The Mine We Have Already Built

The old phone still turns on. Its owner keeps it in a drawer because a spare might be useful. A charger lies beside it, though nobody is quite sure which device the charger fits. When the drawer becomes difficult to close, the family sorts it. Some things will be used again. Others need somewhere to go.

For the household, this is a small job postponed until Saturday. For a business hoping to recover the materials, it is a supply problem. The phone exists. It contains things someone may want. But it has no collection date, and the owner has made no promise to deliver it.

Calling old products a mine makes their value easier to see. It can also hide the work between seeing that value and using it. A deposit has boundaries to map. Material held in products is spread among people making choices. It may be serving them well, waiting for repair, or lying forgotten. A firm cannot treat all of it as feed arriving at its gate next week.

We should want to recover more of this material. We should also want products to keep working while people still need them. Those aims fit together over a lifetime, though they may pull in different directions in a yearly report. A repaired phone returns to use today. Its materials return for recycling later.

The better ambition is to get more service from the material already brought into the world, then recover what can serve again. That calls for a system whose parts work together. An excellent recovery plant has little to recover from a drawer it cannot reach.

Count the material at the right door

Recycling has several doors, and a percentage at one does not describe the whole journey.

Start with two pictures. A stock is the amount held at a particular time: the material in all the products still serving their owners. A flow is the amount moving through a step over a period, such as the material leaving use this year. A growing stock can be valuable while offering little immediate recycling feed. To plan a plant, we need an estimate of the flow that will reach it, rather than the whole stock that exists.

Manufacturing scrap comes from making products; end-of-life scrap comes from products after use. The collection rate measures the share of discarded material gathered for recycling. Process yield measures what a recovery process gets back from its input. The end-of-life recycling rate follows discarded material through the chain into recovered material. Recycled content instead asks what share of a new material or product comes from recycling. Each needs a stated boundary and denominator.¹

The denominator is the amount being divided into. Keeping track of it is less difficult than the word sounds. Suppose an imagined town retires products containing one hundred units of a material. Eighty units reach the recovery plant. The plant gets back nine-tenths of those eighty units, or seventy-two.

The collection rate is 80 per cent. The plant’s recovery yield is 90 per cent. Together, they return 72 per cent of the material in the retired products. Reporting only the plant’s ninety would leave the twenty units that never arrived outside the story.

Where should the town spend its next pound or dollar? Perhaps on better recovery equipment. Perhaps on a place where people can return things without losing half a day’s work. The three rates help it find the weak step. A single impressive percentage may conceal it.

There is still another question. How much of next year’s manufacturing can those seventy-two units supply? We cannot answer until we know how much material next year’s factories need. Recovering a high share of yesterday’s smaller market may supply only a modest share of tomorrow’s larger one.

To see the time lag clearly, consider a deliberately simple calculation made for this book. It follows one material, measured in arbitrary mass units. There is no country or particular battery behind the numbers. Every new product lasts exactly ten years. Both imagined systems start with no products in use and no scrap waiting to return. One makes a constant amount of new product each year. The other grows that amount by 10 per cent a year.²

Both use the same collection and recovery rates just described. There is manufacturing waste too. Ten per cent of the material entering manufacture becomes scrap. All of that scrap is collected; 95 per cent is recovered and returned the following year. Material recovered from retired products returns in the year of retirement. We assume every recovered unit meets the quality needed for the same use.

By model year twenty, the two systems have the same 72 per cent end-of-life recycling rate. Yet material from retired products supplies 64.8 per cent of gross manufacturing feed in the constant-output system and about 25.0 per cent in the growing system. Gross feed means all material entering manufacture, including the portion that will become scrap. Returned manufacturing scrap adds 9.5 per cent and about 8.6 per cent, respectively. Fresh material supplies the rest.

