A Turkish water filter manufacturer ordered 56 tons of coconut shell activated carbon powder for their CTO (Carbon Block) cartridge production line. The carbon is used as the primary filtration media in household and commercial drinking water filter cartridges — the type you find inside under-sink purifiers, refrigerator filters, and point-of-use water dispensers.
Here's how we handled this order from specification to delivery.
CTO stands for Chlorine, Taste, and Odor — the three things these cartridges are designed to remove from tap water. Unlike loose GAC (granular activated carbon) filters where carbon granules sit loosely inside a housing, CTO cartridges are solid carbon blocks made by mixing fine carbon powder with a polyethylene (PE) binder and sintering them under heat and pressure.
The result is a dense, uniform block with no channeling, no carbon fines in your water, and significantly better chlorine removal performance than loose GAC at the same contact time.
Why carbon powder is required:
The sintering process needs particles fine enough to create a homogeneous mixture with PE powder. If the carbon is too coarse, the block has voids, weak spots, and inconsistent filtration. Standard CTO production requires 80×325 mesh carbon powder — particles between 0.044mm and 0.177mm.
This manufacturer produces approximately 3 million CTO cartridges per year for both their own brand and OEM customers across Europe and the Middle East. Their spec:
| Parameter | Client specification | What we supplied |
|---|---|---|
| Raw material | Coconut shell | Sri Lanka origin coconut shell |
| Particle size | 80×325 mesh (≥90% within range) | 93.5% within 80×325 mesh |
| Iodine number | ≥1100 mg/g | 1150 mg/g |
| Ash content | ≤3% | 2.4% |
| Moisture | ≤5% | 3% |
| pH | 6.5–8.0 | 7.2 |
| Apparent density | 0.45–0.55 g/mL | 0.48 g/mL |
| Iron content | ≤0.05% | 0.02% |
| Acid-soluble matter | ≤1% | 0.6% |
| Water extract conductivity | ≤80 μS/cm | 52 μS/cm |
| Chlorine reduction capacity | ≥12,000 gallons (per NSF 42 at 0.5 gpm) | Verified by client's in-house test |
Why these specs matter for CTO production:
Not all activated carbon is suitable for CTO cartridge production. Here's why coconut shell dominates the drinking water filter market:
| Factor | Coconut shell | Coal-based | Wood-based |
|---|---|---|---|
| Ash content | 3% | 8–12% | 3–7% |
| Taste/odor of carbon itself | Neutral | Slight smoky note possible | Possible woody note |
| Micropore ratio | Very high (>90%) | Medium (60–70%) | Low (40–50%) |
| Chlorine removal efficiency | Excellent | Good | Fair |
| NSF 42/61 certification path | Standard | Requires more washing | Possible but less common |
| Food safety profile | Excellent | Acceptable with washing | Good |
| Cost per ton | Higher | Lower | Medium |
The micropore advantage: Chlorine molecules are small. They're captured in micropores (<2nm diameter). Coconut shell carbon has the highest micropore ratio of any activated carbon type — meaning more of its internal surface area is actually useful for chlorine removal. This translates directly to longer cartridge life.
Food safety: Drinking water cartridges must pass extractables testing — hot water is passed through the carbon and the extract is analyzed for heavy metals, PAHs, and other contaminants. Low-ash coconut shell carbon passes these tests more easily than coal-based alternatives.
For context on why our specs matter, here's the basic CTO manufacturing process:
What happens if carbon quality is wrong:
This is why CTO manufacturers are the most demanding activated carbon buyers — every parameter directly affects whether the final cartridge works or gets scrapped.
Huamei Carbon factory warehouse: 1-ton jumbo bags (FIBC) of coconut shell activated carbon stacked on wooden pallets, ready for container loading and export shipment
| Item | Detail |
|---|---|
| Packing | 1-ton jumbo bags (FIBC), double PE inner liner |
| Bags per container | 28 bags per 40'HQ |
| Total containers | 2 × 40'HQ |
| Loading | Fork-loaded, secured with dunnage bags |
| Moisture protection | Double PE liner + silica gel sachets inside each jumbo bag |
| Port of loading | Xiamen |
| Port of discharge | Mersin, Turkey |
| Transit time | 22 days |
Why double PE liner for carbon powder:
Carbon powder is hygroscopic — it absorbs moisture from air. During the 22-day sea transit through the Suez Canal (high humidity), unprotected carbon can gain 3–5% moisture. Double PE liner keeps moisture gain below 0.5% during transit. This matters because excess moisture causes sintering defects in CTO production.
