Bioeconomy

Further utilisation of plant residues - 25/11/2021

Novel fibre composite made from hop fermentation residues

Biogas plants produce energy-rich gas by fermenting biomass. This process generates both liquid and solid fibrous and particulate fermentation residues. Researchers at the German Institutes of Textile and Fibre Research (DITF) have now managed to create a resistant and water-repellent fibre composite material from solid hop residues that can be used as a veneer to coat wood panels.

Climate-friendly circular economy - 11/11/2021

CO2 from the air as a raw material for chemicals

A Fraunhofer team has successfully produced a dye using CO2 adsorbed from the air. The aim is to move towards a climate- and resource-friendly circular economy. Chemicals, as well as fuels, can be produced cost-effectively using this process. How does the technical process work, and what opportunities does it open up?

Researchers find the enzymatic link in the formation of methane from fatty acids by cooperating microorganisms. Microbial production of methane from organic material is an essential process in the global carbon cycle and an important source of renewable energy. This natural process is based on a cooperative interaction between different types of microorganisms: the fermenting bacteria and the methane-producing archaea.

Germany generates around 38 kilograms of plastic waste per capita each year. Researchers from the Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB and the Fraunhofer Institute for Process Engineering and Packaging IVV are now working to establish a holistic concept for the sustainable use of biologically degradable packaging materials in the cosmetics industry. The project is focusing on polyhydroxyalkanoates (PHAs).

New biomaterials developed at the University of Bayreuth eliminate risk of infection and facilitate healing processes. These nanostructured materials are based on spider silk proteins. They prevent colonization by bacteria and fungi, but at the same time proactively assist in the regeneration of human tissue. They are therefore ideal for implants, wound dressings, prostheses, contact lenses, and other everyday aids.

Time for climate protection is pressing. One approach to tackle this challenge is to use the greenhouse gas CO2 as a raw material for chemicals. The researchers of the Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB, together with partners from science and industry, were able to produce a value-added terpenoid dye from CO2 adsorbed from air by a combination of electrochemical and biotechnological conversion.

Degradable biopolymers - 29/05/2020

Bioplastics make wood cycles more sustainable

Innovative technologies and bacteria can transform wood residues into sustainable bioplastic packaging. Before bioplastics are broken down into CO2 and water in an environmentally friendly way, they can thus lead lives as products in the cosmetics industry, for example.

Electronic devices are still made of lifeless materials. One day, however, “microbial cyborgs” might be used in fuel cells, biosensors, or bioreactors. Scientists of Karlsruhe Institute of Technology (KIT) have created the necessary prerequisite by developing a programmable, biohybrid system consisting of a nanocomposite and the Shewanella oneidensis bacterium that produces electrons.

Article - 13/02/2018

Pleasant aromas from biogas

Butyric acid is an important source of fruity aromas. It accumulates as an intermediary product during biogas production, from where it can be siphoned off and used for producing flavours. A new collaborative project aims to explore the technological and bioeconomic potential of extracting butyric acid from biogas plants.

Article - 04/12/2017

Textiles: water-repellent thanks to fungal proteins

Outdoor lovers and athletes love them: water-repellent jackets and trousers. However, many consumers are unaware that the chemicals used to functionalise the textile surface often pollute the environment. Organic fluorine compounds (perfluorocarbons = PFC) are usually added to textiles to make them water-repellent. Scientists at the Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB and the Hohenstein Group are researching an…

Article - 01/09/2016

Tailor-made biotech fibres for improved wound dressings

Scientists have developed a biotechnological process to produce bacterial alginate. The alginate quality is highly reproducible, making it suitable for the production of fibre-based medicinal products such as wound dressings.

Article - 29/02/2016

Biopower made from wastewater

Researchers worldwide are working to develop new technologies for producing clean energy. A team of researchers led by Sven Kerzenmacher at the University of Freiburg's Department of Microsystems Engineering (IMTEK) is interested in combining wastewater and bacteria, an approach that is both unusual and promising.

Article - 25/01/2016

How the application of chemicals in response to oil spills can be improved

When an oil spill occurs, chemical dispersants are routinely applied to the surface of the oil-contaminated seawater or into deeper water regions. Dr. Sara Kleindienst, a molecular ecologist from the Centre for Applied Geoscience at the University of Tübingen, has now shown that chemical dispersants do not stimulate oil biodegradation. In cooperation with an international team of researchers, Kleindienst simulated the Deepwater Horizon oil well…

Article - 30/11/2015

Bacterial MccA is better than other enzymes when it comes to reducing sulphites

Dr. Bianca Hermann from the University of Freiburg specialises in multi-haem enzymes, and investigates the enzymes’ structure and reaction mechanisms. She has clarified the enzymes’ crystal structure and reaction mechanisms and found out why the bacterial MccA enzyme complex can reduce sulphur-containing substances such as sulphites up to a hundred times faster than other enzymes.

