Environmental Engineering Science,
Journal Year:
2024,
Volume and Issue:
41(3), P. 120 - 129
Published: Feb. 20, 2024
Anaerobic
digestion
of
organic
waste
generates
nutrient-rich
digestate,
which
poses
challenges
for
effective
utilization
due
to
its
complex
structure.
Ozonation
has
emerged
as
an
environmentally
friendly
treatment
method
breaking
down
recalcitrant
materials.
In
addition,
co-digestion
been
found
enhance
methane
production.
This
study
employed
ozone
on
followed
by
mixing
it
with
primary
and
excess
sludge
in
sequencing
batch
tests.
Results
showed
that
production
from
treated
anaerobic
digestate
(ODI)
(83.20
mL/g
VSS)
was
101.2%
higher
compared
untreated
(41.34
VSS).
Co-digestion
further
improved
production,
ODI
combined
producing
180.51
VSS
152.64
VSS,
respectively,
exceeding
alone
combining
(152.64
resulted
6.5%
(143.29
Microbial
community
structure
analysis
revealed
the
enrichment
key
flora
facilitating
matter
conversion
during
digestion.
conclusion,
integrating
pretreatment
presents
environmentally-friendly
approach
reuse.
Biotechnology and Bioengineering,
Journal Year:
2022,
Volume and Issue:
119(11), P. 3007 - 3021
Published: July 28, 2022
Cell
lysis
is
an
essential
step
in
many
studies
related
to
biology
and
medicine.
Based
on
the
scale
medium
that
cell
carried
out,
there
are
three
main
types
of
lysis:
(1)
cells
surrounding
environment,
(2)
isolated
or
cultured
cells,
(3)
single
lysis.
Conventionally,
several
methods
have
been
developed,
such
as
freeze-thawing,
bead
beating,
incursion
liquid
nitrogen,
sonication,
enzymatic
chemical-based
approaches.
In
recent
years,
various
novel
technologies
employed
develop
new
The
aim
this
field
introduce
more
precise
efficient
tools
reduce
costs
procedures.
Nanostructure-based
methods,
acoustic
oscillation,
electrical
current,
irradiation,
bacteria-mediated
lysis,
magnetic
ionic
liquids,
bacteriophage
genes,
monolith
columns,
hydraulic
forces,
steam
explosion
some
examples
newly
developed
methods.
Besides
significant
advances
field,
still
challenges
must
be
further
improved.
EFB Bioeconomy Journal,
Journal Year:
2022,
Volume and Issue:
2, P. 100026 - 100026
Published: March 15, 2022
Being
an
inevitable
byproduct
of
the
operation
wastewater
treatment
plants
(WWTPs),
sewage
sludge
may
cause
serious
environmental
problems.
Thus,
proper
and
management
such
waste
is
currently
a
challenge
great
importance.
Due
to
significant
concentration
various
contaminants,
direct
application
in
agriculture
often
limited.
Nevertheless,
this
rich
valuable
compounds,
among
which
humic
substances
(HS)
are
recognized
be
one
most
important.
A
plethora
studies
have
shown
extensive
potential
HS.
However,
literature
data
also
evidenced
that
HS
constitute
obstacles
for
efficient
management.
The
current
review
article
discusses
fate
WWTPs.
Moreover,
necessity
removing
recovering
compounds
from
systems
was
highlighted.
Attention
drawn
beneficial
features
avenues
their
possible
applications.
Drying Technology,
Journal Year:
2022,
Volume and Issue:
40(15), P. 3049 - 3063
Published: Feb. 27, 2022
Sewage
sludge
is
an
inevitable
by-product
of
biological
wastewater
treatment
process
and
contains
various
toxic
substances
such
as
pathogens,
heavy
metals
organic
contaminants,
which
may
cause
serious
pollution
risks
without
appropriate
disposals.
Dewatering
drying
technology
play
significant
roles
in
minimizing
volume,
facilitating
transportation,
increasing
calorific
value
reducing
the
leachate
production
landfill
sites.
Various
new
technologies
are
emerging
existing
ones
always
evolving
because
sharp
growth
sewage
last
decade.
This
paper
presents
a
comprehensive
review
on
recent
advances
related
to
dewatering
sludge.
The
influencing
factors
addressed
out
firstly.
