Enzymatic Activity in the Anaerobic Co-Digestion of Cavitated Coffee Waste and Sewage Sludge
Energies,
Journal Year:
2025,
Volume and Issue:
18(1), P. 187 - 187
Published: Jan. 4, 2025
Hydrodynamic
cavitation
(HDC)
as
a
pre-treatment
method
is
innovative
and
has
potential
for
wide-scale
industrial
applications.
The
novelty
of
this
research
involves
evaluating
the
enzymatic
activity
in
anaerobic
co-digestion
(AcD)
hydrodynamically
cavitated
coffee
waste
(CW)
municipal
sewage
sludge
(SS)
well
its
influence
on
AcD
performance.
effectiveness
was
assessed
basis
changes
physico-chemical
composition
feedstock
digestate
biogas/methane
yield,
attention
paid
to
effect
enzyme
activity,
including
that
β-Glucosidases
(β-Glu),
protease
(PR),
urease
(URE),
phosphomonoesterases
acid
(ACP)
alkaline
(ALP).
Moreover,
heavy
metal
content
after
CW
SS
were
investigated.
Comparing
digestate,
we
observed
URE,
ACP
ALP
activities
4.5
11
times
higher
than
digestate.
when
using
30
min,
highest
both
occurred.
results
indicated
relationship
between
β-Glu
biogas
yield
showed
strongest
positive
correlation
(r
=
0.98
at
p
≤
0.05).
At
same
time,
PAC,
PAL,
URE
PR
methane
0.05
observed.
obtained
allow
us
conclude
that,
future,
such
could
be
used
bio-fertilizer
improve
degraded
soil
activate
microbial
populations.
Language: Английский
Overcoming the Difficulties of Thermophilic Co-Digestion of Sewage Sludge and Beverage Industry Wastes in the Presence of Zeolite
Energies,
Journal Year:
2025,
Volume and Issue:
18(8), P. 2085 - 2085
Published: April 17, 2025
The
thermophilic
anaerobic
bioconversion
of
various
wastes
is
still
challenging,
mainly
due
to
process
instability
and
economic
profitability.
This
group
includes
orange
(OWs)
brewery
spent
grain
(BSG),
the
main
by-products
generated
by
beverage
industry.
In
this
study,
a
strategy
allowing
for
improving
methane
production
multicomponent
co-digestion
sewage
sludge
(SS),
OW,
BSG
was
proposed.
To
overcome
difficulties
in
those
wastes,
application
natural
zeolite
(Z),
i.e.,
clinoptilolite,
experiment
performed
batch
mode
at
temperature
55
°C.
Four
experimental
series
were
conducted
with
differing
feedstock
compositions,
one
which
control
supplied
only
SS.
As
compared
control,
OW
BSG,
decreased
20%
13%,
respectively.
turn,
significant
improvements
achieved
presence
Z.
most
beneficial
results
observed
reactor
SS,
Z,
characterized
yield
420.2
mLCH4/gVS,
an
increase
almost
14%
as
control.
case,
significantly
improved
stability
parameters,
well
inhibitors,
limonene
phenols,
achieved.
It
also
enhanced
energy
balance
69%,
Language: Английский