Tech
From sewer to furnace: How wastewater sludge is greening steel production
By turning wastewater sludge into biocoal and green hydrogen, EU researchers are helping reduce the steel industry’s environmental impact.
What comes out of our wastewater treatment plants may not be very appealing, but the real problem is what is left behind after water treatment. Wastewater plants produce a liquid sludge that is usually dried and then burned or dumped. This is costly, polluting, and has long been considered wasteful.
A group of researchers see it differently. This sludge, they argue, could become an unlikely ally in the fight against climate change—a feedstock for producing the hydrogen and carbon needed to make greener steel.
“This sludge has value, it is not just waste,” said David Chiaramonti, professor of energy systems, energy economics and bioeconomy at the Polytechnic University of Turin in Italy. “With it we can create things like carbon and hydrogen.”
Towards green steel
Chiaramonti is leading an EU research initiative called H2STEEL that brings together academics and steel industry experts from France, Italy, the Netherlands, Spain and the UK. Their goal is to design a process to extract the useful materials from wastewater sludge so that they can be reused and help reduce the steel industry’s emissions.
Steel production is essential for everything from airplanes and cars to buildings and wind turbines. It is also a major driver of climate change.
According to a 2023 report by the International Energy Agency, the steel sector alone accounts for 8% of global CO2 emissions. By comparison, the aviation industry emits about 2.5% of global CO2 emissions.
Cutting these emissions is particularly difficult. Steelmaking is complex and typically requires carbon-rich ingredients, which inevitably release greenhouse gases. That makes it one of the hardest industries to decarbonize—and one of the most expensive to transform.
Traditional steel production methods face increasing carbon pricing pressures across Europe under the EU’s Emissions Trading System. According to market forecasts, carbon prices could reach €120–150 per metric ton of CO2 by 2030, potentially adding significant costs per ton of steel produced.
For a global steel market worth more than €2.5 trillion annually, finding affordable low-carbon alternatives is urgent.
Hot sludge
This is where H2STEEL comes in. “It’s a good example of the circular economy,” said Chiaramonti. “We take a little-used resource, wastewater sludge, and make it useful again.”
The process works in two main steps. First, sludge is heated without oxygen to create biocoal, in a process called “carbonization.” Then methane from biogas plants is processed using this biocoal as a catalyst to produce hydrogen.
During this process, the biocoal becomes even richer in carbon, making it valuable for steelmaking. Another by-product, phosphorus, is separated for use in fertilizers.
Both outputs—hydrogen and carbon-rich biocoal—could help make steel cleaner. Traditional steelmaking burns coal with iron ore, releasing CO2. With H2STEEL’s approach, hydrogen can replace some of that coal. Meanwhile, the biocoal substitutes regular coal, turning waste into a useful industrial input.
The team is now building a 4-meter-tall processing machine in Turin to demonstrate the technology. “We break the biomethane into carbon and hydrogen by using the carbonized sludge at 900°C,” explained Chiaramonti. “That’s how we turn it into biocoal and circular hydrogen.”
Carbon and hydrogen
Official results are not available yet for the project, which will finish in March 2026, but the potential is significant.
Decarbonizing steel is attracting intense research efforts, from electrical furnaces to hydrogen-based processes. H2STEEL’s sludge-based approach could slot into this wider transformation.
“This technology is very flexible,” said Jan Wiencke, team leader for sustainable carbon at steelmaker ArcelorMittal’s research center in Maizières, northern France.
Headquartered in Luxembourg, ArcelorMittal is the second-largest steel producer in the world.
The company is also a partner in the H2STEEL project and hopes to be able to use the technology being developed at their steel plants.
“Whether we use a hydrogen furnace or an electrical one, we will still need ingredients like carbon and hydrogen in our processes,” said Wiencke.
“With this technology we can already reduce emissions now, and it will continue to be useful in the future.”
Other partners include Leiden University in the Netherlands and Imperial College London.
Next steps
One of H2STEEL’s biggest advantages is speed. If trials succeed, the technology could be rolled out within a few years—unusually fast in an industry where infrastructure changes often take decades.
Still, challenges remain. “We need to secure the sludge, transform it, and deliver it to the steel plants,” said Chiaramonti. Setting up supply chains and minimizing costs will be crucial.
ArcelorMittal, which aims to be carbon neutral by 2050, is watching closely. “This is a great technology for the steel industry, but it must prove itself economically,” said Wiencke.
A patent is already pending, and the partners are eager to see results from the demonstrator. “What we’re doing looks very promising,” said Chiaramonti. “Now it’s a question of taking the last steps.”
