Rotary Drum Screen (Integrated Fine Screen)

Q: Can this Drum Screen be installed in my existing channel, or do I need a tank?

The Loway Rotary Drum Screen is designed for flexible installation. It can be installed directly into an existing concrete channel at a 35° to 45° inclination angle. For above-ground applications or sites without a channel, the unit can be supplied pre-mounted in a stainless steel tank, ready for pipe connection.

Q: How do I choose the right gap size (slot size) for my application?

We offer customizable gap sizes from 0.3mm to 10mm. For MBR protection or fine fiber recovery such as paper or textile applications, 0.3mm to 1.0mm is recommended. For general municipal wastewater or slaughterhouse pretreatment, 1.0mm to 3.0mm is the standard choice.

Q: Does the screen require a backwash water source?

Yes. The system uses a high-pressure spray bar to prevent clogging. A wash water source with a pressure of 0.3 to 0.6 MPa is required. This ensures fibers and solids are effectively removed from the mesh and discharged through the screw conveyor.

Q: How does the equipment handle high-grease or sticky wastewater?

The rotary drum design helps minimize clogging. For high-grease or high-viscosity wastewater such as food processing effluent, increasing the spray flushing frequency is recommended. The integrated screw press helps dewater the solids and discharge a drier cake.

Q: What is the maintenance routine for this equipment?

Maintenance requirements are low. Routine maintenance includes checking spray water pressure, inspecting the discharge outlet for blockages, and periodically verifying the electric control system and overload protection functions.

High-Performance Solid-Liquid Separation for Municipal & Industrial Wastewater

Combine screening, washing, and dewatering in a single compact unit. Engineered for precision capture rates and protection of MBR membranes and downstream pumps.

The Loway Rotary Drum Screen is a robust, all-in-one pretreatment solution designed to remove suspended solids, floating debris, and fibers from wastewater. By integrating a rotary drum filter with a screw conveyor press, this system delivers continuous filtration and significant volume reduction of screenings. It is the ideal “first line of defense” for protecting sensitive biological processes and membrane systems.

How It Works: The 3-Stage Integrated Process

Our Rotary Drum Screen operates on a continuous, fully automated cycle designed for maximum efficiency and minimal maintenance.

1. Filtration:

Wastewater flows into the drum basket. Solids larger than the selected gap (0.3mm–10mm) are trapped on the screen surface, while clean water passes through the mesh by gravity.

2. Transport & Cleaning:

As the drum rotates at a low speed, the captured solids are lifted to the top zone. A high-pressure spray system washes the organic matter back into the flow and dislodges the debris into the central trough.

3. Dewatering & Discharge:

The internal screw conveyor transports the screenings to the press zone. Here, the solids are compacted to remove excess water (achieving 25%-45% solid content) before being discharged, significantly reducing disposal volume and costs.

Engineered for Reliability and Efficiency

3-in-1 Compact Design:

Integrates filtration, conveying, and dewatering in one unit. This reduces the equipment footprint and simplifies civil work requirements.

Superior Corrosion Resistance:

All wetted parts and the drum mesh are manufactured from 304 or 316L Stainless Steel, ensuring long service life in aggressive sewage environments.

High Capture Efficiency:

With custom gap sizes ranging from 0.3mm to 10mm, the screen offers a fiber recovery rate of >80%, making it perfect for MBR pretreatment and industrial fiber recovery.

Intelligent Automation:

Equipped with a PLC control system that supports both Level Differential and Timer modes. It features overload protection and auto-reverse functions for unmanned, safe operation.

Self-Cleaning Operation:

The combination of drum rotation and high-pressure spraying prevents clogging, ensuring stable operation with low head loss and minimal energy consumption.

Standard Model Specifications

The table below represents standard LWZG models. We offer full customization for channel width, discharge height, and flow capacity based on your site conditions.

Model		LWZG-600	LWZG-800	LWZG-1000	LWZG-1200	LWZG-1400	LWZG-1600	LWZG-1800
Drum diameter (mm)		Ø600	Ø800	Ø1000	Ø1200	Ø1400	Ø1600	Ø1800
Standard screen length (mm)		650	850	1000	1200	1400	1600	1800
Conveying pipe diameter (mm)		159	219	219	273	273	325	325
High water level in front of the screen H3 (mm)		400	500	650	800	900	1100	1250
Standard installation angle (°)		35°	35°	35°	35°	35°	35°	35°
Ordinary channel depth (mm)		650~800	700~1000	900~1200	1100~1400	1200~1600	1400~1800	1800~2000
Slag discharge height (mm)		800~1200	800~1200	800~1200	800~1200	800~1200	800~1200	800~1200
Motor power (kW)		0.55	0.75	1.1	1.5	2.2	3	3
Water volume estimate (m³/h)	1mm	125	215	370	505	720	950	1205
	2mm	190	330	555	765	1095	1440	1830
	3mm	230	400	680	935	1340	1760	2235
	4mm	235	430	720	1010	1440	2050	2700
	5mm	250	465	795	1105	1575	2200	2935

Material: SS304 (Standard) / SS316L (Optional) / Frame available in Epoxy Coated Carbon Steel.
Installation: Standard inclination is 35°, typically installed directly in the channel or a stainless steel tank.

