Pet Product Cat Litter Factory in Vietnam

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First Visit to the Site

We flew to Ho Chi Minh City in early March 2024. The client had sent me photos of their building, but photos never tell the whole story. The building was in Bình Dương province, about an hour north of HCMC. Industrial area. Lots of other small factories around—furniture, packaging, some food processing.

The building itself was a single-story steel structure. 2,000 square meters total. That’s about 21,500 square feet. The client was leasing it from a local landlord. The building had been used for garment manufacturing before—concrete floor, decent lighting, but only 5 meters to the ceiling beams.

They wanted to install a 5t/h pet product cat litter factory in this space. We walked through the building with a tape measure and a notepad. Our first thought: This is going to be tight.

But not impossible.

The client was a Vietnamese entrepreneur who had been importing cat litter from China for three years. He had a distribution network across southern Vietnam—pet stores, online shops, even some supermarkets. He knew the market. He just didn’t want to keep paying shipping costs from China.

His calculation was simple. Imported tofu cat litter cost him about $0.90 per kg landed in Vietnam. He sold it for $1.50 per kg. If he could make it locally for $0.50 per kg, his margin would nearly triple. Even after paying for the equipment and factory lease, he’d be ahead within two years.

We sat down in his small office. He had a notebook with handwritten numbers. Raw material prices. Electricity rates. Labor costs. He had done his homework.

“Can you really fit 5 tons per hour in this building?” he asked.

We said yes. But we also told him honestly—we’d have to run a single production line, not multiple lines. And we’d need to put some equipment outside under a canopy (the dryer and the cooler, specifically). He was fine with that.

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Why Vietnam Makes Sense for Cat Litter Production

Vietnam is actually a good location for this kind of manufacturing. Three reasons.

First, raw materials. Vietnam grows about 1.5 million tons of soybeans annually. That means okara (soybean residue) is available from tofu factories in and around HCMC. The client already had a deal with a tofu factory in District 12—they would deliver 2 tons of wet okara every morning. Cheap. Consistent.

Second, labor. Wages in Bình Dương are around $250–300 per month for factory workers. That’s higher than Cambodia but lower than Thailand or China. The client planned to run a single 10-hour day shift with 15 people. That’s manageable.

Third, the domestic market. Vietnam has an estimated 5 million pet cats. That’s a lot. And Vietnamese cat owners are increasingly buying premium products—including imported cat litter. Local production at a lower price point could capture a big share of that market.

The client’s target was to sell 80% of his production domestically and export 20% to Cambodia and Laos. He already had contacts across the border.

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What They Wanted to Produce

The client wanted a single product line: tofu-based (soybean residue) cat litter. Unscented, clumping, flushable. The kind that’s popular with urban cat owners who live in apartments.

The premium line came later. During our discussion, the client mentioned that some customers complained about dust in the standard product. We adjusted the formula—more corn starch, less okara fiber—and added a second screening step. That reduced dust by about 60%.

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Raw Materials – Local Sourcing in Southern Vietnam

The client’s raw material strategy was simple: source everything within 100 kilometers of the factory.

• Okara (soybean residue): From a tofu factory in HCMC’s District 12. Fresh okara arrives every morning at 7 AM. The client has a dedicated truck. Okara moisture is about 65–70% when it arrives. That’s fine—the dryer handles it.
• Corn starch: From a processor in Đồng Nai province. Vietnam grows a lot of corn (about 5 million tons annually). Corn starch is cheap and available.
• Guar gum: Imported from India. The client buys it through a trading company in HCMC. It’s the only imported raw material.
• Color additives: For the premium line (light green color). Sourced locally from a food ingredient supplier.

Here’s the full breakdown:

The client also keeps a small stock of finished goods—about 50 tons—in the warehouse area. That’s enough to cover two weeks of sales.

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Equipment – What We Supplied for This Pet Product Cat Litter Factory

The client’s budget was $100,000 for cat litter making machines. We came in at $95,000. Here’s what we sent:

What makes this project so special is that the client chose an extruder instead of the more commonly used cat litter pellet machine. The extruder was the most expensive single piece—about $28,000. It’s a single-screw design, which is simpler than twin-screw. For tofu cat litter, single-screw works fine because the material isn’t sticky or oily.