After running our carbon through their CTO production line (first batch = 5 tons for validation):
They've confirmed a supply agreement for 56 tons per quarter (224 tons/year).
If you're a CTO cartridge manufacturer sourcing activated carbon, here are the key specs to look for:
| Parameter | Minimum for CTO | Ideal range | Why it matters |
|---|---|---|---|
| Raw material | Coconut shell | Coconut shell | Lowest ash, best micropore ratio |
| Mesh size | 80×200 minimum | 80×325 | Proper block density and flow rate |
| Iodine number | ≥1000 mg/g | 1100–1200 mg/g | Cartridge lifespan |
| Ash | ≤5% | ≤3% | Extractables testing |
| Iron | ≤0.1% | ≤0.05% | Prevents discoloration and metallic taste |
| pH | 6–9 | 6.5–8.0 | Neutral water output |
| Moisture | ≤8% | ≤5% | Sintering quality |
| Conductivity (water extract) | ≤150 μS/cm | ≤80 μS/cm | Low ionic leaching |
| Apparent density | 0.40–0.60 g/mL | 0.45–0.55 g/mL | Consistent block weight and density |
CTO (Carbon Block) cartridges use coconut shell activated carbon powder in 80×325 mesh size. The powder is mixed with polyethylene binder and sintered into a solid block. Coconut shell is preferred because of its high micropore content (best for chlorine removal), low ash (passes food-safety extractables tests), and neutral taste profile. Coal-based carbon is rarely used in drinking water cartridges due to higher ash and potential taste issues.
80×325 mesh (0.044–0.177mm particle size) is the standard for most 10-inch CTO cartridges. Some manufacturers use 100×325 for tighter blocks with slower flow, or 50×200 for faster flow but slightly lower chlorine removal. The exact size depends on your target flow rate and pressure drop specifications.
A standard 10-inch × 2.5-inch CTO cartridge contains approximately 300–450 grams of activated carbon (60–70% of total block weight, remainder is PE binder). A 10-inch × 4.5-inch "big blue" cartridge contains approximately 1,200–1,500 grams. One ton of carbon powder produces approximately 2,200–3,300 standard cartridges.
The carbon itself doesn't carry NSF certification — the finished cartridge does. However, the carbon must be produced to a standard that allows the cartridge to pass NSF 42 (aesthetic effects — chlorine, taste, odor) and NSF 61 (health effects — extractables). Key requirements: low heavy metals, low ash, low conductivity of water extract, no PAH contamination. We supply carbon that has been validated by multiple NSF-certified cartridge manufacturers.
Typically 6–12 months or 1,000–3,000 gallons depending on inlet water quality and cartridge size. The carbon's iodine number directly determines cartridge life — higher iodine (1100+) gives 20–30% longer life compared to standard 900 iodine carbon. Our 1150 iodine number coconut shell carbon helps manufacturers deliver longer-rated cartridges as a competitive advantage.
Huamei Activated Carbon Co., Ltd.
Website: www.huameicarbon.com
In Q2 2026, we shipped 52 tons of 4mm coal-based pellet activated carbon to a petrochemical client in the Middle East. The carbon is used in fixed-bed adsorbers for VOC removal from process exhaust — specifically toluene, xylene, and mixed C5–C9 hydrocarbons at 40–60°C inlet temperature.
This is how the order went from first inquiry to delivery.
