Screw Dehydrator for Sludge Dewatering

Sludge Dewatering

Need help?

ArCh Enviro Equipment Private Limited
104/105, Veda Commercial Complex, TP-13
Canal Road, Chhani, Vadodara – 390002
Gujarat, India
Phone: +91 98939 70123
Email: info@archenviro.com

Product Overview

The Screw Dehydrator by ArCh Enviro is an integrated sludge dewatering solution that combines sludge thickening, conditioning, and compression into one compact unit. Designed for continuous operation in Effluent Treatment Plants (ETP) and Sewage Treatment Plants (STP), it offers high-efficiency separation of water and solids with low energy consumption and minimal maintenance.

Using a stainless steel screw and disc mechanism, the system achieves an outlet sludge consistency of 15–25%, with inlet sludge concentrations typically around 1%. The small footprint and reliable operation make it an ideal choice for industries seeking effective sludge management.

Key Features

Three-stage process: Sludge conditioning, thickening, and dewatering in one unit
Outlet sludge consistency: 15–25%
Low energy requirement: 0.5 HP to 5 HP
Low wash water usage: Efficient design minimizes cleaning needs
Jam and clog-free operation with self-cleaning design
Material of construction: Stainless steel SS304 / SS316
Inlet sludge concentration: 1% DS; flow rates from 0.5 to 25 m³/h
Suitable for continuous operation in varied industrial applications

Applications

Wastewater treatment plants
Sludge dewatering in STP/ETP units
Food & beverage processing industries
Pharmaceutical and chemical plants
Textile and dyeing units
Sugar and distillery sludge handling
Brewery and fermentation waste management

You can also integrate it with the Screw Conveyor Compactor or Belt Filter Press for post-dewatering sludge handling.

Technical Specifications

Parameter	Specification
Outlet Consistency	15–25%
Inlet Flow (1% sludge)	0.5 m³/h to 25 m³/h
Power Requirement	0.5 HP to 5 HP
Construction Materials	Stainless Steel SS304 / SS316
Design Zones	Conditioning → Thickening → Dewatering
Moisture in Final Cake	~75%
Cleaning Requirement	Minimal, self-cleaning discs and screw

Working Principle

The Screw Dehydrator works on a three-stage principle. First, sludge enters the conditioning zone, where solids begin to concentrate. It then flows into a thickening zone, where a slow-moving screw helps separate water. Finally, the dewatering press zone compresses the sludge further, reducing water content. Water drains out through gaps between the discs, while the screw continuously moves solids toward the discharge point, producing a compact sludge cake.

Operational Advantages

Space-efficient: Compact design suits space-limited installations
Energy-saving: Operates at low horsepower
Low noise and vibration
Clog-resistant: Self-cleaning discs reduce downtime
No pre-thickening required
Can reduce sludge volume significantly before disposal
Sludge cakes may be reused for composting or agricultural use

Why Choose ArCh Enviro

ArCh Enviro designs sludge handling equipment built for India’s industrial and municipal challenges. Our Screw Dehydrator systems are made with durable stainless steel, tailored to your sludge characteristics, and engineered for long-term operation with low operating costs.

For enhanced performance, you can pair the Screw Dehydrator with our Submersible Mixer MX-II or Parabolic Screen for upstream solid-liquid separation.

Frequently Asked Questions

Q1. What is the outlet consistency of sludge from a Screw Dehydrator?
The system can deliver outlet sludge with 15–25% solid content.

Q2. Can it handle industrial sludge with oils or grease?
Yes, the clog-free screw and disc design handles a range of sludge types including oily and fibrous sludge.

Q3. Does it require high wash water?
No, it operates with minimal wash water due to the self-cleaning mechanism.

Q4. Is it suitable for small ETPs?
Yes, the compact design and low power requirement make it suitable for small- to medium-scale plants.

See how ArCh Enviro Equipment delivers proven wastewater treatment solutions across real-world projects.