Design a Recycling System
Most cities don't have a real textile recycling pipeline. In this lesson, you'll design one from scratch — collection, sorting, processing, output — for a city of your choice.
The 4 stages every system needs
Any working textile recycling system has four stages:
1. Collection: How do clothes get from people's wardrobes to a sorting centre? 2. Sorting: How are clothes separated by material, colour, and condition? 3. Processing: How are sorted clothes turned into usable output (resold, repaired, mechanically recycled, chemically recycled, downcycled)? 4. Output: Where does the final material go? Back into clothing? Insulation? Landfill (for the unrecyclable %)?
Most cities have stage 1 (donation bins) but stages 2–4 are missing or outsourced abroad. A real pipeline keeps as much as possible local — reducing shipping carbon and creating local jobs.
Real cities doing this well
A few real-world examples to learn from:
- Amsterdam, Netherlands: Textile bins on every street. Sorted at a central facility (Wieland Textiles). About 50% reused, 30% recycled, 20% downcycled. The city has a goal of fully circular textiles by 2050.
- Stockholm, Sweden: Partnership with H&M and Renewcell. Used clothes collected in stores, chemically recycled into new fibre, sometimes ending up back on H&M shelves.
- Prato, Italy: For 200 years, Prato has been a global hub for wool recycling. They sort wool by colour and re-spin it without dyeing — saving massive amounts of water and chemicals. Almost all suit-quality wool in Europe touches Prato at some point.
- France (national policy): Extended Producer Responsibility law since 2007. Clothing brands pay a small fee per garment sold. That fee funds Refashion, the national clothing recycling agency.
No city has 100% circular textiles yet. But these examples prove parts of the puzzle work.
Designing your system: key choices
When you design a textile recycling pipeline for a city, these are the decisions:
- Collection points: Curbside pickup, bins on streets, in-store drop-off, mail-in? - Funding: Tax dollars, brand fees (EPR), customer fees, donations? - Sorting tech: Manual labour, AI vision, NIR scanners — or a mix? - Local capacity: Where does the sorting facility sit? Who runs it? What skills do they need? - Output partnerships: Which brands buy your recycled fibre? Where do unsellable items go (insulation manufacturers, energy-from-waste plants)? - Public engagement: How do you teach citizens what to put in the bin and what NOT to (no shoes, no pillows, no wet clothes)?
There's no one right answer. The best systems are tailored to the city's size, climate, existing infrastructure, and local brands.
Common mistakes to avoid
When students design recycling systems, they often make the same errors:
1. Assuming the technology is the hard part. (It's not — the hard part is logistics and behaviour change.) 2. Forgetting that 30–50% of donations may be too contaminated to recycle. Plan for that. 3. Designing only for cotton or only for polyester. Real-world bins receive everything — pillows, shoes, blends, unidentifiables. 4. Ignoring funding. Without an EPR law or government subsidy, the system can't compete with cheap virgin material. 5. Skipping public education. Even good systems fail if citizens don't know how to use them.
If your design accounts for those 5 things, you've already done better than most real-world municipal systems.
Key takeaways
- Every textile recycling pipeline needs 4 stages: collection → sorting → processing → output.
- Amsterdam, Stockholm, Prato, and France's national EPR law are real working examples.
- Sorting is usually the hardest stage. NIR scanners + AI vision are starting to help.
- Funding usually comes from EPR (brand fees), tax dollars, or both.
- Behaviour change and public education matter as much as technology.
Try this
Design your city's pipeline
Pick a city you know well. On paper, design its textile recycling system. Where do bins go? Where's the sorting facility? Who funds it? What technology does it use? What % of clothes do you estimate would be reused, recycled, downcycled, or sent to landfill? Be specific.
Steal from real cities
Pick one of the cities mentioned in this lesson (Amsterdam, Stockholm, Prato, or any city with EPR like France). Search for an article or video about their textile recycling. Note 3 things they do that your city could copy. Email or post a question to your local council with one suggestion.
The customer journey map
Map every step a citizen takes from 'I have a worn-out shirt' to 'It became something new.' How many bins, transports, sorts, processes? What goes wrong at each step? Where could you make it easier? Behavioural friction is often the biggest barrier in real systems.
Which is usually the hardest part of building a textile recycling system?
Sorting and logistics are the chronic bottleneck. The chemistry of recycling exists; the engineering exists; what doesn't exist at scale is fast, cheap, accurate sorting of mixed donations into recyclable streams. Cities that crack sorting (often via AI/NIR scanners + manual triage + good public education) are the ones with working systems.