To
investigate
the
impact
of
sulfate
(SO42-)
on
performance
bioelectrochemical
up-flow
anaerobic
sludge
blanket
(BE-UASB),
COD/SO42-
ratio
sulfate-containing
methanolic
wastewater
was
gradually
decreased
from
20
to
3.
The
results
showed
that
BE-UASB
maintained
higher
COD
and
SO42-
removal
(i.e.,
91%
70%,
respectively)
with
methane
production
rate
278.7
mL/Lreactor/d
at
10
5,
ensuring
efficient
energy
recovery.
Sulfidogenesis
enabled
re-granulation
while
bioelectrocatalysis
further
contributed
growth/proliferation
biomass
interwoven
filaments,
rods,
spherical
microorganisms.
16S
rRNA
gene
analysis
demonstrated
promoted
diversity
methane-producing
archaea
(MPA),
including
Methanomethylovorans,
Methanosaeta,
Candidatus_Methanofastidiosum,
Methanobacterium.
Sulfate-reducing
bacteria
(SRB),
mainly
comprising
G_norank_f_Syntrophobacteraceae,
Desulfomonile,
Syntrophobacter,
tended
be
enriched
bioelectrodes,
which
not
only
eased
competition
MPA
but
also
achieved
simultaneous
in
synergy
MPA.
Biomass,
Год журнала:
2022,
Номер
2(4), С. 374 - 411
Опубликована: Дек. 13, 2022
Vinasse
management
in
biorefineries
bears
a
burden
for
sugarcane
industries.
Despite
its
high
potassium-related
fertilizer
potential,
series
of
negative
environmental
impacts
is
expected
to
occur
long-term
soil
applications
vinasse
through
fertirrigation.
Conversely,
biodegradable
organic
content
characterizes
as
potential
substrate
bioresource
and
bioenergy
recovery
from
numerous
(bio)technological
perspectives.
This
review
presents
the
alternative
approaches
proposed
Brazil,
with
special
attention
dedicated
role
anaerobic
digestion
core
conversion
step.
The
suitability
applying
phase
separation,
i.e.,
separation
fermentation
methanogenesis
sequential
reactors,
discussed
detail.
Laboratory
full-scale
experiences
were
considered
discuss
energetic
biogas
generation.
With
national
installed
capacity
up
1603
MW,
energy
could
replace
half
coal-derived
electricity
Brazil.
Meanwhile,
investing
obtain
soluble
metabolites
provide
more
than
10
g
L−1
(iso)butyrate.
first
addressing
use
that
discusses
far
beyond
conventional
production,
encourages
rational
raw
material
bioprocesses,
either
short-
or
scenarios.
Water,
Год журнала:
2024,
Номер
16(23), С. 3344 - 3344
Опубликована: Ноя. 21, 2024
The
production
of
volatile
fatty
acids
(VFAs)
through
the
acidogenic
fermentation
wastewater
is
an
emerging
technology
that
requires
further
research
to
optimize
operational
variables
for
specific
substrates.
Cassava
wastewater,
which
a
byproduct
cassava
sour
starch
extraction
process,
has
been
minimally
studied
regarding
its
potential
VFA
fermentation.
Batch
reactors
were
used
evaluate
effects
substrate-to-microorganism
(S/M)
ratio
and
temperature
on
from
wastewater.
results
showed
no
statistically
significant
differences
between
evaluated
S/M
ratios.
maximum
total
concentration
observed
was
2214.64
mg
acetic
acid
(HAc)/L
(0.32
gCODVFA/gCOD),
achieved
at
4
gCOD/gVS.
This
predominantly
composed
(42.7%),
followed
by
butyric
(30.1%)
propionic
(24.6%),
with
minor
quantity
isovaleric
(2.6%).
statistical
analysis
variable
conditions.
VFAs
2650.19
mgHAc/L
(0.45
gCODVFA/gCOD)
34
±
1
°C,
(40.9%),
(29.8%),
(29.3%)
as
primary
metabolites.
shows
promise
substrate
production,
warranting
evaluation
in
continuous
reactors.
Research Square (Research Square),
Год журнала:
2023,
Номер
unknown
Опубликована: Авг. 8, 2023
Abstract
Tequila
vinasse,
a
by-product
generated
during
agave
fermentation,
is
wastewater
characterized
by
its
dark
color
and
composition,
which
includes
water,
alcohol,
sugars,
phenolic
compounds,
proteins,
among
others.
Its
high
chemical
oxygen
demand
(COD)
pH
levels
classify
it
as
hazardous
to
the
soil,
plants,
aquatic
organisms,
requiring
development
of
treatment
strategies
or
proper
disposal
methods.
It
worth
noting
that
vinasse
contains
numerous
compounds
can
be
recovered
valorized.
In
this
study,
different
concentrations
tequila
(100%,
70%,
50%)
were
subjected
10-day
with
Trametes
sanguineus
.
Significant
reductions
in
color,
content,
COD
observed
across
all
conditions,
approximately
70%
decolorization
60%
reduction
content
achieved.
Among
conditions
tested,
50%
concentration
exhibited
highest
laccase
production,
reaching
1,779
U/L
on
5th
day
cultivation,
while
laccases
also
detected
other
conditions.
Subsequently,
potential
treated
for
germination
seedling
growth
was
assessed.
removed
from
resulting
supernatant
applied
directly
seeds.
Lettuce
tomato
seeds
employed
these
assays,
both
demonstrated
seed
rates
ranging
50–80%,
respectively.
Notably,
without
T.
did
not
exhibit
any
germination.
Additionally,
assays
conducted,
revealing
supported
lettuce
root-related
features
comparable
control.
Valorization
agroindustrial
waste
presents
viable
approach
obtaining
value-added
products.
