anaerobic digestion of cellulose and hemicellulose in the presence of humic acids

198 Pages·2012·4.71 MB·English

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16
Propositions

(cid:881). Addition of hydrolytic enzymes helps to mitigate humic acid inhibition of
anaerobic digestion of cellulose and hemicellulose.
(this thesis)

(cid:882). The inhibitory concentration of humic acids depends on their chemical
structure.
(this thesis)

(cid:883). Unreproducible results in preclinical sciences reflect the perpetual struggle of
researchers to find fair funding (Inspired by Collins FS, Tabak LA ((cid:882)(cid:880)(cid:881)(cid:884)) NIH
plans to enhance reproducibility. Nature (cid:885)(cid:880)(cid:885): (cid:886)(cid:881)(cid:882)–(cid:886)(cid:881)(cid:883)).

(cid:884). Speculations about extra-terrestrial life on other planets challenge scientists to
rethink the unexplored species on Earth.

(cid:885). Solitude is enhancing creativity in art, but not in science.

(cid:886). Equal career opportunity in science and life for all gender and race can only be
obtained via persistent solidarity against otherisation.

(cid:887). Increased frequency of meetings with supervisors is a good indicator of mutual
discontentment about on-going research.

(cid:888). Not all people need good weather to enjoy and explore life.

Propositions belonging to the PhD thesis entitled “Anaerobic digestion of cellulose and
hemicellulose in the presence of humic acids”.
Samet Azman
Wageningen, (cid:881)(cid:884) December (cid:882)(cid:880)(cid:881)(cid:886)
Anaerobic digestion of cellulose and hemicellulose in
the presence of humic acids
Samet Azman
Thesis committee
Promotors
Prof. Dr Alfons J.M. Stams
Personal chair at the Laboratory of Microbiology
Wageningen University
Prof. Dr Grietje Zeeman
Personal chair at the Sub-department of Environmental Technology
Wageningen University
Co-promotor
Dr Caroline M. Plugge
Associate professor, Laboratory of Microbiology
Wageningen University
Other members
Prof. Dr Gerrit Eggink, Wageningen University
Prof. Dr Huub Op den Camp, Radboud University Nijmegen, The Netherlands
Prof. Dr Gert-Jan W. Euverink, University of Groningen, The Netherlands
Prof. Dr Sabine Kleinsteuber, Helmholtz Centre for Environmental Research, Leipzig,
Germany
This research was conducted under the auspices of the Graduate School for Socio-
Economic and Natural Sciences of the Environment (SENSE).
Anaerobic digestion of cellulose and hemicellulose in
the presence of humic acids

Samet Azman

Thesis
submitted in fulfilment of the requirements for the degree of doctor
at Wageningen University
by the authority of the Rector Magnificus
Prof. Dr A.P.J. Mol,
in presence of the
Thesis Committee appointed by the Academic Board
to be defended in public
on Wednesday 14 December 2016
at 1:30 p.m. in the Aula.
S.Azman
Anaerobic digestion of cellulose and hemicellulose in the presence of humic acids
(cid:881)(cid:889)(cid:886) pages
PhD thesis, Wageningen University, Wageningen, NL (2016)
With references, with summaries in English and Dutch
ISBN: 978-94-6257-961-3
DOI: 10.18174/392752
Table of Contents
Chapter (cid:881) General Introduction (cid:881)
Chapter (cid:882) Presence and role of anaerobic hydrolytic (cid:881)(cid:885)
microbes in conversion of lignocellulosic biomass
for biogas production
Chapter (cid:883) Mitigation of humic acid inhibition on anaerobic (cid:884)(cid:887)
digestion of cellulose by addition of various
cations
Chapter (cid:884) Effect of humic acids on the activity of pure and (cid:886)(cid:881)
mixed methanogenic cultures
Chapter (cid:885) Microbial community dynamics in five replicate (cid:887)(cid:889)
CSTRs during start-up period with transient
feeding strategy to achieve anaerobic digestion of
cellulose and xylan
Chapter (cid:886) Microbial community dynamics in CSTRs (cid:881)(cid:880)(cid:883)
degrading cellulose and xylan in the presence or
absence of humic acid under anaerobic
conditions

Chapter (cid:887) General Discussion (cid:881)(cid:883)(cid:883)

Appendices (cid:881)(cid:884)(cid:885)
References (cid:881)(cid:884)(cid:887)
Summary (cid:881)(cid:887)(cid:885)
Samenvatting (cid:881)(cid:887)(cid:887)
About the author (cid:881)(cid:887)(cid:889)
Author affiliations (cid:881)(cid:888)(cid:880)
List of publications (cid:881)(cid:888)(cid:881)
Acknowledgements (cid:881)(cid:888)(cid:883)
SENSE diploma (cid:881)(cid:888)(cid:887)

Chapter 1

General Introduction
Samet Azman