Micro Drum Filter

Primarily used in the final stage of wastewater treatment, micro drum filter can effectively reduce COD, BOD5, TSS, NH3-N, TN, TP from wastewater and upgrade effluent standard, meeting stricter standards for receiving water bodies or enabling wastewater reuse.

What Is a Micro Drum Filter?

Micro drum filter, also called microscreen drum filter, is specially used for advanced wastewater treatment to help you intercept 10–20 μm suspended particulates and colloidal matter. It features a fully enclosed tank design with inlet, outlet and drain (dirty outlet) ports, no submerged sections.

This ultra-fine mesh size design necessitates that TSS (Total Suspended Solids) < 30mg/L in the incoming water to ensure its drum screen doesn’t become clogged too quickly. Plus, due to the typical high flow design (large diameter + long length of drum), its drum screen can be designed in a segmented style for easy disassembly, cleaning, and replacement at any time.

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Micro Drum Filter Features

Our micro drum filters stand out with their unique advantages, including compact design, stable operation, easy maintenance, excellent filtration, and more.

Enclosed Structure

Fully enclosed design effectively isolates odors, enabling indoor installation; also, the sealed cover blocks photosynthesis, thereby effectively preventing algae growth during your operation, ensuring better quality of outlet water.

Ultra-fine Filtration

Can be equipped with ultra-fine mesh screens featuring micron-level apertures as small as 10 – 20 μm. This characteristic makes them an ideal choice for the final stage of wastewater treatment, ensuring effluent meets strict environmental regulations.

Easy Maintenance

Segmented screen design lets you replace only the damaged sections without needing to replace the entire drum. Also, the replacement procedure is simple and easy to operate, no specialized equipment or tools are required.

Continuous Operation

Equipment operates continuously with an automatic start/stop switch inside; drum rotation is controlled by signals from a liquid level sensor. Or PLC control can be selected for drum rotation and backwashing, without manual management.

Overload Protection

Equipped with overload protection devices and procedures at all stages to promptly contain hazards within manageable limits during short-circuit incidents and motor overloads. Electrical components inside the enclosure are Schneider or equivalent brands.

Compact Footprint

Smaller installation spaces are required compared with other conventional filtration systems at the same flow rate level. Not only saves space, but it also facilitates regular management, reducing manual time and costs.

Working Principle of Micro Drum Filter

Step 1: Water enters drum, level sensor sends a signal;
Step 2: Drive system is activated to rotate the drum;
Step 3: Backwashing pump is started at the same time;
Step 4: Wastewater flows into the drum and passes screen;
Step 5: Solids remain on the inner surface of drum screen;
Step 6: Solids are discharged from drain pipe by backwashing;
Step 7: Normal filtration continues concurrently with backwashing;
Step 8: Drum stops automatically when no water passing through.

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Diagram showing water flow, retained dirt, drum rotation, and spray cleaning of a micro drum filter.

Spray nozzle manifold above a drum screen with close-ups of nozzles, screen, and seals.

Backwashing System Design

Backwashing system comprises a backwash pump, flushing water pipes, nozzle system, sludge collection tank, and drainage pipeline. It functions by using a pump to draw the filtered water and spray it with high pressure, flushing the drum screens from the outside in.

Thus suspended solids which accumulated on the screen surfaces are rinsed away, bringing the screens back to life. Grundfos pumps are often utilized for our micro drum filters, or other equivalent brands, as you request.

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Technical Data

Whatever type of micro drum filter you are looking for, whether it is a standard model or a customized style, we’re always within your reach.

Data Sheet
After-sales Service
Gallery

Construction Material	SS 304/316/316L
Drum Screen Material	SS 304/316/316L/904L/310S, Duplex 2205/2507
Micron Rating	10–20 μm
Inlet Water TSS	≤ 30 mg/L
Outlet Water TSS	≤ 10 mg/L
Drum Length	1,000–4,700 mm
Drum Diameter	600–1,800 mm
Flow Capacity	5,00–30,000 m³/d
Backwashing Pressure	6–7 bar
Backwashing Water Consumption	20–100 m³/d
Connection	Flanged (DIN/ANSI/EN/JIS)
Inlet Flange Size	6–28 in
Outlet Flange Size	10–32 in
Drain Port Size	3–6 in
Power Supply	3Ph, 220V / 380V , 50/60 Hz
Proof Level	IP65

Other Drum Filter

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Externally Fed Rotary Drum Filter
Rotary Drum Fine Screen
Koi Pond Drum Filter
Aquaculture Drum Filter
Combi Drum Filter

Why Choose a Micro Drum Filter from Filson?

Filson is an experienced drum filter manufacturer in China for 20+ years, we always have high pursuit on most professional solutions with the highest product quality. From material purchasing to welding details, from fabrication to packing, we focus on every detail of the service you get.

Over 200 microscreen drum filters are supplied by Filson and are serving in various large or small-scale ultimate wastewater treatment projects worldwide, including the U.S., Canada, Norway, Greece, Singapore, Malaysia, Australia, Dubai, Azerbaijan… ask our sales for refereed case studies or feedback videos to learn more details.

1.What Key Parts Make up a Micro Drum Filter?

A micro drum filter includes five core components: the frame, filter drum, drive system, cleaning system, and automatic control system. Together, they ensure stable screening and continuous operation.

2.Can I Replace Micro Drum Filter Screens On-site Without Disassembling the Entire Drum?

Yes, you can. Micro drum filters use modular and segmented filter panels, which can be easily detached, swapped out, and reassembled right on-site. There is no need to take the entire drum apart at all.

During replacement, simply rotate the drum to position the target screen section above the water level, then shut down the equipment. No special tools or lifting equipment are required. Trained operators can quickly and safely replace the screen panels on-site.

3.What Equipment Typically Goes Before and After a Micro Drum Filter in Wastewater Treatment Setups?

In most wastewater treatment systems, you can install a micro drum filter right after primary separation units such as clarifiers or DAF systems. These pre-treatment devices first capture and remove the majority of larger solid particles, enabling the micro drum filter to perform finer screening in subsequent stages.

After passing through a micro drum filter, water typically enters biological treatment processes such as activated sludge systems, moving bed biofilm reactors (MBBR), or membrane bioreactors (MBR), depending on the treatment objectives.

4.Can Micro Drum Filters Remove Oils, Greases, or Dissolved Contaminants from Wastewater?

In practical applications, micro drum filters are specifically designed for solids particle removal and are not recommended for removing oils, greases, or dissolved contaminants. Oils and greases will permeate or adhere to the drum screen mesh and cannot be retained. Dissolved contaminants are too small to be captured by the filter media.

If you need to treat this type of wastewater, Dissolved Air Flotation (DAF) is recommended. Alternatively, the micro drum filter can be employed as a pretreatment unit preceding the DAF process.

5.Can I Set up Multiple Micro Drum Filters in Parallel?

Yes, they can. You can install multiple micro drum filters in parallel to handle higher flow rates. A flow distributor is usually used to split the incoming water evenly across all units. This configuration also means you can take one of the devices offline for maintenance without shutting down the entire system.

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