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Evaluating the influences of mixing strategies on the Biochemical Methane Potential test

Wang, Bing LU ; Björn, Annika; Strömberg, Sten LU ; Ivo Achu, Nges LU ; Nistor, Mihaela LU and Liu, Jing LU (2017) In Journal of Environmental Management 185. p.54-59
Abstract

Mixing plays an important role in the Biochemical Methane Potential (BMP) test, but only limited efforts have been put into it. In this study, various mixing strategies were applied to evaluate the influences on the BMP test, i.e., no mixing, shaking in water bath, shake manually once per day (SKM), automated unidirectional and bidirectional mixing. The results show that the effects of mixing are prominent for the most viscous substrate investigated, as both the highest methane production and highest maximal daily methane production were obtained at the highest mixing intensity. However, the organic removal efficiencies were not affected, which might offer evidence that mixing helps the release of gases trapped in digester liquid.... (More)

Mixing plays an important role in the Biochemical Methane Potential (BMP) test, but only limited efforts have been put into it. In this study, various mixing strategies were applied to evaluate the influences on the BMP test, i.e., no mixing, shaking in water bath, shake manually once per day (SKM), automated unidirectional and bidirectional mixing. The results show that the effects of mixing are prominent for the most viscous substrate investigated, as both the highest methane production and highest maximal daily methane production were obtained at the highest mixing intensity. However, the organic removal efficiencies were not affected, which might offer evidence that mixing helps the release of gases trapped in digester liquid. Moreover, mixing is required for improved methane production when the digester content is viscous, conversely, mixing is unnecessary or SKM might be sufficient for the BMP test if the digester content is quite dilute or the substrate is easily degraded.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Anaerobic digestion, Biochemical methane potential, Degradation kinetics, Mixing, Viscosity
in
Journal of Environmental Management
volume
185
pages
6 pages
publisher
Academic Press
external identifiers
  • scopus:84994589178
  • wos:000388777900006
ISSN
0301-4797
DOI
10.1016/j.jenvman.2016.10.044
language
English
LU publication?
yes
id
e08c0c81-e9bb-4f32-a96a-6e6ba83a1ee0
date added to LUP
2017-03-17 10:16:26
date last changed
2018-05-13 04:29:54
@article{e08c0c81-e9bb-4f32-a96a-6e6ba83a1ee0,
  abstract     = {<p>Mixing plays an important role in the Biochemical Methane Potential (BMP) test, but only limited efforts have been put into it. In this study, various mixing strategies were applied to evaluate the influences on the BMP test, i.e., no mixing, shaking in water bath, shake manually once per day (SKM), automated unidirectional and bidirectional mixing. The results show that the effects of mixing are prominent for the most viscous substrate investigated, as both the highest methane production and highest maximal daily methane production were obtained at the highest mixing intensity. However, the organic removal efficiencies were not affected, which might offer evidence that mixing helps the release of gases trapped in digester liquid. Moreover, mixing is required for improved methane production when the digester content is viscous, conversely, mixing is unnecessary or SKM might be sufficient for the BMP test if the digester content is quite dilute or the substrate is easily degraded.</p>},
  author       = {Wang, Bing and Björn, Annika and Strömberg, Sten and Ivo Achu, Nges and Nistor, Mihaela and Liu, Jing},
  issn         = {0301-4797},
  keyword      = {Anaerobic digestion,Biochemical methane potential,Degradation kinetics,Mixing,Viscosity},
  language     = {eng},
  month        = {01},
  pages        = {54--59},
  publisher    = {Academic Press},
  series       = {Journal of Environmental Management},
  title        = {Evaluating the influences of mixing strategies on the Biochemical Methane Potential test},
  url          = {http://dx.doi.org/10.1016/j.jenvman.2016.10.044},
  volume       = {185},
  year         = {2017},
}