An infectious medical waste is not condemned to end up burned or buried. Properly treated, it can become a secondary raw material. That is the whole point of medical waste valorisation: instead of paying to destroy a material, it is recovered and given a second life. At Ecosteryl, this transformation relies on a complete chain, from decontamination to sorting, capable of recovering up to 80% of medical waste.

Table of contents:

• Why medical waste still ends up burned or buried
• The step that makes the material reusable
• Three fractions, three destinies: R-steryl sorting
• From material to product: what healthcare plastic can become
• An environmental and economic benefit
• Frequently asked questions

Why medical waste still ends up burned or buried

For a long time, the final disposal of infectious medical waste after treatment came down to two options: incineration or landfill. Two solutions that destroy the material instead of recovering it. Healthcare plastic, present in large quantities in care settings, thus goes up in smoke or into landfill. This is a double waste. An environmental waste, because these petrochemically derived plastics release pollutants when burned. And an economic waste, because we pay to eliminate a resource that could have been valorised.

To understand the nature of this waste and the share that can actually be recycled, we detail this in our article on types of medical waste.

The step that makes the material reusable

To valorise infectious waste, it must first be rendered harmless. That is the role of Ecosteryl machines, a 100% electric alternative to incineration. The waste is shredded by a 4-axis industrial shredder into fragments of less than 35 mm, then brought to approximately 100 °C via microwaves and held at that temperature for nearly an hour in a holding tank. The process ensures disinfection at 6 log10, meaning a 99.9999% reduction in micro-organisms. The treatment is carried out without combustion and without water: there are therefore no direct CO2 emissions linked to on-site combustion. Output result: waste reduced by approximately 80% in volume, dry, unrecognisable and above all with a particle size perfectly suited for sorting. It is precisely this shredded material quality that makes the next step possible.

We explain this breakthrough in more detail in our article on innovation towards the circular economy, and the full process on our decontamination process page.

Three fractions, three destinies: R-steryl sorting

Once the waste has been decontaminated and dried, it enters the second step: sorting. The R-steryl is a one-of-a-kind sorting centre positioned downstream of Ecosteryl machines. Using an infrared optical sorter and an aeraulic system, it separates the shredded material into three distinct fractions, with a processing capacity of up to 2 tonnes per hour.

Fraction 1: plastics

This includes PET, PP, PVC, PS, LDPE, HDPE, etc. Where does this fraction go? Into recycling through valorisation processes, including plastics manufacturing to be transformed into pellets, for example.

Fraction 2: the light fraction

This includes light materials. Where does this fraction go? Into energy valorisation processes as substitute fuels (RDF or SRF).

Fraction 3: the remainder

This is the non-valorisable residual fraction. Where does this fraction go? Either back into the sorting centre with different parameters to select materials present in this fraction, or to landfill.

It is the first fraction that changes everything. The sorted plastics, separated by family, become reusable by the plastics industry, exactly like a raw material. In total, the R-steryl recovers and valorises up to 80% of the waste.

From material to product: what healthcare plastic can become

Once transformed into pellets or flakes by a recycler, these plastics can be used to manufacture new objects. This is where the loop truly closes: the material from healthcare settings re-enters the economy in the form of useful products. Specialist players are already exploring these outlets. Various start-ups in collaboration with Ecosteryl have, for example, the project of transforming healthcare waste into durable construction materials such as panels or thermal insulation, and tests are promising. This type of initiative illustrates the potential of valorised material: the plastic from a care unit could, tomorrow, end up in a wall, a piece of furniture or an everyday object. Ecosteryl follows these innovations closely, as they naturally extend the sorting logic of the R-steryl.

An environmental and economic benefit

Valorising rather than destroying offers a double advantage. On the environmental side, every kilo of plastic recovered is a kilo that is neither burned nor buried, and that replaces virgin material. On the economic side, the equation is reversed: instead of paying to dispose of waste, the facility or operator transforms that cost into a revenue stream by reselling a raw material. This circular approach reflects Ecosteryl’s commitment, as a B Corp-certified company, to responsible practices. R-steryl is recommended for any customer already operating an Ecosteryl machine who wishes to move from an elimination logic to a valorisation logic.

For the most frequently asked questions about our solutions, also consult the 10 questions we are asked most often.

Frequently asked questions

Which plastics from medical waste can be recycled?

After disinfection and sorting, the main families of valorisable plastics are PE, PP, PVC, PS, LDPE, HDPE and PC. They are separated by type.

Is medical waste safe once treated?

Yes. Before any sorting, the waste passes through an Ecosteryl machine which decontaminates it at 6 log10, meaning a 99.9999% reduction in micro-organisms. It comes out dry, unrecognisable and harmless, which allows it to be handled and valorised safely.

What does the recycled material actually become?

The sorted plastic fraction is reusable by industry. Often transformed into pellets as second-generation plastic, it can be used to manufacture new objects, including construction materials such as panels or insulation.

In summary

Medical waste is no longer an end point. Thanks to Ecosteryl decontamination followed by R-steryl sorting, it once again becomes a secondary raw material.

The plastics recovered after disinfection are sorted by R-steryl. These plastics are then directed to appropriate valorisation channels. After preparation by a specialist recycler, they can be transformed into secondary raw material and reintroduced into the plastics industry.

