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Malte Hermansson

Professor

Malte Hermansson
Professor
malte.hermansson@cmb.gu.se
+46 31 786 2574

Room number: 1404/1342
Postal Address: Box 462, 40530 Göteborg
Visiting Address: Medicinaregatan 9C , 41390 Göteborg


Department of Chemistry & Molecular Biology (More Information)
Box 462
405 30 Göteborg
www.cmb.gu.se
inst.kmb@cmb.gu.se
Fax: +46 31 786 2599
Visiting Address: Medicinaregatan 9 C , 413 90 Göteborg

About Malte Hermansson

RESEARCH PROJECTS

Nitrification biofilms

”Zero eutrophication” is one of the 16 environmental quality objectives for a sustainable development decided on by the Swedish Parliament. One of the interim targets to meet the goal is to reduce emissions of nitrogen compounds into sea areas. To achieve this, an effective nitrogen removal of wastewater is needed. Nitrification is the rate limiting of the two microbiological processes that are used for nitrogen removal in wastewater treatment plants (WWTP). This project aims at providing a basic understanding of the biology of nitrification and will delivering data to be used in mathematical models that are used for process optimization. Based on our results, we have made pilot-plant testes where different practical running strategies of nitrogen loading increased the nitrification potential in the system.

Anammox bacteria can be used in alternative nitrogen removal processes. These new processes are promising in that thy save energy at the WWTP. Also, there is no need to add external carbon source. We know relatively little about the slow growing, sensitive he anammox bacteria. For the process to be used more widely in WWTP we clearly need research to improve basic biological knowledge about the anammox bacteria.

Latest publication:

Predation of nitritation-anammox biofilms used for nitrogen removal from wastewater
ACCEPTED MANUSCRIPT
Carolina Suarez, Frank Persson, Malte Hermansson
FEMS Microbiol Ecol (2015) fiv124 DOI: http://dx.doi.org/10.1093/femsec/fiv124 First published online: 15 October 2015 fiv124
Abstract Full Text (PDF) Figures & data

 

Carolina Suarez, Frank Persson (Chalmers University of Technology, Dept of Water Environ. Techn.,), Malte Hermansson


Plasmids as vectors for horizontal gene transfer in bacteria

The purpose is to study bacterial plasmids as vectors of horizontal gene transfer (HGT) between bacteria. Plasmids are important carriers of antibiotic resitance genes are involved in the spread of these genes between bacteria, even between different species of bacteria. Better knowledge about plasmids is important both for our understanding of basic bacterial evolution and adaptation, but also for understanding of routes of antibiotic resistance spreading. Since plasmids themselves are subject to frequent exchange of genetic material with genomes in their surroundings, they are mosaics of DNA with different origins. Newly developed tool are used for analyzing plasmid evolutionary history, including recombination events and host relations.

The IncP-1 plasmid backbone adapts to different host bacterial species and evolves through homologous recombination Authors: Peter Norberg, Maria Bergström, Vinay Jethava, Devdatt Dubhashi, Malte Hermansson

Summary: Plasmids are present in many bacteria and are often transferred between different species causing horizontal gene transfer. By comparing the sequences of 25 plasmid DNA backbones, the authors show that homologous recombination is prevalent in plasmids and that the plasmids have adapted to persist in different host bacteria.
Nature Communications, Volume: 2, Article number: 268

Peter Norberg, Malte Hermansson


Linking molecular biology to the operation and function of wastewater treatment plants with focus on microbial aggregates in activated sludge processes

The aim of this project is to implement molecular biological techniques to wastewater treatment plants (WWTPs) to study the microbial community structure and its dynamics and how it is connected to the treatment efficiency. The main focus is on the aggregation and flocculation properties of activated sludge biomass, which is a crucial parameter in the activated sludge process. Flocculation failure leads to loss of organic matter, nitrogen and phosphorus to the receiving waters. The studies of microbial community structure are linked to the colloidal properties of the aggregates.

Johan Fredriksson and Britt-Marie Wilen both, Chalmers University of Technology, Dept of Water Environ. Techn., Malte Hermansson


Source tracking of bacterial contaminants in drinking water

The aim of this project is to assess the microbial impact from human and animal faecal sources, using microbial source tracking as a complement to the analysis of traditional indicators and parasites.

Johan Åström and Thomas Pettersson (both Chalmers University of Technology, Dept of Water Environ. Techn.), Malte Hermansson

Latest publications

Combined Deterministic and Stochastic Processes Control Microbial Succession in Replicate Granular Biofilm Reactors
R. Liebana, O. Modin, F. Persson, E. Szabo, Malte Hermansson et al.
Environmental Science & Technology, Journal article 2019
Journal article

A variety of hydrogenotrophic enrichment cultures catalyse cathodic reactions
S. Saheb-Alam, F. Persson, B. M. Wilen, Malte Hermansson, O. Modin
Scientific Reports, Journal article 2019
Journal article

The mechanisms of granulation of activated sludge in wastewater treatment, its optimization, and impact on effluent quality
B. M. Wilen, R. Liebana, F. Persson, O. Modin, Malte Hermansson
Applied Microbiology and Biotechnology, Journal article 2018
Journal article

Effect of Start-Up Strategies and Electrode Materials on Carbon Dioxide Reduction on Biocathodes
S. Saheb-Alam, A. Singh, Malte Hermansson, F. Persson, A. Schnurer et al.
Applied and Environmental Microbiology, Journal article 2018
Journal article

The inhibitory effects of reject water on nitrifying populations grown at different biofilm thickness
Maria Piculell, Carolina Suarez, Chunyan Li, Magnus Christensson, Frank Persson et al.
Water Research, Journal article 2016
Journal article

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Page Manager: Katleen Burm|Last update: 9/20/2013
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