Seamless Integration & Intelligent Control

At Loway Equipment, we engineer our Rotary Drum Screens to minimize civil work modifications and simplify the commissioning process for onsite contractors.

Flexible Installation Methods:

The equipment is designed to be installed directly into existing water channels at a standard 35-degree inclination angle, which can be adjusted according to specific site requirements. For facilities without existing concrete channels, the screen can be supplied pre-mounted within a custom steel tank enclosure, ensuring adaptability to diverse installation scenarios.

Plug-and-Play Setup:

Once the main frame is secured in place, installation is straightforward; operators simply need to connect the high-pressure flush water pipe and the electrical control panel to begin commissioning.

Precision Customization:

To perfectly match your specific water quality and flow rates, the screen gap size is fully customizable ranging from 0.3mm to 10mm. This precise engineering allows the equipment to achieve a solid-liquid separation efficiency with fiber recovery rates exceeding 80%.

Advanced PLC Automation:

Every unit is equipped with a PLC intelligent control system designed for completely unmanned operation. The system supports dual start/stop modes based on either time intervals or liquid level differentials. Built-in safety protocols include overload alarms and automatic shutdown protection to safeguard the motor and drive mechanism during abnormal conditions.

Rigorous Factory Testing:

Production strictly follows the ISO 9001 quality management system. The core drum filter is fabricated from 304 or 316L stainless steel utilizing advanced laser welding technology. To guarantee out-of-the-box reliability and eliminate operational risks, every single unit must pass a rigorous 72-hour continuous running test before leaving our facility.

Proven Performance Across Industries

Municipal Wastewater:

Headworks screening for Sewage Treatment Plants (STP) and protection of downstream pumps.

Membrane Protection (MBR/RO):

Fine screening (1mm-2mm) to prevent hair and debris from clogging sensitive membrane modules.

Food & Beverage / Slaughterhouses:

Removal of fruit peels, meat scraps, and fat.

Pulp & Paper:

Fiber recovery and reject separation.

Textile & Dyeing:

Interception of lint and fabrics.

Frequently Asked Questions

Have More Questions? Our technical team is ready to provide detailed, personalized guidance.

Q1: Can this Drum Screen be installed in my existing channel, or do I need a tank?

The Loway Rotary Drum Screen is highly flexible. It is designed to be installed directly into an existing concrete channel at a standard 35° to 45° inclination angle. If you do not have a channel, or for above-ground applications, we can supply the unit pre-mounted in a stainless steel tank (box), ready for pipe connection.

Q2: How do I choose the right gap size (slot size) for my application?

We offer customizable gap sizes ranging from 0.3mm to 10mm.

For MBR protection or fine fiber recovery (e.g., paper/textile), we recommend 0.3mm – 1.0mm.

For general municipal wastewater or slaughterhouse pretreatment, 1.0mm – 3.0mm is standard.

Q3: Does the screen require a backwash water source?

Yes. To prevent the mesh from clogging, the system uses a high-pressure spray bar. You need to connect a wash water source with a pressure of 0.3 – 0.6 MPa. This ensures that fibers and solids are effectively dislodged from the mesh and flushed into the screw conveyor.

Q4: How does the equipment handle high-grease or sticky wastewater?

The rotary drum design naturally minimizes clogging. However, for high-grease or high-viscosity applications (like food processing), we recommend increasing the flushing frequency of the spray system. The integrated screw press will then squeeze out the water and grease, discharging a dryer solid cake.

Q5: Can the screen handle hard solids like stones or metal parts?

No. The Rotary Drum Screen is designed for suspended solids, fibers, and organic debris. Strictly avoid introducing large hard objects like stones or metal blocks, as they can damage the fine screen mesh or the drum structure. For inlets with such risks, we recommend installing a Coarse Bar Screen upstream.

Q6: What is the maintenance routine for this equipment?

Maintenance is low. Routine tasks include:

Checking the spray water pressure to ensure effective cleaning.

Inspect the discharge outlet to ensure no blockage.

Verifying the electric control system and overload protection functions periodically.

Rotary Drum Screen (Integrated Fine Screen)

High-Performance Solid-Liquid Separation for Municipal & Industrial Wastewater

Combine screening, washing, and dewatering in a single compact unit. Engineered for precision capture rates and protection of MBR membranes and downstream pumps.