Strategies for enzyme dosing to enhance anaerobic digestion of sewage sludge
Davidsson, Åsa LU
; Wawrzynczyk, Joanna
LU
; Norrlöw, Olof
LU
and la Cour Jansen, Jes
LU
(2007)
In Journal of Residuals Science and Technology
4(1).
p.1-7
- Abstract
- Enhancement of anaerobic digestion of sewage sludge by enzyme addition was demonstrated in batch digestion tests. A pre-hydrolysation step with addition of enzymes at controlled temperature during 4 hours was shown to increase the methane yield significantly. Further tests with direct feeding of enzymes together with fresh sludge to the digester gave the same effect of a methane yield increase. For implementation in full-scale, different strategies for adding the enzymes were tested in batch laboratory tests and pilot-scale continuous digestion. The addition to the inlet together with fresh sludge and addition with re-circulated digested sludge were compared. Both ways resulted in significant increases in methane production. The highest... (More)
- Enhancement of anaerobic digestion of sewage sludge by enzyme addition was demonstrated in batch digestion tests. A pre-hydrolysation step with addition of enzymes at controlled temperature during 4 hours was shown to increase the methane yield significantly. Further tests with direct feeding of enzymes together with fresh sludge to the digester gave the same effect of a methane yield increase. For implementation in full-scale, different strategies for adding the enzymes were tested in batch laboratory tests and pilot-scale continuous digestion. The addition to the inlet together with fresh sludge and addition with re-circulated digested sludge were compared. Both ways resulted in significant increases in methane production. The highest yield was achieved when enzymes were added together with fresh sludge in continuous pilot-scale digestion. Enzymatic treatment decreased the biomass vitality in the digester without reducing the methanogenic activity. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/674160
- author
- Davidsson, Åsa
LU
; Wawrzynczyk, Joanna
LU
; Norrlöw, Olof
LU
and la Cour Jansen, Jes
LU
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Residuals Science and Technology
- volume
- 4
- issue
- 1
- pages
- 1 - 7
- publisher
- DEStech Publications
- external identifiers
-
- wos:000244358100001
- scopus:35348944488
- ISSN
- 1544-8053
- language
- English
- LU publication?
- yes
- id
- e4a2b5bc-99f3-4e50-b965-b007ed2c3d65 (old id 674160)
- date added to LUP
- 2016-04-01 16:36:44
- date last changed
- 2023-11-14 14:35:22
@article{e4a2b5bc-99f3-4e50-b965-b007ed2c3d65,
abstract = {{Enhancement of anaerobic digestion of sewage sludge by enzyme addition was demonstrated in batch digestion tests. A pre-hydrolysation step with addition of enzymes at controlled temperature during 4 hours was shown to increase the methane yield significantly. Further tests with direct feeding of enzymes together with fresh sludge to the digester gave the same effect of a methane yield increase. For implementation in full-scale, different strategies for adding the enzymes were tested in batch laboratory tests and pilot-scale continuous digestion. The addition to the inlet together with fresh sludge and addition with re-circulated digested sludge were compared. Both ways resulted in significant increases in methane production. The highest yield was achieved when enzymes were added together with fresh sludge in continuous pilot-scale digestion. Enzymatic treatment decreased the biomass vitality in the digester without reducing the methanogenic activity.}},
author = {{Davidsson, Åsa and Wawrzynczyk, Joanna and Norrlöw, Olof and la Cour Jansen, Jes}},
issn = {{1544-8053}},
language = {{eng}},
number = {{1}},
pages = {{1--7}},
publisher = {{DEStech Publications}},
series = {{Journal of Residuals Science and Technology}},
title = {{Strategies for enzyme dosing to enhance anaerobic digestion of sewage sludge}},
volume = {{4}},
year = {{2007}},
}