The dryer is electric. The client wanted electric because he didn’t want to deal with biomass fuel storage and ash disposal. Higher electricity cost, but simpler operation. His electricity rate in Bình Dương is about $0.08 per kWh. The dryer pulls 45 kW. That’s $3.60 per hour. He’s fine with that.

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The Building Layout – Making 5 t/h Fit in 2,000 m²

This was the tricky part. The building was only 5 meters tall. A normal 5 t/h line would have vertical bins and gravity flow. We couldn’t do that.

So we designed a ground-level layout with conveyors.

Zone 1 – Raw material storage (300 m²)
Back left corner. Okara in plastic totes (each tote holds 500 kg). Corn starch stacked on pallets. The client keeps about 150 tons of corn starch on hand—that’s about 20 days of production.

Zone 2 – Mixing area (200 m²)
The ribbon mixer sits on a 1.5-meter steel platform. The feed hopper and buffer bin are at ground level. A bucket elevator lifts the mixed material to the extruder.

Zone 3 – Extrusion (150 m²)
The extruder is on a concrete pad. The operator station is next to it. The extruder die plate is easy to access—the client changes it once per week (takes about 20 minutes).

Zone 4 – Drying (400 m², partly outside)
The rotary drum dryer is too long (12 meters) to fit entirely inside the building. The drum sits half inside, half outside. The building wall has a cutout. The client built a simple steel canopy over the outdoor section. This works fine—the dryer is insulated, so rain and sun don’t affect it.

Zone 5 – Cooling and screening (250 m²)
The counterflow cooler and screener are inside, near the dryer discharge. The cooler is tall (3.5 meters) but narrow. It fits under the ceiling beams.

Zone 6 – Packaging and finished goods (500 m²)
Three bagging lines at the front of the building. Finished goods pallets stacked nearby. The client ships about 10 tons per day, so finished goods don’t sit for long.

Zone 7 – Office and staff area (200 m²)
A small partition at the front. One room for the owner, one for sales staff, one for breaks. Basic but functional.

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Process Flow – How This 5t/h Pet Product Cat Litter Factory Actually Runs

Here’s the step-by-step. I watched this line run for three days during commissioning.

Step 1 – Raw material intake
The morning truck arrives with wet okara. Two workers unload the totes using a hand pallet jack. Corn starch bags are stacked near the feed hopper. The operator opens bags and dumps corn starch into the hopper. The pulse filter captures dust—the client estimates about 2 kg of dust per day, which goes back into the mixer.

Step 2 – Mixing
The hopper feeds corn starch into the ribbon mixer. The operator adds okara manually—shoveling it from the totes into the mixer. Not automated, but it works. Mixing time: 8 minutes. The mix should feel like wet dough—not too sticky, not too dry. Water is added through a spray bar. Total water per batch: about 100 liters.

Problem we saw: The operator added water by feel. Sometimes too much. The extruder would then produce soft pellets that collapsed. We installed a water meter with a solenoid valve. Now the operator sets the target water amount (80–100 liters per batch) and the system adds it automatically.

Step 3 – Extrusion
The mixed material drops into the extruder hopper. The single screw pushes it through a die plate with 3.5 mm holes. The extruder runs at 120 RPM. The client uses a die plate with 200 holes. Output: about 5 tons per hour when running smoothly.

The extruder doesn’t heat the material. Tofu cat litter uses cold extrusion—the friction from the screw generates a little heat (maybe 30–35°C), but that’s fine. The material comes out as long strands, which break into 3–5 cm pieces as they fall onto the conveyor.

Step 4 – Drying
The wet pellets (still 40–45% moisture) enter the rotary drum dryer. The drum is heated by electric elements—8 heaters, each 5 kW. Total heating power: 40 kW. Air temperature inside the drum: 110–120°C. Retention time: about 25 minutes.

Target exit moisture: 8–10%. The client checks moisture every hour using a handheld meter. If it’s above 10%, they slow the drum speed (longer retention). If below 8%, they speed it up.

