Department of Environmental Microbiology - School of Biotechnology

collectiveyazooBiotechnology

Feb 12, 2013 (4 years and 8 months ago)

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Research in environmental microbiology concerns microbial

processes in the environment and their applications in
society.

There are numerous microbial reactions taking place in

nature, and by learning and understanding these
processes one can mimic them and use them to keep the environment clean from

pollution and waste. Typical
applications are bioremediation, water and wastewater treatment Drinking water is a scarce world resource; the treatment
of water to render it fit for human consumption has become a problem of central importance, both in developing and in
developed countries. In developing countries, the quality of drinking water is often insufficient and hazardous to health.
KTH School of
Biotechnology
Department of
Environmental

Microbiology
Head
of Department: Prof. Gunnel Dalhammar
Prof.
Gunnel Dalhammar
(
gunnel@biotech
.
kth
.se
)
Dr.
Gunaratna Kuttuva Rajarao
(
gunar@biotech
.
kth
.se
)
One
PhDstudent
Partners and PhD students in Ethiopia, Uganda, Tanzania,
Iran, and Belgium
Funding
VR, EU, VINNOVA, Industry, KTH
During the years to come environmental microbiology will focus
its research in the development of active filters to be used in
water and wastewater treatment. The water treatment filter will
be developed using active components from natural sources for
floculation
and with an antimicrobial effect. The filters for
wastewater treatment will be based on
biofilm
processes using
very effective micro-organisms for the removal of various
nutrients from the wastewater. In addition BIO EARN programme
will continue for a few more years. Wastewater processes
developed during phase 1 and 2 of the programme will be tested
in pilot and full scale in Uganda and Ethiopia as well as in Iran.
Collaborations:
EU
BioMade
,
BiMac

Research Group
August 2006
The picture shows an
oxisk
tank
in the green house in
Överjärva
.
Two microscopic Pictures show sludge in the
Process in
Overjärva
a) phase contrast
b) FISH showing
Nitrosomonas
Recent references:
Ghebremichael
K
Gunaratna
KR, and
Dalhammar
G (2006).
Single-step ion exchange purification of the coagulant protein from
Moringa

oleifera
seed. Applied
Microbiol
.
Biotechnol
. 70(5):526-
32
Gunaratna
K
Rajarao

Charlotta

Andersson
,
Kebreab
A
Ghebremichael
and
Gunnel

Dalhammar
2006. Immobilization of
coagulant protein for drinking water clarification (submitted)
Guro

Mork

Johnsen

Gunaratna
K
Rajarao
and
Gunnel

Dalhammar
.
2006. Effects of carbon sources on phosphate uptake by
denitrifying bacteria
Comamonas

denitrificans
. IWA conference
proceedings.
Gunaratna
K
Rajarao

Charlotta

Andersson
,
Kebreab
Ghebremichael
and
Gunnel

Dalhammar
(2006). Purification and
immobilization of natural coagulant for water treatment. 2nd IGC
conference proceedings
Sofia
Andersson
,
Fantahun

Misganaw
,
Seyoum

Leta
and
Gunnel
Dalhammar
(2006). Evaluation of nitrogen removal in a small-
scale system for biological treatment of tannery wastewater. 7th
Spec.
Conf.on
small Water and Wastewater Systems proc.
Sofia
Andersson
and
Gunnel

Dalhammar
, 2006.
Bioaugmentation
for enhanced
denitrification
in a lab-scale treatment system. The
Second IASTED Int. Conf. on advanced
techn.in
the
env
. field
proc..
Larsdotter
K. (2006) Wastewater
treatnment
with
microalgae
- a
literature review.
Vatten
62
Anna

Norström
,
Gunnel

Dalhammar
and
Natuschka
Lee, 2006.
Investigation of the microbial composition in the
hydroponic
step
of a small treatment system for domestic wastewater with
fluorescence in situ hybridization (FISH). IWA conference
a
b
During the last decade the group of environmental
microbiology has been part of three national and
international programmes:
In
STAMP
(control and operation of wastewater treatment
systems), research was focused on nitrogen removal and the
development of toxicity tests and biosensors.
In
Sustainable Urban Water Management
, an integrated
wastewater treatment system using green plants with their
roots directly in the water (hydroponics) in addition to the
traditional biological processes has been constructed and
investigated.
In
BIO-EARN
(Biotechnology for East Africa Region), the
main objectives are introduction and optimisation of
wastewater treatment systems in East Africa.
In addition to these programmes molecular biology
techniques have been used for the identification and
characterisation of key organisms in the processes. Hundreds
of bacteria have been isolated and identified. One main topic
during the past few years have been the purification of
active components isolated from natural sources in order to
be able to develop new tools for the treatment of water.
Royal
Institute
of Technology
AlbaNova University Center
SE-106 91 Stockholm
Sweden
www.biotech.kth.se