The client operates a plastics manufacturing complex with three exhaust streams requiring VOC treatment. Their existing carbon (sourced from a European distributor) was underperforming — breakthrough happening at 60% of rated bed life.
| Parameter | Client specification | What we supplied |
|---|---|---|
| Carbon type | Coal-based pellet (extruded) | 4mm coal-based pellet |
| Diameter | 4.0 mm | 4.0 mm (±0.2 mm tolerance) |
| Iodine number | ≥900 mg/g | 950 mg/g (tested) |
| CTC value | ≥60% | 65% (tested) |
| Hardness | ≥95% | 97% |
| Moisture | ≤5% | 3.2% |
| Ash content | ≤12% | 9.5% |
| Bulk density | 450–550 g/L | 480 g/L |
| Quantity | 56 tons (3 adsorbers ×
~18.5 tons each) |
56 tons |
The CTC (carbon tetrachloride activity) value was the critical spec — it measures vapor-phase adsorption capacity, which directly determines how long the bed lasts before breakthrough. Their previous supplier was delivering 55–58% CTC, which explains the early breakthrough.
Pellet (extruded) activated carbon is the standard choice for gas-phase VOC treatment because:
Granular carbon (irregular shape) creates 20–40% higher pressure drop at the same flow rate and generates more dust during handling and operation. For large gas-phase adsorbers, pellet is always the better engineering choice.
The 52-ton order took 12 days to produce. Our QC process for this shipment:
Raw material stage:
In-process checks:
Finished product testing (every 5-ton batch):
Final COA:
We issued 12 batch COAs (one per ~5 tons) plus a composite COA for the full 52 tons. Client also requested third-party SGS inspection before loading — passed without issues.
| Item | Detail |
|---|---|
| Packing | 25 kg woven PP bags, palletized |
| Bags per pallet | 40 bags (1 ton/pallet) |
| Total pallets | 52 |
| Container type | 2 × 40' HQ containers |
| Loading per container | 26 tons each |
| Moisture barrier | PE liner inside container |
| Fumigation | Methyl bromide free (client requirement) |
Pellet carbon is sensitive to moisture absorption during transit — especially to the Middle East where port humidity can be high. We line each container with PE sheeting and include silica gel desiccant packs as standard for Gulf destinations.
| Stage | Timeline |
|---|---|
| Order confirmed | Day 0 |
| Production complete | Day 12 |
| SGS inspection | Day 14 |
| Container loading | Day 15 |
| Port departure (Tianjin) | Day 18 |
| Arrival at destination port | Day 38 (20 days transit) |
| Client confirmation received | Day 42 |
Total lead time from order to delivery: 42 days. Production was the bottleneck (12 days) — transit time to the Gulf is fixed at ~20 days from North China ports.
For clients who need faster delivery: we maintain 200+ tons of 4mm pellet carbon in stock at any given time. Stock orders can ship within 3–5 days of payment, cutting total delivery to under 30 days.
Six weeks after installation, the client reported:
They've since placed a second order (same spec, 52 tons) for their scheduled bed replacement in Q4 2026. Annual consumption: ~112 tons.
The client's previous carbon was sourced through a European distributor at approximately $2,800–3,200/ton CIF. Our direct factory price delivered CIF to their port:
The cost saving on 112 tons/year is significant. And the better CTC value means longer bed life — so actual cost-per-operating-hour drops even further.
If you're running a similar VOC treatment system, here's what to specify:
| Parameter | Recommended for VOC | Why it matters |
|---|---|---|
| Type | Coal-based pellet (extruded) | Low pressure drop, survives regeneration |
| Diameter | 3 mm or 4 mm | 4mm for high-flow; 3mm for higher removal but more ΔP |
| CTC | ≥60% (higher is better) | Directly determines bed life for VOC adsorption |
| Iodine | ≥900 mg/g | General adsorption capacity indicator |
| Hardness | ≥95% | Must survive handling + regeneration cycles |
| Ash | ≤12% | High ash = less active carbon per kg |
| MOQ | 10 tons | Our minimum order for custom specs |
Coal-based pellet (extruded) activated carbon in 3mm or 4mm diameter is the industry standard for fixed-bed VOC adsorption. The key spec is CTC value (carbon tetrachloride activity) — aim for ≥60%. Higher CTC means more vapor-phase adsorption capacity and longer bed life between regeneration or replacement cycles.
