Bio-based, biodegradable, compostable: what do these labels really mean?

You are standing in a supermarket. The packaging says “compostable.” The one next to it says “bio-based.” Another says “biodegradable.” You assume they mean the same thing — sustainable, natural, good for the planet. So you put one in the recycling bin. Or maybe the compost bin. Or you hesitate, unsure which is right.

You are not alone. A 2017 survey in Germany found that 58% of consumers believed all bioplastics were compostable — consumer research confirms this misconception repeatedly (European Environment Agency, 2021). The confusion is not a minor inconvenience either. Wrong disposal contaminates recycling streams, sends material to landfill, and erases every environmental benefit these labels promise.

This post cuts through the confusion. We define exactly what each label means, explain what to do with each type of material, tackle the greenwashing debate, and show why better labels alone are not enough — the recycling infrastructure behind them matters just as much. That is the challenge MoeBIOS exists to solve.

The short answer: bio-based, biodegradable and compostable are not synonyms

The word “bioplastic” covers materials that are either bio-based, biodegradable, or both. These three characteristics are fully independent. Mixing them up leads directly to wrong disposal decisions and misplaced environmental expectations.

Here is the simplest way to understand the distinction:

• Bio-based describes where a material comes from — renewable biological resources, not fossil fuels.
• Biodegradable describes what happens at end of life — microorganisms can break it down.
• Compostable is a specific, certified subcategory of biodegradable — it breaks down within a defined timeframe under defined conditions.

A material can be any combination of these. Bio-based but not biodegradable. Biodegradable but not bio-based. Compostable but made from fossil resources. This matrix is the foundation of everything else in this post.

Question 1: What is the difference between bio-based, biodegradable and compostable?

Bio-based: it is about origin, not end of life

A bio-based plastic draws its carbon wholly or partially from renewable biological sources — corn starch, sugarcane, cellulose, or agricultural by-products — rather than crude oil or natural gas. The key word is origin.

Bio-based says nothing about what happens after use. Manufacturers can design a bio-based plastic to be just as durable and non-degradable as conventional petroleum plastic. Bio-based PET, found in some beverage bottles, is chemically almost identical to fossil-based PET. It needs recycling through the same plastic streams. Plant origin does not make it disappear in nature.

The European Commission’s 2022 policy framework on bioplastics confirms this: bio-based plastics “are not necessarily biodegradable or compostable,” and their environmental benefits depend on the full life cycle, not just origin (European Commission, 2022).

Biodegradable: the label that needs a timeframe

Biodegradable means microorganisms — bacteria, fungi, algae — can break the material down into water, carbon dioxide, and biomass. Nearly every material biodegrades eventually. The critical questions are: how long does it take, and under what conditions?

An unqualified “biodegradable” label is genuinely problematic. EU consumer protection and anti-greenwashing guidance considers it misleading, because it gives no information about timeframe or conditions (European Commission, 2022). Some biodegradable plastics need industrial composting temperatures, specific humidity, and microbial conditions to degrade within a useful timeframe. Leave the same material in the open environment, a landfill, or a home compost bin, and it may barely degrade at all.

This is not theoretical. Research confirms that biodegradable bioplastics outside their required conditions “may or may not biodegrade” and can persist like conventional plastic (European Environment Agency, 2021).

Compostable: biodegradable with a certificate

Compostable means the material passed third-party testing. It breaks down within a defined timeframe under controlled conditions — producing water, carbon dioxide, and biomass with no toxic residue and no negative effect on compost quality.

In Europe, the reference standard for packaging is EN 13432. It requires at least 90% biodegradation within six months at industrial composting temperatures of around 58°C. Material fragments must be smaller than 2mm after 12 weeks (European Committee for Standardization, 2000). Certification bodies including TÜV Austria (OK Compost label) and DIN CERTCO in Germany verify compliance independently.

Industrial vs home compostable: not the same thing

A separate category — home compostable — certifies materials to break down at lower ambient temperatures (20–30°C) over 12 months. These must meet stricter conditions, since home composting is far less controlled than industrial facilities.

This distinction matters enormously for disposal. That is exactly what the next question covers.

Question 2: Can I put compostable packaging in my home compost bin?

Almost certainly not — unless the packaging carries a specific home compostable certification (look for the OK Compost HOME label or a national equivalent).

Why industrial composting is not the same as garden composting

The confusion is understandable. “Compostable” sounds like something you can compost. But most certified compostable packaging meets the industrial standard EN 13432. It needs sustained temperatures of around 58°C — conditions only industrial facilities can generate and maintain. A garden compost bin runs at ambient European temperature: typically 20–30°C. That is not enough to break down industrially compostable bioplastics within any useful timeframe.

If industrially compostable packaging ends up in your home compost bin, it sits there intact. It behaves like conventional plastic for months or longer.

Where to put it instead

The correct route for industrially compostable packaging is the organic waste or food waste bin, which feeds industrial composting infrastructure. Many EU municipalities already offer this collection. Availability varies across Member States, however. Even where facilities exist, many do not accept bioplastic packaging alongside food waste. Contamination concerns and the difficulty of visually distinguishing compostable from non-compostable packaging are both factors.

This infrastructure gap is not a failure of the materials themselves. It is a systemic challenge — and closing it is exactly what MoeBIOS works toward, alongside developing dedicated recycling routes for bioplastics that organic recycling cannot handle.

Question 3: Is bio-based plastic the same as biodegradable plastic?

No. This is the most persistent misconception in the bioplastics debate, and it has real consequences for consumers and brand owners alike.

