Leipzig, 28.03.2017
Technical workshop on biomethane production in small and medium scale units
Pre-treatment:
Ultrasound and hydrodynamic disintegrator
Agata Głowacka-Gil
Marcin Zieliński
Marcin Dębowski
Paulina Rusanowska
Magdalena Zielińska
Agnieszka Cydzik-Kwiatkowska
University of Warmia and Mazury in Olsztyn
Faculty of Environmental Science
Department of Environmental Engineering
© Paul Trainer (DBFZ)
© Andrei Merkulov / Fotolia.com
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
© Michael Schlüter (DBFZ)
1
Leipzig, 28.03.2017
Technologies which are mainly focused in Record Biomap
Pre-treatment technologies (UWM):
Ultrasound disintegration
Hydrodynamic disintegration
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
2
Leipzig, 28.03.2017
The aim of the experiments was to determine the influence of
ultrasound disintegration on methane fermentation process
efficiency. The experiments were carried out in technical scale
at the Agriculture Biogas Plant in Bałdy. The research
concentrated on the quantity and quality of biogas produced.
Ultrasound pre-treatment – laboratory scale
Dose
of energy [ kJ/l]
Temperature [°C]
Time [min]
50
100
150
200
250
300
350
400
450
500
23,1
30,0
44,8
51,3
44,3
52,5
56,5
69,0
71,3
67,2
4,41
8,82
13,07
15,81
21,23
25,95
31,29
42,47
47,71
54,14
The Didactic
and Research Station
in Bałdy
Power of ultrasound - 400 W
Frequency
- 24 kHz
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
Leipzig, 28.03.2017
Dose
of energy [ kJ/l]
Temperature [°C]
Time [min]
50
100
150
200
250
300
350
400
450
500
23,1
30,0
44,8
51,3
44,3
52,5
56,5
69,0
71,3
67,2
4,41
8,82
13,07
15,81
21,23
25,95
31,29
42,47
47,71
54,14
The basis for the construction and operation of
the ultrasonic disintegration system used at
technical scale was the results obtained in
laboratory conditons. 15 min was found to be
the optimum hydraulic retention time in the
ultrasound desintegration area.
l/kg o.d.m.
800
700
600
500
400
0
50
100 150 200 250 300 350 400 450 500
Biogas production after ultrasound kJ/l
pretreatment
%
Ultrasound pre-treatment – laboratory
scale
60,0
58,0
56,0
54,0
52,0
50,0
48,0
46,0
44,0
42,0
40,0
0
50
100 150 200 250 300 350 400 450 500
kJ/l
Methane content in produced
biogas
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
Leipzig, 28.03.2017
Ultrasound disintegrator
The facility for organic substrate
disintegration with ultrasound consists of 5
tubular segments with square crosssections. The size of a single segment is 96
x 96 x 850 mm. The active volume of one
segment is 8 liters. Segments are made of
acid-proof steel. It cycles automatically,
using a circulating pump for feeding and
emptying.
Technical Readiness Level -7
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
Leipzig, 28.03.2017
Ultrasound disintegrator characteristics:
• Power:
• Converters:
• Frequency:
• Active volume of disintegrator:
• Number of working cycles per day (feeding/disintegration/discharge):
• Time for a single disintegration cycle (feeding/disintegration/discharge):
• Total time of disintegration:
• Volume of disintegrated substrate:
• Required daily quantity of energy:
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
10 kW
n = 60
24 kHz
40 l
13
60/900/60 s
3.5 h/d
500 l/d
35 kWh/d
Leipzig, 28.03.2017
DISINTEGRATOR
Ultrasound disintegrator location in technological system
of Small Biogas Plant in Bałdy
BEFORE INLET OF
ORGANIC
SUBSTRATE TO
MAIN FERMENTER
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
Leipzig, 28.03.2017
Substrate Preparation Tank
The active volume
Vcz = 2.5 m3
Main Fermentation Tank
The active volume Vcz = 20.9 m3
Post-fermentation Tank
The active volume Vcz = 20.9 m3
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
Leipzig, 28.03.2017
Technological parameters
Hydraulic Retention Time:
Substrate Preparation Tank (Hydrolyzer):
≈ 5 days
Main Fermentation Tank:
≈ 42 days
Post Fermented Tank:
≈ 42 days
Total HRT:
≈ 89 days
Organic Load Rate:
Organic dry mass of substrates:
Mt o.d.m.