What we learned: The client initially tried to dry at 140°C. The outside of the pellets dried too fast, creating a hard shell. The inside stayed wet. After cooling, the pellets cracked. We lowered the temperature to 110°C and extended the retention time. No more cracking.

Step 5 – Cooling
Hot pellets (75–80°C) drop into the counterflow cooler. A fan pulls ambient air upward through the pellet bed. Cooling time: about 12 minutes. Exit temperature: 30–32°C.

The cooler also removes surface moisture. The client measured moisture after cooling—it drops from 8–10% to 6–8%. That’s perfect.

Step 6 – Screening
Cooled pellets go to the horizontal reciprocating screener. Two decks:

• Top deck (5 mm): Catches oversize pellets (pellets stuck together). These go back to the grinder.
• Middle deck (2 mm): Catches correct-size pellets (2–5 mm). These go to packaging.
• Bottom deck (1 mm): Catches fines (dust and small bits). These go back to the mixer.

The client runs the premium line (2–4 mm) by changing the middle deck screen. Takes 10 minutes.

Step 7 – Packaging
Three bagging scales run simultaneously. The client uses 5 kg and 10 kg bags—both with a zipper seal. Each bagging line can do about 10 bags per minute. That’s 30 bags per minute total, or 1,800 bags per hour. At 5 kg per bag, that’s 9 tons per hour—more than enough for their 5 t/h production.

Step 8 – Re-grinding rejects
Oversize pellets from the screener go into a small grinder. The grinder breaks them back into powder. That powder goes back to the mixer. Nothing is wasted—except the dust collected by the filters, which also goes back into the mixer.

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Utilities – What the Line Actually Consumes

The client tracked usage for the first full month of production (July 2024):

No wastewater discharge. The mixing water is absorbed by the product. Staff wastewater goes to a septic tank (the building had one). The client has a contract with a local company to pump out the septic tank twice per year. Cost: $50 per pump.

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Environmental Controls – Basic but Effective

Vietnam’s environmental regulations are less strict than Europe’s, but the client still wanted to avoid dust complaints. The factory is in an industrial zone, but there are houses about 300 meters away.

We installed:

• Pulse bag filters at the feed hopper, mixer, screener, and bagging lines. Seven filters total. Each filter has a timer that pulses compressed air to clean the bags automatically.
• Cyclone separator on the dryer exhaust. Captures larger particles before the air goes outside.
• Enclosed conveyors on all material transfer points. Reduces dust at the source.

The client’s local environmental officer tested the exhaust. Particulate concentration was 35 mg/m³—well below Vietnam’s limit of 100 mg/m³ for industrial sources.

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What Went Wrong – Real Problems from the First Two Months

I’m not going to pretend everything was perfect. Here’s what actually happened.

Problem 1 – The extruder screw snapped after 80 hours
The client ran the extruder with okara that had been stored for three days. The okara had fermented slightly—the pH dropped to 4.5. The acidic material corroded the screw at the weld point. We shipped a new screw (316L stainless, acid-resistant) via DHL. Cost: $450. Downtime: 4 days.

Problem 2 – The dryer overheated and tripped the breaker
The client’s electrician had wired the dryer incorrectly. The heater elements were drawing too much current. The main breaker tripped every 2–3 hours. We sent a wiring diagram and a video. The electrician fixed it in one day. No cost, just time.

Problem 3 – The bagging scales drifted out of calibration
After two weeks, the bagging scales were underfilling by 50–100 grams per bag. The client didn’t realize until a customer complained. We showed them how to recalibrate using a 5 kg test weight. Takes 5 minutes per scale. Now they calibrate every Monday morning.

Problem 4 – Dust buildup in the cooler
The counterflow cooler had a dead zone near the discharge. Dust accumulated and started to smolder (not a flame, but hot dust). The client noticed the smell. We added an access door so they can clean it weekly. Now they vacuum the dead zone every Friday.

These are the kinds of problems you don’t see in a brochure. But they’re fixable. And the client learned from each one.

