Rigid Plastic Recycling: Optical Sorting, Hot Washing & Flaking (PET & HDPE)

Beverage plastic consumption across East Nusa Tenggara generates massive volumes of discarded post-consumer PET bottles and HDPE containers that pollute coastal coastlines and waterways. Shipping loose, uncompacted plastic bottles to Java is economically unviable due to high volumetric freight costs. This enterprise establishes a mechanized plastic recycling and washing plant in KIB featuring optical color sorting, heavy shredding, hot caustic washing, friction drying, and high-density flaking. Compacting shredded flakes into 1-tonne jumbo bags increases shipping density by over 800%, enabling profitable export to textile and bottle-grade recyclers in East Java utilizing discounted backhaul container rates from Tenau Port.

Products & Business Formats

Hot-Washed Clear PET Bottle Flakes (Bottle-to-Bottle / Fiber Grade)

Precision-shredded, hot-caustic washed, and friction-dried transparent PET flakes (moisture < 1%, PVC < 50 ppm) for polyester fiber and rPET resin plants.

Color-Sorted High-Density Polyethylene (HDPE) Regrind Flakes

Shredded and washed HDPE flakes (blue, red, white, mixed) derived from beverage caps, detergent jugs, and cosmetic bottles for injection molding.

Polypropylene (PP) Crushed Flakes from Woven Sacks & Caps

Cleaned and classified PP flakes derived from discarded agricultural sacks and bottle caps, supplied to regional plastic bag and container extruders.

Baled Unprocessed PET Bottles for External Flaking Mills

Hydraulically compacted bales of sorted, de-capped PET bottles for direct container shipment to external secondary washing plants in Java.

Business model

Revenue comes from margins on high-quality dry plastic-flake sales per metric tonne (FOB Tenau or Surabaya warehouse), the added-value difference from dirty bottles to clean flakes, and regular shipments in 500–1.000 kg jumbo bags.

Development stages

1. Stage 1 — Open manual sorting facilities and a hydraulic baling press with capacity of 3–5 tonnes/day for baled PET bottles at KIB Bolok.
2. Stage 2 — Install automatic de-labelers and 50 HP crushers to produce dry flakes in 1-tonne jumbo bags.
3. Stage 3 — Build a hot-wash line with an independent water-circulation system to produce glue-free flakes meeting export food-grade standards.

Massive consumption of bottled drinking water, soft drinks, and packaged consumer goods across East Nusa Tenggara generates hundreds of tonnes of discarded post-consumer PET bottles and HDPE containers monthly. In the absence of local processing, light plastic bottles litter beaches or are burned open-air. Crucially, shipping loose bottles to Java is economically unviable due to high volumetric sea freight. Establishing a mechanical shredding, hot washing, and flaking plant in KIB compresses volume by 800%, enabling highly profitable export to textile and bottle recyclers in East Java utilizing discounted backhaul container rates from Tenau Port.

Market Demand & Potential Buyers

• Major synthetic polyester staple fiber (PSF) and textile spinning mills in East Java and West Java
• Certified food-grade rPET bottle-to-bottle recycling resin manufacturers in Surabaya and Cikarang
• Plastic injection molders producing domestic household basins, crates, and conduit pipes
• Export container shipping lines seeking dense return cargo out of Tenau Port

Market Evidence & Context

Existing plastic recycling in Kupang is limited to informal collectors who manually stomp bottles into loose sacks or use small agricultural shredders without washing. Their flakes are contaminated with glue, labels, and sand, commanding bottom-tier prices. A modern washing plant in KIB deploying automated de-labeling, hot caustic washing, float-sink separation, and friction drying commands top-tier premium pricing.

Post-consumer plastic bottles and rigid containers are procured through municipal waste bank cooperatives (Bank Sampah), scavengers, and commercial collection hubs across Timor.

Seasonality & Supply Continuity

Operating steadily year-round. Plastic collection volumes surge during hot dry season months when beverage consumption spikes and during festive holiday celebrations.

Collection & shipping

Loose bottles are gathered in high-sided cage trucks, processed into flakes at KIB, packed into 1-tonne jumbo bags, and drayed 7.9 km to Tenau Port.

Procurement & handling costs

Raw plastic bottle procurement and collection trucking represent 50%–60% of flake sales value. High gross margins achieved through value-added hot washing and backhaul freight savings.

• Use of Waste Processing Equipment to Improve Muara Abu Waste Bank Productivity
• PET Plastic Bottle Recycling Facility Producing Food-Grade Pellets
• Kupang Container Terminal Service Profile

KIB provides the certified industrial setting: master AMDAL coverage for washing wastewater, direct proximity to Tenau Port for empty return containers, and low-cost space.

