Ooijpolder
Ooijpolder

The sustainable secret of tiny organisms

How can organisms that are invisible to the naked eye contribute to reducing greenhouse gas emissions and generate electricity at the same time? Microbiologist Cornelia Welte explains this during her lecture at the celebration of International Women's Day on 10 March. ‘With our research, we are contributing to the solutions of tomorrow.’

It is well known that greenhouse gases such as CO2, methane and nitrous oxide contribute to global warming, and the call to reduce emissions has grown louder for years. One approach is to tackle the source – for example, tackling emissions from agriculture and industry. Another approach is to prevent emissions, with the help of methane-eating microorganisms.

How do you find organisms that are too small to see with the naked eye? ‘With a digital catalog of organisms in the environment, we can make an initial selection of species that feed on gases such as methane’, explains Cornelia Welte, professor of microbiology. ‘Then we go out into the field to take samples, including in the Ooijpolder near Nijmegen.’ 

Cornelia Welte

Rice paddies and water purification installations

Back in the lab, researchers examine the characteristics of suitable organisms by feeding them in a controlled environment. Two methane-eating species come in handy: organisms that live in an environment with or without oxygen. ‘The organisms that need oxygen help limit methane emissions in rice paddies, for example, while organisms that can do without oxygen are very useful in water treatment plants.’

Welte and her team are also investigating how methane-eating micro-organisms can generate electricity. By linking them to electrodes, microorganisms can convert methane into electricity. Welte emphasizes that there are still steps to be taken before the promising technology can be deployed on a large scale: ‘This could offer solutions for the problems of tomorrow, but then cooperation with engineering scientists and companies is required. It is up to us to make the discoveries that engineers can develop into practical applications.’

Lost talent

On 10 March, Welte will present a lecture during the celebration of International Women's Day. The position of women in science is close to her heart. ‘It is already difficult to increase the percentage of female professors, and that will only become more difficult with the budget cuts. The thought that young women have fewer opportunities in science pains me.’ She laments the talent that is lost if we proceed like this. ‘A country like the Netherlands also needs these talented female scientists to remain relevant as an innovative country.’

Celebration International Women’s Day

Do you like to hear more about Cornelia Welte's research? Her lecture during the celebration of International Women's Day is free to attend.

View the programme and sign up

Photo: The Ooijpolder near Nijmegen. Photographer: Gertjan van Noord via Flickr.

Contact information

Theme
Sustainability, Innovation, Molecules and materials