CIRCULATE RESOURCES LIMITED runs a rock-salt washing drum yard for industry at G/F, No 6 Hung Mo Tam, Pat Heung, Yuen Long, Hong Kong. We build the recovery, sorting and telemetry systems that turn leftover by-product streams into clean, measured loops instead of landfill tonnage. Every flow recovered, every loop rinsed and returned.
Our yard is a working model of a circular supply chain. Material arrives gritty and mixed, passes through washing drums that strip salts, fines and coatings, then leaves through sorting bays as separate, grade-true streams. Behind every drum sits a telemetry layer that records mass, moisture and grade so a buyer can trust what the loop returns. This is not a landfill diversion slogan. It is a computer integrated systems design practice aimed at one outcome: a closed loop that keeps running because it pays for itself.
Most industrial surplus is lost not because nobody wants it, but because nobody can measure it cheaply enough to trade it. A wash plant without instrumentation produces a wet, unclassified pile that no procurement team will accept. CIRCULATE RESOURCES LIMITED closes that gap by pairing physical washing and grading equipment with the software that captures the truth of each batch. A single recovery line can serve a metal finisher, a polymer processor and a food manufacturer at once when the data layer is strong enough to keep their materials apart and their compliance records clean.
Our homepage states the promise in three words carved across the drums: Recovered, Rinsed, Returned. Recovery is the hard capture of material that would otherwise be tipped. Rinsing is the wet process that removes the contaminants which make resale impossible. Returning is the logistics and marketplace work that puts the clean stream back into a buyer hands and keeps the loop honest. We score ourselves on how many tonnes complete all three stages in a quarter.
CIRCULATE RESOURCES LIMITED opens its quarterly loop rinse review for operators. Bring your recovered tonnage, your rinse rejects and your return rate, and we will map the leaks in the loop.
We survey the material streams inside a facility and design the pipe, conveyor and drum layout that turns waste into controlled loops. The deliverable is a full mass-balance model, a plant drawing set and a phased build plan you can hand to a contractor. Read the full service page for Circular Flow System Design.
Sensors, weigh cells and edge controllers report live mass, moisture, temperature and throughput from every drum and chute. The telemetry layer feeds the same dashboard your finance team uses to value the recovered material. See the instrumentation detail on our Recovery Line Telemetry page.
Optical, magnetic and density sorters separate mixed streams into pure grades with a consistent target specification. Automated grading removes the human guesswork that causes a buyer to reject a whole load. The complete specification for Sorting and Grading Automation is on the services page.
We build and host the listing, matching and transaction platform where recovered streams meet qualified buyers. Each listing carries the telemetry record behind the batch, so price reflects proven quality. Learn how the marketplace connects yards to buyers under By-Product Marketplace Platforms.
Every loop needs an auditable trail. We assemble the manifests, certificates and sensor logs that stand up to a regulator or a supplier audit. Chain-of-custody data is attached to each tonne from capture to return under Compliance and Chain-of-Custody Data.
For clients who want the outcome without running the plant, we operate the loop end to end and report on recovered, rinsed and returned tonnage each month. Stewardship includes maintenance, calibration and buyer relationships, described fully under Managed Loop Stewardship.
When a recovery program stalls, it is rarely the technology that failed. It is one of three systemic leaks, and each one is fixable with the right instrumentation and design discipline.
Without reliable mass and moisture data, a recovered stream is a guess. Buyers discount guesses heavily, so the material is quietly tipped instead. We install weigh cells and inline moisture sensing so the loop has a number attached to every batch.
One dirty tonne can poison a clean pile. Our washing drums and graded sorting bays keep contaminated and clean material physically separate, with interlocked gates that refuse a mixed batch until it is re-rinsed.
Even a clean, measured stream fails if a buyer cannot see its history. Chain-of-custody records and a public grade specification let a procurement team approve a supplier without a site visit, which shortens the loop dramatically.
Every engagement follows the same disciplined sequence. The order matters, because instrumentation installed after the fact always costs more than instrumentation designed in.
We walk the site, sample each stream and build a mass balance. You learn exactly what leaves the gate and what it is worth.
Drum sizes, wash chemistry, retention time and chute angles are specified against your real contamination profile, not a catalogue default.
Telemetry is wired into the drums and sorting bays so mass, moisture and grade are captured without an operator writing anything down.
Recovered grades are listed on the marketplace and matched to buyers whose specification matches the measured output.
We monitor return rates, recalibrate sensors and report monthly until the loop runs without supervision.
These are the indicators we track for every managed loop. They are deliberately few, because a yard that measures everything measures nothing useful.
CIRCULATE RESOURCES LIMITED works within the Computer Systems Design and Related Services industry, and our loops reach every corner of the Professional, Scientific, and Technical Services sector. A recovery line does not care what industry the by-product came from, only how it behaves in a drum.
Metal fines, spent wash liquor and packaging trim move through our drums and return as feedstock. Telemetry keeps each stream separate so a finishing line can reclaim its own material.
Organic residue, rinse water solids and off-spec product are washed and graded into animal feed, compost substrate or energy feedstock with full chain-of-custody records.
Solvent drums, glass and polymer consumables are logged by batch, washed to specification and either returned to a supplier or routed to a qualified processor.
Crushed aggregate, gypsum board and metal reinforcement are sorted into grade-true piles that a new project can legally accept as recycled content.
Damaged goods, pallets and packaging film are recovered at the dock, measured and listed before they ever reach a skip, keeping value inside the operation.
Material libraries, samples and studio offcuts become a measured loop that supports a verifiable sustainability claim instead of an estimate.
We will sample it, model its loop and tell you what a rinsed, measured tonne is worth.