When a business introduces recycling bins, the usual approach is to explain what goes where, add signage and make sure staff understand the new system.
But a few weeks later, food, soft plastics, coffee cups, plastic bags and general rubbish may still be turning up in the recycling.
It is easy to assume people are simply not paying attention and respond with more signage, another email or additional training.
Education matters, but if the same waste contamination keeps happening, it may be time to look beyond the people using the bins, and asking a different question:
Is the waste system making the right behaviour easy?
Recurring contamination may point to a knowledge gap, but it can also reveal problems with bin placement, confusing waste streams, inconsistent labelling, cleaner processes or the way waste moves through the site.
Start by looking inside the bins
Commercial recycling contamination occurs when material enters a waste stream where it does not belong. Depending on the service, this might include food, liquids, soft plastics, bagged waste, general rubbish or hazardous items entering a recycling stream.
Those materials can reduce recovery, increase handling requirements, create safety issues and affect downstream processing.
But they can also provide clues.
If coffee cups repeatedly appear in recycling, where are they entering the system? Is there an appropriate bin beside the kitchen or coffee area? Are the instructions clear at the exact point where people dispose of them?
If food is regularly contaminating cardboard recycling, is the cardboard bin positioned beside a food preparation area? If waste contamination is concentrated on one floor, shift or tenancy, what is different about the waste setup there?
Before deciding how to fix contamination, identify what is going wrong and where.
Look at the system people are being asked to use
A sign cannot compensate for a system that is inconvenient or confusing.
People generally dispose of waste quickly. If general waste is closer, easier to see or more convenient to use than recycling, it will often become the default.
The same applies when different areas of a site use different colours, terminology or bin arrangements. A yellow bin may mean recycling in one area, while another uses a blue container labelled “co-mingled recycling”. Even if both accept the same materials, the inconsistency creates another decision for the user.
The physical setup should make the correct option as intuitive as possible.
That means looking at where waste is actually generated and matching the services to those locations. A kitchen, office, warehouse and loading dock may all need different waste streams because they generate different materials.
Not every bin needs to be everywhere.
Follow the waste beyond the person using the bin
Waste contamination does not always occur at the point of disposal.
Staff may separate material correctly, only for cleaners to combine streams later. Contractors may use the wrong external bin because nobody has explained the site setup. Temporary workers and visitors may have no knowledge of the recycling system at all.
For facilities managers, this means looking at the full internal waste journey.
Check whether cleaners know which internal bins correspond with which external services, whether liners are appropriate for each stream and what they should do when they find contamination.
Contractors should also understand which services they can use, particularly when they generate waste that is different from normal day-to-day site materials.
A commercial recycling system has to work for everyone who interacts with it, not just permanent employees.
Then make targeted changes
Once the likely source of contamination is clearer, the solution becomes more specific.
That might mean:
- repositioning a recycling bin closer to where the material is generated;
- placing relevant waste streams together;
- simplifying unnecessary or confusing bin options;
- standardising colours, terminology and signage across the site;
- showing examples of the actual materials generated onsite;
- changing cleaner or contractor processes; or
- providing targeted education where there is a genuine knowledge gap.
Education still has an important role. But it is much more effective when it addresses a specific problem rather than being used as the default response to every contaminated bin.
Check whether the change worked
Contamination management should not stop once a new sign or bin has been installed.
Inspect the waste again; has the problem reduced? Are the same contaminants still appearing? Has contamination moved somewhere else in the system?
If the result improves, the intervention is working. If not, there is more to investigate.
This turns waste contamination management into an ongoing process of inspect, diagnose, adjust and review, rather than repeatedly asking people to pay more attention.
Still dealing with recurring contamination?
If people repeatedly put the wrong material in the wrong bin, do not only look at the people. Look at the system they are being asked to use.
Wanless can review your waste streams, bin placement, waste stations, contamination patterns and cleaner or contractor processes to help identify where the system may be breaking down and practical ways to make correct disposal easier.
Not sure where contamination is entering your recycling system?
Download our Workplace Recycling Contamination Checklist to review bin placement, signage, consistency, cleaner processes, contractor behaviour, common contaminants and whether your current recycling setup is working as intended.
Do you have workplace commercial waste contamination?
Wanless can review your current bin mix, collection frequency, waste streams and site setup to identify possible inefficiencies, contamination risks and opportunities to improve recovery.
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