Most people planning a plastic recycling plant start with a machine list. That is the last thing to settle, not the first. The machines are the easy part, and the part a supplier can fix in an afternoon once everything above them is known.
The parts that sink projects sit upstream and downstream of the equipment — a feedstock contract that never materialised, a building with 4 m of clear height under a line that needs 6 m, a transformer sized from the wrong column of a specification sheet. What follows is a working sequence for the whole project, with building and utility figures taken from the published SUHUI plastic recycling washing line configurations so the arithmetic can be checked against real numbers.
Seven decisions, each one closing off options for the ones below it.
Start With the Feedstock and Not the Machine List
Every workable plastic recycling plant starts from a feedstock assessment rather than an equipment catalogue. Polymer type, contamination level, delivered form and contracted volume between them decide the process route, the capacity tier and most of the capital cost. A machine list drawn up before that assessment is a guess wearing a specification.
Six things about the incoming material, each of which changes the plant.
The assessment is short. Six properties of the incoming material carry almost all of the consequences, and each of them can be established from a sample and a written supply offer rather than from a market report.
| What to establish | Why it changes the plant | How to establish it |
|---|---|---|
| Polymer and how mixed it is | Decides whether you need density separation, optical sorting, or neither. A single-polymer stream removes a whole section of line | Sort a representative sample by hand and weigh the fractions |
| Contamination type and level | Sets the number of washing stages, whether hot washing is needed at all, and the yield you will actually see | A trial wash on your own material, not a supplier’s demonstration material |
| Delivered form | Baled, loose, whole containers and ground regrind each need different intake and size reduction | Photograph a real delivery, not a sample bag |
| Moisture and organic residue | Wet or food-soiled material shifts the plant from a dry route to a full wash route, which multiplies utilities | Weigh a sample wet, dry it, weigh it again |
| Bulk density | Film at 30 kg/m³ and rigid regrind at 400 kg/m³ need completely different storage volume and feeding hardware | Fill a known volume and weigh it |
| Contracted tonnes per month | Sets the capacity tier. This is the number most plans overstate | Signed supply agreements, not verbal availability |
One row does more damage than the rest when it is wrong. Contracted volume is routinely written down as what is theoretically available in the region rather than what somebody has agreed to deliver to your gate at a price, and a line sized on regional availability then runs at part load. The contamination row deserves the same scepticism, because dirty material both costs more to process and yields less saleable output per tonne bought.
Size the Plant Around Volume You Can Actually Contract
Capacity should be set from contracted monthly tonnage divided by realistic running hours, then rounded down to a standard configuration rather than up. Rating a line above your supply means paying for installed power, floor area and a crew that stand idle, and none of those costs fall when the line is not running.
The arithmetic is straightforward once the contract is real. Monthly contracted tonnes, divided by the days you will operate, divided by the shifts per day, divided by the productive hours in a shift, gives the kilograms per hour the plant has to sustain. Productive hours are the trap — a nominal eight-hour shift rarely delivers eight hours of running once startup, changeover, screen changes and cleaning are counted.
The same contracted tonnage gives three different machine sizes depending on how many shifts you run.
Shift pattern is the other lever, and it is usually cheaper than machine size. A smaller line over two shifts uses less floor area, less installed power and less capital than a larger line over one shift for the same annual output, at the cost of more labour and a supervisor structure.
There is a hard floor underneath all of this. Below a few hundred kilograms an hour a plant still carries a full crew, a leased building, a connection charge and a management layer, none of which scale down with the machine. Published operator counts make the point — a film washing line needs three operators per shift at 250 to 300 kg/h and four at 1,700 to 2,000 kg/h, so the crew barely changes while throughput rises almost sevenfold.
Match the Process Route to What the Material Needs
The process route is chosen by the feedstock, not by preference. Clean in-house scrap needs size reduction and pelletizing only. Post-consumer film and bottles need a full wash line before pelletizing. Choosing the wash route when a dry route would do adds a water system, a wastewater obligation and a large part of the building.
