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Enhancement of anaerobic batch digestion of sisal pulp waste by mesophilic aerobic pre-treatment

Mshandete, Anthony LU ; Björnsson, Lovisa LU ; Kivaisi, AK; Rubindamayugi, ST and Mattiasson, Bo LU (2005) In Water Research 39(8). p.1569-1575
Abstract
Pre-treatment of sisal pulp prior to its anaerobic digestion was investigated using an activated sludge mixed culture under aerobic conditions in batch bioreactors at 37 degrees C. The progression of aerobic pre-treatment of the residue in relation to the activities of some extracellular hydrolytic enzymes in the slurry was monitored. The highest activity of hydrolytic enzymes was obtained at 9 h of pre-treatment. Filter paper cellulase had a maximum activity of 0.90 IU/ml, while carboxymethyl cellulase, amylase and xylanase were produced to a maximum of about 0.40 IU/ml. The methane yield obtained after anaerobic digestion of the pre-treated pulp ranged between 0.12 and 0.24 m(3) CH4/kg VS added. The highest and lowest values were... (More)
Pre-treatment of sisal pulp prior to its anaerobic digestion was investigated using an activated sludge mixed culture under aerobic conditions in batch bioreactors at 37 degrees C. The progression of aerobic pre-treatment of the residue in relation to the activities of some extracellular hydrolytic enzymes in the slurry was monitored. The highest activity of hydrolytic enzymes was obtained at 9 h of pre-treatment. Filter paper cellulase had a maximum activity of 0.90 IU/ml, while carboxymethyl cellulase, amylase and xylanase were produced to a maximum of about 0.40 IU/ml. The methane yield obtained after anaerobic digestion of the pre-treated pulp ranged between 0.12 and 0.24 m(3) CH4/kg VS added. The highest and lowest values were obtained for 9 and 72 h of pre-treatment, respectively. Nine hours of pre-treatment of sisal pulp prior to anaerobic digestion demonstrated a 26 % higher methane yield when compared to the sisal pulp without pre-treatment. The consortia of microorganisms in activated sludge demonstrated a useful potential in the production of hydrolases acting on major macromolecules of sisal pulp. The fact that a correlation was observed between high enzyme activity and high methane yield at 9h of aerobic pre-treatment suggests that such a short pretreatment period could be an alternative option for increasing solubilization of sisal pulp and promoting methane productivity. (c) 2005 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Water Research
volume
39
issue
8
pages
1569 - 1575
publisher
Elsevier
external identifiers
  • pmid:15878029
  • wos:000229351700016
  • scopus:18244395307
ISSN
1879-2448
DOI
10.1016/j.watres.2004.11.037
language
English
LU publication?
yes
id
b7937f18-c1bb-4d3e-bc60-7ba2794afaab (old id 155169)
date added to LUP
2007-07-02 14:06:32
date last changed
2017-10-22 04:42:38
@article{b7937f18-c1bb-4d3e-bc60-7ba2794afaab,
  abstract     = {Pre-treatment of sisal pulp prior to its anaerobic digestion was investigated using an activated sludge mixed culture under aerobic conditions in batch bioreactors at 37 degrees C. The progression of aerobic pre-treatment of the residue in relation to the activities of some extracellular hydrolytic enzymes in the slurry was monitored. The highest activity of hydrolytic enzymes was obtained at 9 h of pre-treatment. Filter paper cellulase had a maximum activity of 0.90 IU/ml, while carboxymethyl cellulase, amylase and xylanase were produced to a maximum of about 0.40 IU/ml. The methane yield obtained after anaerobic digestion of the pre-treated pulp ranged between 0.12 and 0.24 m(3) CH4/kg VS added. The highest and lowest values were obtained for 9 and 72 h of pre-treatment, respectively. Nine hours of pre-treatment of sisal pulp prior to anaerobic digestion demonstrated a 26 % higher methane yield when compared to the sisal pulp without pre-treatment. The consortia of microorganisms in activated sludge demonstrated a useful potential in the production of hydrolases acting on major macromolecules of sisal pulp. The fact that a correlation was observed between high enzyme activity and high methane yield at 9h of aerobic pre-treatment suggests that such a short pretreatment period could be an alternative option for increasing solubilization of sisal pulp and promoting methane productivity. (c) 2005 Elsevier Ltd. All rights reserved.},
  author       = {Mshandete, Anthony and Björnsson, Lovisa and Kivaisi, AK and Rubindamayugi, ST and Mattiasson, Bo},
  issn         = {1879-2448},
  language     = {eng},
  number       = {8},
  pages        = {1569--1575},
  publisher    = {Elsevier},
  series       = {Water Research},
  title        = {Enhancement of anaerobic batch digestion of sisal pulp waste by mesophilic aerobic pre-treatment},
  url          = {http://dx.doi.org/10.1016/j.watres.2004.11.037},
  volume       = {39},
  year         = {2005},
}