Submerged MBR Membrane Modules (HF & Flat Sheet)

// MODULE-02 / PROCUREMENT STRATEGY

The MBR Arsenal.
Hollow Fiber vs. Flat Sheet.

We don't force a single technology onto your project. We manufacture both major MBR architectures, allowing you to optimize for either CapEx (Municipal) or extreme resilience (Industrial).

Municipal / High Volume

Reinforced Hollow Fiber (HF)

The undisputed king of municipal wastewater. Offers the highest packing density (m² per m³ of tank volume) for lowest CapEx. Our fibers feature a braided PET inner support tube, achieving >600N tensile strength to completely eliminate fiber breakage. 100% drop-in replacement for SUEZ ZeeWeed 500D.

High Packing Density Lowest CapEx

Industrial / High MLSS

Heavy-Duty Flat Sheet (FS)

The ultimate tank for industrial effluents and landfill leachate. Rigid ABS backing plates mean absolutely zero hair clogging or fiber tangling. Tolerates extreme MLSS up to 18,000 mg/L and allows for aggressive in-situ chemical cleaning. 100% drop-in replacement for Kubota and Toray TMR140.

Zero Hair Clogging 18g/L MLSS Tolerance

// MODULE-03 / SPECIFICATION MATRIX

Universal Cassette Compatibility.

Standardized testing conditions. Data represents typical values for WANDONG OEM equivalents.

WANDONG Nomenclature

WD

+

HF/FS

+

340

Drop-In Replacement Targets

DATA SOURCE: OEM TECHNICAL BULLETINS

Architecture	SUEZ® Target	Toray® / Kubota® Target	WANDONG OEM Equivalent
Hollow Fiber Cassette 31.6 m² (340 ft²)	ZeeWeed® 500D (340)	-	WD-HF-340 MATCH
Hollow Fiber Cassette 34.4 m² (370 ft²)	ZeeWeed® 500D (370)	-	WD-HF-370 MATCH
Flat Sheet Element 1.4 m² Panel	-	Toray TMR140	WD-FS-140 MATCH
Flat Sheet Element 1.5 m² Panel	-	Kubota Type 510	WD-FS-150 MATCH

WANDONG OEM Verified Parameters

Model	Membrane Area	Pore Size (µm)	Material	Design Flux (LMH)	Max MLSS (g/L)
WD-HF-340	31.6 m² (340 ft²)	0.04	Reinforced PVDF	15 - 25	12
WD-HF-370	34.4 m² (370 ft²)	0.04	Reinforced PVDF	15 - 25	12
WD-FS-140	1.4 m² / panel	0.08	PVDF + ABS	15 - 25	18
WD-FS-150	1.5 m² / panel	0.10	PVDF + ABS	15 - 25	18

Process Engineer's Note: Flux vs. MLSS Dynamics

Operating flux must be inversely proportional to the Mixed Liquor Suspended Solids (MLSS) concentration. Pushing high flux (e.g., >25 LMH) in thick industrial sludge (>12g/L) will result in rapid EPS (Extracellular Polymeric Substances) fouling and irreversible pore blockage. Always design conservatively based on your specific aeration tank biology.

// MODULE-04 / MECHANICAL COMPATIBILITY

Seamless Retrofits.

Replacing MBR cassettes shouldn't require modifying your stainless steel headers or aeration grids. WANDONG OEM modules are engineered with exact dimensional tolerances to slide perfectly into your existing SUEZ, Toray, or Kubota frames.

Physical Specs (WD-HF-340 / SUEZ ZW500D Eq.)

Module Height

2,198 mm (86.5")

Module Width

844 mm (33.2")

Module Depth

49 mm (1.9")

Flow Path

Outside-In (Immersed)

>600N HF Tensile Strength

1.9mm HF Outer Diameter

ABS FS Backing Plate

HF CASSETTE

H: 2198 mm

W: 844 mm

// MODULE-05 / ENGINEERING ANATOMY

Deconstructing the Immersion Core.

Operating in thick, abrasive biological sludge requires uncompromising structural integrity. Explore the architecture that prevents fiber breakage and hair clogging.

