How to Use a 9YDB-60 Silage Bagging Machine for Distillers Grains and Tofu Residue

Quick answer: A 60-type silage bagging machine can pack distillers grains and tofu residue into sealed anaerobic bales that ferment for 14-30 days and stay stable for 6-12 months. The two keys are:

1. Pre-mix the wet byproduct with 20-30% dry adsorbent (corn stalk, wheat straw, or rice hull) to bring moisture down to 55-65%.
2. Wrap with at least 4-6 layers of 25μm stretch film with no air pockets.

The 60-type machine produces 50-75 bales per hour at 60cm diameter, 60- 80 kg per bale.

Distillers grains and tofu residue are two of the largest underused feed resources in Asia. China”s baijiu distilleries produce over 50 million tons of wet distillers grains per year. Soybean processors in China, Japan, Korea, and Indonesia generate another 12 million tons of tofu residue. Both spoil within 48-72 hours when left open to air. Both used to require either expensive mechanical drying at USD 30-50 per ton or sealed concrete silos costing tens of thousands of dollars to build.

The 60-type silage baler-wrapper—originally designed for corn silage—offers a third path. The same anaerobic fermentation principle that preserves grass silage works on these wet byproducts. The bale is the silo. The stretch film is the airtight wall. Lactic acid bacteria do the rest.

Why the 60-Type Baler-Wrapper Works for Wet Byproducts

Taizy 9YDB-60 silage bagging machine has three design features that map directly onto the challenges of wet byproduct baling.

• 50-75 bales per hour throughput. Wet byproducts spoil fast. A machine that produces a finished bale every 48-60 seconds lets the operator stay ahead of acid development. Slower machines force the operator to handle partially-spoiled material at the wrapper.
• Wider and thicker baling belt. The 60-type baling and wrapping machine uses a heavier belt than entry-level balers, which compacts loose wet material into a dense, stable bale. Without that compaction, bales made from wet byproducts slump within hours and lose the airtight seal at the film.
• Transparent film bale. The use of transparent film allows raw materials to be perfectly packaged, no matter how fragmented they are.

Parameter	Specificatie
Model	9YDB-60
Baling efficiency	50-75 bales/hour
Bale diameter	60 cm
Bale weight (silage baseline)	60-80 kg
Power options	Electric motor, diesel engine, or tractor PTO
Wikkelfolie	25μm stretch film, 4-6 layers standard

Pre-Baling: Reduce Moisture and Mix Adsorbent

Both distillers grains and tofu residue come out of the process at moisture levels that are too high for direct baling. A bale of fresh distillers grains (70% moisture) collapses under its own weight within a day. A bale of fresh tofu residue (80% moisture) leaks water from the wrap. The first hour of the operation is moisture management.

Distillers grains pre-treatment

Fresh distillers grains from a baijiu, beer, or rice wine distillery run 65-75% moisture and have a strong fermented grain smell. They are acidic (pH 3.5-4.0) and already contain lactic acid bacteria, so the fermentation that follows baling is a continuation, not a start.

Mix 100 kg of fresh distillers grains with 25-30 kg of dry corn stalk, wheat straw, or rice hull chopped to 2-5 cm length. The mix drops to 55-60% moisture—right in the target window for the 60-type silage bagging machine.

The dry adsorbent also raises the sugar content of the mix, which speeds lactic acid fermentation in the first 72 hours.

Tofu residue pre-treatment

Fresh tofu residue is the harder material. At 75-85% moisture, it is more like wet paste than grain. Two preparation steps are needed.

First, press the residue in a screw press or cheesecloth sack to bring moisture down to 65-70%.

Second, mix 100 kg of the pressed residue with 30-40 kg of dry corn stalk, wheat bran, or rice hull. The final mix should be 55-65% moisture and hold together when squeezed in a fist without dripping water.

Tofu residue has lower natural lactic bacteria counts than distillers grains, so adding 0.5-1 kg of molasses per 100 kg of mix helps the fermentation start faster.

Step-by-Step Baling and Wrapping Procedure

Once the mix is at the right moisture, the 60-type silage bagging machine handles the rest in six steps.

