#circulareconomy

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⚙️ My latest preprint presents a thermodynamic rationale for a two-stage cascade Eutectic Freeze Crystallization (EFC) process, developed for the treatment and resource recovery of hypersaline mine water from the Svystunova Gully impoundment (published in Ukrainian). ☝️ Key highlights: 🔹 Selective phase separation: Conducting the process in two stages with inter-stage solids separation at -20.0°C provides a 2.5°C operating buffer before chloride salts begin to precipitate, ensuring clean separation of sulfate and chloride fractions. 🔹 High water recovery: The total yield of desalinated water (as pure ice) reaches 964.07 g per 1 kg of initial H2O (96.4% recovery rate). 🔹 Effluent minimization: The initial wastewater volume is reduced 62-fold, concentrating the residual components into a compact, heavy bittern. 🔗 Full preprint: https://doi.org/10.5281/zenodo.22821616 #MineWater #WaterTreatment #Geochemistry #Thermodynamics #PHREEQC #EFC #Mining #CriticalRawMaterials #CircularEconomy #SvystunovaGully #KryvyiRihBasin #FREZCHEM
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Powerful Hardware Turned into E-Waste

What you're looking at is another unfortunate example of perfectly capable hardware becoming electronic waste long before its technical lifespan is over.

This is the AirTies Air 4960, an AX5400 Wi-Fi 6 mesh extender/access point featuring impressive hardware:

  • Broadcom BCM6752 triple-core ARM Cortex-A7 SoC (up to 1.5 GHz)
  • Broadcom BCM43684 4x4 Wi-Fi 6 radio with 160 MHz channel support
  • Dual-band Wi-Fi 6 (802.11ax)
  • Two Gigabit Ethernet ports
  • Around 4.5 W power consumption

From a technical perspective, this device is still more than capable of delivering excellent performance in many home and enterprise networking scenarios.

  • The Real Issue

The hardware isn't obsolete, the software ecosystem is intentionally locked down.

Many devices like this are heavily restricted by manufacturers or Internet Service Providers (ISPs), preventing owners from repurposing them once official support ends or the service contract expires.

Meanwhile, open-source firmware projects such as OpenWrt, DD-WRT and Tomato have demonstrated for years that networking hardware can remain secure, functional, and useful far beyond its commercial lifecycle.

Unfortunately, locked bootloaders, proprietary firmware, missing documentation, and closed-source drivers often make that impossible.

Sustainability Is Also About Software Freedom

We regularly discuss sustainability, circular economy, and reducing electronic waste.

Yet perfectly functional networking equipment ends up in recycling bins, not because the hardware has failed, but because users are prevented from installing alternative software.

  • The hardware already exists.
  • The raw materials have already been mined.
  • The manufacturing energy has already been spent.

In many cases, all that's missing is the freedom to install an alternative operating system.

  • A Better Approach

I would like to see manufacturers embrace a more open ecosystem by providing:

  • Unlockable bootloaders
  • Public hardware documentation
  • Support or at least tolerance for open-source firmware
  • Longer software support lifecycles

This would benefit users, enterprises, developers, the open-source community, and ultimately the environment.

Not every retired device is obsolete, many are simply made obsolete through artificial restrictions.

#OpenSource #OpenWrt #DDWRT #WiFi6 #Networking #Sustainability #CircularEconomy #RightToRepair #EmbeddedLinux #Broadcom #eWaste #Technology

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Купив клієнт квартиру в Дігомі, стара радянська цегла. Грошей в обріз, просив мінімальний ремонт. Але я порахував: якщо не чіпати старі труби, через два роки сусідів заллє, і перепродаж впаде в нуль. Зробили демонтаж, частину цегли і дощок пустили на стелажі й підвіконня, сантехніку стару здали на метал, а нову взяли з відновлених матеріалів. Вийшло на 18% дешевше капремонту, і на оглядах ця історія добре грала - покупці бачили, що власник думав наперед. Циркулярний підхід у реновації не просто про екологію, це прямий вплив на ліквідність обʼєкта. #circulareconomy #ремонт #нерухомість
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#introduction (ENG) It took me 3 years – tells a lot more about me than a long introduction. French, born in 323 ppm, living in an old mill in Touraine. Professor (corporate finance, sustainable finance), wrote books, personal blog – mostly in French, with occasional English posts – since 2006. Love Jazz and Pop music, and my wife (all together). 10 computers at home (decreasing), 2 on Linux (for now). Fairphone + e/OS, no BigTech. #RepairCafe #Sustainability #Linux #LoRa #CircularEconomy
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☀️ Ein Photovoltaikmodul in einer zirkulären Wertschöpfung, dessen Teile im Idealfall wiederverwendet werden können, mit einem entsprechend intelligenten Design von Anfang an: Diese Vision eines „Zirkulären PV-Moduls“ verfolgt Katharina Schnatmann in ihrem Forschungsprojekt am Institut für Technische Energie-Systeme (ITES). 🔗 Mehr in unserer Pressemitteilung. https://www.hsbi.de/presse/pressemitteilungen/hsbi-promotionsprojekt-zirkulaere-nutzung-von-photovoltaik-modulen#HochschuleBielefeld #HSBI #Photovoltaik #CircularEconomy
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Może ktoś chce "moje" książki (z warszawskiej oddażowni), z których kasa idzie na pomoc potrzebującym i hmm, sprawne krążenie używanych przedmiotów? Bo już dłuuugo tam leżą, a wiersze piękne (aż kupiłam se grubszy tom) i pro-tipy idealne dla zbyt grzecznych dziewczynek z najntisów 🤪 #warszawa #screwup #twardowski #circulareconomy #poezja #warszawahttps://www.olx.pl/d/oferta/072-jan-twardowski-nie-przyszedlem-pana-nawracac-CID751-IDZakro.html https://www.olx.pl/d/oferta/150-permition-to-screw-up-CID751-IDZadcf.html
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Not everything with a cracked plastic case is destined for the bin. This Flymo came into TOG with a badly damaged outer shell. Our member Ambrose repaired it with a plastic welder, melting the plastic and embedding metal staples across the break from the inside to reinforce it. That is one of the joys of a hackerspace: shared tools, shared knowledge, and people willing to give things a second life. Blog post here: https://www.tog.ie/2026/04/bringing-a-cracked-flymo-back-to-life/ #Repair #CircularEconomy #RightToRepair #Hackerspace
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As the AI arms race accelerates, the 18-month hardware refresh cycle has transformed GPUs from simple components into high-value infrastructure assets. This article explores why selling hundreds of units—like NVIDIA’s H100 or A100—requires a shift from "peer-to-peer" thinking to "Enterprise ITAD" strategy. https://medium.com/@samlamucf/where-to-sell-gpus-in-bulk-a-practical-guide-for-ai-and-data-center-hardware-7d9c2216f020 #DataCenter #ITAD #GPU #EnterpriseTech #NVIDIA #TechStrategy #BuySellRam #CircularEconomy #AI #H100 #Blackwell #GPU #TechNews #EnterpriseAI #AssetRecovery
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RE: https://mastodon.social/@JulianOliver/116127567524494585 There are emergency brakes in the American economy, the thing is that those used to be coded in the law and regulations that come from the Roosevelt era, after de depression. Since Reagan, every government has eroded those rules, and the crisis of 2008 caught everyone but a few by surprise. What would it happen with a gung-ho administration looking to just inflate the economy for political reasons? #doomsday #circulareconomy #2008financialcrash
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