Seaweed Industrial Processing & Semi-Refined Carrageenan (SRC) Plant

East Nusa Tenggara is one of Indonesia’s premier seaweed cultivation regions, yielding high volumes of Eucheuma cottonii (Kappaphycus alvarezii) across shallow coastal waters in Kupang Regency, Rote Ndao, and Sabu Raijua. Historically, over 90% of local dry seaweed has been shipped raw in low-density bales to Surabaya or abroad, forfeiting local economic value and incurring substantial ocean freight costs. Establishing an alkaline extraction and drying facility inside KIB converts washed dry seaweed into Semi-Refined Carrageenan (SRC) and Alkali Treated Cottonii (ATC) chips. The plant benefits from KIB’s master AMDAL environmental coverage, allowing installation of dedicated on-site neutralization and sedimentation basins while remaining 7.9 km from Tenau Container Port for global containerized export.

Products & Business Formats

Semi-Refined Carrageenan (SRC) Chips & Flakes

Alkaline-treated, neutralized, washed, and dried Kappaphycus alvarezii chips packaged in 25 kg moisture-barrier multiwall kraft bags for export.

Semi-Refined Carrageenan (SRC) Powder (Food & Petfood Grade)

Precision-milled 80–120 mesh carrageenan powder with high gel strength (>600 g/cm² in 1.5% KCl) for food processing, gelling, and pet food binders.

Alkali-Treated Cottonii (ATC) Industrial Chips

Intermediate raw material processed via standardized KOH cooking, providing stable moisture (<12%) and high yield for global carrageenan refineries.

Bio-Stimulant Organic Seaweed Fertilizer Extract

Liquid organic plant fertilizer extracted from seaweed wash and cooking liquids, rich in natural phytohormones (auxins, cytokinins) for local agriculture.

Business model

The business model relies on increasing selling value and cargo density per container through B2B supply contracts for ATC chips and SRC powder with food-processing industries in Java and export buyers.

Development stages

1. Stage 1 — Use ready-to-lease buildings at KIB for sorting, removal of impurities, re-drying, and dense-bale pressing facilities (baling press).
2. Stage 2 — Install an alkaline cooking (KOH), neutralisation washing, ATC-chip cutting, and mechanical drying line to maintain stable year-round production.
3. Stage 3 — Develop an SRC/carrageenan powder milling line with a laboratory for gel-strength and moisture testing on KIB HPL land plots.

Global demand for carrageenan in processed meat, dairy, vegan food, and pet food continues to grow at 5–7% annually. Indonesia supplies over 60% of global Eucheuma cottonii, yet Eastern Indonesia exports predominantly unrefined raw dried seaweed, forfeiting 3x to 5x value addition.

Market Demand & Potential Buyers

• Carrageenan refiners and food ingredient blenders in China, Europe, the United States, and Japan
• Domestic food, sausage, dairy, and confectionery manufacturers in East Java and West Java
• Pet food canning processors across Southeast Asia seeking cost-effective gelling binders
• Local commercial horticultural and fruit farming operations purchasing organic seaweed fertilizer

Market Evidence & Context

Most seaweed from NTT is gathered by trading agents and shipped unwashed to Surabaya processors or Chinese exporters. Establishing an SRC processing plant in KIB creates decisive competitive advantages: eliminating domestic shipping freight on raw dirt/moisture, securing direct farmgate partnerships with coastal farming cooperatives, and utilizing lower regional labor costs.

Raw dried seaweed (Kappaphycus alvarezii) is collected across coastal farming communities in Kupang Regency, Semau Island, Rote Ndao, and Sabu Raijua.

Seasonality & Supply Continuity

Harvesting occurs year-round with peak dry seaweed volumes landed between April and November during sunny drying weather. Wet season drying requires mechanical rotary dryers.

Collection & shipping

Raw seaweed arrives at Bolok Harbor via inter-island wooden cargo boats and motorized catamarans, transferring directly into KIB within 5 minutes.

Procurement & handling costs

Raw dried seaweed procurement represents 60%–70% of total cash operating costs. Managing moisture verification at intake is critical to prevent paying for water weight.