3D Cross-Section of PET Braided Hollow Fiber and ABS Flat Sheet MBR Membrane

Internal Architecture

1. PET Braided Support (Hollow Fiber)

Standard PVDF fibers snap under the violent agitation of MBR aeration. Our HF series features a woven PET (Polyethylene Terephthalate) inner tubular braid. The PVDF active layer is coated directly onto this braid, resulting in a terrifying tensile strength of >600N. Zero broken fibers, guaranteed.

2. Rigid ABS Backing (Flat Sheet)

For extreme industrial MLSS, our FS series utilizes a rigid ABS backing plate. The PVDF membrane is ultrasonically welded to this plate. The physical gap between plates ensures that hair, fibrous materials, and thick sludge can never tangle or clog the module.

3. Integrated Aeration Grids

Both architectures rely on coarse bubble aeration installed directly beneath the modules. The rising air bubbles continuously scour the membrane surface, shaking off the biological cake layer and providing oxygen to the biomass simultaneously.

// MODULE-06 / OPERATING LIMITS

Comprehensive Operating Limits.

Strict adherence to these parameters ensures optimal performance and validates the 12-month limited warranty.

Typical Operating TMP	-10 to -30 kPa (Vacuum)
Maximum Operating TMP	-55 kPa (-8 psi)
Max MLSS (Hollow Fiber)	12,000 mg/L
Max MLSS (Flat Sheet)	18,000 mg/L
Operating pH Range	5.0 - 9.5
Cleaning pH Range (CIP)	2.0 - 10.5
Maximum Operating Temperature	104°F (40°C)
Max Chlorine Exposure (NaOCl)	1,000 ppm (for CIP)

Filtrate Quality Guarantee

Turbidity: ≤ 1.0 NTU (Consistently <0.1 NTU in optimal conditions).
TSS: < 1 mg/L (100% retention of activated sludge).
SDI: < 3.0 (Direct feed to RO systems).

Aeration & Pumping Protocol

MBR systems require strict PLC sequencing to prevent irreversible fouling:

1. Relaxation Cycle: Suction pumps MUST operate on a cycle (e.g., 10 mins ON, 2 mins OFF) to allow air scouring to clear the membrane surface.
2. Continuous Aeration: Coarse bubble aeration must run continuously during the suction phase.

// MODULE-08 / SELECTION GUIDE

Architecture-Based Selection.

Selecting the correct MBR architecture is dictated by your wastewater's MLSS concentration and pre-screening capabilities.

Municipal Sewage

High Volume / Low MLSS

Hollow Fiber (HF) Series

Maximum packing density for the lowest CapEx. Ideal for large-scale municipal plants with reliable 1mm fine screening.

Standard Choice

Industrial Effluent

High COD / High MLSS

Flat Sheet (FS) Series

Rigid ABS plates prevent hair clogging and tolerate extreme MLSS up to 18g/L. The ultimate choice for chemical and food wastewater.

Currently Viewing

SUEZ® Retrofit

ZW500D Replacement

WD-HF-340/370

Engineered specifically to match the exact dimensions and header connections of SUEZ ZeeWeed® 500D cassettes.

Specialized Retrofit

// MODULE-09 / APPLICATION SCENARIOS

Eradicate Secondary Clarifiers.

By replacing gravity settling with absolute membrane filtration, MBR systems cut plant footprint by 50% while delivering RO-ready effluent.

Municipal Sewage

Hollow Fiber modules provide massive surface area for city-scale wastewater plants.

Industrial Chemical Plant High MLSS Wastewater Treatment

Industrial Effluent

Flat Sheet modules conquer high-COD, high-MLSS chemical and textile wastewater.

Hospital and Luxury Hotel Underground MBR Water Recycling

Hospitals & Hotels

Compact underground MBR skids for safe, odorless on-site water recycling.

Landfill Leachate

The crucial biological step before high-pressure DTRO concentration.

// MODULE-10 / FACTORY & INVENTORY

Automated Fabrication.

Whether it's the ultrasonic welding of flat sheets to ABS plates, or the high-density epoxy potting of reinforced hollow fibers, WANDONG controls the entire manufacturing process to guarantee zero leakage in the harshest sludges.

