Description

DAGYEE Multi-Disc Screw Press – Sludge Dewatering for Food Processing & Beverage Industry

Product Overview

This is a multi-disc screw press specifically designed for sludge dewatering in the food processing and beverage industry. It handles the unique challenges of food industry sludges—high fat, oil, and grease (FOG) content, fibrous materials, proteins, and organic solids. The self-cleaning disc design prevents clogging even with sticky, fatty sludges that would blind conventional dewatering equipment.

The system operates continuously and automatically. Sludge is fed into the screw press, where a low-speed screw (2-5 RPM) pushes it through a gradually narrowing chamber. Water is squeezed out through gaps between fixed and moving discs, and the dewatered cake exits with 15-22% dry solids content, reducing sludge volume by up to 80-90%.

Food processing plants—dairy, meat, poultry, brewery, vegetable, and fruit processing—generate large volumes of high-strength wastewater with significant solids and FOG content. The DAGYEE screw press provides a cost-effective solution for reducing sludge volume, lowering disposal costs, and meeting environmental compliance requirements.

Working Principle

Step 1: Sludge Conditioning
Food processing sludge is pumped from a holding tank or DAF unit into a flocculation mixing tank. Polymer flocculant is added to condition the sludge, binding fine particles and FOG into larger, more stable flocs.

Step 2: Gravity Thickening
The conditioned sludge flows into the thickening zone of the screw press. Free water drains through the gaps between discs under gravity. The self-cleaning disc movement prevents FOG and fibrous materials from building up on the discs.

Step 3: Mechanical Compression
As the screw rotates, the sludge is pushed along the tapered shaft. The volume available to the sludge gradually decreases, creating a gentle pressing action that extracts water without damaging the flocs or shearing the solids.

Step 4: Water Discharge
Water is forced out through the gaps between discs. The filtrate is returned to the treatment plant or discharged.

Step 5: Cake Discharge
The dewatered cake exits through the discharge opening. Food processing sludges typically achieve 15-22% dry solids, depending on the sludge type.

Step 6: Continuous Self-Cleaning
The relative movement between fixed and moving discs creates a continuous self-cleaning action that prevents FOG and fibrous material from building up on the discs. This is critical for food processing applications.

Key Features

Dairy Processing
Dairy wastewater contains milk fats, whey proteins, and suspended solids. The screw press dewaters DAF float sludge and biological sludge from dairy treatment systems. The self-cleaning design handles high-fat sludges effectively, producing a dewatered cake suitable for disposal or land application.

Meat and Poultry Processing
Meat processing wastewater contains blood, animal fats, proteins, and suspended solids. The screw press handles high-FOG sludges without clogging. Dewatered cake can be sent to rendering or disposal. Reduces sludge volume significantly, lowering transport costs.

Breweries and Beverage Production
Brewery wastewater contains spent grains, yeast, and organic solids. The screw press dewaters biological sludge and DAF float. Handles fibrous materials without blinding. Produces a stable cake with 15-20% dry solids.

Vegetable and Fruit Processing
Vegetable and fruit processing generates fibrous sludge from peeling, cutting, and washing operations. The screw press handles fibrous materials effectively. Dewaters wash water solids and DAF float. Reduces volume for disposal.

Edible Oil Processing
Oil processing wastewater contains fats and organic solids. The screw press dewaters DAF float and biological sludge. Self-cleaning design handles oily sludges without blinding.

Technical Specifications

Standard models are listed below. Custom configurations are available upon request.

• Wear part life extended 2-3 times vs. standard machines

• Handles sludge with up to 40% solids concentration

• Processes abrasive materials (sand, grit, mineral fines) without excessive wear

• Reduced maintenance downtime (annual servicing vs. quarterly for standard units)

• Lower total cost of ownership over 5-10 year period

• Suitable for applications where grit and sand are present in sludge

• No filter belts or cloths to replace (reduced consumable cost)

• Standby capability for critical applications

Model	DS Capacity (kg/h)		Sludge Capacity (m³/h)			Power (kW)	Dimensions (mm)			Operating Weight (kg)
	Min	Max	2g/L	10g/L	20g/L		L	W	H
DL101	3	5	1.5	0.6	0.25	0.2	1816	756	1040	290
DL131	6	10	3.0	1.2	0.5	0.36	1969	756	1040	315
DL202	18	30	9.0	3.6	1.5	1.1	2930	1257	1470	1110
DL301	30	50	15.0	6.0	2.5	0.74	3255	985	1600	1320
DL302	60	100	30.0	12.0	5.0	1.1	3455	1295	1600	2230
DL352	120	200	60.0	24.0	10.0	6.0	4420	2100	2250	4850
DL403	180	300	90.0	36.0	15.0	6.0	4420	2100	2250	4850

Note: Capacity and cake dryness depend on sludge characteristics, polymer type, and dosage. A sludge test is recommended for accurate sizing.

Materials:

• Screw and rings – Stainless 304 (316L available for corrosive stuff)

• Housing – Stainless 304

• Frame – Carbon steel with epoxy coating

Cake solids: 15% to 30% depending on your sludge and chemical

Temperature range: 0°C to 60°C

Voltage: We match yours – 380V/50Hz, 460V/60Hz, or others

Comparison with Traditional Equipment

Each technology has appropriate applications. The selection depends on specific site requirements including sludge characteristics, available labor, energy costs, and budget constraints.

What this means for you:

• Want the driest cake possible? Get a centrifuge. But budget for power and repairs.

• Have almost no budget upfront? Get a belt press. But plan for labor and water.

• Want the lowest total cost and least headache? Get our screw press.

Applications

Municipal Wastewater Treatment Plants
Dewatering of primary and secondary sludge from municipal WWTPs. Achieves 15-22% cake dryness, significantly reducing disposal costs and meeting landfill acceptance criteria.

Food and Beverage Processing
Sludge from dairy, meat, brewery, and vegetable processing operations. The self-cleaning design handles high-fibre and greasy sludges effectively.

Pulp and Paper
Dewatering of primary sludge and fibre-laden residuals from pulp mills and paper machines. Excellent fibre handling capability prevents clogging.

Petrochemical and Oil Refineries
Sludge with elevated oil and grease content. The self-cleaning disc design prevents blinding.

Aquaculture and Fish Farming
Sludge and solid waste from fish farms. The screw press handles fibrous and high-solids waste effectively.

Chemical Processing
Dewatering of chemical sludge and metal hydroxide sludges.

Leather and Textile Industries
Sludge from leather tanning and textile dyeing operations. The system handles challenging, high-organic-content sludges.

Conditioning: The Key to Effective Dewatering

Why Choose DAGYEE Multi-Disc Screw Press?

Contact Us

DAGYEE offers a comprehensive range of sludge dewatering solutions to meet the diverse needs of municipal and industrial wastewater treatment facilities. From the energy-saving volute screw press and the high-performance decanter centrifuge to the heavy-duty belt filter press and the rapid-deployment mobile system, each product is engineered with the latest technology to deliver reliable performance, low operating costs, and minimal environmental impact.

The DAGYEE Multi-Disc Screw Press for food processing provides reliable, continuous dewatering for dairy, meat, brewery, and vegetable processing sludges. With self-cleaning design, food-grade construction, and low energy consumption, it reduces sludge volume, lowers disposal costs, and ensures compliance with environmental regulations.

Contact our team for a free consultation and customized system design for your food processing application.

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