News Portal

It is well known that Legionella bacteria can contaminate drinking water systems in buildings. A case study published in Aqua & Gas by Eawag and the Lucerne University of Applied Sciences and Arts now shows how they can be controlled by different temperature strategies.

Making decisions about what sanitation infrastructure to implement in emergency and humanitarian crises is challenging. Research on how to support this decision-making has led to the online platform: emersan-compendium.org.

An Eawag study has shown that it makes good sense to recover domestic energy, for example from warm shower water. The study refutes concerns that this form of heat utilisation could have a negative impact on waste water treatment plants. In fact, utilising the energy closer to its source reduces energy losses in the waste-water system.

Less than four months after the groundbreaking ceremony, the foundation for the co-operate research campus of Empa and Eawag was laid today. At the ceremony in Dübendorf, representatives of all partners filled a time capsule with contemporary items in the presence of around 50 guests, thus giving the starting signal for co-operate.

In official circles, he is known as Prof. Dr. Alfred Wüest. But his fellow researchers and colleagues, simply call him Johny. When he came to Eawag in 1983, no one imagined the formative influence Johny Wüest would have on the research institute, but above all on the many people who have worked with him over the years.

There has been a floating laboratory on Lake Geneva called LéXPLORE since 2019. Natacha Tofield-Pasche, limnologist at EPFL and project leader of LéXPLORE, and Damien Bouffard, researcher at Eawag and member of the LéXPLORE steering committee, tell us what is being studied there and why this research platform is unique.

We at Eawag are particularly proud of the international composition of our employees. Dübendorf and Kastanienbaum are home to researchers, technicians, administrators and apprentices from over 40 different nations.

Toxic substances in the environment can harm the nervous system of fish embryos. Now, researchers at Eawag have developed a computer model that helps to better understand how the damage occurs.

Decisions in water management are often associated with large uncertainties. Quantifying and communicating these uncertainties is crucial for science to support transparent decision-making in society.

Sam Derrer has been Head of Vocational Training at Eawag for ten years, so he knows just how varied the apprenticeships are, and how trainees here are both supported and stretched.

It was long assumed that cyanobacteria were mainly responsible for fixing nitrogen on early Earth, thus making nitrogen available to the biosphere. In a paper published today in “Nature Communications”, a team of researchers from Germany and Switzerland now shows that purple sulfur bacteria could have contributed substantially to nitrogen fixation.

Blue-green algae and other phytoplankton are very important for the proper functioning of aquatic ecosystems. When they accumulate in high quantities, however, they can be harmful to people and animals because some blue-green algae species produce toxic chemicals. For this reason, the aquatic research institute Eawag is currently working on methods to improve the prediction of bloom events.

Salmonella infections can result in a broad spectrum of illnesses. According to the latest research findings, one reason why some cases are harmless while others are very severe lies in the intestinal flora.

A new theory supports the controversial hypothesis that the planets affect solar activity. It puts forward a mechanism by which the very small influence of the planets could exert its rhythm on such a large system as the Sun. If the theory is confirmed, it could possibly be used to predict solar activity more accurately. This would be of great interest, as large solar flares can cripple electronic infrastructure.

Each year at Eawag, around 160 Master’s and Bachelor’s students are supervised and often directly involved in research projects. Again and again, this collaboration – as well as Eawag’s flat hierarchies and interdisciplinary culture – leads to outstanding Master’s theses.

A comprehensive inventory of Swiss glacial lakes shows how the lake landscape in the high mountains has changed since the end of the Little Ice Age.

Open Science is an important development in science - open access to the results of research. Eawag supports these and makes a growing part of its research data, including descriptions, images and even software, available publicly and free of charge on the Eawag platform ERIC or, in special cases, on discipline-specific, international databases. ERIC complements the long-standing platform DORA for scientific publications.

Eawag’s practice-oriented courses (known as PEAK) provide training for professionals. Isabelle Schläppi of the PEAK Office looks back over a year marked by the COVID-19 pandemic.

Last week, around 25 guests were able to witness live - and in keeping with Corona- how the large silver key to the new Eawag building symbolically changed hands.

On July 1, Benoit Ferrari will permanently take over as director of the Ecotox Centre, which he has already led ad interim for the past two years. He will be supported by Etienne Vermeirssen, group leader of Aquatic Ecotoxicology, as deputy director.

Groundwater is also an ecosystem, but little is known about the biodiversity underground. Eawag researchers have now documented the diversity of life in Swiss groundwater in a pilot study – and discovered previously unknown species of amphipods in the process. Here they relied on a citizen science approach.

The OECD gives the green light to the fish cell line assay developed at Eawag. This paves the way for companies and authorities around the world to determine the environmental toxicology of chemicals without having to resort to animal testing.

Bacteria from an Indian landfill could help eliminate contaminated chemicals. The focus is on pesticides such as lindane or brominated flame retardants, which accumulate in nature and in food chains. Researchers at Eawag and Empa used these bacteria to generate enzymes that can break down these dangerous chemicals.

Formerly widespread, native crayfish in Switzerland are now highly endangered. With support from Eawag, experts are doing everything they can to preserve the secretive river dwellers.

Hydropower is considered to be CO2-neutral, but certain power plants in tropical regions produce large quantities of greenhouse gases. Researchers at Eawag have now studied how much carbon dioxide escapes into the atmosphere below the Kariba Dam in southern Africa. Such previously ignored emissions must be taken into account by future carbon budgets.

In the Water Hub, our scientists are researching sustainable and decentralised wastewater treatment. Here, wastewater is not regarded as waste, but as a resource. Now the research platform in NEST can be visited virtually at any time.

With the latest analytical methods, potentially toxic substances can be detected even at very low concentrations. However, the aim of research is not merely to document such contamination but also to understand how it occurs in streams and groundwater, and to propose mitigation measures.

From flood protection and drinking water supply to the revitalisation of water bodies and hydropower production – water policy in Switzerland takes place in a wide variety of sectors. However, the exchange of information between politically divided players is often difficult. Science plays an important role as a bridge builder between the camps.

Microbes self-organise to grow into fascinating and complex patterns. The diversity of these patterns depends on a previously unknown factor, as researchers at Eawag have discovered. This might re-define how we view the concept of microbial biodiversity.

The Zambezi River Basin in southern Africa is a high-quality waterscape. But current rapid development threatens the waters of the Zambezi, particularly its tributaries. The challenge will be to ensure that mitigation measures keep up with population and economic growth to avoid degradation of water quality degradation.