What Is a Rotary Drum Screen?
A rotary drum screen (also known as a rotary drum filter or rotary sifter) is a vital component in municipal and industrial wastewater treatment systems. Positioned as the second stage of pre-treatment, right after initial screening, it is typically installed at the discharge point of lift stations where wastewater is collected.
This robust filtration system effectively captures fine and coarse debris, including trash rack residues (RAG), sand, grease, and other solids. By removing these contaminants early in the process, the rotary drum screen prevents them from mixing with sludge and disrupting downstream operations.
Precision Filtration with Rotary Drum Screens
Designed for fine separation, rotary drum screens feature customizable mesh sizes ranging from 0.25 mm to 2.5 mm, ensuring optimal filtration based on specific treatment needs.
Two Primary Types of Rotary Drum Screens:
1. V-Wire Screens – Engineered for superior flow efficiency, the V-shaped design prevents clogging by allowing particles to slide through smoothly. Unlike perforated plates, V-wire screens have no rough edges, enhancing durability and performance.
2. Perforated Metal Screens – A cost-effective alternative, ideal for applications requiring moderate filtration.
With their outer-feed design, rotary drum screens excel at handling tough waste and greasy effluents, making them a top choice for demanding environments.
Rotary Drum Screens Key Benefits
Why are rotary drum screens a preferred choice in wastewater treatment?
✅ Compact Design – Saves valuable space in treatment plants.
✅ Low Maintenance – Requires minimal upkeep—just routine checks for smooth operation, proper scraping, and unclogged spouts, along with bearing lubrication.
✅ Fully Automated – Self-cleaning mechanism activates with the lift station pumps, ensuring hassle-free operation.
✅ Efficient Solid-Liquid Separation – The finer the mesh, the better the filtration, keeping unwanted solids out of sludge and reducing disposal costs.
✅ Downstream Protection – Prevents pump clogging, valve malfunctions, and sand buildup in basins, safeguarding the entire treatment process.
Versatile Applications Across Industries
Rotary drum screens are indispensable in multiple sectors, including:
Municipal & Industrial Wastewater Treatment – Ideal for pre-treatment and storm overflow management.
Food Processing – Effective in solid-liquid separation for dairy, meat, and beverage production.
Pulp & Paper Mills – Handles fibrous waste with ease.
Textile Industry – Perfect for dyeing, bleaching, and fabric wastewater treatment.
Chemical & Pharmaceutical – Ensures compliance with strict effluent standards.
MBBR (Moving Bed Biofilm Reactor) Systems – Highly recommended for fixed-culture processes.
Advanced Wastewater Screening Solutions
From perforated screens to wedge-wire filters, our rotary drum screens deliver precision filtration, dewatering, and compacting—ensuring optimal performance at every stage.
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