Text equivalent: Recovery is not a supply share

Part of figure	Value or meaning
Title	Recovery is not a supply share
Status	ILLUSTRATIVE ONLY
Evidence status	Original assumptions; no observed data or forecast
Period and denominator	Model year 20: shares of gross manufacturing feed
Recovery assumption	Both scenarios recover 72% of retiring material: 80% collected × 90% recovery.
Scenario	Flat new-product demand
Absolute denominator	Gross feed: 111.1 material units
First segment	Retired products: 64.8%
Second segment	Manufacturing scrap: 9.5%
Third segment	Primary material: 25.7%
Scenario	10% annual new-product growth
Absolute denominator	Gross feed: 747.5 material units
First segment	Retired products: 25.0%
Second segment	Manufacturing scrap: 8.6%
Third segment	Primary material: 66.4%
Interpretation	Why the shares differ
Mechanism	Retired products come from an earlier, smaller production cohort when demand grows. A recovery percentage uses retiring material as its denominator; a supply share uses current gross feed.
Model specification	Assumptions
Stocks and lifetime	Start with no in-use material or scrap stocks. New products initially contain 100 arbitrary mass units. Every product lasts exactly 10 years.
Manufacturing return	Manufacturing turns 90% of gross feed into products and 10% into scrap. All scrap is collected; 95% returns one year later.
Retired return	Collected retired material is processed and returned in the retirement year. All recovered material replaces primary feed one for one in the same use.
Model limits	No trade, reuse, quality loss or processing-capacity limits. Unrecovered material leaves this model’s reusable system; it does not vanish physically.
Reporting limit	Shares are rounded to one decimal place. This is not a certified product recycled-content calculation.
How to read the figure	Each stacked bar is 100% of its scenario’s gross manufacturing feed in model year 20. From left to right: returned retired products, returned manufacturing scrap, primary material. Bar lengths compare shares, not absolute quantities. All material is assumed eligible for the same use.

Model: original illustrative arithmetic

Figure 3. The same recovery rate can supply different shares of demand.

Why the gap? The growing system is retiring a smaller generation of products than the one it is making now. Its recycling operation can be just as good at collecting and recovering material while supplying a smaller fraction of current need. The factory is growing faster than its old products can come back.

These results are bookkeeping under chosen assumptions, not measured recycling performance or a forecast. Real products do not all retire on their tenth birthday. Some are repaired, some fail early, some leave the country. Real recovered materials may need more work before a customer will accept them. The simple calculation sets those questions aside so we can see one thing without confusion: a recovery rate and a share of supply answer different questions.

It also shows why the lack of a full loop today should not make us abandon the loop. Even the growing system needs less fresh material than it would under the same production plan without the assumed returns. And the older stock keeps building. We can improve collection now while waiting for products to finish their useful lives.

The material still has to become a product

At a collection centre, a delivery has arrived. Some items have clear labels. Others are damaged or unfamiliar. A scale can tell the operator how much is on the truck. It cannot settle what the next buyer will accept.

The US Environmental Protection Agency describes battery recycling as a chain involving collection, identification and sorting. Shredding can produce a mixture called black mass, which needs further processing. Recovering metals from that mixture still leaves work before they become new batteries. EPA also warns that lithium-ion batteries belong in suitable separate collection systems, rather than ordinary household rubbish or recycling bins, where damage can create a fire risk.³

That account gives us several places to ask whether the system is working. A collection contract may end when the truck reaches a yard. A processing contract may end when a mixed output leaves it. A manufacturer buying a specific input will ask what arrives at the final door. Success at the first handover does not, on its own, establish success at the last.

Suppose the yard receives two loads of equal weight. One comes from a factory that has kept an identified material separate. The other contains assorted old products with uncertain contents. Even if each contains the same mass of a wanted metal, the buyer may face a different amount of work before it can use that metal. The difference belongs in the price and in the plan for handling the load.

Now suppose a new sorting step costs money but lets the yard supply an output that more buyers can use. The return on that step depends on more than the material it saves. It may also bring a more dependable sale. A customer willing to sign a longer contract could make equipment easier to finance. Better information about the load may therefore have value before a single extra unit is recovered.

We can follow the same reasoning into product design. If a label tells the operator what is inside, and if it remains readable after years of use, the operator has less uncertainty. If a part can be removed safely without destroying the surrounding parts, there may be more options for repair or recovery. These are design choices to test against the product’s other duties, including safe use. The easiest item to take apart is not automatically the safest one to operate.

Quality should remain visible at the end. Imagine a recycler claiming a large output, while its customer rejects much of that output. The claimed material has not vanished. It may have another use, or it may need more processing. But it has not yet supplied the product used to justify the claim. A report should distinguish those outcomes.