Three routes, and the jump in cost happens when water enters the process.
| Route | Suits | Stations required | What it commits you to |
|---|---|---|---|
| Dry route — size reduce and pelletize | Clean post-industrial scrap, offcuts, purgings, single polymer | Shredder or crusher, then a pelletizing line | The smallest building and no water infrastructure at all |
| Wash route — sell washed flake | Post-consumer material where a local buyer takes flake | Intake, size reduction, multi-stage washing, separation, dewatering, drying | Water treatment, a discharge route, steam if hot washing is needed |
| Wash and pelletize — sell pellet | Post-consumer material where pellet pricing justifies the extra stage | Everything above plus compacting or feeding, melt filtration and pelletizing | All of the above plus melt filtration consumables and a second skill set |
The choice between selling flake and selling pellet is the one worth slowing down on. Pelletizing adds capital, floor area, power and a different operator skill set, and it earns its place only where the local price gap is real and durable. Our guide to the plastic recycling line covers how the two halves connect.
Material type also moves the route more than people expect. The PET bottle sorting washing line carries two stages of optical sorting and a label removal unit before crushing, because PVC bottles and sleeve labels have to leave the stream before they can contaminate flake. A PP PE soft film recycling washing line has no optical sorter at all and relies on float-sink density separation instead, because PP and PE both float and their common contaminants sink. Same industry, different plant.
Work Out What the Building Actually Has to Provide
A recycling line is long and tall rather than compact, and the building is the hardest constraint to fix later. Published SUHUI configurations put a 250 to 300 kg/h film washing line at 29 m long by 10 m wide by 5 m high, and a 1,700 to 2,000 kg/h line at 90 by 15 by 6 m.
Length grows fastest, clear height barely moves, and the washing line sets both.
| Published configuration | Rated input | Footprint L x W x H | Installed power | Operators per shift |
|---|---|---|---|---|
| Film washing SHW300 | 250–300 kg/h | 29 x 10 x 5 m | 195 kW | 3 |
| Film washing SHW1000 | 800–1,000 kg/h | 50 x 12 x 6 m | 446 kW | 4 |
| Film washing SHW2000 | 1,700–2,000 kg/h | 90 x 15 x 6 m | 760 kW | 4 |
| PET bottle washing PET500 | 500 kg/h | 700 m² required space | 220 kW | 6 |
| PET bottle washing PET3000 | 3,000 kg/h | 1,500 m² required space | 590 kW | 12 |
| Film compacting pelletizing SHP80 | 150–250 kg/h | 10.3 x 6.2 x 3.5 m | 37–45 kW compactor plus 55–75 kW extruder | — |
| Film compacting pelletizing SHP180 | 1,000–1,200 kg/h | 14.8 x 6.85 x 4.85 m | 160–185 kW compactor plus 315–355 kW extruder | — |
Three things fall out of that table that a site drawing will not tell you. The first is that floor area scales more slowly than throughput. The smallest film line occupies 290 m² at around 275 kg/h, roughly one square metre per kilogram per hour, while the largest occupies 1,350 m² at around 1,850 kg/h, roughly 0.7. Six or seven times the output needs under five times the floor.
The second is that clear height is set by the washing line, and set early. Five metres covers the smallest configuration and six covers everything above it, because the dewatering and thermal drying sections are vertical. Pelletizing runs lower at 3.5 to 4.85 m, so it never governs. A building with 4 m under the roof steel cannot take a washing line without civil work.
The third is that the same nominal capacity needs different floor area depending on the material. A PET line rated at 500 kg/h asks for 700 m², while a film line at 400 to 500 kg/h occupies 35 by 12 m, or 420 m². The difference is the bale breaking and sorting hall PET bottles need and film does not.
Material handling sits outside the equipment footprint entirely. Incoming storage is bulky, especially baled film at low density, and finished goods, a weighbridge, truck turning and a maintenance area all have to fit around the line. Budget the building on footprint plus handling, never on footprint alone.
Size Power, Water and Steam Before the Line Is Ordered
Utilities are ordered from the utility company on lead times measured in months, so they have to be settled early. The figure that matters for the electrical supply is installed power, not running consumption, and the two are different numbers on the same specification sheet. Reading the wrong one undersizes the transformer.
