LF-LM Series PVDF Submerged MBR Ultrafiltration Membrane Module For Sewage Treatment

Dedicated for sewage reuse MBR bioreactor, Coalescing Filter matching MBR UF membrane is submerged negative pressure PVDF MBR module, different from conventional external pressure Ultrafiltration membrane for RO pretreatment. The special large-caliber hollow fiber filament of this sewage ultrafiltration membrane has strong tensile resistance, tolerates high concentration activated sludge mixed liquid, and effectively intercepts sludge flocs, bacteria and macromolecular organic pollutants in sewage. Ordinary UF membrane is easy to break filament under high sludge concentration, while LF-LM series modified PVDF material has outstanding oxidation resistance, can bear sodium hypochlorite regular online chemical cleaning, greatly extend service life of wastewater treatment filter. All MBR membrane modules belong to Water Filter Element (RO & UF Membrane) sewage treatment product line, after MBR clear water can directly enter SW/BW RO membrane for advanced desalination, front coarse filtration matched with High Flow Filter.

Working Principle of LF-LM Submerged MBR UF Membrane

LF-LM MBR UF membrane is fully submerged inside biochemical sewage tank, negative pressure suction force is applied on the inner side of hollow fiber filament. Clean water molecules penetrate the 0.1μm PVDF membrane wall into the fiber inner cavity and extracted as clear produced water; activated sludge, suspended flocs and organic macromolecules are blocked outside the membrane filament. Timely aeration scrubbing with compressed air removes sludge dirt accumulated on membrane surface, maintain stable water flux of this PVDF MBR module for long-term continuous sewage operation without frequent shutdown cleaning.

Standard Performance Parameters

• Membrane Raw Material: Modified hydrophilic PVDF hollow fiber

• Nominal Filtration Precision: 0.1μm

• Operation Mode: Submerged negative pressure suction

• Max Transmembrane Pressure: 0.05MPa

• Allowable Cleaning Agent: 5000ppm sodium hypochlorite

• Standard Module Sizes: LF-LM10 / LF-LM15 / LF-LM20

Each set of sewage ultrafiltration membrane completes filament tensile and flux stability test before delivery, modular combined design freely spliced for different scale sewage treatment tanks.

Four Core Product Advantages

1 High Toughness PVDF Filament
Thick hollow fiber of MBR UF membrane resists aeration scouring, low breakage rate in high sludge MBR tank.

2 Strong Oxidation Resistance
Tolerate high-concentration sodium hypochlorite online cleaning, effectively remove biological fouling of the PVDF MBR module.

3 Permanent Hydrophilic Modification
Not easy to adsorb organic sludge, aeration self-cleaning effect is remarkable, reduce cleaning frequency.

4 Modular Combination Design
Single module fixed membrane area, freely combined for small and large municipal sewage stations.

Main Application Fields

LF-LM wastewater treatment filter is core membrane component of municipal domestic sewage plants, printing and dyeing wastewater recycling projects, chemical factory sewage zero-discharge systems and food industry wastewater treatment. The clear water after MBR filtration can be further processed by RO membrane element to reach industrial reuse standard, and can be combined with Oil & Gas Purification Equipment waste gas filter for factory comprehensive environmental protection treatment.

Full LF-LM MBR Membrane Complete Model List

LF-LM10, LF-LM15, LF-LM20

Other Related Products

PVDF External Pressure UF Membrane Module

FAQ About LF-LM MBR UF Membrane

Q1 What operation mode does LF-LM MBR membrane adopt?
A1 This MBR UF membrane is submerged negative pressure suction type, installed inside biochemical sewage tank.

Q2 Can this PVDF membrane use sodium hypochlorite to clean?
A2 Yes, modified PVDF material can withstand high-concentration NaClO online chemical cleaning to remove biofouling.

Q3 What sewage is LF-LM suitable for?
A3 Mainly for municipal domestic sewage, printing dyeing wastewater, chemical and food processing sewage MBR biochemical tank.

Q4 Why choose MBR membrane instead of conventional UF?
A4 Submerged negative pressure design adapts high sludge concentration biochemical pool, no need large pre-filtration equipment compared with external pressure Ultrafiltration membrane.