A Practical Cost Breakdown for a 500-Kg ALS2 Batch

A 500-kg ALS2 batch provides a useful scale for understanding the operating economics of acidless precious-metals recovery. At this volume, costs are large enough to expose the main drivers of a recycling run, while still being manageable for a compact plant serving electronic waste and WEEE streams.

The figures below are an illustrative planning model for a European facility. They describe the processing cost of one batch rather than the value of the recovered gold, silver, palladium, copper, or other materials. Actual results will depend on feed composition, labor rates, equipment utilization, energy contracts, local waste rules, and the quality of the incoming material.

A practical estimate should also separate cash operating expenses from capital investment. Building the facility, purchasing reactors and separation equipment, financing the plant, and obtaining permits require a different financial model. The calculation here focuses on the direct and semi-direct expenses attached to processing 500 kg of prepared electronic scrap.

Establishing The Batch Assumptions

The model assumes that 500 kg of circuit-board-rich WEEE has already been collected and delivered to the plant. The material still requires inspection, sorting, size reduction, and preparation before it enters the acidless separation sequence. Feedstock acquisition is treated as a processing input with a neutral value, because purchasing costs can vary sharply and some suppliers may pay a recycler to accept material.

The batch is assumed to run during a normal production shift, supported by two operators and shared technical supervision. It includes routine screening of the recovered fractions, internal material movements, standard personal protective equipment, and compliant handling of residues. It does not assume an unusual breakdown, a major changeover, or a difficult contamination event.

For budgeting purposes, the calculation uses euros and excludes VAT. It also excludes revenue from recovered metals, depreciation, interest, corporate taxation, and long-term research expenditure. Those items should be added when calculating profitability, return on investment, or the payback period for a complete ALS2 plant.

Where The Money Goes

The largest expenses in a 500-kg run are usually labor, consumables, feed preparation, residue management, and the general cost of keeping the plant available. Electricity is important, but it is unlikely to dominate the budget in the same way it might in a highly thermal or energy-intensive refining process.

The following estimate gives each cost category a working allowance. It is designed for early-stage planning, supplier comparisons, and sensitivity analysis rather than as a fixed quotation.

Cost category Basis for estimate Batch cost (€) Cost per kg (€)
Feed inspection and preparation Sorting, removal of unsuitable items, basic classification 250 0.50
Mechanical size reduction Shredding, screening, transfer, and wear allowance 140 0.28
Labor Operators, supervisor allocation, loading, cleaning, records 420 0.84
ALS2 process consumables Separation media, handling materials, and replenishment 310 0.62
Electricity Motors, pumps, controls, extraction, and auxiliary equipment 95 0.19
Water and process utilities Make-up water, cleaning, and utility consumption 35 0.07
Quality control Sampling, weighing, analysis, and batch documentation 90 0.18
PPE and environmental controls Protective equipment, filters, and routine monitoring 55 0.11
Residue and waste handling Packaging, internal storage, transport, and treatment allowance 125 0.25
Maintenance reserve Wear parts, lubrication, inspections, and minor repairs 100 0.20
Site overhead allocation Rent, administration, insurance, software, and compliance 180 0.36
Operating contingency Approximately 10% of variable and semi-variable costs 180 0.36
Estimated batch operating cost 1,980 3.96

At this level, the indicative processing cost is about €3.96 per kilogram, or approximately €1,980 for the complete 500-kg batch. The number should be read as a baseline. A facility with automated sorting, lower labor costs, or high batch throughput could achieve a lower unit cost, while a plant handling mixed, contaminated, or poorly documented feed may spend considerably more.

Feed Preparation And Material Quality

Feed preparation often determines whether the rest of the batch proceeds efficiently. Printed circuit boards can contain connectors, batteries, screens, plastics, fasteners, ceramics, and epoxy-rich components. Removing unsuitable items before processing reduces contamination and protects downstream equipment. The allowance of €250 covers receiving checks, manual sorting, weighing, and preparation labor.

Mechanical preparation adds another €140 in the example. This includes electricity and wear for shredding or size reduction, screening, transfer between stages, and routine cleaning. The actual amount can rise if the feed contains large metal pieces, bulky assemblies, or materials that require repeated passes through the equipment.

Material quality also affects the economics of recovery. A clean, concentrated fraction may produce a strong metal yield with relatively little preparation. A low-grade mixture can generate similar handling costs while delivering less precious-metal value. This is why incoming inspection should record mass, category, visible contamination, and an estimated metal profile before the batch is approved.

