Stacked screw solid-liquid separator

Core advantage: Breaking through tradition and defining new industry standards

The advantages of the screw-type solid-liquid separator are significant: it uses low-speed screw compression and a dynamic filter slot structure, resulting in energy consumption per unit of processing capacity that is far lower than that of centrifuges.

Annual electricity consumption can be reduced by over one million kilowatt-hours, and no large amounts of rinse water are required, saving up to 50 tons of water per day. The integrated electrical control system enables 24/7 automatic operation, reducing labor costs by over 70%.

The dynamic filter slots effectively separate oily substances, preventing blockages, and can directly process sludge with a solids content of 0.3% to 3% without the need for a thickening tank; the equipment occupies only 50% of the floor space of a centrifuge, integrating multiple modules into one unit to save space; during operation, the low-speed rotation of the screw shaft reduces noise to below 65 decibels, and the sealed chamber reduces odor dispersion by 90%, achieving a comprehensive upgrade in efficiency, economy, and environmental friendliness.

Parameter Table of Stacked Screw Solid Liquid Separators

Successful case of solid-liquid separator

Solid liquid separator sold to Brazil

Field photo of Türkiye customer’s solid-liquid separator

Application scope of stacked screw solid-liquid separator

• Municipal sewage treatment

The remaining activated sludge is treated and dehydrated to reduce its moisture content to below 80%, making it easier to transport and incinerate. For example, after a sewage treatment plant in Nanjing adopted a screw press, the volume of sludge was reduced by 60%, saving 800,000 yuan in annual transportation costs.

• Industrial wastewater treatment

Dyeing and printing industry: Separates dyes and heavy metals, reducing COD in effluent to below 150 mg/L for compliant discharge.

Pharmaceutical industry: Treats antibiotic wastewater, avoiding secondary pollution caused by flocculation breakdown in traditional equipment.

Chemical industry: Treats solid particles and harmful substances in waste liquids and waste residues to ensure smooth production.

• Food and Agriculture

Juice processing: After dehydration, the moisture content of the residue is ≤65%, which can be directly used as feed or organic fertilizer raw materials, increasing resource recovery rates by 40%.

Animal husbandry: Treating pig manure and other livestock manure to produce organic fertilizer with a nitrogen content of ≥3%, promoting circular agriculture. For example, a pig farm uses a screw press to treat pig manure, achieving resource utilization.

sludge

pulp

animal manure

distillers grains

Frequently Asked Questions (FAQ)

Question 1: How dry will the final sludge cake be?
The dryness of the final product depends on the type of sludge you have. Generally, you can expect a final solids content of 15% to 25%. Some high-pressure machines might produce a slightly drier cake. But the stacked screw press achieves this result with far less energy and no risk of clogging.

Question 2: What is the main difference between this and your standard screw press?
Our standard Solid-Liquid Separator is a high-pressure machine. It is perfect for fibrous materials like cow manure. It uses a single screw pressing against a durable screen. The Stacked Screw Separator is a low-pressure, self-cleaning machine. It is designed specifically for low-concentration, oily, or difficult-to-dewater sludges.

Question 3: Is it difficult to operate and maintain?
No, it is incredibly easy. The system is designed for fully automated, 24/7 operation. A control panel manages everything. Maintenance is very low because the screw rotates so slowly. This means there is very little wear on the rings and other components.

Question 4: What industries can use this machine?
It is extremely versatile. The most common applications are municipal wastewater treatment plants. It is also used in slaughterhouses, food and beverage processing factories, dairies, chemical manufacturing, and the papermaking industry. It can handle almost any type of sludge that can be mixed with a polymer.

What are the types of solid-liquid separators

There are various types of solid-liquid separators, including spiral extrusion separators, inclined screen separators, and stacked screw separators, each with their own characteristics and applicable ranges. When choosing, it should be comprehensively considered based on actual needs, wastewater characteristics, and treatment requirements.

Stacked screw solid-liquid separator

Inclined screen solid-liquid separator

Spiral extrusion solid-liquid separator

The Stacked Screw Separator represents a major step forward in dewatering technology. Its unique, self-cleaning design completely solves the problem of clogging that affects other systems. This is especially true when dealing with oily and greasy waste. This reliability, combined with its extremely low power and water consumption, makes it the most intelligent and cost-effective investment for modern waste treatment. It simplifies your operations. It reduces your costs. It provides a dependable solution for turning problematic sludge into manageable solids.

Introduction to Fude Machinery Company

The production equipment includes: fermentation raking machine, dryer, granulator, crusher, mixer, round throwing machine, organic fertilizer production line, etc. The company will continue to adhere to the business philosophy of “quality first, customer first” and provide higher quality metal equipment solutions for global customers.
Since its establishment in 2015, Fude Machinery has been committed to providing high-quality and high-performance metal equipment solutions to global customers. With advanced production technology, strict quality control, and continuous innovative research and development capabilities, we have received customer satisfaction praise.