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The effect of operational temperature on dewatering characteristics of digested sludge

Bouskova, Alzbeta LU ; Persson, E ; la Cour Jansen, Jes LU and Dohanyos, M (2006) In Journal of Residuals Science and Technology 3(1). p.43-49
Abstract
Dewatering properties and sludge structure of anaerobically digested sludge were studied in relation to an increasing operational temperature. Sludge samples were taken from 5 pilot-scale CSTR reactors treating municipal sewage sludge with working volume of 20 L and operating at 33, 35, 37, 39 and 55 degrees C, respectively. The main parameters of interest were capillary suction time (CST), concentration of extracellular polymeric substances (EPS), charge density of the extracted EPS, filterability (dry solids content after vacuum filtration), compactibility (dry solids content after pressing) and concentration of fine particles in the liquid phase (turbidity). Sludge from the reactor working at 55 degrees C (thermophilic) contained the... (More)
Dewatering properties and sludge structure of anaerobically digested sludge were studied in relation to an increasing operational temperature. Sludge samples were taken from 5 pilot-scale CSTR reactors treating municipal sewage sludge with working volume of 20 L and operating at 33, 35, 37, 39 and 55 degrees C, respectively. The main parameters of interest were capillary suction time (CST), concentration of extracellular polymeric substances (EPS), charge density of the extracted EPS, filterability (dry solids content after vacuum filtration), compactibility (dry solids content after pressing) and concentration of fine particles in the liquid phase (turbidity). Sludge from the reactor working at 55 degrees C (thermophilic) contained the most fine particles in the liquid phase, which remarkably deteriorated filterability of the sample, however when subjected to an external pressure, the sludge reached the highest dry matter content of the sludge cake. Sludge originating from the reactor working at 37 degrees C reached the best filtration properties. (Less)
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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Residuals Science and Technology
volume
3
issue
1
pages
43 - 49
publisher
DEStech Publications
external identifiers
  • wos:000237219400006
  • scopus:57349187645
ISSN
1544-8053
language
English
LU publication?
yes
id
8d6c1548-07f6-4b76-9151-f93ea2964da5 (old id 410745)
date added to LUP
2016-04-01 17:00:10
date last changed
2021-02-17 07:02:59
@article{8d6c1548-07f6-4b76-9151-f93ea2964da5,
  abstract     = {Dewatering properties and sludge structure of anaerobically digested sludge were studied in relation to an increasing operational temperature. Sludge samples were taken from 5 pilot-scale CSTR reactors treating municipal sewage sludge with working volume of 20 L and operating at 33, 35, 37, 39 and 55 degrees C, respectively. The main parameters of interest were capillary suction time (CST), concentration of extracellular polymeric substances (EPS), charge density of the extracted EPS, filterability (dry solids content after vacuum filtration), compactibility (dry solids content after pressing) and concentration of fine particles in the liquid phase (turbidity). Sludge from the reactor working at 55 degrees C (thermophilic) contained the most fine particles in the liquid phase, which remarkably deteriorated filterability of the sample, however when subjected to an external pressure, the sludge reached the highest dry matter content of the sludge cake. Sludge originating from the reactor working at 37 degrees C reached the best filtration properties.},
  author       = {Bouskova, Alzbeta and Persson, E and la Cour Jansen, Jes and Dohanyos, M},
  issn         = {1544-8053},
  language     = {eng},
  number       = {1},
  pages        = {43--49},
  publisher    = {DEStech Publications},
  series       = {Journal of Residuals Science and Technology},
  title        = {The effect of operational temperature on dewatering characteristics of digested sludge},
  volume       = {3},
  year         = {2006},
}