Direct Utilization of Empty Container Backload Rates at Tenau Port (7.9 km)

Captures deeply discounted return shipping rates on container ships returning to Surabaya, turning heavy plastic flakes into an unbeatable export business. Road Distances from KIB Bolok to Key Port, City, and Airport Hubs

Master AMDAL Zoning for On-Site Plastic Washwater Pre-Treatment

Allows the tenant to install closed-loop settling ponds, rotary screens, and water filtration skids legally under KIB’s estate environmental permit. Bolok Industrial Park Profile

Strategic Hub for Consolidating Plastic from Island Regencies

Positioned close to Bolok ferry harbor (3.6 km), allowing cost-effective bulk receiving of baled bottles arriving by boat from Flores, Rote, and Sumba. Road Distances from KIB Bolok to Key Port, City, and Airport Hubs

Investors can deploy a complete PET/HDPE bottle de-labeling, crushing, hot-washing, and drying plant (1–2 tonnes/hour capacity) inside a ready-built KIB warehouse.

Business process

1. Raw bottle receiving, weighbridge verification, and manual sorting to extract foreign polymers (PVC) and colored contaminants
2. Automated high-speed rotary de-labeler machine stripping external PVC/PP shrink labels and bottle caps without crushing bottles
3. Wet granulation in heavy-duty rotary shredder with water injection, reducing bottles to uniform 10–12 mm flakes while pre-washing
4. Continuous hot caustic washing (80°C–85°C) with caustic soda and detergent to dissolve label adhesives, syrups, and surface oils
5. Float-sink density separation: heavy PET flakes (density 1.38 g/cm³) sink to tank bottom while light PP/PE cap flakes float for separate recovery
6. Multi-stage fresh water spray rinsing and high-speed centrifugal friction drying (reducing surface moisture below 1%)
7. Zig-zag air classification to remove residual label dust, magnetic metal detection, and packing into 1-tonne polypropylene jumbo bags

Initial Capacity & Production Scale

Continuous High-Speed Rotary Bottle De-Labeling Machine

Automated de-labeling barrel with adjustable alloy steel blades stripping up to 98% of external shrink-sleeve labels at 1.5 tonnes/hr.

Heavy Wet Plastic Granulator & Shredder

Heavy-duty rotary knife shredder with continuous water flushing, hardened D2 tool-steel blades, and 12 mm sizing screens.

Continuous Steam-Heated Hot Caustic Washing Tank

Stainless steel continuous washing trough with internal screw augers, steam injection heating coils, and automated chemical dosing.

On-Site Modular Washwater Pre-Treatment Skid

Under KIB’s estate AMDAL framework, tenant installs micro-screening, pH neutralization, and dissolved air flotation (DAF) to recycle 75%+ of washwater.

Dedicated Production Facilities (Investor Scope)

Bottle receiving apron, rotary de-labeler, wet granulator, hot wash tank, float-sink tank, centrifugal friction dryer, zig-zag classifier, and wastewater pre-treatment skid.

Transforming post-consumer plastic waste into export-grade, hot-washed flakes and exploiting discounted empty return container freight to Surabaya captures high-margin manufacturing profits while cleaning NTT’s environment.

• PET Plastic Bottle Recycling Facility Producing Food-Grade Pellets
• Kupang Container Terminal Service Profile
• Use of Waste Processing Equipment to Improve Muara Abu Waste Bank Productivity

Primary operational risks include PVC bottle contamination ruining PET flake batches, washwater effluent environmental compliance, and polymer resin price swings.

PVC bottle contamination causing thermal degradation and black specks during polyester fiber melting

Implement strict pre-sorting inspections and install automated optical NIR or optical transmission sorting sensors on the infeed conveyor.

Washwater discharge violating industrial estate environmental chemical standards

Deploy closed-loop modular filtration recycling 80%+ of washwater, routing blowdown through automated neutralization and DAF clarifiers.

Sharp drops in virgin PET resin prices pulling down recycled flake market values

Focus on certified hot-washed bottle-to-bottle grade flakes which trade at a structural premium driven by corporate mandatory recycled content targets.

Data sources include Association of Plastic Recyclers (APR) flake quality specifications, Pelindo Tenau empty container backhaul logistics data, and KIB site environmental frameworks.

Interested in developing this business at KIB?

Submit target washing line throughput (TPH), water/power consumption specifications, and warehouse footprint requirements to KIB management to lease a suitable facility.

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