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Staff Training – What We Actually Taught Them

We spent 10 days on-site after installation. Two engineers. We trained:

• Operator 1 (mixing): How to check okara moisture (simple oven method). How to adjust water addition for different okara batches (wet season okara needs less water).
• Operator 2 (extrusion): How to change the die plate. How to spot uneven extrusion (indicates screw wear or wrong moisture).
• Operator 3 (dryer): How to set temperature for different ambient conditions. How to clean the drum (weekly task).
• Operator 4 (screening): How to change screens for different pellet sizes. How to check for screen tears.
• Maintenance person: How to replace bag filters (every 3 months). How to lubricate bearings (monthly). How to calibrate bagging scales.

The client’s production manager told me: “Before your training, we didn’t even know the dryer had a cleanout door.” That’s exactly why we do hands-on training.

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Project Investment – What the Client Actually Paid (USD)

The client financed this with his own savings ($150,000) plus a loan from a Vietnamese bank ($160,000 at 10% interest over 3 years). His break-even point: 8,000 tons sold. At his current rate (about 12 tons per day), that’s 667 days. So roughly 22 months to break even.

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What We Would Do Differently Next Time

After six months of operation, here’s what I’d change:

• Spec a stainless steel screw from the start. The standard carbon steel screw lasted only 80 hours with acidic okara. The 316L screw is still running after 1,200 hours.
• Add a pre-dryer for okara. Wet okara (65% moisture) requires a lot of energy to dry. If the client could pre-dry it to 40% using solar drying (Vietnam has plenty of sun), his electricity bill would drop by 30%.
• Install a metal detector before the grinder. The client had a small bolt fall into the grinder. Damaged the blades. A $400 metal detector would have caught it.
• Better dust collection at the bagging area. The three bagging lines create dust. The client added a small exhaust fan and duct. That helped, but a dedicated bag filter would be better.

Overall, though, the cat litter production line is running well. The client is producing 12–14 tons per day (about 80% of capacity). He’s already signed supply agreements with two supermarket chains in HCMC and one in Hanoi.

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Why a 5t/h Pet Product Cat Litter Factory Makes Sense in Vietnam

Vietnam is a good market for this kind of manufacturing. Here’s why.

First, raw materials are cheap and available. Okara is a waste product from tofu production. Tofu factories in HCMC produce about 20 tons of okara per day. Most of it goes to pig farms as cheap feed. The client pays $50 per ton for wet okara. That’s almost nothing.

Second, labor is affordable. The client pays his 15 workers about $250 per month each. That’s $45,000 per year in labor costs. For a factory producing $3 million worth of cat litter annually (at wholesale prices), labor is only 1.5% of revenue.

Third, the domestic market is growing. Vietnam’s pet industry grew 15% in 2023. Cat litter specifically grew 20%. And Vietnamese cat owners are switching from clay litter (dusty, heavy, not flushable) to plant-based litter. The client’s research showed that 35% of cat owners in HCMC would switch to a local brand if it was 20% cheaper than imported brands.

Fourth, export potential. Vietnam has free trade agreements with the EU, Japan, South Korea, and ASEAN countries. The client can export to these markets with zero or low tariffs. He’s already talking to a distributor in Cambodia about a trial shipment.

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Thinking About Your Own Project?

Maybe you’re reading this because you’re in a similar position. You have a building. You have a market. You want to start your own cat litter production.

Here’s what I’d tell you.

Start with a realistic capacity. 5 tons per hour is a good size for a small factory. It fits in a 2,000 m² building. It doesn’t require a huge crew (15 people is enough). And the equipment cost is manageable—under $100,000 for a basic line like this one.

But don’t cut corners on the important stuff: drying, dust collection, and training. Those are the things that separate a line that works from a line that collects dust.

We’ve built over 50 cat litter lines in Southeast Asia in the last four years. Tofu, bentonite, wood, corn starch—we’ve seen all the formulas. Vietnam is not new to us. We have a service partner in HCMC who stocks common spare parts (screws, dies, bearings, filters, belts).

So if you’re planning a cat litter project—or any small-scale extrusion line—get in touch. Tell us your raw material, your target output, and your building size. We’ll send you a proposal and a layout sketch.