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Straw bed priming enhances the methane yield and speeds up the start-up of single-stage, high-solids anaerobic reactors treating plant biomass

Svensson, Mattias LU ; Björnsson, Lovisa LU and Mattiasson, Bo LU (2006) In Journal of Chemical Technology and Biotechnology 81(11). p.1729-1735
Abstract
A simple and potentially inexpensive implementation of a high-solids reactor is a single-stage, stratified bed reactor, in which the bed is made up of the plant biomass fed into the system. In the present study, the stratified bed was started up for a period of four weeks by either direct feeding of sugar beet leaves at four different feeding rates, or by introducing a straw bed primer which was batch digested without feeding. During weeks five to six both systems were fed with sugar beet leaves at such a rate that the total amount of beet leaves added at the end of week six was the same in each of the four corresponding pairs of straw and 'no-straw' reactors. Straw bed priming enhanced the methane yield of the sugar beet leaves, with... (More)
A simple and potentially inexpensive implementation of a high-solids reactor is a single-stage, stratified bed reactor, in which the bed is made up of the plant biomass fed into the system. In the present study, the stratified bed was started up for a period of four weeks by either direct feeding of sugar beet leaves at four different feeding rates, or by introducing a straw bed primer which was batch digested without feeding. During weeks five to six both systems were fed with sugar beet leaves at such a rate that the total amount of beet leaves added at the end of week six was the same in each of the four corresponding pairs of straw and 'no-straw' reactors. Straw bed priming enhanced the methane yield of the sugar beet leaves, with 0.33-0.37 in 3 kg(-1) VSadded (volatile solids) accumulated at average solid retention times as short as 11-25 days, while the 'no-straw' reactors had lower yields at longer average solid retention times. The levels and speciation of the organic acids suggested that both the rate and extent of the anaerobic digestion of the sugar beet leaves added in the straw reactors were improved. At the highest loading rate, the straw reactor failed, while the 'no-straw' reactor did not. It is hypothesised that the microbial biomass was better established in the straw reactors than in the 'no-straw' reactors. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
crop residues, farm-scale, intermittent leachate recycling, fixed straw bed, dry anaerobic digestion
in
Journal of Chemical Technology and Biotechnology
volume
81
issue
11
pages
1729 - 1735
publisher
Wiley-Blackwell
external identifiers
  • wos:000241999100002
  • scopus:33745730054
ISSN
0268-2575
DOI
10.1002/jctb.1592
language
English
LU publication?
yes
id
12add577-e518-4f26-a2dd-378f41aecf62 (old id 376992)
date added to LUP
2007-08-20 10:50:21
date last changed
2019-01-06 10:07:45
@article{12add577-e518-4f26-a2dd-378f41aecf62,
  abstract     = {A simple and potentially inexpensive implementation of a high-solids reactor is a single-stage, stratified bed reactor, in which the bed is made up of the plant biomass fed into the system. In the present study, the stratified bed was started up for a period of four weeks by either direct feeding of sugar beet leaves at four different feeding rates, or by introducing a straw bed primer which was batch digested without feeding. During weeks five to six both systems were fed with sugar beet leaves at such a rate that the total amount of beet leaves added at the end of week six was the same in each of the four corresponding pairs of straw and 'no-straw' reactors. Straw bed priming enhanced the methane yield of the sugar beet leaves, with 0.33-0.37 in 3 kg(-1) VSadded (volatile solids) accumulated at average solid retention times as short as 11-25 days, while the 'no-straw' reactors had lower yields at longer average solid retention times. The levels and speciation of the organic acids suggested that both the rate and extent of the anaerobic digestion of the sugar beet leaves added in the straw reactors were improved. At the highest loading rate, the straw reactor failed, while the 'no-straw' reactor did not. It is hypothesised that the microbial biomass was better established in the straw reactors than in the 'no-straw' reactors.},
  author       = {Svensson, Mattias and Björnsson, Lovisa and Mattiasson, Bo},
  issn         = {0268-2575},
  keyword      = {crop residues,farm-scale,intermittent leachate recycling,fixed straw bed,dry anaerobic digestion},
  language     = {eng},
  number       = {11},
  pages        = {1729--1735},
  publisher    = {Wiley-Blackwell},
  series       = {Journal of Chemical Technology and Biotechnology},
  title        = {Straw bed priming enhances the methane yield and speeds up the start-up of single-stage, high-solids anaerobic reactors treating plant biomass},
  url          = {http://dx.doi.org/10.1002/jctb.1592},
  volume       = {81},
  year         = {2006},
}