Multi-disc Screw Press Dehydrator

The most efficient method of dewatering for municipal wastewater treatment plants and a wide range of industrial sewage sludge, containing fats, oils, fibrous and abrasive substances.
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The Esmil Multi-disc Screw Press dewatering system is an environmentally friendly, high-performance technology helping businesses save costs by optimizing waste management. Our multi-disc screw press dewatering equipment is capable of processing the most difficult sludge and ensuring effective wastewater treatment.
The Multi-disc Screw Press Dehydrator is used to mechanically dewater sludge generated in industrial and municipal wastewater treatment facilities. As the most efficient method of dewatering, it requires minimum staffing and reduces operational expenses.
Compared with any traditional dewatering system, this equipment is more advanced. It is designed to automatically dewater, thicken, and filter fluid both in highly concentrated sludge as well as sludge containing a large amount of water.
Maximize efficiency and decrease costs with the finest features
- Enclosed design to prevent odors and excessive noise (lower than 65 Db);
- Low energy consumption (1/20 compared to centrifuge);
- Low water consumption (1/8 of belt press);
- Automatic start-up, operation, and shutdown;
- Intuitive control system.
Benefits of using Esmil Multi-disc Screw Press system
- Low investment and operation cost
- Automatic and continuous operation
- Energy conservation and environmental friendliness
- No secondary pollution
- Compact and efficient design
- Suitable for wide range sludge dewatering.
Low energy usage, low consumption of water, and a smaller footprint are all incorporated in a single unit that consumes less space and ensures continuous operation. The dehydrator is equipped with innovative self-cleaning discs, which ensure smooth continuous functioning without pauses due to clogging.
This sludge press machine is fully automated, and the control cabinet is built directly into the machine. Upon programming, the equipment will run independently following the set algorithms.
Exceptional design for maximum productivity
The thickness of the sludge dewatering drum discs is 0.12″, which is more than the similar models from other manufacturers. Such design guarantees the reliability and durability of the system.
The inner diameter and width of the disks allow for a large internal volume, which in turn maximizes the performance. They are only made of stainless steel and are assembled into a structural frame to achieve a more rigid structure.
The rotating shaft of the sludge screw press continuously runs the moving ring to clean the filtration gaps ‒ this sophisticated design prevents clogging. In addition, flights edges of the screw are protected by a hard metal strip, ensuring a lifespan of more than 10 years.
The working principle behind the sludge dewatering technology
The screw press sludge dewatering machine is essentially a massive press, which consists of a few integral elements ‒ dewatering drums, rinsing system, process tank, dosing tank, and flocculant tank equipped with a stirrer. The machine looks like a screw within a multi-disc dewatering cylinder, where one disc is fixed and the other one is moving. The front section separates the solid and the liquid, while the back section dewaters the solid.
As the pitch of the screw shaft moves from the thickening section to the dewatering section, the distance between the fixed ring and the pivot ring of the sludge screw press gradually decreases. The screw flights inside the cylinder transport concentrated sludge to the endplate of the press. The outcome is wastewater and solid cake ready for disposal.
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Dimensions guide
The Esmil Multi-disc Screw Press Dehydrator is available in a range of sizes and models, depending on the size of your facility and the treatment that you would like to complete. The system is available with a dewatering unit that includes the necessary dewatering equipment, and it can also be mounted and fully assembled. See the available equipment dimensions below.
Dewatering drum construction
Capacity of MDQ and MDQ-C
Models Maximum capacities, up to Sludge of Municipal WWTP Industrial Aerobically stabilized Anaerobic DAF* 1% 3% 7% 5% lbDS/h gpm lbDS/h gpm lbDS/h gpm lbDS/h gpm lbDS/h gpm MDQ-101 / 101 C 40 8 11 2.2 13 0.9 40 1.1 39 1.6 MDQ-102 / 102 C 80 16 22 4.4 26 1.7 80 2.3 78 3.1 MDQ-103 / 103 C 120 24 33 6.6 39 2.6 120 3.4 117 4.7 MDQ-104 / 104 C 160 32 44 8.8 52 3.5 160 4.6 156 6.2 MDQ-105 / 105 C 200 40 55 11 65 4.3 200 5.7 195 7.8 MDQ-201 / 201 C 125 15 33 6.6 40 2.7 125 3.6 120 4.8 MDQ-202 / 202 C 250 30 66 13.2 80 5.3 250 7.1 240 9.6 MDQ-203 / 203 C 375 45 99 19.8 120 8 375 10.7 360 14.4 MDQ-204 / 204 C 500 60 132 26.3 160 10.6 500 14,3 480 19.2 MDQ-205 / 205 C 625 75 165 32.9 200 13.3 625 17.8 600 24 MDQ-351 C 600 54 150 30 180 12 565 16 540 22 MDQ-352 C 1,200 108 300 60 360 24 1,130 32 1,080 43 MDQ-353 C 1,800 162 450 90 540 36 1,695 48 1,620 65 MDQ-354 C 2,400 216 600 120 720 48 2,260 64 2,160 86 MDQ-355 C 3,000 270 750 150 900 60 2,825 81 2,700 108 MDQ-356 C 3,600 324 900 180 1,080 72 3,390 97 3,240 129 MDQ-351 CL 700 65 183 37 220 15 695 20 660 26 MDQ-352 CL 1,400 130 366 73 440 29 1,390 40 1,320 53 MDQ-353 CL 2,100 200 549 110 660 44 2,085 59 1,980 79 MDQ-354 CL 2,800 265 732 146 880 59 2,780 79 2,640 105 MDQ-355 CL 3,500 330 915 183 1,100 73 3,475 99 3,300 132 MDQ-356 CL 4,200 400 1,098 219 1,320 88 4,170 119 3,960 158 MDQ-451 C 1,400 130 367 73 440 29 1,390 40 1,320 53 MDQ-452 C 2,800 260 734 147 880 59 2,780 79 2,640 105 MDQ-453 C 4,200 390 1,101 220 1,320 88 4,170 119 3,960 158 MDQ-454 C 5,600 520 1,468 293 1,760 117 5,560 159 5,280 211 MDQ-455 C 7,000 650 1,835 366 2,200 146 6,950 198 6,600 263 MDQ-456 C 8,400 780 2,202 440 2,640 176 8,340 238 7,920 316 *- information is based on experience of dewatering DAF-sludge with relatively high O&G concentration (40-60%) from meat processing plants (slaughter, poultry) and milk processing plants, etc.
