E-waste: what to do with circuit boards and obsolete equipment

Key takeaway: Circuit boards and obsolete equipment contain valuable metals, but also components that need separate handling and, often, data or customer designs that must be protected. Before handing them over, inventory them, remove batteries and storage media, sort by type, and choose a receiver that documents the final destination.

Electronics manufacturing is one of the sectors behind the nearshoring wave in Mexico, and with it comes a steady flow of e-waste: rejected boards, assembly leftovers and out-of-spec components, plus the IT and industrial equipment every site eventually retires. All of it tends to pile up in a storeroom "until someone decides."

Well-managed e-waste recycling clears that backlog with three goals: compliance with Mexican rules and corporate policy, protection of data and intellectual property, and recovery of material value.

What counts as e-waste in a company

• Printed circuit boards, populated or bare.
• Assembly line scrap: rejected boards, panels, test pieces.
• Computers, servers, monitors and peripherals.
• Telecom and networking equipment.
• Industrial equipment: PLCs, drives, power supplies, control panels.
• Insulated cable, harnesses and connectors.
• Batteries and devices with built-in batteries.

Each follows a different route, so don't treat them as a single lot.

Why it has value (and why not all of it is worth the same)

Electronic equipment combines metals such as copper, aluminum and steel with engineering plastics and, in boards and connectors, small amounts of precious metals. A lot's value depends on how much of each material it contains and how easily it can be recovered.

That's why a mixed lot is usually worth less than the sum of its sorted parts.

Scrap from your own production line deserves separate treatment. Rejected boards of the same model are homogeneous and generated steadily, which makes them easier to evaluate and to place with a stable outlet. Keep them sorted by model or product family, away from office equipment and boards from other sources.

Classification and rules in Mexico

The LGPGIR lists technological waste among the categories of special handling waste, which state governments regulate. But electronic equipment can contain components considered hazardous or requiring specific handling, such as:

• Lithium, lead-acid and other batteries.
• Older lamps and displays that may contain mercury or other substances.
• Components that, because of their composition, should be evaluated under NOM-052-SEMARNAT-2005.

Remove these components before shipment and send them to a company authorized to handle them, or confirm the receiver holds that authorization. For background on the category, see our guide to special handling waste in Mexico.

Two points specific to foreign-owned operations. First, if your corporate policy or your customers require e-waste processors with particular industry certifications, confirm exactly what is demanded and what each provider can document. Second, if you operate under IMMEX, boards and components made from temporarily imported inputs may carry customs obligations before they can be sold or destroyed in Mexico; coordinate with your customs broker. Requirements can vary by state, so validate your procedure with the authority or a local environmental consultant.

Before handover: protect data and designs

The most underestimated e-waste risk isn't environmental; it's information.

Data-bearing equipment

Hard drives, solid-state drives, memory and network equipment can hold confidential data. Remove them and apply the method your corporate IT asset disposition policy specifies: secure erasure or physical destruction. Record serial number, method, date and responsible person.

Boards with your own or customer designs

If you're a contract manufacturer, scrap boards may carry your customers' designs, and their contracts may specify how scrap must be destroyed. Prevent those boards from re-entering the market as "good" parts: deface them on site using a method agreed with your recycler, or require it during processing, with photo evidence. Ask for a recycling certificate showing weight, date and destination.

Fixed assets

If the equipment is booked as a fixed asset, coordinate the write-off with finance and keep the shipping and recycling documents; your local accountants will likely need them as support.

Preparing material so it's worth more

1. Separate boards from housings and cables when volume justifies it.
2. Group by type: computer boards, power supply boards, industrial equipment boards and your own production scrap.
3. Remove batteries and store them separately, with terminals protected, in a non-conductive container.
4. Don't shred or crush whole lots yourself: it complicates sorting and can release contaminated dust.
5. Keep material dry, in closed boxes or containers.
6. Label every lot with type, source and date.

What to ask whoever receives your material

Before the first lot ships, get clear answers from the receiver:

• What authorizations does it hold to receive technological waste in your state?
• What does it do with batteries and potentially hazardous components, and who receives them?
• How does it deface boards and data-bearing media, and what evidence does it provide?
• Does it accept mixed lots, or does material need to arrive sorted by type?
• What documents will you receive for each shipment: weight ticket, photos, certificate?

Add the answers to your vendor file; corporate and customer auditors will likely ask for them. If any answer is vague, better to know before your material leaves the plant.

A six-step retirement process

Before recycling, consider whether any equipment still works and can be redeployed internally or donated, always after data has been removed. For everything else, and to keep equipment and scrap from piling up again, formalize the process:

1. Inventory the equipment or scrap, with serial numbers where applicable.
2. Get sign-off from IT, finance and EHS.
3. Remove storage media and batteries.
4. Sort and pack by type.
5. Ship with weighing and documentation.
6. File tickets, certificates and destruction evidence.

Set a frequency, quarterly for example, so the "pending" storeroom doesn't grow back.

How Zikloa can help

Circuit boards are part of the raw materials catalog Zikloa trades, and we recycle the metals and plastics that come out of obsolete equipment, including copper, aluminum and engineering plastics. We can help you define how to sort your lots so they keep their value and document every shipment with certified weighing.

Tell us what type of electronic material you're accumulating and in what volume: contact us and we'll tell you what we can take.