And
then
conditioning
methods
improve
performance
summarized
compared
terms
applicable
occasions,
material
consumption,
energy
environmental
impacts
etc.
classified
into
common,
deep
high-dry
based
degree
moisture
content,
method
divided
convective
drying,
conduction
radiation
other
drying.
present
reviewed
order
provide
useful
guidelines
for
disposal.
future
demands
opportunities
pointed
from
industrial
perspective.
Ultrasonics Sonochemistry,
Journal Year:
2023,
Volume and Issue:
102, P. 106736 - 106736
Published: Dec. 16, 2023
Sludge
dewatering
plays
a
critical
role
in
the
efficient
and
cost-effective
management
of
wastewater
treatment
plants.
Ultrasonic
has
emerged
as
promising
technique
for
improving
processes.
This
study
aims
to
evaluate
impact
ultrasonic
on
sludge
characteristics.
A
series
experiments
were
conducted
characteristics
under
treatment.
Experimental
data
was
collected,
effects
parameters
efficiency
analyzed.
Ultrasound
capacity
disintegrate
flocs,
liberate
tightly
bound
water,
enhance
capabilities.
The
application
ultrasound
leads
breakdown
which
facilitates
substantial
amount
organic
acids
or
carbonates.
This,
turn,
modifies
pH
value
sludge.
Additionally,
induces
instantaneous
high
temperature
pressure
within
liquid
phase,
consequently
elevating
slurry.
Optimum
energy
density
duration
exist.
For
samples
analyzed
this
investigation,
it
determined
that
optimal
is
9.8
W,
while
30
s.
Excessively
escalating
sound
prolonging
may
yield
unfavorable
outcomes
terms
effectiveness.
To
dewatering,
crucial
select
appropriate
demonstrates
positive
findings
provide
valuable
insights
into
potential
technology
enhancing
dewatering.
Chemosphere,
Journal Year:
2023,
Volume and Issue:
347, P. 140695 - 140695
Published: Nov. 15, 2023
This
study
presents
the
excess
sludge
minimisation
in
a
Membrane
Bioreactor
(MBR)
system
by
an
Oxic
Settling
Anaerobic
(OSA)
process.
The
pilot
plant
was
fed
with
real
wastewater
and
OSA
operated
two
different
hydraulic
retention
times
(HRT),
respectively
4
(Period
II)
6
h
III)
compared
to
MBR
I).
Multiple
parameters/variables
were
monitored:
minimisation,
nitrogen
carbon
removal,
membrane
fouling,
biokinetic
behaviour
through
respirometry.
With
respect
current
literature,
greenhouse
gas
emissions
also
here
monitored,
often
neglected.
Results
demonstrated
that
combining
systems
can
significantly
reduce
production
(89.7%,
Period
III
59.7%
II,
However,
presented
better
PO4–P
removal
efficiencies
but
worse
performances
other
parameters
(COD,
NH4
Total
Nitrogen).
No
substantial
variation
fouling
obtained
over
experimental
periods.
Finally,
HRT
increase
anaerobic
reactor
promoted
N2O–N
inside
unaerated
reactors,
highlighting
need
for
trade-off
between
GHG
emission.
Journal of Environmental Management,
Journal Year:
2024,
Volume and Issue:
354, P. 120345 - 120345
Published: Feb. 23, 2024
This
study
presents
the
effects
on
carbon
and
nutrient
removal,
membrane
fouling
greenhouse
gas
(GHG)
emissions
of
an
Oxic-Settling-Anaerobic
(OSA)
–
Membrane
Bioreactor
(MBR)
pilot
plant
fed
with
real
wastewater.
The
influence
three
sludge
return
internal
ratios
(IR)
was
investigated
by
testing
45,
75
100%.
results
showed
that
increase
IR,
biological
production
substantially
decreased
85.8%
due
to
combination
cell
lysis
endogenous
metabolism.
However,
a
worsening
ammonia
removal
efficiencies
occurred
(from
94.5
%
84.7
IR
value
45
100%,
respectively)
mostly
release
caused
under
anaerobic
conditions.
N2O
emission
factor
increased
rise
(namely,
from
2.17%
2.54%
total
influent
nitrogen).
In
addition,
variation
footprint
(CF)
(0.78,
0.62
0.75
kgCO2eq
m−3
100%
mainly
different
energy
consumption
oxidation
during
periods.
study's
relevance
is
address
optimal
operating
conditions
in
view
reducing
production.
this
light,
need
identify
trade-off
between
advantages
disadvantages
increasing
GHG
must
be
identified
future.
