Dewatering Results: Moisture Content Before & After for 10 Common Materials
“How dry will my material come out?” It is the first question every buyer asks — and the one most suppliers answer with vague promises. As a screw press dewatering machine manufacturer that tests customer materials in our own factory every week, we believe in numbers and videos, not adjectives.
Below are typical dewatering results from screw press trials on ten of the most common materials our customers process. Every material links to a dedicated page with an actual pressing video, so you can watch the machine work instead of taking our word for it.
How to Read the Numbers
- Inlet moisture: the water content of the material as it enters the screw press, after any pre-thickening.
- Cake moisture: the water content of the discharged solid cake after pressing.
- Volume reduction: how much smaller the waste stream becomes — the number that decides your disposal bill.
Your exact results depend on fiber content, particle size, and feed consistency. Treat this table as a realistic planning baseline, then confirm with a material test on your own stream.
Typical Screw Press Dewatering Results
| Material | Inlet Moisture | Cake Moisture | Volume Reduction |
|---|---|---|---|
| Cow manure | 80–85% | 55–60% | ≈60% |
| Food waste | 85–90% | 60–65% | ≈65% |
| Brewer’s grains | 78–82% | 55–60% | ≈55% |
| Paper pulp | 85–90% | 45–55% | ≈70% |
| Tea residue | 82–86% | 58–62% | ≈60% |
| Herb / medicine residue | 85–90% | 60–65% | ≈65% |
| Cassava residue | 85–90% | 60–65% | ≈60% |
| Coconut coir | 80–85% | 55–60% | ≈55% |
| Vegetable waste | 90–95% | 65–70% | ≈70% |
| Distiller’s grains | 75–80% | 52–58% | ≈55% |
See the Pressing Trials on Video
Two of the trials behind the numbers above — cow manure and food waste running through a CTYZ screw press:
Three Patterns Worth Knowing Before You Buy
1. Fiber is your friend. Materials with structural fiber — cow manure, bagasse, pulp — press drier because the fibers form a permeable cake that lets water escape under pressure. This is why paper pulp, with 85–90% inlet moisture, can discharge at 45–55%: it is one of the best screw press materials in existence.
2. Watery does not mean easy. Vegetable waste at 90–95% inlet moisture looks like it has the most water to remove — and it does — but soft, low-fiber cells collapse into an impermeable paste. Cake moisture stays higher (65–70%), and screen blinding becomes the real engineering challenge. Greasy kitchen waste behaves similarly.
3. The last 5% of moisture costs the most. Going from 65% to 60% cake moisture is usually a matter of back-pressure adjustment. Going from 60% to 55% may require a longer pressing zone or a second pressing stage. If your downstream process (composting, incineration, transport) has a hard moisture limit, tell your supplier the number before sizing the machine — it changes the screw design.
What This Means for Your Disposal Bill
The financial case for dewatering is almost entirely volume reduction. A truckload of food waste at 88% moisture is mostly water; pressed to 62%, the same solids fit in roughly one-third of the volume. For operations paying by the ton for disposal, transport, or drying, a screw press typically pays for itself in 12–24 months on avoided volume alone — before counting any value in the pressed cake (compost, feed, fuel).
Don’t Trust Tables — Test Your Material
Every table, including this one, is a starting point. Your material has its own fiber structure, fat content, and chemistry, and small differences move the results. The only honest answer to “how dry will my material get?” is a physical test.
We run free dewatering tests for serious buyers: ship us 20–50 kg of your material, and we return a video of the full pressing run plus a written report with inlet/outlet moisture, throughput, and power consumption. Request a free material test
Chuantai Machinery is a screw press dewatering machine manufacturer since 2011, with pressing-test videos for 70+ materials published on our applications pages. Browse all material applications