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Sepehr Shakeri Yekta

Associate Professor, Head of Division, Docent

I am interested in the interactions between chemical and biological mechanisms involved in complex organic matter degradation during anaerobic digestion, which is important for improving efficiency and stability of biogas production processes.

Trace metals in biogas production processes

Performance of anaerobic digestion processes depend on a balanced supply of trace metals, which are required for the activity of the enzymes driving the metabolic machinery of the anaerobic microorganisms. We study the processes which control the chemical speciation and bio-uptake of trace metals in biogas reactors.


Molecular level characteristics of organic matter in biogas reactors

The nature of organic compounds in anaerobic digestion processes determines the degree of the organic matter conversion to biogas. We study molecular-level characteristics of underutilized organic matter in biogas reactors to further improve their degradability and thus, the biogas production efficiency

Publications

2024

Axel Lindfors, Mats Eklund, Anna Brunzell, Erik Erjeby, Tomas Hirsch, Jonas Ammenberg, Stephanie Cordova, Roozbeh Feiz, Marcus Gustafsson, Maria Johansson, Emma Lindkvist, Thomas Prade, Anna Schnürer, Karin Tonderski, Sepehr Shakeri Yekta (2024) Världens bästa biogassystem: Ett BRC innovationsprojekt
Chen Luo, Gustav Pajala, Sepehr Shakeri Yekta, Sayantan Sarkar, J. Val Klump, Paras Pujari, Joyanto Routh (2024) Soil contamination caused by fly ash from coal-fired thermal power plants in India: Spatiotemporal distribution and elemental leaching potential Applied Geochemistry, Vol. 170, Article 106080 (Article in journal) Continue to DOI
Mette Axelsson Bjerg, Eva-Maria Ekstrand, Ingrid Sundgren, Sepehr Shakeri Yekta, Jan Moestedt, Annika Björn (2024) Moderate thermal post-treatment of digestate to improve biomethane production from agricultural- and food waste Bioresource Technology Reports, Vol. 27, Article 101887 (Article in journal) Continue to DOI
Thuane Mendes Anacleto, Betina Kozlowsky-Suzuki, Annika Björn (Fredriksson), Sepehr Shakeri Yekta, Laura Shizue Moriga Masuda, Vinicius Peruzzi de Oliveira, Alex Enrich Prast (2024) Methane yield response to pretreatment is dependent on substrate chemical composition: a meta-analysis on anaerobic digestion systems Scientific Reports, Vol. 14, Article 1240 (Article in journal) Continue to DOI
Helena Rodrigues Oliveira, Betina Kozlowsky-Suzuki, Annika Björn (Fredriksson), Sepehr Shakeri Yekta, Cristiane Fonseca Caetano, Erika Flavia Machado Pinheiro, Humberto Marotta, Joao Paulo Bassin, Luciano Oliveira, Marcelo de Miranda Reis, Mario Sergio Schultz, Norberto Mangiavacchi, Viridiana Santana Ferreira-Leitao, Daniel Oluwagbotemi Fasheun, Fernanda Geraldo Silva, Igor Taveira, Ingrid Roberta de Franca Soares Alves, Julia Castro, Juliana Velloso Durao, Juliana Guimaraes, Mariana Erthal Rocha, Marina Tomasini, Pedro Vitor de Oliveira Martins, Rogerio Presciliano, Stella Buback dos Santos, Tamires Marques Faria, Tarcisio Correa, Thiago de Nuno Mendes Pery de Linde, Fernanda Abreu, Alex Enrich Prast (2024) Biogas potential of biowaste: A case study in the state of Rio de Janeiro, Brazil Renewable energy, Vol. 221, Article 119751 (Article in journal) Continue to DOI

News

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They found the bacteria that like fat

Fat in a biogas reactor behaves as it does at home in the kitchen: it’s sticky and clogs things up. The researchers at the Biogas Research Center, however, have discovered a helping hand, a bacterium that can break down the troublesome fat molecules.
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SEK 20 million for sustainable development

Eight LiU researchers will each receive approx. SEK 3 million for research relating to sustainable development. One of the research projects will answer the question: Which is better and cheaper: renovation or demolition and new construction.

Research & Teaching

Teaching

Teaching in environmental science program and following courses:

  • Biogas process
  • Designing environmental studies
  • Environmental monitoring
  • Global biogeochemical cycles
  • Environmental Chemistry.

Research 

Improved hydrolysis as a means to increase the overall degradability of organic material in anaerobic digestion for biogas production.
Project Leaders: Annika Björn 

Collaborators

  • Biogas Research Center (BRC) Linköping University
  • Swedish Energy Agency
  • BRC partners and members including Scandinavian Biogas Fuels AB, Tekniska Verken i Linköping AB, Nordvästra Skånes Renhållnings AB, Swedish Biogas International AB, Västblekinge Miljö AB

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