Hydrolysis of return sludge for production of easily biodegradable carbon: effect of pre-treatment, sludge age and temperature
(2006) In Water Science and Technology 53(12). p.47-54- Abstract
- Return sludge from two Swedish and two Danish wastewater treatment plants were hydrolysed in laboratory reactors. Treatment plants with/without pre-sedimentation and with/without nitrification were represented. Soluble organic matter was produced from all types of sludge, but the yield was to a large extent dependent on what type of sludge was hydrolysed. Activated sludge from wastewater treatment plants without pre-treatment returned more soluble carbon after hydrolysis than sludge from treatment plants with pre-sedimentation. In addition, more soluble carbon was formed from non-nitrifying activated sludge than from nitrifying sludge. Moreover, the maximum yield of soluble COD at 10 degrees C was less than the yield at 20 degrees C. The... (More)
- Return sludge from two Swedish and two Danish wastewater treatment plants were hydrolysed in laboratory reactors. Treatment plants with/without pre-sedimentation and with/without nitrification were represented. Soluble organic matter was produced from all types of sludge, but the yield was to a large extent dependent on what type of sludge was hydrolysed. Activated sludge from wastewater treatment plants without pre-treatment returned more soluble carbon after hydrolysis than sludge from treatment plants with pre-sedimentation. In addition, more soluble carbon was formed from non-nitrifying activated sludge than from nitrifying sludge. Moreover, the maximum yield of soluble COD at 10 degrees C was less than the yield at 20 degrees C. The initial hydrolysis rate was found to be between 0.35 and 1.8 mg soluble COD/(g VS x h). With the exception of one case, between 15 and 50% of the produced soluble COD was shown to be volatile fatty acids, a suitable carbon source for biological phosphorus removal. Nitrification rate measurements indicated that the viability of the activated sludge was not affected by the hydrolysis. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/398595
- author
- Jönsson, Karin LU and la Cour Jansen, Jes LU
- organization
- publishing date
- 2006
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- return sludge, activated sludge, hydrolysis, soluble COD
- in
- Water Science and Technology
- volume
- 53
- issue
- 12
- pages
- 47 - 54
- publisher
- IWA Publishing
- external identifiers
-
- wos:000239543700006
- scopus:33746522349
- ISSN
- 0273-1223
- DOI
- 10.2166/wst.2006.405
- language
- English
- LU publication?
- yes
- id
- 1372571c-cbb6-4127-9215-9d0e63747fc3 (old id 398595)
- date added to LUP
- 2016-04-01 17:09:21
- date last changed
- 2023-09-19 08:26:51
@article{1372571c-cbb6-4127-9215-9d0e63747fc3,
abstract = {{Return sludge from two Swedish and two Danish wastewater treatment plants were hydrolysed in laboratory reactors. Treatment plants with/without pre-sedimentation and with/without nitrification were represented. Soluble organic matter was produced from all types of sludge, but the yield was to a large extent dependent on what type of sludge was hydrolysed. Activated sludge from wastewater treatment plants without pre-treatment returned more soluble carbon after hydrolysis than sludge from treatment plants with pre-sedimentation. In addition, more soluble carbon was formed from non-nitrifying activated sludge than from nitrifying sludge. Moreover, the maximum yield of soluble COD at 10 degrees C was less than the yield at 20 degrees C. The initial hydrolysis rate was found to be between 0.35 and 1.8 mg soluble COD/(g VS x h). With the exception of one case, between 15 and 50% of the produced soluble COD was shown to be volatile fatty acids, a suitable carbon source for biological phosphorus removal. Nitrification rate measurements indicated that the viability of the activated sludge was not affected by the hydrolysis.}},
author = {{Jönsson, Karin and la Cour Jansen, Jes}},
issn = {{0273-1223}},
keywords = {{return sludge; activated sludge; hydrolysis; soluble COD}},
language = {{eng}},
number = {{12}},
pages = {{47--54}},
publisher = {{IWA Publishing}},
series = {{Water Science and Technology}},
title = {{Hydrolysis of return sludge for production of easily biodegradable carbon: effect of pre-treatment, sludge age and temperature}},
url = {{http://dx.doi.org/10.2166/wst.2006.405}},
doi = {{10.2166/wst.2006.405}},
volume = {{53}},
year = {{2006}},
}