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Paper Pulp Dewatering Machine
08/20/2024Delivery of 12 Slope Screen Separator to South Korea
08/09/2024Paper Pulp Dewatering Machine
08/20/2024Spent grains are the main by-products generated in breweries and distilleries. With an initial moisture content of 80–85%, untreated spent grains are heavy, unstable, and expensive to transport or dispose of. A screw press dewatering machine is a reliable and widely used solution for dewatering spent grains. After dewatering, the moisture content can be reduced to 55–60%, making spent grains easier to handle, store, reuse, or further process.
At Furui Machinery, we manufacture industrial screw press dewatering machines specifically designed for brewery spent grains, distillery mash, and similar biomass materials, such as sawdust, grass, waste fruits and vegetables, with capacities ranging from 0.2 to 40 tons per hour.
Types of Spent Grains
1. Spent Grains of White Wine
- Characteristics: High in fiber, firm texture, and tightly bound moisture.
- Dewatering Tips: Requires strong pressing force, but care must be taken to avoid excessive crushing of fibers, which could affect its quality as animal feed.
2. Brewery Spent Grains
- Characteristics: High protein content and loose and fine particles, which can easily clog screens.
- Dewatering Tips: Control the feed rate to prevent excessive local pressure and clean the screen regularly.
3. Rice Wine Lees
- Characteristics: Sticky, with high sugar content and evenly distributed moisture.
- Dewatering Tips: Adjust pressure gradually and use anti-stick screens to prevent clogging and sticking.
Tips: You can send us photos, videos, or physical samples of your spent grains. Our engineers will recommend the most suitable screw press model and configuration, and trial testing is available.
Advantages of Dewatering Spent Grains
Using a screw press for dewatering spent grains offers several advantages:
1. Moisture Reduction
Spent grain usually contains 80-85% moisture. After dewatering, moisture can be reduced to about 55–60%. This process can reduce the volume and weight of waste, lowering the cost and effort needed for further processing.
2. Improved By-Product Value
- Animal Feed: Dewatered spent grains are rich in protein and fiber, making them an excellent livestock feed. The dewatering process reduces moisture content, making the grains easier to transport and store. In addition, reducing moisture content increases the shelf life of the feed.
- Composting: Dewatered spent grains can be composted and used as fertilizer. It is also used as a substrate for growing mushrooms.
- Biogas Production: Dewatered spent grains can be used in anaerobic digesters to produce biogas.
- Dewatered spent grains can be used as a growth medium for growing mushrooms.
3. Cost-Effectiveness
Investing in a screw press dewatering machine results in significant cost savings for breweries. Breweries can lower their transportation and disposal costs by reducing the moisture content of spent grains. Moreover, the reduced waste volume also saves on storage space and handling expenses.
4. Environmental Sustainability
Using brewery dewatering equipment contributes to environmental sustainability. By effectively extracting water from the spent grains, the liquid and solid can be processed separately. Besides, the dewatered solids will lower energy consumption in further processing (such as drying), leading to lower environmental impact.
Brewery & Distillery Dewatering Equipment
Below are the parameters of the brewer's grains dewatering equipment from Furui Machinery. Model selection is always based on your actual spent grain type and production capacity. Welcome to contact us for help!
| Model | FR-0.5-180 | FR-260 | FR-350 | FR-420 | FR-500 | FR-550 | FR-630 | FR-870 |
| Production Capacity | 0.2-0.5 t/h | 1 t/h | 2 t/h | 3-4 t/h | 5-6 t/h | 8-10 t/h | 15-18 t/h | 30-40 t/h |
| Screw Diameter | 180mm | 260mm | 350mm | 420mm | 500mm | 550mm | 630mm | 870mm |
| Screw Speed (r/min) | 5-15 | 5-15 | 5-15 | 5-15 | 5-15 | 5-15 | 5-15 | 5-15 |
| Hydraulic Power | - | - | - | 1.1 kW | 1.1 kW | 1.1 kW | 2.2 kW | 3 kW |
| Motor Power | 3-4 kW | 5.5-7.5 kW | 7.5-11 kW | 11-15 kW | 15-18.5 kW | 22 kW | 30 kW | 45 kW |
| Dimensions (m) | 1.8*0.55*0.92 | 2.2*0.7*1.2 | 3.38*0.9*1.45 | 4.28*1*1.75 | 5.105*1.2*2.05 | 5.22*1.22*2.15 | 5.8*1.3*2.25 | 6.8*1.53*2.475 |
| Weight | 450 kg | 900 kg | 1,300 kg | 2,600 kg | 3,050 kg | 3,550 kg | 4,300 kg | 7,400 kg |
Continuous Screw Press
Stainless Steel Dewatering Machine
Dewatering Process of Spent Grains
1. Pre-Treatment
- Crushing: Larger clumps of spent grains are broken down into uniform particles to improve press efficiency.
- Mixing: For materials with uneven moisture distribution, like beer spent grains, this step can improve the overall pressing result.
2. Pressing
- Feeding Control: White wine grains require slow feeding to prevent overload, while rice wine lees need steady, even feeding to prevent blockages.
- Pressure Adjustment: Pressure is controlled by adjusting screw speed and outlet gap. For example, materials with higher fiber content, such as white wine grains, require greater pressure. Recommended pressure sequence: White wine > rice wine > beer.
3. Discharge and Filtration
- Discharging: During the pressing process, the liquid is filtered out of the screen, while the solid material is discharged via the outlet.
- After dewatering, the moisture content of the spent grains can be reduced to 55%-60%, making them suitable for direct use as animal feed or for further drying and processing.
Features of Screw Press in Dewatering Spent Grains
1. High Efficiency and Energy Saving: Our screw press machine adopts mechanical pressure for dewatering, which is more efficient and energy-saving compared to other methods.
2. Simple Structure: The screw press has a relatively simple structure, making it easy to operate and maintain, thereby reducing operating costs.
3. Effective Dewatering: By adjusting the pressure and rotation speed, screw presses can achieve thorough dewatering of spent grains, resulting in a low-moisture cake that is easier to store and transport.
4. Customizable Options: Our screw press can be customized to meet your specific needs, including the screw design, screen opening size, machine material, and more. Additionally, it can be integrated with other equipment, such as a conveyor belt, to improve efficiency.
Why Choose Furui Machinery?
With years of experience in manufacturing and supplying screw press machines, Furui Machinery has successfully assisted hundreds of clients in various dewatering projects, including dewatering of spent mash and sawdust, paper pulp, juice production, and treatment of waste fruits and vegetables. We are confident in our ability to provide you with a tailored solution that best meets your specific needs. If you have any questions, please feel free to contact us!