Epoxy-rich circuit-board fragments deserve particular attention because they can influence separation behavior, handling, and residue quality. The ALS2 project discusses epoxy-rich fragments as part of the broader challenge of processing complex electronic waste rather than treating every board fraction as identical.

Process Consumables And Utilities

The €310 consumables allowance covers materials consumed during the acidless separation process, including separation media, liners, filters, containers, labels, and replenishment items. It should not be confused with the purchase of the electronic scrap itself. Consumption rates need to be confirmed through production trials because they depend on the composition and moisture content of the feed.

A useful way to control this cost is to record consumption per batch and compare it with recovered mass and feed category. A batch that uses 15% more consumables but delivers a significantly better recovery may still be economically attractive. Conversely, unexplained overuse can indicate poor preparation, excessive carryover, inefficient rinsing, or a process-control problem.

Utilities are comparatively modest in this model: €95 for electricity and €35 for water and general services. These allowances include motors, pumps, controls, extraction, lighting during the production shift, cleaning, and make-up water. Sites with high electricity tariffs, long idle periods, or intensive ventilation requirements should adjust the estimate upward.

The acidless character of the process can also affect the cost profile of environmental controls and chemical storage. That does not remove the need for disciplined waste management, monitoring, worker protection, or regulatory compliance. It changes the types and quantities of controls that need to be budgeted.

Labor, Quality, And Compliance

Labor is estimated at €420 per batch, covering operators, supervision, loading, cleaning, process records, and material movements. This assumes a compact plant with a relatively short production cycle. If employees must remain present during extended waiting periods, or if sorting is highly manual, labor can become the dominant expense.

Quality control is assigned €90. That amount covers sampling, weighing, labeling, basic analysis, reconciliation of input and output masses, and documentation of recovered fractions. In commercial recycling, these activities support customer confidence and help identify changes in feed quality. They also provide evidence that the plant is controlling residues and recovered products consistently.

PPE and environmental controls add €55 in the baseline. This may include gloves, protective clothing, eye protection, respiratory protection where required, filter changes, spill materials, and routine workplace checks. The exact requirements should come from a site-specific risk assessment rather than a generic cost model.

Residue handling is assigned €125, including packaging, temporary storage, internal movement, transport allowances, and external treatment where applicable. The acidless approach may reduce some hazards associated with conventional acid refining, but residues can still contain metals and must be classified and managed under applicable waste rules.

Throughput And Cost Sensitivity

The €3.96-per-kilogram estimate assumes that the plant is used efficiently. Fixed and semi-fixed costs are spread across a single 500-kg run in the calculation, but the real unit cost can fall when the same staff, facility, and supervision support several batches per day or week. Better scheduling can therefore matter as much as a small reduction in electricity consumption.

A useful sensitivity test changes three variables: labor time, consumables, and feed preparation. If each rises by 25%, the batch cost increases by roughly €245 before any additional contingency. If throughput improves enough to reduce labor and overhead allocations by 20%, the unit cost could fall by about €0.45 to €0.60 per kilogram, depending on the facility’s fixed-cost structure.

Metal yield remains the decisive commercial variable. Processing cost should be compared with the expected net value of recovered products after assay, refining, transport, selling fees, and possible price deductions. A low-cost batch is not necessarily profitable if the feed contains little recoverable precious metal, while a more expensive batch may create strong value from a concentrated, high-grade fraction.

Plant managers should therefore track cost per kilogram alongside cost per kilogram of recovered precious metal. The second measure links operating performance to actual output and can reveal whether a preparation or quality-control expense is improving the result.

Recommendations For A Reliable Budget

A pilot program should use real operating records rather than relying indefinitely on planning allowances. After three to five comparable batches, the operator can replace assumed figures with measured labor time, energy consumption, consumable use, residue mass, and recovery performance. That dataset will support a more credible cost per batch and a stronger investment case.

The same records can help compare ALS2 processing with alternative refining routes. The comparison should include environmental controls, chemical storage, permitting, worker protection, waste treatment, and logistics—not just the visible cost of energy or reagents.

A 500-kg run budgeted at approximately €1,980 offers a practical starting point for discussions with equipment suppliers, recyclers, and project financiers. Use it as a live operating model, update each line with local quotations and measured data, and connect the final cost to verified recovery yields before approving regular production.