What Actually Happens to Each?
Three terms. Three completely different end-of-life realities. But most businesses use them interchangeably.
If you’re choosing packaging based on environmental claims, you need to understand what actually happens after your customer throws it away – not just what’s theoretically possible.
Definitions Decoded
Let’s start with what these terms legally mean, because the differences matter.
Biodegradable Material that breaks down through natural processes involving microorganisms. Sounds perfect, right? The problem: there’s no standard timeframe. Something that degrades in 500 years is technically biodegradable.
Proper biodegradable packaging should meet standards like EN 13432, which requires degradation within specific timeframes under controlled conditions.
Compostable Material that breaks down into non-toxic components that can support plant growth. Critically, most compostable packaging requires industrial composting facilities with sustained temperatures of 60°C+ and controlled conditions.
Certification standards: EN 13432 (industrial compostable), OK Compost HOME (home compostable – much rarer).
Recyclable Material that can be collected, processed, and manufactured into new products. But here’s the catch: “can be” recycled is very different from “will be” recycled in practice.
UK recycling capabilities vary dramatically by council, material type, and contamination levels.
The Disposal Reality
What actually happens when packaging hits the bin?
Biodegradable Packaging in Landfill:
- Breaks down in anaerobic (oxygen-free) conditions
- Produces methane during decomposition
- Methane is 25x more potent as a greenhouse gas than CO2
- Net result: potentially WORSE for the environment than conventional plastic
Biodegradable Packaging in Proper Conditions:
- Breaks down as intended with minimal environmental impact
- But “proper conditions” rarely exist in standard waste systems
Compostable Packaging in Industrial Composting:
- Breaks down within 12 weeks
- Turns into nutrient-rich compost
- Perfect outcome – when infrastructure exists
Compostable Packaging Without Industrial Composting:
- Ends up in landfill (methane production problem)
- Contaminates recycling streams if mixed with conventional plastics
- Doesn’t break down in home compost bins (despite consumer assumptions)
UK Reality Check: Only 3.5% of households have access to industrial composting facilities. This means 96.5% of “compostable” packaging likely isn’t being composted.
Recyclable Packaging in Recycling Stream:
- Gets collected, sorted, processed into new materials
- Reduces need for virgin material production
- Established infrastructure in many areas
Recyclable Packaging That Doesn’t Get Recycled:
- Contamination from food waste
- Mixed with non-recyclable materials
- Council doesn’t accept that specific plastic type
- Sorting machinery can’t detect it (e.g., black plastic)
- Ends up in landfill despite being “recyclable”
Environmental Impact Comparison
Let’s compare lifecycle impacts for packaging that experiences typical UK disposal routes.
Biodegradable Packaging:
- ✅ Reduced fossil fuel dependency (often plant-based)
- ✅ Breaks down eventually
- ❌ Methane production in landfill
- ❌ Usually more expensive than conventional alternatives
- ❌ Performance can be inconsistent
Best for: Applications where proper biodegradation conditions exist
Compostable Packaging:
- ✅ Excellent outcome IF actually composted
- ✅ Returns nutrients to soil
- ❌ Requires industrial composting (rarely available)
- ❌ Contaminates recycling if misdirected
- ❌ Methane production if landfilled
- ❌ Consumer confusion about disposal
Best for: Businesses with access to commercial composting or operating in areas with established industrial composting infrastructure
Recyclable Packaging:
- ✅ Established collection infrastructure
- ✅ Reduces virgin material demand
- ✅ Lower processing costs than alternatives
- ✅ Familiar to consumers
- ❌ Actual recycling rates vary dramatically
- ❌ Contamination remains a problem
- ❌ Still requires proper sorting and collection
Best for: Most applications where recycling infrastructure exists and consumers understand disposal
Choosing the Right Option
The “best” environmental choice depends entirely on what happens after use in YOUR specific situation.
Questions to Ask:
1. Where are your customers located?
- Urban areas with better recycling infrastructure?
- Rural areas with limited collection services?
- Mix of both requiring flexible solutions?
2. What disposal options do they realistically have?
- Council recycling collection?
- Access to industrial composting?
- Return-to-store schemes?
3. What’s your packaging protecting?
- Food items (potential contamination issues for recycling)?
- Clean products (easier recycling pathway)?
- Items requiring long shelf life (compostable may not perform)?
4. What’s your volume?
- High volume might justify closed-loop recycling programme
- Low volume might work better with widely-available council recycling
- Niche market might benefit from compostable with customer education
Cost-Benefit Analysis Framework:
| Factor | Biodegradable | Compostable | Recyclable |
|---|---|---|---|
| Material cost | High | Very High | Medium |
| Infrastructure availability | Low | Very Low | Medium-High |
| Consumer familiarity | Low | Medium | High |
| Actual end-of-life success rate | Low | Very Low | Medium |
| Environmental impact (if disposed correctly) | Good | Excellent | Good |
| Environmental impact (if disposed incorrectly) | Poor | Poor | Medium |
Clear Labeling Obligations
Whatever you choose, clear disposal instructions are essential – and often legally required.
What Your Labels Should Include:
- Specific disposal method (“Recycle with plastic bags at supermarket collection points” NOT just “Recyclable”)
- What it’s made from (helps consumers and waste processors)
- What happens if disposed incorrectly (manages expectations)
- Regional variations if applicable (“Accepted by most UK councils” vs “Industrial composting required”)
Example – Good Labeling: “This bag is made from biodegradable polythene. Please dispose of with soft plastics at supermarket collection points. If unavailable, dispose of in general waste. Do not place in garden waste or home compost.”
Example – Poor Labeling: “Eco-friendly biodegradable packaging ♻️”
The second example creates confusion, potentially contaminates recycling streams, and doesn’t actually help the consumer dispose of it correctly.
Conclusion
The “greenest” packaging option isn’t determined by the material alone – it’s determined by what actually happens to it after use.
Compostable packaging that ends up in landfill is worse than recyclable packaging that gets recycled. Biodegradable packaging that produces methane is worse than conventional plastic that’s incinerated for energy recovery.
The right choice requires honest assessment of your customers’ actual disposal options – not just what sounds best in marketing materials.
Need help determining which option actually makes sense for your business? Our consultation includes realistic assessment of your customers’ disposal infrastructure and honest recommendations based on what will actually happen to your packaging.
Contact Trademark Polythene: 01933 460 505 | mark@trademarkpolythene.co.uk