Innovations in medical waste treatment: why circularity is a game changer

The healthcare sector generates growing volumes of medical waste, driven by rising patient numbers and the widespread use of single-use materials. Some of this waste is infectious and must be disinfected before any disposal. For decades, the default response was incineration, sometimes uncontrolled, at the bottom of a garden. Today, the innovation debate often focuses on the digital side: sensors, connected containers, dashboards. These tools are useful, but they measure the waste more than they treat it. The real environmental breakthrough lies elsewhere: decontaminating without burning, then transforming infectious waste into a dry, recyclable material.

A volume of waste that weighs on the climate

Statistics indicate that around 85% of medical waste is considered non-hazardous; the remaining 15% is infectious, toxic or at risk, and requires specific treatment. The healthcare sector is also estimated to account for nearly 4.4% of global greenhouse gas emissions according to the organization Health Care Without Harm, which would make it one of the main contributors worldwide. Gloves, syringes, tubing and plastic packaging, derived from petrochemicals, release CO₂ and other pollutants when they are incinerated or landfilled. Reducing this footprint therefore means rethinking not only collection, but above all the method of treatment.

The first wave of innovation: digital, sensors and traceability

A large part of recent innovations focuses on data. Connected containers measure fill levels in real time and integrate with hospital IT systems to trigger alerts and optimize pickups. AI-assisted sorting systems aim to better separate hazardous and non-hazardous streams. These advances improve traceability and safety, and cut down on unnecessary trips. They represent real progress. But they share a limitation: they help track and organize the waste, without neutralizing it or giving it a second life. For that, it is the treatment process itself that must evolve.

The real breakthrough: decontaminating without combustion or water

This is where microwave treatment comes in, a 100% electric alternative to incineration. Ecosteryl’s principle? The waste is first shredded by a 4-shaft industrial shredder to reduce particles to less than 35 mm. It is then heated to around 100°C within a few minutes in a microwave tunnel. The waste is then held for close to an hour at 100°C in a vessel. This process ensures 6log10 disinfection, meaning a 99.9999% reduction of micro-organisms.

The environmental benefit is twofold. On the one hand, treatment takes place without combustion and without water, which limits emissions and regulatory constraints compared with an incinerator or an autoclave. On the other hand, the waste comes out reduced by around 80% in volume, dry, unrecognizable and recyclable. Microwave treatment is also more energy-efficient, requires little manual intervention and remains fast.

From decontamination to recycling: the circular economy in action

Decontaminating is no longer enough. The next question is: what becomes of the material once it has been treated? This is precisely where Ecosteryl takes innovation a step further with R-steryl, a sorting and recycling center for decontaminated waste. Once dry and harmless, the waste is no longer an end of the chain but a resource: plastics from healthcare can be recovered and reintroduced into a recycling stream. This shifts the logic from disposal to circular economy.

This approach reflects a fundamental trend. More and more hospitals are adopting circular strategies, recognizing that a large part of their waste is in fact made up of recoverable non-clinical materials. Turning infectious waste into recyclable material is not a token argument: it is the logical outcome of a treatment that leaves the waste dry and with good particle size.

What about digital at Ecosteryl?

Digital is not absent from this approach: it is its complement. The machines integrate sensors and allow treatment data to be monitored, useful for management, maintenance and compliance. The difference in approach can be summed up in one sentence: data comes to support a process that genuinely transforms waste, rather than being the innovation on its own.

Ecosteryl naturally follows this trend, having for long equipped its machines with the best sensors to make them as automated as possible. The case of Rennes University Hospital (CHU de Rennes), which no longer even touches the infectious waste, is yet another example of innovation.

Limiting the handling of infectious waste

Another area of progress concerns the safety of teams. The more infectious waste is handled, the greater the risk of exposure. The most advanced approaches therefore aim to minimize human handling, from collection to treatment, and to automate the most sensitive stages of the chain.

The partnership between Envac and Ecosteryl made it possible to provide Rennes University Hospital with an automated infectious waste disinfection system. The waste is vacuumed away in 20 seconds and sent to a specially adapted Ecosteryl unit. This technological feat places Rennes University Hospital at the forefront of “zero contact” and the ecological treatment of infectious healthcare waste (DASRI).

Comparison of the main treatment methods

Each method addresses different constraints. The table below summarizes their main principles.

Frequently asked questions (FAQ)

What alternative is there to incinerating medical waste?

Microwave treatment is a 100% electric alternative. The waste is shredded and then heated to around 100°C, without combustion or water, which reduces emissions compared with an incinerator.

Can medical waste be recycled?

Yes, it can be recycled once decontaminated and dry. With a center like R-steryl, plastics from healthcare can be sorted and reintroduced into a recycling stream, following a circular economy approach.

How does microwave treatment work?

The waste is shredded into fragments smaller than 35 mm, preheated by microwaves to 100°C, then held at around 100°C for close to an hour. The process ensures 6log10 disinfection, meaning a 99.9999% reduction of micro-organisms.

Is microwave treatment more environmentally friendly than incineration?

It works without combustion or water and in a 100% electric way, which reduces emissions and regulatory constraints. The waste also comes out reduced by around 80% in volume and is recyclable.

In summary

Innovation in medical waste treatment is not just about connecting containers or multiplying sensors. These tools have their uses, but they accompany waste without transforming it. The real turning point is environmental and industrial: decontaminating without burning, then recovering the material instead of disposing of it. It is this combination, 100% electric treatment and circular economy, that shapes the future of the sector.

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