It depends on gas flow rate, VOC concentration, and target outlet concentration. A typical industrial adsorber treating 10,000–30,000 m³/hr of exhaust uses 15–25 tons of carbon per vessel. Most systems have 2–3 vessels (one adsorbing, one regenerating, one on standby). Annual replacement or top-up is typically 15–25% of total bed volume.
3mm pellets have more surface area per unit volume (better removal efficiency) but create higher pressure drop. 4mm pellets have lower pressure drop (less fan energy needed) but slightly lower removal kinetics. For high-flow industrial systems (>20,000 m³/hr), 4mm is usually preferred. For smaller systems or when emission limits are very tight, 3mm may be worth the extra pressure drop.
Typically 12–18 months before replacement is needed, depending on inlet VOC concentration and whether the system includes thermal regeneration. With on-site steam or hot nitrogen regeneration, the same carbon can last 3–5 years before adsorption capacity degrades below useful levels. Without regeneration, it's a one-time use with 12–18 month life.
Yes. Our standard 4mm pellet runs CTC 60–65%. For heavy-duty applications (high VOC concentration or tight emission limits), we produce a high-CTC variant at 70–75% CTC. This requires longer activation time and yields less per batch, so price is approximately 15–20% higher. MOQ 10 tons, lead time 15–18 days.
We supply 3mm and 4mm coal-based pellet activated carbon for VOC, solvent recovery, and industrial gas treatment. MOQ 3 tons, monthly capacity 700+ tons across all grades, CIF delivery worldwide.
Huamei Activated Carbon Co., Ltd.
Website: www.huameicarbon.com
In July 2026, Huamei Carbon completed a shipment of 52 tons of coconut shell granular activated carbon to a filter cartridge manufacturer in Turkey. Unlike our gold recovery orders, this carbon is destined for a different job: it will be packed into point-of-use water filter cartridges sold across Turkey and the wider Middle East market for household and commercial drinking water treatment.
This order is a good example of why the “right” activated carbon is never a single grade — it depends entirely on what the carbon has to do.
| Parameter | Specification |
|---|---|
| Product | Coconut Shell Granular Activated Carbon |
| Quantity | 52 tons |
| Mesh Size | 8×30 mesh |
| Iodine Value | ≥1000 mg/g |
| Hardness | ≥98% |
| Ash Content | ≤3% |
| Moisture | ≤5% |
| Packaging | 25 kg woven bags with inner PE liner |
| Destination | Turkey |
| Application | Drinking water filter cartridge manufacturing |
Filter cartridge manufacturing has very different priorities from a gold CIL circuit. The client chose coconut shell carbon at 8×30 mesh for three reasons:
For a drinking water product, two things carry more weight than raw iodine value:
This is the opposite of what we optimize for on gold recovery orders, where hardness and gold-loading capacity lead. Same factory, same coconut shell raw material — different grade tuned for the application.
All 52 tons were packed in 25 kg polypropylene woven bags with an inner PE liner for moisture protection, then palletized and loaded into standard containers. The 25 kg bag format is convenient for cartridge production lines, where carbon is dosed by the bag into filling hoppers.
The shipment was loaded at port and sent via sea freight to Turkey, with a full batch certificate of analysis accompanying the order.
As a direct manufacturer with over 20 years of experience, Huamei Carbon supplies coconut shell activated carbon tuned for drinking water and filter cartridge use:
Whether you need a trial quantity to qualify a new cartridge or bulk volumes for full production, we provide:
Contact us today:
Related reading: Coconut Shell Activated Carbon for Water Treatment
When your activated carbon supplier mixes apricot shell into your coconut shell carbon, you don't just lose money. You lose gold. And you lose trust in an entire supply chain.
This is the story of our South African client — a gold mining operation running CIL circuits — who got burned by a dishonest Chinese supplier and how we earned their business with verified, pure coconut shell carbon.
Our client operates a gold recovery plant in South Africa using CIL (Carbon-in-Leach) circuits. They'd been buying 6×12 mesh coconut shell activated carbon from another Chinese manufacturer for over a year.
Then performance started declining.