Robotic Ultrasonic Welding (FS)

100% Vacuum Integrity Tested

Massive Stock of Standard Cassettes

Robotic Ultrasonic Welding for Flat Sheet MBR

Massive Warehouse Inventory of MBR Cassettes and Stacks

Workers Assembling Stainless Steel MBR Frames

// MODULE-11 / PROVEN IN THE FIELD

Powered by WANDONG.

We don't just sell components; we build the heavy-duty systems that rely on them. Our HF and FS modules are the beating heart of our own Packaged MBR Sewage Plants deployed across the globe.

The Integrator's Advantage

Because we use these exact modules in our own $500,000+ EPC projects, they undergo rigorous internal quality control that pure trading companies simply cannot match. We stake our entire plant's performance on these elements.

WANDONG Packaged MBR Plant Basin Aeration

FIELD DEPLOYMENT

WANDONG MBR Basin

Showcasing the vigorous aeration boiling above our submerged modules.

// MODULE-12 / THE ENGINEER'S UNBOXING

Built for the Field.
Delivered with Certainty.

We deliver a risk-free deployment experience engineered for remote sites and harsh environments.

Industrial-Grade Traceability

High-contrast waterproof labels with exact specs, batch numbers, and a unique serial number (S/N). Matched to our OEM database to eliminate gray-market risks. No guessing for your field team.

Integrity Test Certificate

Open the crate and find the hardcopy Vacuum Decay Test Certificate right on top. Out-of-the-box trust that guarantees zero broken fibers or plate leaks before installation.

Export-Grade Preservation

Modules are shipped wet, preserved in a Glycerin/SMBS solution, and sealed. Encased within heavy-duty fumigated wooden crates engineered to resist harsh global sea-freight transit.

// MODULE-13 / LOGISTICS MATRIX

Heavy-Duty Export Crating.

MBR cassettes are massive stainless steel structures. We utilize heavy-duty fumigated wooden crates optimized for secure FCL sea-freight and flat-rack shipping.

Single HF Membrane Module

SPARE PART

Dimensions (L×W×H)

~2250 × 880 × 100 mm

Dry Weight

~15.0 kg (33 lbs)

Wet Weight

~25.0 kg (55 lbs)

Packaging

Carton / Pallet

* Values are for a single WD-HF-340 module (ZW500D Eq.) without the stainless steel frame.

Complete HF Cassette (48 Modules)

WOODEN CRATE

Dimensions (L×W×H)

~2300 × 900 × 1500 mm

Dry Weight

~1,200 kg (2,645 lbs)

Wet Weight

~1,600 kg (3,527 lbs)

Container Loading

10 Units / 40'HQ

* Includes SS304 frame, aeration grids, and permeate manifolds. Ready to drop into basin.

// MODULE-14 / GLOBAL O&M SUPPORT

Direct Access to Senior Process Engineers.

MBR fouling is 90% caused by poor biological health, not the membrane itself. Our clients get direct WhatsApp and Email access to our senior process engineers for MLSS optimization, F/M ratio tuning, and CIP chemical dosing formulas.

Biology Optimization PLC Sequence Support 24/7 Standby

Chat with Engineer Email Support Desk

// MODULE-15 / TECHNICAL FAQ & WARRANTY

Hardcore FAQ.
Engineering-Grade Answers.

Should I choose Hollow Fiber or Flat Sheet for my project?

It depends entirely on your wastewater profile:

1. Choose Hollow Fiber (HF) if you are treating municipal sewage or light industrial wastewater with good pre-screening (e.g., 1mm fine screen). It offers the lowest CapEx and highest packing density.
2. Choose Flat Sheet (FS) if you are treating high-concentration industrial effluent, landfill leachate, or if your site lacks reliable fine screening. FS cannot suffer from hair clogging and tolerates much higher MLSS (up to 18g/L).

Are your HF cassettes compatible with SUEZ ZeeWeed 500D?

Yes. Our WD-HF-340 and WD-HF-370 cassettes are engineered with the exact same dimensions (2198 x 844 x 49 mm) and permeate/aeration header connections as the SUEZ ZW500D series. You can slide them directly into your existing stainless steel racks.

Why is the "PET Braided Support" so important for Hollow Fibers?

