Advanced

Modeling of anaerobic digestion with a focus on estimation of hydrolysis constants at 35, 55, and 60°C

Haghighatafshar, Salar LU ; Ossiansson, Elin; Koch, Konrad; Kjerstadius, Hamse LU ; la Cour Jansen, Jes LU and Davidsson, Åsa LU (2015) In Water Environment Research 87(7). p.587-594
Abstract
Hydrolysis constants of mixed sludge at 35°C, 55°C, and 60°C were found to be 0.32 d-1, 0.44 d-1, and 0.50 d-1, respectively in pilot-scale semi-continuously operated anaerobic digesters. The hydrolysis constants as well as estimated chemical oxygen demand (COD) fractions in the feed were introduced to a mathematical model for anaerobic digestion published by Siegrist et al. (2002) which is similar to Anaerobic Digestion Model No. 1 (ADM1). First-order and Monod-type kinetics were tested for estimation of hydrolysis constants. The applied kinetics were found to affect the outcome of the regression study. Moreover, the free ammonia inhibition model was excluded for both propionate oxidation and acetate conversion, thanks to the apparent... (More)
Hydrolysis constants of mixed sludge at 35°C, 55°C, and 60°C were found to be 0.32 d-1, 0.44 d-1, and 0.50 d-1, respectively in pilot-scale semi-continuously operated anaerobic digesters. The hydrolysis constants as well as estimated chemical oxygen demand (COD) fractions in the feed were introduced to a mathematical model for anaerobic digestion published by Siegrist et al. (2002) which is similar to Anaerobic Digestion Model No. 1 (ADM1). First-order and Monod-type kinetics were tested for estimation of hydrolysis constants. The applied kinetics were found to affect the outcome of the regression study. Moreover, the free ammonia inhibition model was excluded for both propionate oxidation and acetate conversion, thanks to the apparent acclimatized biomass. No substantial accumulation of volatile fatty-acids (VFA) was observed in the reactors at 35, 55 and 60°C corresponding to free ammonia nitrogen (FAN) concentrations of about 20, 110 and 130 g N/m3, respectively. (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
anaerobic digestion model, free ammonia inhibition, hydrolysis constant
in
Water Environment Research
volume
87
issue
7
pages
587 - 594
publisher
Water Environment Federation
external identifiers
  • pmid:26163494
  • wos:000361495200002
  • scopus:84942155366
ISSN
1061-4303
DOI
10.2175/106143014X14062131177999
language
English
LU publication?
yes
id
697cc934-6d3f-467e-8f5d-8122cdd2c87c (old id 4587179)
date added to LUP
2014-09-04 11:18:43
date last changed
2017-09-10 04:02:34
@article{697cc934-6d3f-467e-8f5d-8122cdd2c87c,
  abstract     = {Hydrolysis constants of mixed sludge at 35°C, 55°C, and 60°C were found to be 0.32 d-1, 0.44 d-1, and 0.50 d-1, respectively in pilot-scale semi-continuously operated anaerobic digesters. The hydrolysis constants as well as estimated chemical oxygen demand (COD) fractions in the feed were introduced to a mathematical model for anaerobic digestion published by Siegrist et al. (2002) which is similar to Anaerobic Digestion Model No. 1 (ADM1). First-order and Monod-type kinetics were tested for estimation of hydrolysis constants. The applied kinetics were found to affect the outcome of the regression study. Moreover, the free ammonia inhibition model was excluded for both propionate oxidation and acetate conversion, thanks to the apparent acclimatized biomass. No substantial accumulation of volatile fatty-acids (VFA) was observed in the reactors at 35, 55 and 60°C corresponding to free ammonia nitrogen (FAN) concentrations of about 20, 110 and 130 g N/m3, respectively.},
  author       = {Haghighatafshar, Salar and Ossiansson, Elin and Koch, Konrad and Kjerstadius, Hamse and la Cour Jansen, Jes and Davidsson, Åsa},
  issn         = {1061-4303},
  keyword      = {anaerobic digestion model,free ammonia inhibition,hydrolysis constant},
  language     = {eng},
  number       = {7},
  pages        = {587--594},
  publisher    = {Water Environment Federation},
  series       = {Water Environment Research},
  title        = {Modeling of anaerobic digestion with a focus on estimation of hydrolysis constants at 35, 55, and 60°C},
  url          = {http://dx.doi.org/10.2175/106143014X14062131177999},
  volume       = {87},
  year         = {2015},
}