1. Position the machine. Place the 60-type baler at the edge of the byproduct pile on level ground. The bale exit chute should face the wrapper, with 4-5 meters of clearance for the wrapped bale to drop without damage.
2. Start the machine. Press the button. Allow 30 seconds for the belt tension to stabilize before feeding material.
3. Feed material continuously. The operator feeds pre-mixed material into the belt. The machine automatically detects whether there is sufficient fodder.
4. Auto-tie with net. When the bale reaches the target size, the auto-tie system wraps the bale with netting. The machine cuts the net, the rear door opens, and the bale comes to the wrapper.
5. Wrap round bale. For a 4-6 layer wrap, the ring rotates the bale through 12-18 full rotations (each layer = 3 rotations at 50% overlap). At 25μm film thickness, 4 layers gives 100μm total barrier—the minimum for 6-month storage. 6 layers gives 150μm, the standard for 12-month storage.
6. Seal the end. The last 1-2 rotations need an extra overlap so the film end sticks to itself. A loose film end peels back over time and lets air in. Pinch the end firmly against the bale after the ring stops.

Fermentation Timeline and Storage

The bale is a sealed anaerobic environment from the moment the last film layer is applied. Lactic acid bacteria already on the byproduct surface start fermenting sugars into lactic acid. The pH drops, oxygen stays out, and the bale stabilizes.

• Distillers grains bales: stabilize in 21-30 days. The high initial lactic acid count speeds fermentation. By day 7, the bale is warm to the touch (38-42°C) from bacterial activity. By day 21, the pH has dropped below 4.2 and the bale is shelf-stable.
• Tofu residue bales: stabilize in 14-21 days. The added molasses speeds the start. By day 10, the bale smells faintly of soy sauce. By day 14, the texture is firm and the color is light yellow-brown.

Store bales on flat, well-drained ground away from direct sunlight. Stack no more than 3 bales high. Direct sunlight heats the film and shortens its barrier life. Stacking higher than 3 deforms the bottom bales and creates air gaps at the wrap.

Quality Check: Did the Bale Ferment Right?

Indicator	Distillers Grains Bale (Good)	Tofu Residue Bale (Good)	Warning Signs
Color	Yellow-brown, uniform	Light yellow to beige, uniform	Dark brown, black, or white mold spots
Smell	Mild fermented grain, slight alcohol note	Faint soy sauce, mild sour	Rotten, ammonia, or putrid
Texture	Firm, holds shape when cut	Compact, slightly crumbly	Slimy, mushy, or dry and dusty
pH (test strip)	3.8-4.2	3.9-4.3	Above 4.5 or below 3.5
Film condition	Tight, no punctures, no condensation pools	Same	Pinholes, loose film, water between film layers

Feed value after fermentation is similar to dried forms for distillers grains, and better than dried for tofu residue. Lactic acid fermentation breaks down anti-nutritional factors in soy (trypsin inhibitor) and improves protein digestibility. Most cattle and dairy operations report a 5-10% intake increase on fermented tofu residue over dried meal, because the soft texture and palatability are higher.

5 Common Mistakes (and How to Avoid Them)

• Baling at original moisture. Fresh distillers grains (70%) and tofu residue (80%) are too wet. The bale collapses, water leaks from the wrap, and the film seal fails. Always pre-mix with 20-30% dry adsorbent before baling.
• Skipping the pre-mix entirely. Some operators try to bale wet byproduct alone and rely on the 60-type machine’s compaction to handle the moisture. The result is a bale that looks OK on day 1 and sours by day 7. The pre-mix is the single most important step.
• Using only 2-3 layers of film. The 60-type silage bagging machine can run 12 rotations per bale, but the operator sometimes stops early to save film. Below 4 layers, the barrier fails within 60-90 days and mold takes hold. 4-6 layers is the standard; 6 layers for 12-month storage.
• Not sealing the end of the film run. A loose film end is the most common point of air entry. The last rotation needs an extra overlap to glue the end to the previous layer. Check every bale before storage.
• Stacking bales in direct sunlight. UV breaks down polyethylene film. Direct sun exposure on a stored bale cuts barrier life in half. Use a shade net, a shed roof, or stack bales in the shade of a building.

Get a Configuration Quote

Tell us your byproduct type (distillers grains, tofu residue, or both), daily volume, current moisture content, and target bale size. We will confirm the right 60-type silage bagging machine configuration (motor, diesel, or PTO), recommended film specs, and provide FOB or CIF pricing to your destination port.