The confusion comes from a natural association: if something came from a plant, surely it disappears like a plant? Polymer chemistry does not work that way. Once plant-based raw materials become plastic polymers, the structure depends on the chemistry of the polymer — not the origin of the feedstock.

Four materials that prove the point

If you want to go deeper on the chemistry of each material type, our dedicated guide covers PLA, PHA, PBS and PEF in detail. For now, here is how they differ at end of life:

• PLA (polylactic acid) is bio-based and can be industrially compostable — but it needs controlled industrial conditions to biodegrade. It should not go in plastic recycling.
• Bio-based PET is bio-based but non-biodegradable. It belongs in standard PET plastic recycling, exactly like fossil-based PET.
• PHA (polyhydroxyalkanoates) can be both bio-based and biodegradable across a wider range of environments, including marine conditions in some certified grades. Correct sorting and collection still matters.
• PBAT is biodegradable but largely fossil-based. Its origin is petroleum, yet it breaks down in industrial composting.

European Bioplastics e.V. summarises it clearly: a plastic is a bioplastic if it is either bio-based or biodegradable, or both. These are independent properties (European Bioplastics e.V., 2022).

Why this matters for brand owners

For packaging professionals, this distinction carries direct regulatory weight. Under the EU Green Claims Directive (proposed 2023) and anti-greenwashing provisions active across Member States, claiming that a bio-based material is therefore biodegradable — or the reverse — constitutes a misleading environmental claim. Legal risk follows.

Question 4: How should I dispose of bioplastic packaging — recycle or compost?

It depends entirely on the type of bioplastic. No single rule covers all bioplastic packaging. These materials have very different properties and very different end-of-life requirements.

Here is a practical guide:

The golden rule: check the certification mark

Read the label and look for a certification mark. The seedling logo (EN 13432) or OK Compost Industrial logo means certified for industrial composting. The OK Compost HOME logo means it can go in home compost. If the label only says “biodegradable” with no certification mark, send it to general waste — not recycling, not compost. Without certification, there is no guarantee of how or where it breaks down.

When uncertain, general waste is better than contaminating a recycling or composting stream. Contamination renders entire sorted batches unusable. It is one of the biggest practical obstacles to scaling bioplastic circular economy systems.

Question 5: Are bioplastic labels greenwashing?

Not inherently — but a label is only as honest as the system behind it.

Greenwashing with bioplastic claims happens in several specific ways:

Vague biodegradability claims. Saying “biodegradable” without specifying conditions or timeframe is legally questionable under the EU Green Claims Directive and national consumer protection laws across Member States. The European Commission’s 2022 framework states labels must not use “ambiguous statements” — only “specific and scientifically justifiable claims” (European Commission, 2022).

Implying home biodegradability. A product certified only for industrial composting must not suggest it breaks down in nature, landfill, or a home compost bin. If packaging design or copy implies the material is “natural” or will simply “disappear,” that is greenwashing — even when the technical certification is accurate. For a look at what genuinely sustainable packaging solutions look like in practice, see our overview of 7 smart bioplastic packaging solutions.

Overemphasising origin, ignoring end of life. Highlighting that a product is “made from plants” while giving no disposal guidance, or selling it in markets without industrial composting infrastructure, is misleading by omission.

Missing third-party certification. Legitimate compostable and bio-based claims need independent verification to recognised standards: EN 13432 for industrial compostability, ISO 16620 for biobased content. Without these, consumer scepticism is justified.

When labels are legitimate

At the same time, dismissing all bioplastic claims as greenwashing is wrong. Certified materials, correctly disposed of in appropriate infrastructure, deliver genuine environmental benefits — less fossil resource use, carbon stored in bio-based polymers, and organic material diverted from landfill.

The problem is systemic, not material. Bioplastics cannot deliver on their potential if the infrastructure to sort, collect, and process them does not exist at scale. This is the gap MoeBIOS is closing: building three integrated recycling value chains — for bioplastic packaging, textiles, and agriculture — so that labelled materials actually go somewhere useful at end of life.

Why end-of-life infrastructure is the real issue

Labels are necessary. They are not sufficient. Well-informed consumers who dispose correctly can still see their bioplastic packaging reach landfill if downstream infrastructure is missing.

Europe’s infrastructure gap today

Industrial composting capacity in the EU is growing — but unevenly. Dedicated bioplastic sorting infrastructure barely exists in most markets. Recycling routes for complex bioplastics like PLA and PHA are still at pilot and demonstration scale. These materials contaminate standard plastic recycling streams, so they cannot simply join existing flows.

What MoeBIOS is building

MoeBIOS focuses on the missing recycling value chains for bioplastics across packaging, agriculture, and textiles. The project develops advanced sorting, conditioning, and valorisation processes — all integrated into existing industrial infrastructure. The aim is to give bioplastics a productive end of life: recycled back into high-quality materials, not lost to landfill or incineration. You can read more about how this applies specifically to bioplastics in agriculture and why that sector needs circular solutions now.

A bioplastic label should not just describe what a material is. It should connect that material to a system that delivers on the promise. Labels only mean something when the infrastructure makes them real.

Key takeaways

• Bio-based = made from renewable biological resources. Says nothing about end of life.
• Biodegradable = can be broken down by microorganisms. Meaningless without specifying conditions and timeframe.
• Compostable = certified to biodegrade within defined timeframe and conditions. Industrial composting and home composting are different — check which certification applies.
• Bio-based ≠ biodegradable. They are independent characteristics.
• Most compostable packaging cannot go in your home compost. Look for the OK Compost HOME label specifically.
• Greenwashing risk is real — but so are genuinely certified materials with legitimate environmental benefits.
• The real bottleneck is infrastructure. Even correct materials need correct systems to close the loop.