Installed power sizes the transformer, running consumption sizes the electricity bill.
| Published configuration | Installed power | Running consumption | Water | Steam | Chemical |
|---|---|---|---|---|---|
| Film washing SHW300 | 195 kW | 120 kWh | Closed-loop recirculation | 0–150 kg/h | 0–2 kg/h |
| Film washing SHW1000 | 446 kW | 280 kWh | Closed-loop recirculation | 0–300 kg/h | 0–8 kg/h |
| Film washing SHW2000 | 760 kW | 490 kWh | Closed-loop recirculation | 0–600 kg/h | 0–12 kg/h |
| PET bottle washing PET500 | 220 kW | 110 kWh | 0.7 ton/h | 500 kg/h | 10 kg/h |
| PET bottle washing PET3000 | 590 kW | 460 kWh | 4.5 ton/h | 1,200 kg/h | 28 kg/h |
Put the first two columns side by side and the gap is consistent — installed power runs roughly 1.3 to 2.0 times running consumption across these configurations. Motors are sized for starting torque and worst case rather than average duty, so a supply contracted at the running figure trips on startup.
Steam is the utility most often left out of an early budget, and it splits the two materials sharply. The film line publishes steam starting at zero, because its hot wash stage is optional. The PET line publishes 500 to 1,200 kg/h with no zero option, because two stages of hot caustic washing at 80 to 90 °C are how PET bottles get clean. Steam at that rate means a boiler, a fuel supply and a boiler operator.
Water divides the same way. Closed-loop treatment cuts fresh water demand substantially, and the HDPE rigid milk bottle recycling washing line publishes a reduction of up to 70% on that basis. Closed loop is not zero discharge, though — solids concentrate in the circuit and a sludge stream still leaves the site.
That last point is a permit rather than a pipe. Industrial process water discharged to a sewer or a watercourse is regulated, and in the United States it falls under the EPA industrial wastewater programme, with equivalent regimes elsewhere. Establish which permit applies and how long it takes before the site is leased, because in many jurisdictions it is the longest item on the project schedule.
Draw the Equipment List Last
By this point the equipment list mostly writes itself, because the feedstock has chosen the route and the capacity has chosen the size. What remains is matching each station to the material and deciding where to spend, and on a recycling line the answer is usually size reduction and filtration rather than the extruder.
The list follows from the route, which followed from the feedstock.
A full plant runs through six equipment groups. Intake and size reduction reduces bales, whole containers or loose material to a flake the wash line can carry, and the crusher and shredder range covers single-shaft, double-shaft and granulator options according to what arrives. Washing and separation removes what is stuck to the material and what is mixed with it. Dewatering and drying then takes moisture below 5% for film flake and below 1% for PET and rigid bottle flake.
Pelletizing is the fourth group, and the PP PE film compacting pelletizing line shows why film needs its own architecture — washed film flake is too light to fall into a screw under gravity, so a compactor sits ahead of the extruder. Rigid material feeds a rigid plastic granulating pelletizing line directly. Melt filtration is the fifth and the one buyers under-specify most consistently, because a screen pack sized for clean material becomes an hourly stoppage on contaminated feed. Auxiliaries are the sixth, from metal separation at intake to a plastic film squeezer granulating machine.
On budget, two things are worth saying and one is worth refusing to say. Machine budgets are knowable in advance, published as reference ranges on the SUHUI plastic recycling machine hub and broken down by type in our guide to what a plastic recycling machine cost includes. A firm quotation follows material analysis rather than preceding it. And no supplier can honestly quote a total plant cost or a payback period, because building, utility connection, permits, freight, duties and civil work are local to your site and often exceed the machines.
Plan Installation and the Ramp to Rated Output
Installation is a project phase with its own schedule, not a delivery event. Equipment arrives in containers over several weeks, is positioned, connected to power, water and drainage, then commissioned station by station before the line is run as one system. Rated output arrives after that, not on the first day.
Foundations and services come before the containers arrive, not after.
The work that must finish before the first container is opened is easy to underestimate. Foundations and floor loading, cable trays and the incoming supply, water and drainage runs, compressed air, steam pipework, and an access route for lifting equipment. Each is a local contractor with a local lead time, and together they are the usual reason a plant sits half-built beside a full container yard.
Commissioning then runs in a fixed order. Stations are tested empty, then the line runs on water only, then on a small quantity of the real feedstock, then continuously. Trial running on your own material rather than clean demonstration material is the step worth insisting on.
