Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Pre-treatment of wastewater sludge before anaerobic digestion - hygienisation, ultrasonic treatment and enzyme dosing

Davidsson, Åsa LU orcid and la Cour Jansen, Jes LU (2006) In Vatten: tidskrift för vattenvård /Journal of Water Management and research 62(4). p.335-340
Abstract
Pre-treatment of sludge before anaerobic digestion can increase methane production and degradation of organic

matter. There are various pre-treatment methods for this purpose. Anaerobic digestion tests were performed for

comparison of three pre-treatment methods (hygienisation, ultrasonic treatment and enzyme dosing) used

separately or in combination on biosludge and mixed sludge. COD solubilisation and methane potentials from

the differently pretreated sludges were used for comparison. Pilot-scale digestion was further used for evaluation

of hygienised/untreated mixed sludge in semi-continuous operation.

The results show that pre-treatment of biosludge leads to increased methane... (More)
Pre-treatment of sludge before anaerobic digestion can increase methane production and degradation of organic

matter. There are various pre-treatment methods for this purpose. Anaerobic digestion tests were performed for

comparison of three pre-treatment methods (hygienisation, ultrasonic treatment and enzyme dosing) used

separately or in combination on biosludge and mixed sludge. COD solubilisation and methane potentials from

the differently pretreated sludges were used for comparison. Pilot-scale digestion was further used for evaluation

of hygienised/untreated mixed sludge in semi-continuous operation.

The results show that pre-treatment of biosludge leads to increased methane potential, especially hygienisation

and ultrasonic treatment. Combining enzyme dosing with hygienisation or ultrasonication implies additional

increase in methane potential while hygienisation combined with ultrasonication does not.

Increased COD solubilisation seen after pre-tretment does not always bring about an increase in methane

potential. On the other hand, pre-treatment methods like ultrasonication can lead to higher methane production

although the COD solubilisation is low. (Less)
Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Vatten: tidskrift för vattenvård /Journal of Water Management and research
volume
62
issue
4
pages
335 - 340
publisher
Föreningen Vatten
ISSN
0042-2886
language
English
LU publication?
yes
id
d9458477-2ccb-4060-ae87-f78919bc1404 (old id 3917104)
date added to LUP
2016-04-01 16:15:56
date last changed
2018-11-21 20:40:02
@article{d9458477-2ccb-4060-ae87-f78919bc1404,
  abstract     = {Pre-treatment of sludge before anaerobic digestion can increase methane production and degradation of organic<br/><br>
matter. There are various pre-treatment methods for this purpose. Anaerobic digestion tests were performed for<br/><br>
comparison of three pre-treatment methods (hygienisation, ultrasonic treatment and enzyme dosing) used<br/><br>
separately or in combination on biosludge and mixed sludge. COD solubilisation and methane potentials from<br/><br>
the differently pretreated sludges were used for comparison. Pilot-scale digestion was further used for evaluation<br/><br>
of hygienised/untreated mixed sludge in semi-continuous operation.<br/><br>
The results show that pre-treatment of biosludge leads to increased methane potential, especially hygienisation<br/><br>
and ultrasonic treatment. Combining enzyme dosing with hygienisation or ultrasonication implies additional<br/><br>
increase in methane potential while hygienisation combined with ultrasonication does not.<br/><br>
Increased COD solubilisation seen after pre-tretment does not always bring about an increase in methane<br/><br>
potential. On the other hand, pre-treatment methods like ultrasonication can lead to higher methane production<br/><br>
although the COD solubilisation is low.},
  author       = {Davidsson, Åsa and la Cour Jansen, Jes},
  issn         = {0042-2886},
  language     = {eng},
  number       = {4},
  pages        = {335--340},
  publisher    = {Föreningen Vatten},
  series       = {Vatten: tidskrift för vattenvård /Journal of Water Management and research},
  title        = {Pre-treatment of wastewater sludge before anaerobic digestion - hygienisation, ultrasonic treatment and enzyme dosing},
  url          = {https://lup.lub.lu.se/search/ws/files/4620173/3917111},
  volume       = {62},
  year         = {2006},
}