Tag Archive for: sustainability

Coworking, Chemistry & Supporting Sustainabilty

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Behind The Scenes with AristEng

Every day, industries churn out massive amounts of waste: organic, chemical, and everything in between. AristEng, an engineering consulting firm, believes that this waste could become the starting point for something valuable.

Headquartered in Luxembourg, AristEng also operates from Stone Soup coworking in Athens. The company was founded in 2021 by Evangelos Delikonstantis and Stavros Theofanidis, two close friends and colleagues with a strong passion for research and dedication to chemical engineering.

team of chemical engineers coworking office

The company specializes in chemical process design, particularly within the framework of the circular economy, waste valorization, and sustainable product development. Their work spans a range of services, including environmental, techno-economic, and social impact assessments, as well as circularity analysis, market research, and business modeling.

“We try to come up with greener processes. Greener process steps that produce something in a more environmentally friendly and economically viable way.”


AristEng operates largely within the framework of European Union-funded projects, collaborating with a wide network of companies, universities, research institutes, and technology end users across Europe. They contribute their expertise through research partnerships in project consortia, proposal writing, and outsourced consultancy to those seeking specialized knowledge.

While the company might be small—currently a team of ten—its impact is growing. With offices already in Luxembourg, Athens, and Kozani. AristEng is scaling up sustainably, step by step, one project at a time.

Turning Waste Streams into Cleaner Energy Solutions

One of AristEng’s recent projects—led by Chemical Engineer Kostas Stergiou—involves forest biomass. Forest biomass, such as wood, enters a pyrolysis reactor to produce bio-oil and other valuable by-products. AristEng’s role is to analyze what should happen to the gas and liquid by-products generated during this process. Rather than letting those go to waste, the team investigates how to valorize them, transforming them into useful resources like electricity, methanol, or even hydrogen.

Of course, this kind of transformation isn’t simple. It requires heat, electricity, and carefully designed systems to ensure the environmental and financial benefits truly outweigh the costs. AristEng performs full life-cycle assessments, helping determine if each innovation is technically feasible, environmentally sound, and economically viable.

“Our job is to find out: Is it technically possible? Is it environmentally better than what we currently do? Is it financially viable?”

Spyros Kyrimis from the team is evaluating a new configuration for cooling cycles (used in refrigeration and air conditioning) designed to use less energy and produce fewer emissions. Here again, AristEng provides the environmental, economic, and circularity assessments needed to determine whether the new system could compete with or even replace existing technologies.

Rebecca and Spyros discussing AristEng the sustainable startup

Greener Futures, Pushing Sustainability Forward

Through the team’s expertise and experience in multi-level chemical design and assessment, AristEng plays a crucial role in providing the EU and its partners with the scientific, technical, and business intelligence needed to drive energy transitions. The results of these research projects often feed into policy development, green infrastructure investments, and industrial-scale implementation.

In short, AristEng is helping Europe go green—not just ideologically, but strategically.

sustainable processes

How Coworking Supports Sustainability

We asked Spyros Kyrimis how being based at Stone Soup Coworking supports their work:

“The daily interactions with the welcoming Stone Soup team and fellow coworkers adds a unique energy to our workday. Combined with the comfortable setup and the inspiring view over Athens’ urban landscape, it creates an environment that truly fosters productivity and collaboration.”

One of the great strengths of coworking is its versatility. It’s not built for just one type of company, startup, or individual. Instead, it fosters a flexible, evolving community—making it an ideal environment for sustainability-focused teams like AristEng.

But coworking spaces don’t just support teams working on sustainability—they actively contribute to it. The connection between coworking and sustainability is increasingly clear, as shared workspaces help reduce overall resource consumption, minimize waste, and encourage more efficient use of energy and infrastructure.

coworking community


Creating your own private office the way you want it to be!

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What happens when four friends decide to share a private office in a coworking space? To start with, they let their creativity flow when it comes to naming their group. Jojo, Kourou, OBA, and Vagos are the Cobra Kai team! Thanks to the flexibility a coworking space provides, these four friends who work remotely decided to get a private office at Stone Soup and focus on their projects together. When all you need is workspace and everything else is serviced, professionals can decide to join a coworking community instead of staying at home or returning to their fixed office.

The team in their private office

Bringing diversity in a private office

Remote work and freelancing are two great ingredients in any recipe for flexibility and diversity. In this view, a shared private office is like a mini coworking space on its own! All you need is to gather your group of friends from school, university, or RPG games and get together in a workspace as Cobra Kai did! This way socialization is guaranteed as you can see a friendly face every time you focus on your projects. 

Although they decided to enter a private office because they are long-time friends and not due to their professions, they have formed a truly interdisciplinary group. Apart from bringing some retro martial vibes to Stone Soup, the Cobra Kai dojo works in very innovative fields. Kourou is a front-end developer and works in data visualization while Vagos is an EU official specializing in cybersecurity. Jojo is a linguist and editor and OBA is a mathematician and works as an R&D consultant in machine learning.

In their own words: “Self-employed and working remotely. Some coding, some editing, tons of online meetings.”

Shared private office at Stone Soup

Benefits of a sharing your own space

For them, getting a private office and sharing it “seemed like a good idea to avoid the everyday loneliness of home office”. This way it is much easier to catch up and stay in touch with your close friendly network. Moreover, having some cool company nearby is definitely helpful. This way you can share your personal and professional troubles with people you trust and listen to. Creativity and problem-solving get a boost as well since good brainstorming is just a couple of words away! And a tricky conversation piece does not have to do only with personal matters! For the Cobra Kai group, “illusions of deep political discussions“ is what brings them together as well!

Sharing a private office has been quite a positive experience for this group of friends so far, and they believe there are even better days to come. And if you are still wondering what is up with the name they gave to themselves, all we know is that “Yannis is a ninja. The rest of us have Netflix and just hate the Larussos!”

The Cobra Kai logo