Ramp-up belongs in the cash flow plan. A new crew, unfamiliar material and a line still being tuned do not produce rated output in week one, and the shortfall is real money once financing is drawn. Plan working capital around a ramp measured in weeks rather than around the nameplate. The published recycling line project examples show configurations that reach steady production in practice.
Staff the Plant for the Shifts You Intend to Run
Operator numbers are published per shift, so the staffing bill is that figure multiplied by shifts, plus maintenance, supervision and quality control that the equipment specification never mentions. Those additional roles do not scale with capacity, which is another reason small plants struggle to carry their overhead.
| Published line | Rated input | Operators per shift | What drives the number |
|---|---|---|---|
| Film washing SHW300 | 250–300 kg/h | 3 | Feeding, sorting station and line watch |
| Film washing SHW1000 | 800–1,000 kg/h | 4 | Same tasks at higher feed rate, one extra pair of hands |
| Film washing SHW2000 | 1,700–2,000 kg/h | 4 | Automation absorbs the extra throughput |
| PET bottle washing PET500 | 500 kg/h | 6 | Manual sorting station ahead of the optical sorters |
| PET bottle washing PET3000 | 3,000 kg/h | 12 | Sorting labour scales with bottle count, not with tonnage |
Read the two materials against each other and the difference is instructive. Film washing needs three to four operators across its whole published range, while PET needs six at 500 kg/h and twelve at 3,000 kg/h, because bottle sorting is a headcount task and bottles per tonne do not fall as the line grows.
Three roles sit outside the operator count and belong in the plan from the start. A maintenance technician, because knives, screens, seals and bearings are consumables here rather than failures. A quality function checking moisture, contamination and flake size on a schedule, because output that misses specification is sold at a discount. And a shift supervisor once you run more than one shift.
Frequently Asked Questions
What is a plastic recycling plant?
A plastic recycling plant is an industrial facility that turns collected plastic waste into a saleable raw material, usually washed flake or recycled pellet. A typical plant runs intake and sorting, size reduction, washing and separation, dewatering and drying, and optionally pelletizing, as one continuous line.
How much space does a plastic recycling plant need?
Published SUHUI configurations run from 29 by 10 m for a 250 to 300 kg/h film washing line up to 90 by 15 m at 1,700 to 2,000 kg/h. PET bottle lines ask for 700 to 1,500 m² across their range. Add material storage, finished goods and truck access on top of the equipment footprint.
What clear height does a recycling washing line need?
Five metres for the smallest published film washing configuration and six metres from roughly 400 kg/h upward, because the dewatering and thermal drying sections are vertical. Pelletizing sections are lower at 3.5 to 4.85 m, so the washing line sets the building height rather than the pelletizer.
Which costs of a recycling plant cannot be quoted from China?
Everything that is fixed to your site. Building or rent, the electrical connection, water supply and effluent treatment, permits, civil works, freight, duties and installation labour are all priced locally and together often exceed the equipment. A supplier can quote the machines against your material; the rest has to be priced where the plant will stand.
How much electrical power does a plastic recycling plant need?
Size the supply on installed power rather than running consumption. Published washing line configurations show 195 kW installed against 120 kWh running at the small end and 760 kW against 490 kWh at the large end, so installed power sits roughly 1.3 to 2.0 times above the running figure.
How long does it take to install and commission a recycling line?
The schedule is driven by site preparation rather than by the equipment. Foundations, incoming power, water and drainage have to be finished before containers are opened, then stations are tested individually, then with water, then with your own feedstock. Plan for a ramp to rated output over weeks.
How many people does it take to run a plastic recycling plant?
Published figures are three to four operators per shift for film washing lines across the whole capacity range, and six to twelve for PET bottle lines where manual sorting is involved. Add maintenance, quality control and a shift supervisor, none of which scale down with plant size.
Turning the Route Into an Equipment List
- Plastic Recycling Machine Range — machine types and published reference ranges for the capital budget line
- Plastic Recycling Pelletizing Line — the extra stage to cost only if pellet pricing beats flake locally
- Plastic Recycling Line Guide — which line the chosen output, regrind, flake or pellet, actually needs
- Plastic Recycling Machine Cost — FOB reference bands by machine type, and what an FOB price excludes
Have a Material You Need to Process?
Send the polymer, its form and your target output. We will come back with a line configuration and a realistic budget range.
