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Enhancing performance in anaerobic high-solids stratified bed digesters by straw bed implementation

Svensson, Mattias LU ; Björnsson, Lovisa LU and Mattiasson, Bo LU (2007) In Bioresource Technology 98(1). p.46-52
Abstract
Anaerobic high-solids single-stage stratified bed digesters have been found to be simple and flexible design candidates for small-scale reactors located in medium- to low-technology environments. In the present study, wheat straw was used as the starter material for the stratified bed. Upon green mass feeding, the anaerobically stabilised straw bed functioned both as a biofilm support and as a particulate filter. It enabled a direct onset of 7 kg VS m(-3) batch loads, added twice a week, and permitted a low but consistent bed permeability during feeding at an average superficial flow velocity of 1 m d(-1) to be achieved. Fed-batch tests with sugar beet tops in pilot- and laboratory-scale setups at an average loading rate of 2 kg VS m(-3)... (More)
Anaerobic high-solids single-stage stratified bed digesters have been found to be simple and flexible design candidates for small-scale reactors located in medium- to low-technology environments. In the present study, wheat straw was used as the starter material for the stratified bed. Upon green mass feeding, the anaerobically stabilised straw bed functioned both as a biofilm support and as a particulate filter. It enabled a direct onset of 7 kg VS m(-3) batch loads, added twice a week, and permitted a low but consistent bed permeability during feeding at an average superficial flow velocity of 1 m d(-1) to be achieved. Fed-batch tests with sugar beet tops in pilot- and laboratory-scale setups at an average loading rate of 2 kg VS m(-3) d(-1) resulted in average biogas production rates of 1.2-1.4 m(3) m(-3) d(-1) and methane yields of 0.31-0.36 m(3) kg(-1) VSadded. At the end of the laboratory-scale feeding trial, the 200 day old straw bed had compacted to 50% of its initial volume, without any negative effects on performance being detectable. (c) 2005 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
lignocellulosics, fixed bed, farm-scale, dry digestion, packing density, crop residues, straw bed priming, foaming, intermittent leachate recycle
in
Bioresource Technology
volume
98
issue
1
pages
46 - 52
publisher
Elsevier
external identifiers
  • wos:000241443700007
  • scopus:33748053960
ISSN
1873-2976
DOI
10.1016/j.biortech.2005.11.023
language
English
LU publication?
yes
id
886bc9de-60b4-40a6-a161-01e8c91c7a8a (old id 387149)
date added to LUP
2007-12-18 16:01:09
date last changed
2017-11-12 03:52:14
@article{886bc9de-60b4-40a6-a161-01e8c91c7a8a,
  abstract     = {Anaerobic high-solids single-stage stratified bed digesters have been found to be simple and flexible design candidates for small-scale reactors located in medium- to low-technology environments. In the present study, wheat straw was used as the starter material for the stratified bed. Upon green mass feeding, the anaerobically stabilised straw bed functioned both as a biofilm support and as a particulate filter. It enabled a direct onset of 7 kg VS m(-3) batch loads, added twice a week, and permitted a low but consistent bed permeability during feeding at an average superficial flow velocity of 1 m d(-1) to be achieved. Fed-batch tests with sugar beet tops in pilot- and laboratory-scale setups at an average loading rate of 2 kg VS m(-3) d(-1) resulted in average biogas production rates of 1.2-1.4 m(3) m(-3) d(-1) and methane yields of 0.31-0.36 m(3) kg(-1) VSadded. At the end of the laboratory-scale feeding trial, the 200 day old straw bed had compacted to 50% of its initial volume, without any negative effects on performance being detectable. (c) 2005 Elsevier Ltd. All rights reserved.},
  author       = {Svensson, Mattias and Björnsson, Lovisa and Mattiasson, Bo},
  issn         = {1873-2976},
  keyword      = {lignocellulosics,fixed bed,farm-scale,dry digestion,packing density,crop residues,straw bed priming,foaming,intermittent leachate recycle},
  language     = {eng},
  number       = {1},
  pages        = {46--52},
  publisher    = {Elsevier},
  series       = {Bioresource Technology},
  title        = {Enhancing performance in anaerobic high-solids stratified bed digesters by straw bed implementation},
  url          = {http://dx.doi.org/10.1016/j.biortech.2005.11.023},
  volume       = {98},
  year         = {2007},
}