How to recycle e-waste?

E-waste or waste from electrical and electronic equipment (WEEE) covers a wide range of products with a power or battery supply: from computers and mobile phones to household appliances or medical devices. It is one of the fastest-growing waste streams and thus a critical global concern. Proper handling and recycling are key: not only because it contains hazardous materials and can have a negative impact on the environment and public health, but e-waste is also a source of scarce and valuable resources.

Increasing volumes of e-waste are directly linked to economic developments. In 2019, almost 54 Mt of WEEE were generated globally, and this number is growing every year. In terms of e-waste generated per capita, the European Union ranks first with 16.2 kg, while Asia generated the highest quantity of e-waste total at 24.9 Mt.

With e-waste, proper management and recycling are crucial. It contains toxic substances that are released into the environment during informal recycling, which results in a direct negative impact on people’s health, pollution, and even contributes to global warming. That is why more and more countries are adopting policies on e-waste. In 2019, 78 countries had policies, regulations, or laws in place that regulated e-waste, which covered 71 % of the world’s population. However, the global collection rate averages only 17 %, with Europe collecting around 55 % WEEE. Not only the number, but the standards of treatments vary greatly around the world.

E-waste collectors grouped themselves in the WEEE Forum in 2002 – the only international group of producer responsibility organizations (PROs) dedicated to the take-back and treatment of electrical and electronic waste. WEEE Forum is comprised of forty-six not-for-profit members which are mandated by 46,000 producers of electrical and electronic products. In 2021, the PROs from WEEE Forum collected 3.1 million tonnes of e-waste, equivalent to 310 Eiffel Towers. Over the past two decades, they have collectively managed in excess of thirty-five million tonnes.

So how should we correctly dispose of e-waste and what is the recycling process?

1. Collection

First and foremost, e-waste does not belong to general waste. When disposing of e-waste, you need to bring it to a designated collection place, usually a special recycling bin, a certified collection site, or major electronics retailers. Always check for rules that are valid in your country. Find out more tips for proper e-waste recycling when you move.

Collecting electronic items via recycling bins, take-back programs, collection locations, or on-demand collection services is the first step in the e-waste recycling process. After that, the mixed e-waste is sent to specialized electronics recyclers.

At this step, best practice demands that e-waste is divided by kind, so many collection sites will still have multiple bins and boxes for different things. This is especially critical for e-waste which requires extra handling such as batteries and can cause significant damage if mixed with other rubbish.

Sensoneo is currently monitoring more than 1300 e-waste containers by company ASEKOL. Thanks to ultrasonic bin sensors, data about the fill-level capacity of the bins can be monitored remotely. Sensoneo’s Citizen App enables citizens to see the nearest available empty bin on the map and discover the shortest route to get there or report any issues by providing feedback about the bin.

2. Sorting, dismantling, and shredding

The first step in processing e-waste involves manual sorting to extract specific items, such as batteries and bulbs, for their own processing. During this stage, certain items may be dismantled by hand to recover valuable materials or components for reuse.

After manual sorting, e-waste is shredded into small pieces to facilitate the precise sorting of materials. This is a critical stage of the process since electronics typically consist of various materials that can be separated mechanically when broken down into centimeter-sized pieces.

3. Mechanical separation

The mechanical separation of materials involves multiple sequential processes, with magnetic separation and water separation being the primary steps.

Magnetic separation

The e-waste is shredded and subjected to magnetic separation to extract ferrous metals like iron and steel, while non-ferrous metals are separated using eddy currents. These metals are then sent to specialized recycling facilities for smelting. Other materials, such as circuit boards and metal-embedded plastic, are separated during this stage.

Separation by water

After magnetic separation, the remaining solid waste primarily consists of plastic and glass. To further purify the waste and separate different types of plastic, water is used in a subsequent separation step. Obvious contaminants are also hand-sorted during this process.

4. Recovery

Once separated, the materials are readied for reuse and sale. Certain materials, like plastic or steel, are directed to other recycling streams. However, others can be processed onsite and sold directly, along with usable components extracted during earlier stages of the recycling process.

What materials can be extracted from e-waste?

Recycling e-waste is sometimes called urban mining, as it contains some valuable and scarce materials. Recovering certain materials is not only sustainable but also very economical: in the case of gold, copper, and other metals it can be 13 times cheaper than extracting metals from mines.

Materials that can be extracted and re-used include:

• precious metals such as gold, silver, copper, platinum, rhodium, or ruthenium
• critical raw materials such as cobalt, palladium, indium, or antimony
• noncritical metals such as aluminum and iron
• plastics
• glass
• and other materials.

Not all electronic and electrical waste parts can be recycled and reused. For example, the glass screens of Cathode Ray Tubes (CRT) TVs and monitors are highly contaminated by lead. That is why at this moment a large part of this glass is stored indefinitely.

As the whole waste industry, e-waste recycling is also utilizing technologies. That includes for example the use of smart waste solutions for the collection and transport of e-waste like Sensoneo’s take-back system, using robots for dismantling electronics instead of shredding, or utilizing artificial intelligence in identifying e-waste.

References:

conserve-energy-future.com, rts.com, iberdrola.com, roadrunnerwm.com, ewastemonitor.info, europa.eu, weee-forum.org