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Stable operation during pilot-scale anaerobic digestion of nutrient-supplemented maize/sugar beet silage.

Ivo Achu, Nges LU ; Björn, Annika and Björnsson, Lovisa LU (2012) In Bioresource Technology 118C. p.445-454
Abstract
Biogas production from maize/sugar beet silage was studied under mesophilic conditions in a continuous stirred tank reactor pilot-scale process. While energy crop mono-digestion is often performed with very long hydraulic retention times (HRTs), the present study demonstrated an efficient process operating with a 50-day HRT and a corrected total solids (TS(corr)) based organic loading rate of 3.4kg/m(3)d. The good performance was attributed to supplementation with both macro- and micronutrients and was evidenced by good methane yields (318m(3)/tonTS(corr)), which were comparable to laboratory maximum expected yields, plus low total volatile fatty acid concentrations (<0.8g/L). A viscoplastic and thixotropic digester fluid behaviour was... (More)
Biogas production from maize/sugar beet silage was studied under mesophilic conditions in a continuous stirred tank reactor pilot-scale process. While energy crop mono-digestion is often performed with very long hydraulic retention times (HRTs), the present study demonstrated an efficient process operating with a 50-day HRT and a corrected total solids (TS(corr)) based organic loading rate of 3.4kg/m(3)d. The good performance was attributed to supplementation with both macro- and micronutrients and was evidenced by good methane yields (318m(3)/tonTS(corr)), which were comparable to laboratory maximum expected yields, plus low total volatile fatty acid concentrations (<0.8g/L). A viscoplastic and thixotropic digester fluid behaviour was observed, and the viscosity problems common in crop mono-digestion were not seen in this study. The effluent also complied with Swedish certification standards for bio-fertilizer for farmland application. Nutrient addition thus rendered a stable biogas process, while the effluent was a good quality bio-fertilizer. (Less)
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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Biogas, Bio-fertilizer, Energy crops, Macronutrients, Micronutrients
in
Bioresource Technology
volume
118C
pages
445 - 454
publisher
Elsevier
external identifiers
  • wos:000307259600060
  • pmid:22717562
  • scopus:84862272601
  • pmid:22717562
ISSN
1873-2976
DOI
10.1016/j.biortech.2012.05.096
language
English
LU publication?
yes
id
527b0928-d446-40eb-bac9-1a907189f13a (old id 2859210)
date added to LUP
2016-04-01 13:24:18
date last changed
2022-01-27 19:03:03
@article{527b0928-d446-40eb-bac9-1a907189f13a,
  abstract     = {{Biogas production from maize/sugar beet silage was studied under mesophilic conditions in a continuous stirred tank reactor pilot-scale process. While energy crop mono-digestion is often performed with very long hydraulic retention times (HRTs), the present study demonstrated an efficient process operating with a 50-day HRT and a corrected total solids (TS(corr)) based organic loading rate of 3.4kg/m(3)d. The good performance was attributed to supplementation with both macro- and micronutrients and was evidenced by good methane yields (318m(3)/tonTS(corr)), which were comparable to laboratory maximum expected yields, plus low total volatile fatty acid concentrations (&lt;0.8g/L). A viscoplastic and thixotropic digester fluid behaviour was observed, and the viscosity problems common in crop mono-digestion were not seen in this study. The effluent also complied with Swedish certification standards for bio-fertilizer for farmland application. Nutrient addition thus rendered a stable biogas process, while the effluent was a good quality bio-fertilizer.}},
  author       = {{Ivo Achu, Nges and Björn, Annika and Björnsson, Lovisa}},
  issn         = {{1873-2976}},
  keywords     = {{Biogas; Bio-fertilizer; Energy crops; Macronutrients; Micronutrients}},
  language     = {{eng}},
  pages        = {{445--454}},
  publisher    = {{Elsevier}},
  series       = {{Bioresource Technology}},
  title        = {{Stable operation during pilot-scale anaerobic digestion of nutrient-supplemented maize/sugar beet silage.}},
  url          = {{http://dx.doi.org/10.1016/j.biortech.2012.05.096}},
  doi          = {{10.1016/j.biortech.2012.05.096}},
  volume       = {{118C}},
  year         = {{2012}},
}