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Benefits of supplementing an industrial waste anaerobic digester with energy crops for increased biogas production.

Ivo Achu, Nges LU ; Escobar, Federico LU ; Fu, Xinmei LU and Björnsson, Lovisa LU (2012) In Waste Management 32(1). p.53-59
Abstract
Currently, there is increasing competition for waste as feedstock for the growing number of biogas plants. This has led to fluctuation in feedstock supply and biogas plants being operated below maximum capacity. The feasibility of supplementing a protein/lipid-rich industrial waste (pig manure, slaughterhouse waste, food processing and poultry waste) mesophilic anaerobic digester with carbohydrate-rich energy crops (hemp, maize and triticale) was therefore studied in laboratory scale batch and continuous stirred tank reactors (CSTR) with a view to scale-up to a commercial biogas process. Co-digesting industrial waste and crops led to significant improvement in methane yield per ton of feedstock and carbon-to-nitrogen ratio as compared to... (More)
Currently, there is increasing competition for waste as feedstock for the growing number of biogas plants. This has led to fluctuation in feedstock supply and biogas plants being operated below maximum capacity. The feasibility of supplementing a protein/lipid-rich industrial waste (pig manure, slaughterhouse waste, food processing and poultry waste) mesophilic anaerobic digester with carbohydrate-rich energy crops (hemp, maize and triticale) was therefore studied in laboratory scale batch and continuous stirred tank reactors (CSTR) with a view to scale-up to a commercial biogas process. Co-digesting industrial waste and crops led to significant improvement in methane yield per ton of feedstock and carbon-to-nitrogen ratio as compared to digestion of the industrial waste alone. Biogas production from crops in combination with industrial waste also avoids the need for micronutrients normally required in crop digestion. The batch co-digestion methane yields were used to predict co-digestion methane yield in full scale operation. This was done based on the ratio of methane yields observed for laboratory batch and CSTR experiments compared to full scale CSTR digestion of industrial waste. The economy of crop-based biogas production is limited under Swedish conditions; therefore, adding crops to existing industrial waste digestion could be a viable alternative to ensure a constant/reliable supply of feedstock to the anaerobic digester. (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
Co-digestion, Anaerobic digestion, Energy crops, Industrial waste, Micronutrients, Methane yield, C:N ratio
in
Waste Management
volume
32
issue
1
pages
53 - 59
publisher
Elsevier
external identifiers
  • wos:000297538200006
  • pmid:21975301
  • scopus:80055110898
ISSN
1879-2456
DOI
10.1016/j.wasman.2011.09.009
language
English
LU publication?
yes
id
389376d1-647c-4ab5-85c9-487e3399c19f (old id 2200784)
date added to LUP
2011-12-13 15:36:37
date last changed
2017-07-30 04:01:02
@article{389376d1-647c-4ab5-85c9-487e3399c19f,
  abstract     = {Currently, there is increasing competition for waste as feedstock for the growing number of biogas plants. This has led to fluctuation in feedstock supply and biogas plants being operated below maximum capacity. The feasibility of supplementing a protein/lipid-rich industrial waste (pig manure, slaughterhouse waste, food processing and poultry waste) mesophilic anaerobic digester with carbohydrate-rich energy crops (hemp, maize and triticale) was therefore studied in laboratory scale batch and continuous stirred tank reactors (CSTR) with a view to scale-up to a commercial biogas process. Co-digesting industrial waste and crops led to significant improvement in methane yield per ton of feedstock and carbon-to-nitrogen ratio as compared to digestion of the industrial waste alone. Biogas production from crops in combination with industrial waste also avoids the need for micronutrients normally required in crop digestion. The batch co-digestion methane yields were used to predict co-digestion methane yield in full scale operation. This was done based on the ratio of methane yields observed for laboratory batch and CSTR experiments compared to full scale CSTR digestion of industrial waste. The economy of crop-based biogas production is limited under Swedish conditions; therefore, adding crops to existing industrial waste digestion could be a viable alternative to ensure a constant/reliable supply of feedstock to the anaerobic digester.},
  author       = {Ivo Achu, Nges and Escobar, Federico and Fu, Xinmei and Björnsson, Lovisa},
  issn         = {1879-2456},
  keyword      = {Co-digestion,Anaerobic digestion,Energy crops,Industrial waste,Micronutrients,Methane yield,C:N ratio},
  language     = {eng},
  number       = {1},
  pages        = {53--59},
  publisher    = {Elsevier},
  series       = {Waste Management},
  title        = {Benefits of supplementing an industrial waste anaerobic digester with energy crops for increased biogas production.},
  url          = {http://dx.doi.org/10.1016/j.wasman.2011.09.009},
  volume       = {32},
  year         = {2012},
}