• Carrageenan Quality and Kappaphycus alvarezii Seaweed at Different Harvest Ages
• Strengthen Sustainable Seaweed Farming Standards
• Road Distances from KIB Bolok to Key Port, City, and Airport Hubs

KIB offers the ideal industrial setting: legal environmental zoning for chemical washing, short drayage to Tenau export docks, and inter-island boat access at Bolok.

Estate AMDAL Envelope for On-Site Neutralization Basins

Operating inside KIB gives operators legal certainty to install on-site neutralization and settling ponds, preventing environmental friction common in residential zones. Bolok Industrial Park Profile

Direct 7.9 km Container Drayage to Tenau Export Terminal

Finished SRC packed in containerized pallets reaches Tenau Port in 15 minutes, enabling direct export documentation to international ports. Road Distances from KIB Bolok to Key Port, City, and Airport Hubs

Adjacent to Bolok Ferry & Inter-Island Boat Pier (3.6 km)

Simplifies bulk receiving of dried seaweed sacks arriving by sea from Rote Ndao, Semau, and Sabu Raijua with minimal land handling. Road Distances from KIB Bolok to Key Port, City, and Airport Hubs

A phased investment begins with an Alkali Treated Cottonii (ATC) washing, cooking, and chipping line, scaling up to fine grinding and spray drying in Phase 2.

Business process

1. Dry seaweed receiving, mechanical drum screening to remove sand/shells, and pre-washing in fresh water
2. Cooking in hot potassium hydroxide (KOH) alkaline solution (75°C–85°C) to convert carrageenan into gel form
3. Multi-stage washing and acid neutralization to remove residual alkali and restore neutral pH
4. Mechanical dewatering through continuous hydraulic presses followed by thermal rotary or solar tunnel drying
5. Precision hammermill pulverization (for powder grade), air classification, metal detection, and vacuum packaging

Initial Capacity & Production Scale

Stainless Steel Alkaline Cooking Tanks & Agitators

Grade 316 stainless steel reactors with internal steam heating coils and heavy-duty variable-speed agitators.

Energy-Efficient Thermal Drying System

Indirect biomass-fired or steam-heated rotary dryers engineered to reduce chip moisture from 70% to under 12% without thermal degradation.

On-Site Modular Effluent Neutralization Unit

Under KIB’s estate AMDAL framework, tenant installs acid dosing neutralization tanks, settling sumps, and aeration ponds to treat washwater before discharge.

Certified Food-Grade Clean Milling & Packing Cleanroom

Enclosed positive-pressure milling and bagging room equipped with HEPA filtration, magnetic separators, and automated checkweighers.

Dedicated Production Facilities (Investor Scope)

SS-316 alkaline cooking reactors, high-pressure hydraulic dewatering presses, rotary drum dryers, ultra-fine pin mills, steam boiler plant, and on-site modular effluent neutralization basins.

Transitioning from exporting raw dried seaweed to producing Semi-Refined Carrageenan (SRC) multiplies export product value by 3x to 5x while eliminating freight paid on shipping moisture and dirt.

• Carrageenan Quality and Kappaphycus alvarezii Seaweed at Different Harvest Ages
• Strengthen Sustainable Seaweed Farming Standards

Key business risks include farmgate raw seaweed price spikes, fluctuating moisture/dirt levels in raw supplies, and international carrageenan commodity price cycles.

Substantial moisture and sand adulteration in raw seaweed purchased from collectors

Implement strict intake laboratory testing (moisture meters, ash content) with price discount schedules tied to standardized dry weight.

Alkaline wash wastewater exceeding environmental discharge standards

Install automated pH-neutralization dosing with sulfuric acid and recycle treated washwater into initial pre-washing stages.

Seasonal supply shortages during rainy monsoon months when farmers cannot sun-dry seaweed

Install commercial mechanical rotary dryers at the plant and maintain 60 days of dried inventory in dry ventilated warehouses.

Data sources include Ministry of Marine Affairs (KKP) seaweed trade statistics, Kupang seaweed cultivation network research, and international carrageenan export price benchmarks.

Interested in developing this business at KIB?

Present proposed processing line capacity (tonnes/month dried input) and water/power requirements to KIB management to inspect suitable industrial plots.

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