TECH

Why does so much laboratory plastic end up in the trash, even though it is recyclable?

Laboratories require disposable plastic for a simple reason: to prevent contamination. Bottles, Petri dishes, and pipette tips are used daily; once they come into contact with potentially contaminated samples, they can no longer follow the standard recycling path. For years, this meant sterilization, transport, and often, final disposal. Now, a new technology aims to change this dynamic right where the waste is generated.

The paradox arises once the experiment ends. Many laboratory containers are made from plastics that could otherwise be recycled. The problem is that, after coming into contact with microorganisms or certain substances, they are classified as contaminated waste.

This completely changes their fate.

Instead of entering a conventional recycling stream, these materials must undergo specific decontamination processes. Often, they are sterilized in autoclaves—equipment that uses high-pressure steam. Even after this treatment, some of the waste may still end up in landfills or be incinerated.

The result is a counterintuitive situation: an object made of recyclable material can turn into trash simply because it was used in a laboratory.

This is where a new approach comes in. Instead of transporting waste to an off-site facility, a machine allows various treatment stages to be carried out within the laboratory itself.

The equipment decontaminates the materials and then shreds them. The result is fragments that can be sent for sorting and subsequent recovery.

The goal isn't to instantly turn a used bottle into a new one. The objective is more fundamental—and perhaps more important: to remove the obstacle preventing the waste from re-entering the recycling stream.

In Scotland, the experiment has already processed thousands of bottles...The technology is called GENERATIONS and was developed by Envetec Sustainable Technologies. Scottish Water, the public utility responsible for water supply in Scotland, decided to put the system to the test.

Since January, the system has processed approximately 72,000 bottles used for sample collection. This initiative made the company the first water utility in the world to use such a system, according to an announcement released by Scottish Water itself.

But the bottles are just the beginning. The system is now also being used for materials that are harder to send for conventional recycling, such as Petri dishes and pipette tips.

The importance of this shift becomes clearer when looking at the scale of the problem. Scottish Water’s laboratories conduct around 3 million analyses annually, examining samples from various locations across Scotland to monitor water quality, identify microorganisms, and track environmental parameters.

This volume generates a significant amount of plastic waste.

The Scottish initiative therefore seeks to transform an unavoidable stage of scientific activity. Instead of automatically treating certain products as trash after use, the idea is to determine whether they can be decontaminated and prepared for a recovery process.

A solution to a much larger problem... The challenge is far from unique to Scottish Water. The University of Bath estimates that scientific research accounts for approximately 2% of global plastic waste and calculates that a life sciences laboratory professional can generate about 116 kilograms of waste per year.

The reason for so much disposable plastic is understandable. In scientific settings, reusing a pipette tip or other material that has come into contact with a sample can lead to contamination, alter results, and compromise critical analyses.

The technology, therefore, does not aim simply to eliminate disposable products. Instead, it seeks to address what happens after they have served their purpose.

Another interesting feature of the system is traceability. The equipment records data such as the volume processed, the types of polymers involved, the origin of the waste, and the material's ultimate destination. It also allows for estimates of the emissions that could have been avoided. This can help answer a fundamental question: did the plastic really return to the recovery chain, or did it simply change location?

If the experiment demonstrates consistent results on a larger scale, the technology could spark interest among universities, hospitals, and research centers. After all, the issue lies not only in the amount of plastic used in science but also in the difficulty of recovering materials that—despite being technically recyclable—pose a biohazard risk.

The machine does not eliminate laboratories' reliance on disposable plastic. However, it can address one of the most challenging aspects of the problem: preventing contamination from turning potentially recyclable material into permanent waste.

mundophone