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The energy balance in farm scale anaerobic digestion of crop residues at 11-37 degrees C

Bohn, Irene LU ; Björnsson, Lovisa LU and Mattiasson, Bo LU (2007) In Process Biochemistry 42(1). p.57-64
Abstract
Crop residues can be used for biogas production in farm scale reactors. Use of a process temperature below mesophilic conditions reduces the need for heating as well as investment and operating costs, although it may also reduce the methane yield. In the present study the effect of temperature on net energy output was studied using sugar beet tops and straw as substrates for two pilot-scale reactors. Digestion was found to be stable down to 11 degrees C and optimal methane yield was obtained at 30 degrees C. The methane yield and process performance was studied at 15 degrees C and 30 'C as organic loading rates were increased. It was found that the highest net energy production would be achieved at 30 degrees C with a loading rate of 3.3... (More)
Crop residues can be used for biogas production in farm scale reactors. Use of a process temperature below mesophilic conditions reduces the need for heating as well as investment and operating costs, although it may also reduce the methane yield. In the present study the effect of temperature on net energy output was studied using sugar beet tops and straw as substrates for two pilot-scale reactors. Digestion was found to be stable down to 11 degrees C and optimal methane yield was obtained at 30 degrees C. The methane yield and process performance was studied at 15 degrees C and 30 'C as organic loading rates were increased. It was found that the highest net energy production would be achieved at 30 degrees C with a loading rate of 3.3 kg VS m(-3) day(-1). Running a low-cost process at ambient temperatures would give a net energy output of 60% of that obtained at 30 degrees C. (c) 2006 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
pilot-scale, temperature, low, farm-scale, energy balance, anaerobic digestion, crop residues
in
Process Biochemistry
volume
42
issue
1
pages
57 - 64
publisher
Elsevier
external identifiers
  • wos:000243712800009
  • scopus:33750949584
ISSN
1873-3298
DOI
10.1016/j.procbio.2006.07.013
language
English
LU publication?
yes
id
084e7977-0e18-46dd-848c-c71ad055593d (old id 675398)
date added to LUP
2007-12-10 15:48:22
date last changed
2017-08-27 03:53:18
@article{084e7977-0e18-46dd-848c-c71ad055593d,
  abstract     = {Crop residues can be used for biogas production in farm scale reactors. Use of a process temperature below mesophilic conditions reduces the need for heating as well as investment and operating costs, although it may also reduce the methane yield. In the present study the effect of temperature on net energy output was studied using sugar beet tops and straw as substrates for two pilot-scale reactors. Digestion was found to be stable down to 11 degrees C and optimal methane yield was obtained at 30 degrees C. The methane yield and process performance was studied at 15 degrees C and 30 'C as organic loading rates were increased. It was found that the highest net energy production would be achieved at 30 degrees C with a loading rate of 3.3 kg VS m(-3) day(-1). Running a low-cost process at ambient temperatures would give a net energy output of 60% of that obtained at 30 degrees C. (c) 2006 Elsevier Ltd. All rights reserved.},
  author       = {Bohn, Irene and Björnsson, Lovisa and Mattiasson, Bo},
  issn         = {1873-3298},
  keyword      = {pilot-scale,temperature,low,farm-scale,energy balance,anaerobic digestion,crop residues},
  language     = {eng},
  number       = {1},
  pages        = {57--64},
  publisher    = {Elsevier},
  series       = {Process Biochemistry},
  title        = {The energy balance in farm scale anaerobic digestion of crop residues at 11-37 degrees C},
  url          = {http://dx.doi.org/10.1016/j.procbio.2006.07.013},
  volume       = {42},
  year         = {2007},
}