crude
oil
with
density
low
American
Petroleum
Institute
(API)
gravity.
residual
waste
processing
was
subject
to
thermal
centrifugal
extraction,
resulting
very
viscosity.
Biodegradation
total
(TPH)
tested
microcosms
using
several
bioremediation
approaches,
including:
biostimulation
bulking
agents
nutrients,
surfactant
Tween
80,
bioaugmentation.
Select
HC
degrading
bacteria
were
isolated
based
on
their
ability
grow
produce
clear
zones
different
HCs.
Degradation
TPH
monitored
gravimetrically
gas
chromatography
(GC).
removal
all
treatments
ranged
between
2
67%,
regardless
addition
microbial
consortiums,
amendments,
or
surfactants
within
parameters.
results
demonstrated
that
presents
greater
challenges
achieve
regulatory
requirements.
Additional
physicochemical
analysis
remediate
recalcitrant
material
may
be
required
desirable
degradation
rate.
Environmental Technology & Innovation,
Journal Year:
2022,
Volume and Issue:
26, P. 102319 - 102319
Published: Jan. 17, 2022
The
influence
of
the
concentration
total
petroleum
hydrocarbons
(TPHs)
on
competition
between
isolated
oil-degrading
bacteria
(ODB)
and
finished
compost
microorganisms
(FCM)
was
investigated
in
composting
bioreactors
over
12
weeks
period.
First,
batch
tests
were
performed
Bushnell–Haas
medium
(BHM)
to
evaluate
biodegradation
activities
six
native
ODB
from
sludge
(PS).
Then,
added
containing
10
30
g/kg
TPHs.
Based
BHM
results,
highest
degradation
efficiency
crude
oil
(1%–3%
concentration)
determined
be
72%–75%
at
pH
7
after
days.
In
only
ODB,
TPHs
removal
rates
86%–92%
weeks.
Although
lower
(73%–89%)
both
FCM
indicated
a
slight
them,
still
effective
presence
especially
greater
concentrations
Despite
fact
that
addition
(FC)
PS
changed
microbial
composition
bioreactors;
populations
exhibited
little
variation
during
process.
This
study
alone
or
FCM,
effectively
degraded
Frontiers in Microbiology,
Journal Year:
2023,
Volume and Issue:
13
Published: Jan. 4, 2023
An
atrazine-utilizing
bacterium,
designated
as
ZY,
was
isolated
from
agricultural
soil
and
identified
Paenarthrobacter
ureafaciens
.
The
P.
ZY
demonstrated
a
significant
degradation
capacity
of
atrazine,
with
the
efficiency
12.5
mg
L
−1
h
in
liquid
media
(at
pH
7,
30°C,
atrazine
level
100
).
contained
three
atrazine-degrading
genes
(i.e.,
trz
N,
atz
B,
C)
could
metabolize
to
form
cyanuric
acid,
which
showed
lower
biotoxicity
than
parent
predicted
by
Ecological
Structure
Activity
Relationships
model.
A
laboratory-scale
pot
experiment
performed
examine
inoculation
investigate
its
effects
on
native
microbial
communities.
results
exhibited
that
conductive
increased
total
phospholipid
fatty
acids
at
50,
70,
kg
By
using
high-throughput
sequencing
analysis,
Frateuria
,
Dyella
Burkholderia-Caballeronia-Paraburkholderia
were
considered
most
important
indigenous
microorganisms
due
their
relative
abundances
positively
correlated
rate.
In
addition,
also
abundance
genus
Streptomyces
Bacillus
indicating
there
may
be
synergic
relationship
between
them
process
degradation.
Our
work
provides
new
insight
inoculums
atrazine.