Dimensions and features of MDQ models
Model Drum diameter, in x number of drums, pcs Nominal rinsing water consumption, gpm Total rinsing water consumption*, gph Nominal rinsing water pressure, psi Installed power, HP Dimensions (LхWхH), in Weight dry/in operation, lb MDQ-101 4x1 4.2 4.2 22-44 0,99 73x35x79 1,000/2,310 MDQ-102 4x2 8.4 8.4 1,15 1,210/2,650 MDQ-103 4x3 12.6 12.6 1,4 74x43x79 1,430/3,420 MDQ-104 4x4 8.4 16.8 1,76 83x59x80 1,990/4,300 MDQ-105 4x5 12.6 21 1,92 2,200/4,630 MDQ-201 8x1 8.7 8.7 30-50 1,45 104x47x80 1,540/3,530 MDQ-202 8x2 17.4 17.4 1,78 1,770/3,970 MDQ-203 8x3 26.1 26.1 2,57 105x59x80 2,200/5,180 MDQ-204 8x4 17.4 34.8 3,38 111x83x83 2,670/6,950 MDQ-205 8x5 26.1 43.5 3,71 3,000/7,520 *- information is based on a typical cyclical rinsing once per 10 minutes for 10 seconds
Dimensions and features of MDQ-C models
Model Drum diameter, in x number of drums, pcs Nominal rinsing water consumption, gpm Total rinsing water consumption*, gph Nominal rinsing water pressure, psi Installed power, HP Dimensions (LхWхH), in Weight dry/in operation, lb MDQ-101 C 4x1 4.2 4.2 22-44 0.32 75x32x57 680/1,120 MDQ-102 C 4x2 8.4 8.4 0.48 880/1,350 MDQ-103 C 4x3 12.6 12.6 0.73 76x40x57 1,100/1,650 MDQ-104 C 4x4 8.4 16.8 0.89 84x56x57 1,430/2,200 MDQ-105 C 4x5 12.6 21 1.05 1,650/2,540 MDQ-201 C 8x1 8.7 8.7 30-50 0.58 104x40x65 1,100/2,200 MDQ-202 C 8x2 17.4 17.4 0.91 1,320/2,430 MDQ-203 C 8x3 26.1 26.1 1.5 104x52x65 1,650/2,870 MDQ-204 C 8x4 17.4 34.8 1.84 110x75x65 2,200/3,310 MDQ-205 C 8x5 26.1 43.5 2.18 2,430/3,530 MDQ-351 C 14x1 8,7 8.7 30-60 1.5 149x54x79 2,800/4,520 MDQ-352 C 14x2 17.4 2.75 156x59x82 5,020/8,380 MDQ-353 C 14x3 26.1 4.5 165x72x83 7,450/12,460 MDQ-354 C 14x4 17,4 34.8 6.0 177x90x88 9,700/17,640 MDQ-355 C 14x5 43.5 7.0 186x115x88 11,680/20,720 MDQ-356 C 14x6 52.2 8.0 194x135x88 13,000/23,150 MDQ-351 CL 14x1 11,6 11.6 1.5 164x53x79 3,040/5,110 MDQ-352 CL 14x2 23.2 2.75 171x59x82 5,620/9,700 MDQ-353 CL 14x3 34.8 4.5 180x72x83 8,380/14,330 MDQ-354 CL 14x4 23,1 46.2 6.0 202x90x88 11,020/20,280 MDQ-355 CL 14x5 57.8 7.0 202x115x88 13,670/24,700 MDQ-356 CL 14x6 69.3 8.0 210x135x88 15,650/28,000 MDQ-451 C 18x1 29 29 3.75 183x59x91 4,410/8,600 MDQ-452 C 18x2 58 7.5 193x70x92 8,160/15,430 MDQ-453 C 18x3 87 11 205x82x93 11,900/23,370 MDQ-454 C 18x4 116 14 213x100x93 15,640/30,420 MDQ-455 C 18x5 145 18 227x130x93 19,400/36,810 MDQ-456 C 18x6 174 21 232x153x93 23,150/43,430 *- information is based on a typical cyclical rinsing once per 10 minutes for 10 seconds for each rinsing valve (from 1 to 6 valves).
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