Article - 11/11/2015

A metal enzyme that can cleave benzene rings

Aromatic rings are extremely stable and very difficult to break apart. Prof. Dr. Matthias Boll from the University of Freiburg’s Faculty of Biology and his team work with Geobacter metallireducens, a bacterium that can completely degrade aromatic compounds under strictly anaerobic conditions. While the biological degradation of aromatic hydrocarbons is of global relevance, the chemical resulting from the reduction of benzene rings could also be…

Article - 08/06/2015

Biosurfactants - effective fat solvents made by bacteria

In early 2015, a company called Biotensidon GmbH from Karlsruhe established a white biotechnology subsidiary to develop a fermenter prototype for producing rhamnolipids, which are excellent bacterial surfactants. The project, which was carried out in cooperation with scientists from the Science & Technology Center in Ukraine, means that traditional petroleum-based surfactants can now be replaced by biosurfactants. The latter are extremely…

Article - 09/12/2013

Biological soil remediation: phytoremediation with plants and their associated microbes

Prof. Dr. Andreas Kappler and his team of researchers from the University of Tübingen are exploring how cadmium and other harmful metal compounds can be removed from soil. The principle is based on the ability of bacteria to break up cadmium-containing soil particles the released cadmium is then taken up by the plants and removed as the plants are pruned and disposed of.

Article - 10/06/2013

An ingenious trick of nature: bacterial toxin-antitoxin systems

Cyanobacteria, also known as blue-green algae, are the oldest known form of life and have been around for 3 billion years. It stands to reason therefore that they should be relatively simple and primitive organisms. But this is not quite the case: two scientists from the Institute of Biology III at Freiburg University, Stefan Kopfmann and Prof. Dr. Wolfgang Hess, have discovered that cyanobacteria have developed a clever natural selection…

Article - 31/05/2013

Research in Biberach – does the bioeconomy have a purple future?

Rhodospirillum rubrum bacteria have long attracted the interest of biotechnologists due to their ability to produce large quantities of pigments. Microbiologist Hartmut Grammel from Biberach University of Applied Sciences and scientists from the Magdeburg-based Max Planck Institute for Dynamics of Complex Technical Systems are studying the bacterias suitability for the fixation of CO2 with the distant objective of producing organic materials with…

Article - 03/09/2012

The Matryoshka principle of green symbiosis

Unicellular, aquatic dinoflagellates are masters of what is known as nested symbiosis. They engulf chloroplast-carrying organisms which enable them to photosynthesize sunlight. While this type of symbiotic relationship enables dinoflagellates to survive, the toxins produced by algal blooms, which typically involve dinoflagellates, can have a deadly effect on marine life. This in turn can also affect organisms that consume marine life – including…

Article - 23/07/2012

The heat is on – unknown biochemistry in extreme situations

Most of what is easily accessible has in principle already been discovered said Dr. Ivan Berg from the University of Freiburg explaining why he is investigating the metabolic pathways in extremophilic microorganisms. The researcher and his team are interested in the biochemistry of organisms living in hot volcanic springs and the Dead Sea. Examples of this are two metabolic pathways which the researchers from Freiburg discovered in organisms…

Article - 23/07/2012

Extremophilic bacteria: our distant ancestors

Thermophilic and hyperthermophilic archaea and bacteria give us an idea of the conditions under which organisms evolved as long as 3.5 billion years ago. It is still unclear whether the first cells originated on the surface of hot volcanic springs or on hydrothermal vents in oceans.

Article - 23/07/2012

Inhospitable niches are a rich source of extremozymes

At first sight nothing much seems to grow in either the Namib desert or the Antarctic. However a closer inspection of the ground a few centimetres below the surface reveals an enormous diversity of organisms. Industry is well aware of this rich source of microorganisms that have something to offer on the molecular level as well as for use in technical applications. So-called extremozymes have long been popular ingredients in cosmetics detergents…

Dossier - 23/07/2012

Extremophilic bacteria

What causes stress for some, actually speeds others like extremophilic bacteria up. They love it hot, sour or salty, toxic substances like heavy metals also do them good and even give them energy. As molecular and systems biology techniques get better and better, industry is also becoming increasingly interested in these exotic organisms. What potential does knowing the biochemistry of extremophilic bacteria have for the pharmaceutical, cosmetics…