If successful, H2STEEL could deliver more than a technical breakthrough. By turning waste into valuable raw materials, it embodies the principles of the circular economy, helping Europe stay competitive while moving closer to its net-zero goals.
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Tech
Europe’s Online Age Verification App Is Here
The European online age verification app is ready.
The app works with passports or ID cards, is built to be “completely anonymous” for the people who use it, works on any device (smartphones, tablets, and PCs), and is open source. “Best of all, online platforms can easily rely on our age verification app, so there are no more excuses,” said European Commission president Ursula von der Leyen at a press conference on Wednesday. “Europe offers a free and easy-to-use solution that can protect our children from harmful and illegal content.”
High Expectations
“It is our duty to protect our children in the online world just as we do in the offline world. And to do that effectively, we need a harmonized European approach,” von der Leyen said at Wednesday’s press conference. “And one of the central issues is the question, how can we ensure a technical solution for age verification that is valid throughout Europe? Today, I can announce that we have the answer.”
This answer takes the form of an open source app that any private company can repurpose, as long as it complies with European privacy standards and offers the same technical solution throughout the European Union. The user downloads the app, agrees to the terms and conditions, sets up a pin or biometric access, and proves their age through an electronic identification system, or by showing a passport or ID card (in which case biometric verification is also provided). The app does not store your name, date of birth, ID number, or any other personal information, according to the European Commission—only the fact that you are over a certain age.
After that, when a person using the app wants to access a social network (minimum age: 13), pornographic site (minimum age: 18), or any other age-protected content, if they are logged in from a computer, they need only scan the QR code shown on the site they want to visit. If, on the other hand, the person logs in from a smartphone, the app sends the proof of age directly. The platform does not access the document with which the user proved it in the first place.
Adoption Event
The need to introduce a common system for the entire European Union has been discussed for some time, and according to commission technicians, the technical work is now complete. Of course, it will still be possible to circumvent the system—all it takes is for an adult to lend their phone to a younger friend—but the technological architecture exists, and it will be up to EU member states to decide whether to integrate it into national digital wallets or develop independent apps.
“No More Excuses”
For the app to really be effective, platforms must be obligated to verify the age of their users—that’s where things get tricky. The Digital Services Act, which went into effect in 2024, requires “very large online platforms”—those with more than 45 million monthly users in the European Union—to take concrete steps to mitigate systemic risks related to child protection, with heavy penalties for noncompliance.
“And that’s why Europe has the DSA: to call online platforms to their responsibilities. Because Europe will not tolerate platforms making money at the expense of our children,” European Commission executive vice president Henna Virkkunen told a press conference. She added that after an investigation into TikTok, the European institutions plan to take similar action against Facebook, Instagram, and Snapchat, as well as four porn sites. “Since the platforms do not have adequate age verification tools, we developed the solution ourselves,” he concluded. In short, as von der Leyen also remarked, “there are no more excuses.”
Bare Minimum
So far, this is the European framework that sets the general rules. On this basis, member states can consider more restrictive measures. Italy was among the first to discuss how to regulate the use of social media by minors but has so far not landed on anything concrete. Elsewhere in the EU, France’s Emmanuel Macron has been a trailblazer on the issue, pushing France to discuss a rule to ban social networks for minors under the age of 15 entirely. So far, this measure has received broad political support—but the outcome depends largely on compatibility with the Digital Services Act and the availability of effective age verification systems like the app the European Commission just released.
This article originally appeared on WIRED Italia and has been translated.
Tech
Anthropic Plots Major London Expansion
Anthropic is moving into a new London office as it seeks to expand its research and commercial footprint in Europe, setting up a scrap between the leading AI labs for talent emerging from British universities.
The company, which opened its first London office in 2023, is moving to the same neighborhood as Google DeepMind, OpenAI, Meta, Wayve, Isomorphic Labs, Synthesia, and various AI research institutions.
Anthropic’s new, 158,000-square-foot office footprint will have space enough for 800 people—four times its current head count—giving it room to potentially outscale OpenAI, which itself recently announced an expansion in London.
“Europe’s largest businesses and fastest-growing startups are choosing Claude, and we’re scaling to match,” says Pip White, head of EMEA North at Anthropic. “The UK combines ambitious enterprises and institutions that understand what’s at stake with AI safety with an exceptional pool of AI talent—we want to be where all of that comes together.