They sent samples to an independent lab. The results:
The cost of being cheated:
Apricot shell carbon is cheaper than coconut shell. It looks similar in granular form. But it has lower density, lower hardness, and breaks down faster under the mechanical stress of a CIL/CIP circuit. The previous supplier was blending it in to increase profit margins — betting the client wouldn't test it. They were wrong.
After confirming the contamination, our client needed a new supplier they could verify. A business contact who'd been buying from us for 3+ years made the introduction.
Their requirements were non-negotiable:
They also requested:
We agreed to everything. When your product is genuine, transparency is free.
| Parameter | Client Requirement | Our Delivery |
|---|---|---|
| Raw material | 100% coconut shell | 100% coconut shell (verified) |
| Mesh size | 6×12 | 6×12 |
| Iodine number | ≥1100 mg/g | 1120–1150 mg/g |
| Hardness | ≥98% | 98.5–99% |
| Ash content | ≤3% | 2.2–2.6% |
| Moisture | ≤5% | 4.8% |
Every batch tested in our lab + third-party verification on the first shipment.
66 tons loaded in containers at port, destination South Africa.
Results after switching to our carbon:
The relationship started because we delivered exactly what we promised. It continues because every batch matches the first.
If you're buying coconut shell activated carbon, here's how to protect yourself from contamination:
| Test | Coconut Shell (genuine) | Apricot Shell (contaminant) |
|---|---|---|
| Hardness (ball-pan) | 98–99% | 85–93% |
| Apparent density | 0.48–0.55 g/mL | 0.40–0.45 g/mL |
| Ash content | 2–3% | 3–6% |
| Visual inspection | Dark black, uniform granules, dense | Slightly lighter, more irregular shapes |
| Water float test | Very few floaters | More particles float (lower density) |
Key indicators of blending:
| Spec | Detail |
|---|---|
| Product | Coconut Shell Activated Carbon for Gold Recovery |
| Mesh size | 6×12 |
| Iodine number | 1100+ mg/g |
| Hardness | ≥98% |
| Ash content | ≤3% |
| Activation method | Steam activated |
| Raw material source | Indonesia, Philippines, Sri Lanka |
| Production capacity | 700+ tons/month |
| MOQ | 10 tons |
The fastest check is hardness testing. Pure coconut shell activated carbon delivers 97–99% hardness (ball-pan method). If results come back 90–93%, contamination is likely. Density measurement is the second indicator — apricot shell is lighter (0.40–0.45 g/mL vs 0.48–0.55 for coconut). For definitive confirmation, send samples to an independent lab for raw material identification.
Cost. Apricot shell raw material is $300–500/ton cheaper than quality coconut shell. Mixing 25–35% into each batch increases profit margin significantly per ton. The visual similarity makes it hard to detect without testing. Suppliers who do this are betting you won't test — or won't test often enough.
Poorly compared to coconut shell. Lower hardness means more breakage in CIL/CIP circuits, which means gold losses to fine carbon that can't be recovered. Lower density means less gold adsorption per unit volume. It's functional for less demanding applications, but it's not suitable for gold recovery where mechanical strength is critical.
Coconut shell has higher fixed carbon content (73–76%), producing activated carbon with superior hardness (97–99%) and density. Apricot shell has lower fixed carbon (~60–65%), resulting in softer carbon (85–93% hardness) that breaks down faster under mechanical stress. For gold CIL/CIP, coconut shell is the industry standard because circuit conditions demand high abrasion resistance.
If your current carbon isn't performing — or you suspect contamination — talk to us. We ship pure coconut shell carbon, verified by third-party testing, to gold mining operations across Africa, South America, and Central Asia.
Huamei Activated Carbon Co., Ltd.
Website: www.huameicarbon.com
When your activated carbon supplier mixes palm shell into your coconut shell carbon, you don't just lose money — you lose gold. Literally.
This is the story of one of our clients in Burkina Faso, how they got burned by a dishonest supplier, and how we earned their trust with 112 tons on the first order.
Our client operates a gold recovery plant in Burkina Faso using CIL circuits. They'd been buying 6×12 mesh coconut shell activated carbon from another Chinese supplier for about a year. Production numbers looked fine at first.
Then recovery rates started dropping.