≈ 53 kgo.d.m./d
Total volume of fermentation tank:
V
≈ 21 m3
OLR:
A
≈ 2.5 kg
Temperature:
3
o.d.m./m
35°C
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
xd
Leipzig, 28.03.2017
Biogas and energy production
Biogas
Organic dry
production
mass [kg
3
[dm /kg
o.d.m../day]
o.d.m.]
Biogas
production
[m3/d]
Methane
content
[%]
Daily
production
of total
energy
[kWh/d]
Energy
input
[kWh/d]
Energy
output
[kWh/d]
Variant
Pretreatment
I
Without
disintegration
of substrates
300
53
15.9
52.3
76
20
56
II
Ultrasound
disintegration
375
53
19.8
53.0
97
45
52
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
Leipzig, 28.03.2017
Hydrodynamic pre-treatment – laboratory scale
The hydrodynamic cavitation pump was constructed of cylindrical rotor
fixedly attached to the shaft and placed in 0.25 L tank. The rotor was turned
by electric motor (4 kW, 2800 rpm). A feedstock inlet port was placed at the
bottom of the tank, while the outlet port was on the top. As the feedstock
injected in the tank travelled across the rotor and was mixed by centrifugal
force, areas of vacuum were generated within the liquid from its own
turbulence, expansion and compression resulted into cavitation
Dose
of energy [ kJ/l]
Temperature [°C]
Time [min]
0
24,2
32,5
37,5
45,5
50,0
48,5
57,5
64,5
67,0
72,0
0
4,02
8,29
13,08
18,03
22,4
27,43
32,34
37,10
41,35
50
100
150
200
250
300
350
400
450
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
Leipzig, 28.03.2017
HYDRODYNAMIC disintegrator characteristics:
•
power-16 kW,
•
rotating speed – 2800 times/min,
•
active volume-25 l,
•
number of working cycles throughout a day(filling/disintegration/discharge) - 20,
•
duration of one disintegration cycle (filling/disintegration/discharge) - 60/600/60 s.
Technical Readiness Level -5
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
Leipzig, 28.03.2017
HYDRODYNAMIC
DISINTEGRATOR
BEFORE INLET OF
HYDRODYNAMIC DISINTEGRATOR
location in technological system of Small Biogas Plant in
Bałdy
ORGANIC
SUBSTRATE TO
MAIN FERMENTER
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
Leipzig, 28.03.2017
Biogas and energy production
Biogas
production
[dm3/kg
o.d.m.]
Organic dry
mass [kg
o.d.m../day]
Biogas
production
[m3/d]
Methane
content
[%]
Daily
production
of total
energy
[kWh/d]
Energy
input
[kWh/d]
Energy
output
[kWh/d]
Variant
Pretreatment
I
Without
disintegration
of substrates
300
53
15.9
52
76
20
56
II
Hydrodynamic
disintegration
350
53
18.5
54
91.5
30.5
61.5
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
Leipzig, 28.03.2017
Conculsions
64
62
60
kWh/d
58
56
54
52
50
48
46
withouth disintegration of
substrates
Ultrasound disintegration
Hydrodynamic disintegration
Net energy output [kWh/d]
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
15
Leipzig, 28.03.2017
Ultrasound disintegrator
„+”
• High biogas productivity
• High efficiency of organic matter biodegradation
• Device useful for the preatretment of high hydrated biomass
„-”
• High expenditures in relation to energy produced which is need to
pretreat feedstock with high dry matter content
• Additional studies are needed for using the device to pretreat
feedstock with high dry matter content
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
Leipzig, 28.03.2017
Hydrodynamic disintegrator
„+”
• Ensure a high net energy output
• Device is currently tested within the project about
disposal of food industry and sewage treatment plants
wastes
„-”
• Device has not been tested in long-term technical scale
• High purity feedstock is required
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
17
Leipzig, 28.03.2017
Agata Głowacka-Gil
thank you very much!
Marcin Zieliński, [email protected]
Marcin Dębowski,[email protected]
Paulina Rusanowska
Magdalena Zielińska
Agnieszka Cydzik-Kwiatkowska
University of Warmia and Mazury in Olsztyn
Faculty of Environmental Science
Department of Environmental Engineering
www.uwm.edu.pl
This project has received funding from the European Union’s Horizon 2020
research and innovation programme under grant agreement No 691911.
18