We bought a granulator. Here is what it actually cost.

The situation before

Until 2020, end-of-life containers left our yard on somebody else's truck. We sold them as mixed scrap to a processor, at a price that was fine, and that was the end of our involvement. When customers asked what happened to the material, the honest answer was "a recycler took it" — which is not an answer, and we knew it was not an answer.

The specific moment that decided it was an asset recovery customer asking, reasonably, whether their branded containers had been destroyed or resold. We could not tell them. We had no chain of custody past our own gate. That is a bad position for a company whose entire proposition is traceability.

What it cost

The electrical upgrade line is the one to notice. A 60 hp granulator with a high starting load needed a service upgrade that cost nearly a fifth of the machine. Every conversation we have had with another yard about doing this has included the same surprise.

What comes out the other end

The output is 3/8-inch natural HDPE regrind and baled galvanised steel. Both have real markets. Neither is worth what people assume.

So roughly $171,000 of material value against about $48,000 of running cost, which sounds excellent until you remember that selling the same containers as mixed scrap to a processor would have returned something like $96,000 with no capital, no labour and no electrical upgrade. The genuine marginal gain is closer to $27,000 a year against $155,500 of capital — a payback somewhere near six years, before you account for the machine needing replacement.

Why it was still right

1. Chain of custody. We can name the extruder that buys our regrind and the mill that buys our steel. That sentence is the whole reason our asset-recovery reporting is credible, and asset recovery is our highest-value work.
2. Certificates of destruction. We can destroy branded containers and certify it, because the destruction happens twenty metres from the grading station. Several customers buy from us specifically for this.
3. Grading discipline. When the granulator is yours, scrapping a container has a visible internal cost. Graders became measurably more willing to route a marginal container to rebottling rather than to scrap, and our reuse rate went from 78 % to 83 % in the eighteen months after commissioning. That is worth far more than the regrind.
4. Knowing our own numbers. Every mass figure on our sustainability page comes off our own scale. Before 2020 we were quoting somebody else's estimates.

Point three is the one we did not anticipate and the one that actually paid for the machine. Making the cost of scrapping visible changed behaviour upstream of the scrapping. Five percentage points of reuse rate across forty thousand containers a year is thousands of containers that stayed in service, and on our published factors that is around four thousand tonnes of CO₂e a year — an order of magnitude more than the granulator itself will ever be responsible for.