The model in this chapter assumes that every recovered unit qualifies for its former use. That is a generous assumption made to isolate the time lag. A business plan needs evidence for it. Samples must meet the buyer’s specification, and ordinary deliveries must keep meeting it. Otherwise a theoretical source of supply can become a growing pile awaiting a customer.

Who pays for the return

The household with the old phone is one participant in this system. The worker receiving it is another. A scheme that depends on both should make sense from both sides of the counter.

For the household, a return point needs to be reachable and its rules understandable. Suppose the nearest point opens only while the owner is at work. The service may exist on a map while remaining difficult to use. Add a collection day at a familiar shop and more people might take part. Whether they do is something to measure, not assume from the number of bins installed.

There may be a trust problem too. A phone contains personal information as well as material. A person who does not know how to remove that information has a reason to hesitate. Clear help with a safe handover could matter more to that person than a small cash reward. A collection scheme should learn why items stay where they are before deciding that every owner needs the same incentive.

For the worker, the return must be safe to handle and worth the time it takes. A system that reports a low recycling cost because workers bear the hazard has left part of its cost off the page. The same is true if an operator earns money from the valuable portion while somebody else must pay to manage the remainder.

A fair contract should state who carries those duties. If the project needs safe storage, trained staff or treatment of unwanted output, the budget should cover them. Calling the work circular does not pay the bill.

The incentive can also go wrong inside manufacturing. Suppose a plant becomes much better at making good products and produces less scrap. Its recycling contractor may receive less material. A measure based only on tonnes sent for recycling could record a decline, though avoiding the waste was the better result.

This is why manufacturing scrap and retired products should remain separate in the account. Consider two factories with the same sales. One repeatedly scraps faulty production and recycles it. The other makes more good units on the first attempt. A high recycling total at the first factory cannot settle which uses material more carefully. We need to know what went in, what became a working product, and what had to go round again.

Nor should a recycler be blamed for every fall in available feed. If products last longer because repairs improve, their return is delayed. A factory built on an optimistic timetable may then have less to process. The repair can still be good for the user and for material use. The financing plan was the thing that needed more room for uncertainty.

How might that plan improve? A recycler could start at a scale supported by returns it can reasonably obtain, then expand as evidence builds. A buyer could help finance recovery through a contract tied to accepted output. Public support could pay for a collection service whose benefits reach beyond the value of the recovered metal. Each choice addresses a different gap. None requires pretending that all future discarded products are already available.

A return that gives people more choice

Recycling can change bargaining power because it creates another source from which a buyer might obtain material. How much power changes depends on who controls the return and where the remaining work happens.

Suppose a country collects discarded equipment but can only sell the mixed output to one foreign processor. It has created activity and recovered value. It may still depend heavily on that buyer’s terms. More collection alone does not guarantee a wider set of customers.

The next investment might be better sorting, testing or a process that makes the output acceptable to several buyers. It might instead be a shared facility with nearby countries, if their combined flow can support equipment that each could not use fully alone. These are possibilities to compare against their costs. There is no need to build every stage inside one border for the collection system to benefit the people who use it.

A place can keep value through skilled work, reliable local services and a fair share of the revenue. Ownership matters too. If public money helps create a return network, the agreement can specify what the public receives: affordable access, measured recovery, perhaps a financial return where that is justified. The benefit should be concrete enough to check.

We should apply the same standard to the claim of greater security. If a recycled input still depends on one distant plant to reach the needed grade, that plant remains part of the risk. A new source becomes a stronger outside option when the required processing, quality and delivery can all be relied upon. The word recycled does not establish those things by itself.

But they can be built. Collection staff can learn to identify materials. A testing service can help several firms prove their output. Product makers can design for a return they will one day have to manage. Each improvement can make the next one easier to justify. Progress may begin with a modest flow and become dependable through repeated work.

At the household, the drawer is finally clear enough to close. The phone that still works has a new user. The things beyond repair have gone through a collection route prepared to receive them. Those two outcomes belong in the same account of progress. One preserves the service already built into a product. The other begins the work of making its material available again.

A richer future can come from doing both well: letting objects serve people longer, then giving their materials another job without passing the cost to workers or neighbours who never agreed to carry it.

Sources and limits