In an MBR tank, the coarse bubble aeration violently shakes the fibers to prevent sludge buildup. Cheap, unsupported PVDF fibers will stretch and snap within months, allowing raw sewage to contaminate the permeate. Our PET braided inner tube provides a tensile strength of >600N, making the fibers virtually unbreakable under normal operation.

What is your warranty policy?

We provide a strict 12-Month Limited Warranty against manufacturing defects (such as potting resin failure or delamination). The warranty is voided if failure is caused by exceeding the maximum TMP (-55 kPa), exceeding the maximum chlorine exposure limit, or failing to implement proper pre-screening (e.g., missing a 1-2mm fine screen for HF modules).

How often should we perform Chemical Cleaning (CIP)?

MBR systems require two types of cleaning:

1. Maintenance Cleaning (MC): Usually performed once a week using a low concentration of Sodium Hypochlorite (NaOCl) to remove light bio-fouling.
2. Recovery Cleaning (CIP): Performed every 3 to 6 months using higher concentrations of NaOCl (for organics) and Citric Acid (for inorganics) when the TMP approaches the maximum limit.

How do you guarantee there are no broken fibers or leaks before shipping?

Every single WANDONG MBR module undergoes a rigorous Vacuum Decay Test (Integrity Test) at our ISO 9001 facility before packaging. We apply a vacuum to the permeate port and monitor the decay rate to ensure 100% of the fibers and potting resin are perfectly intact. The hardcopy test certificate is included in every crate.

// MODULE-16 / INITIATE PROTOCOL

YOUR 50,000m²
OEM SUPPLY BACKEND.

Secure your global supply chain with factory-direct economics. Whether you need a few flat sheet stacks for a pilot plant or 200 HF cassettes to retrofit a municipal facility, our engineers will provide a precise drop-in replacement proposal within 1 hour.

1h

INITIAL RESPONSE

1-ON-1

CUSTOM PROPOSAL

$0

CONSULTATION FEE

// SECURE YOUR SUPPLY CHAIN

Request Dispatch & Pricing

Work Email *

WhatsApp / Phone

Target Part Number *

Quantity *

Raw Water Report or Old Specs (Optional)

DROP FILE OR CLICK

.PDF / .XLSX / .CSV / MAX 10MB

Notes & Destination Zip Code

Not sure which model fits your rack? Attach a photo of your existing MBR basin and our engineers will confirm the dimensions.

AVG. RESPONSE: < 4 HRS · NDA AVAILABLE ON REQUEST

The Heart of the Bioreactor.

The MBR Arsenal.Hollow Fiber vs. Flat Sheet.

Reinforced Hollow Fiber (HF)

Heavy-Duty Flat Sheet (FS)

Universal Cassette Compatibility.

Process Engineer's Note: Flux vs. MLSS Dynamics

Seamless Retrofits.

Physical Specs (WD-HF-340 / SUEZ ZW500D Eq.)

Deconstructing the Immersion Core.

1. PET Braided Support (Hollow Fiber)

2. Rigid ABS Backing (Flat Sheet)

3. Integrated Aeration Grids

Comprehensive Operating Limits.

Filtrate Quality Guarantee

Aeration & Pumping Protocol

Architecture-Based Selection.

Hollow Fiber (HF) Series

Flat Sheet (FS) Series

WD-HF-340/370

Eradicate Secondary Clarifiers.

Municipal Sewage

Industrial Effluent

Hospitals & Hotels

Landfill Leachate

Automated Fabrication.

Powered by WANDONG.

The Integrator's Advantage

WANDONG MBR Basin

Built for the Field.Delivered with Certainty.

Industrial-Grade Traceability

Integrity Test Certificate

Export-Grade Preservation

Heavy-Duty Export Crating.

Single HF Membrane Module

Complete HF Cassette (48 Modules)

Direct Access to Senior Process Engineers.

Hardcore FAQ.Engineering-Grade Answers.

YOUR 50,000m² OEM SUPPLY BACKEND.

Request Dispatch & Pricing

The Heart of the
Bioreactor.

The MBR Arsenal.
Hollow Fiber vs. Flat Sheet.

Built for the Field.
Delivered with Certainty.

Hardcore FAQ.
Engineering-Grade Answers.

YOUR 50,000m²
OEM SUPPLY BACKEND.