UK government officials had reportedly attempted to coax Anthropic into expanding its presence in London after the company recently fell out with the US administration. Anthropic refused to allow its models to be used in mass surveillance and autonomous weapon systems, leading to an ongoing legal battle between the AI lab and the Pentagon.
As part of the expansion, Anthropic says it will deepen its work with the UK’s AI Security Institute, a government body that this week published a risk evaluation of its latest model, Claude Mythos Preview. According to Politico, the UK government is one of few across Europe to have been granted access to the model, which Anthropic has released to only select parties, citing concerns over the potential for its abuse by cybercriminals.
The increasing concentration of AI companies in the same London district is an important step in creating a pathway for research to translate into AI products, says Geraint Rees, vice-provost at University College London, whose campus is around the corner from Anthropic’s new office.
“This cluster didn’t emerge from a planning document. It grew because serious researchers and companies understand that proximity isn’t a nice-to-have,” he said last month, speaking at an event attended by WIRED. “That’s how the innovation system actually works. It’s not a clean, linear transfer from lab to market. It’s messier, richer, more human than that.”
Tech
CYBERUK ’26: UK lagging on legal protections for cyber pros | Computer Weekly
The increasingly long-in-the-tooth Computer Misuse Act (CMA) of 1990 remains an albatross around the neck of British cyber security professionals, and even though the UK government committed last December to reforming it, every minute of delay is holding back the nation’s security innovation, resilience, talent, and ability to defend itself against cyber attacks, campaigners have warned.
Ahead of the National Cyber Security Centre’s (NCSC’s) upcoming CYBERUK conference in Glasgow, the CyberUp Campaign for reform of the Computer Misuse Act (CMA) has published a new report, titled Protections for Cyber Researchers: How the UK is being left behind to maintain pressure on Westminster.
The CMA defines the vague offence of unauthorised access to a computer, which the campaigners want changed because it was written 35 years ago and fails to account for the development of the cyber security profession, and the fact that in the course of their day-to-day work, cyber pros may sometimes need to hack into other systems.
“Cyber attacks are growing in scale, sophistication and severity, with a devastating impact on infrastructure, businesses and charities,” said a CyberUp campaign spokesperson.
“While other countries have moved to refresh their cyber laws in response, the UK’s Computer Misuse Act hasn’t been updated since before the modern internet – hardly the best platform for accelerating our defences into the next decade.”
The group’s report highlights how other nations, Australia, Belgium, France, Germany, Hong Kong, Malta, Portugal, and the USA, have already secured legal protections for cyber professionals that enable them to go about their business without fear of prosecution.
In Portugal – Britain’s oldest formal ally under a treaty dating back to the 14th Century – the government last year published Decreto-Lei 125/2025, implementing the European Union (EU) Network and Information Systems (NIS2) Directive and revising the country’s cyber crime law to ensure that ethical hackers and professional cyber security practitioners working in good faith are both recognised and protected.
Portgual’s laws now accept some elements of cyber work may have to happen without explicit permission or involve unanticipated technical overreach that has a legitimate purpose.
As such, Portugal says that security work undertaken in good faith won’t be punished as long as the researcher fulfills a set of conditions. For example, they can act only to find vulnerabilities and these must be reported immediately, they must avoid taking harmful actions, like conducting DDoS attacks or installing malware, and they must respect the integrity of any data they may find or access and delete it within 10 days once the issue is addressed.
CyberUp said Portugal’s example demonstrates how cyber crime laws can be modernised to legally protect research carried out in the public interest.
“Portugal has demonstrated how to modernise their equivalent law through cyber legislation. We urge the government to follow this example and act swiftly through the Cyber Security and Resilience Bill to achieve meaningful reform, or risk lagging even further behind our peers,” the spokesperson said.
Defence Framework
Working with cyber security experts and legal advisors, the CyberUp campaign has developed its own Defence Framework that would allow cyber professionals to present a statutory defence in court as long as they adhere to the Framework’s four core principles.
- Harm Vs. Benefit: The benefits of the activity must outweigh the potential harms;
- Proportionality: Cyber pros must take all reasonable steps to minimise the risks of their activity;
- Intent: They must act honestly, sincerely, and clearly direct themselves towards improving security;
- Competence: Their qualifications and professional memberships should demonstrate they are suitably equipped to perform cyber security work.
The campaigners say this framework will bring clarity and confidence to the security sector, enabling cyber pros to run essential research tasks without fear of criminal prosecution, helping organisations operate to recognised legal standards, and enabling a more open and collaborative relationship between the cyber sector and the UK government.
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