They sent samples to an independent lab. The results:
The cost of being cheated:
Palm shell carbon looks similar to coconut shell carbon visually. The supplier was betting they'd never test it. They were wrong — just too late.
After the fraud was confirmed, our client asked around. A business contact who'd been buying from us for 3+ years made the introduction.
Their requirements were specific:
They were cautious. Understandably. They requested:
We agreed to everything. If your product is real, transparency costs nothing.
| Parameter | Client Requirement | Our Delivery |
| Raw material | 100% coconut shell | 100% coconut shell (verified) |
| Mesh size | 6×12 | 6×12 |
| Iodine number | ≥1100 mg/g | 1120–1150 mg/g |
| Hardness | ≥98% | 98.5–99% |
| Ash content | ≤3% | 2.1–2.5% |
| Moisture | ≤10% | 6.5% |
Every batch tested by our lab + SGS verification on first shipment.
June alone, we shipped 600 tons of gold-grade coconut shell activated carbon across multiple clients. This Burkina Faso client took 112 tons — 4 × 40HQ containers loaded at Nansha Port (南沙港).
Yesterday's shipment: 4 × 40HQ loaded and on the water, destination Burkina Faso.
The relationship started because:
If you're buying coconut shell activated carbon for gold recovery, here's how to protect yourself:
| Spec | Detail |
| Product | Coconut Shell Activated Carbon for Gold Recovery |
| Mesh size | 6×12 |
| Hardness | 98%+ |
| Iodine number | 1100+ mg/g |
| Activation | Steam activated |
| Loading port | Nansha Port, Guangzhou / Xiamen Port |
| Production capacity | 700+ tons/month |
| MOQ | 10 tons |
| Packaging | 25kg PP bags or 500kg jumbo bags |
Lab testing is most reliable (hardness, ash content, density). Visual inspection: coconut shell carbon is darker, denser, and has a more uniform granule shape. Palm shell tends to be lighter in color with more irregular shapes. A simple water float test also helps — palm shell carbon has lower density and more pieces float.
Money. Palm shell is $500–800/ton cheaper than coconut shell as raw material. Mixing 30–40% palm shell into a batch increases profit margin by $200–300/ton. Multiply that by hundreds of tons and the incentive is clear.
Poorly. Lower hardness means more breakage in CIL/CIP circuits (= gold losses to fine carbon). Lower gold adsorption value means less gold loaded per kg of carbon. It's not worthless, but it's not what you're paying for when you order coconut shell grade.
Standard specs: 7–15 days. Custom specifications (special mesh size, impregnation, acid washing): 15–25 days. These timelines assume raw material is in stock — confirm with your supplier before finalizing delivery schedules.
If your current carbon isn't performing — or you just want to verify what you're actually getting — talk to us. We ship what we promise. 600 tons this month proves it.
In June 2026, Huamei Carbon successfully completed a large-scale shipment of 140 tons of coconut shell activated carbon to a gold mining operation in Egypt. This order highlights the growing demand for high-performance adsorption materials in Africa's expanding gold recovery sector.
| Parameter | Specification |
|---|---|
| Product | Coconut Shell Activated Carbon for Gold Recovery |
| Quantity | 140 tons |
| Mesh Size | 6x12 mesh |
| Iodine Value | ≥1100 mg/g |
| Packaging | 25 kg woven bags |
| Destination | Egypt |
| Application | Gold recovery (CIL/CIP process) |
The client's gold processing plant uses a Carbon-in-Leach (CIL) circuit — one of the most common gold extraction methods in North Africa. For CIL operations, the carbon must meet three critical requirements:
All 140 tons were packed in 25 kg polypropylene woven bags, palletized and stretch-wrapped for container loading. This packaging format is preferred by mining operations because:
The shipment was loaded into multiple 20ft containers and shipped via sea freight to Alexandria port, Egypt.
As a direct manufacturer with over 20 years of experience, Huamei Carbon supplies coconut shell activated carbon specifically optimized for gold recovery applications. Our gold-grade carbon features:
Whether you need 1 ton for testing or 500+ tons for full production, we provide:
Contact us today:
Related reading: How to Select Activated Carbon for Gold Recovery
