Submerged filtration Core technologies


Submerged membrane filtration (SMF) technology is a new type of membrane technology. It is a new type of membrane filtration process in which ultra-low-pressure hollow-fiber membrane technology and continuous membrane filtration technology are combined together. It uses open-ended hollow fiber membrane elements, which put the membrane directly into the membrane tank that  is full of water, then go through the vacuum suction pump, use  atmospheric pressure, so that the surface water can  go through the membrane, get out from the inside, and the purpose of purification is achieved.
The  daily treatment capacity of the single membrane tank can reach more than 10,000 tons. The combination of more than one membrane and backwash operation can be adapted to different water conditions and scale, so that the control system of water treatment can be greatly simplified, and  the reliability is greatly improved. It is especially suited for large-scale water treatment work.
The technology can help hollow fiber membrane achieve on-line cleaning and online chemical enhancement cleaning, the elimination of membrane fouling and an effective restoration of membrane flux.The technology can achieve integral online test for the membrane. No matter when you have any problem  with membrane, it can be judged quickly and accurately, and can be easily isolated  and replace the membrane.
Submerged membrane filtration (SMF) technology is a research result from MOTIMO after many years’s  research of ultra-low-pressure membrane filter technology, development and  the accumulated experience  of practical application.It is an international advanced technology after the birth of CMF, MBR, TWF. Tianjin MOTIMO Membrane Technology CO.,Ltd. has the integral intellectual property rights on  technique.



Raw water


municipal sewage treatment and re-use

STP second class producing water

Landscape, irrigation, industrial production, toilet flushing and vehicles cleaning water

Deep treatment and re-use of Industrial waste water

STP second class producing water Circulating and cooling industrial water

Make industry process water process water cooling circulating water etc.

Industrial water treatment

Ground water or surface water

Make industry process water


Sea water and other water needing desalination

Sea water desalination, pure water, hyperpure water, desalted water for industrial process etc.

Supply processing

Ground water or surface water

Municipal water supply treatment

Residential water and commerce water treatment

Tap water

Drinking water purification


PVDF has the capability of high anti-pollution ,anti-oxidation and fouling resistance with high flux and a stable effluent, it is easy to wash and has a long service life
Equipment is easy to control and the system operates automatically that can also be controlled remotely
Unique online air-water backwashing methology, excellent recovery rate of flux, lower self-expense water cost
Compact structure, suitable for the large-scale water treatment project
Apply specifically to transformation or extension, the original filter tank with membrane method, enhancing the processing scale and water quality
Generate Product water under negative suction pressure, operate with ultra-low pressure, saving  electrical energy
Commonly industrial dosing device can be used to wash the system, saving O&Mcosts
  high water quality, high water recovery rate, effective water-saving

 SMF System Process


To eliminate the membrane pollution, renew membrane flux, after running for some periods, it needs CEB or CIP chemical cleaning.

pretreatment system

fine grating

backwash system

Backwash pump,backwash tank

water supply system

water supply trench

gas supply system.

air compressor, air reservoir

membrane unit system

membrane module, membrane frames

Dosing system

Dosing pump, dosing tank

permeate system

Permeate pump , permeatetank

Cleaning system

chemical,cleaning pump, cleaning tank

backwash system

wastewater tank

Control systems

PLC control cabinet

 Engineer Application & Reprsentative Cases:




Raw water

Scale T/D


A reclaimed water plant


Municipal second producing water


Domestic water

An industrial park in Tianjin


Municipal second producing water


Park water

 We Can Provide For Users:
• SMF technical advice
• SMF application engineering design
• SMF membrane equipment’s processing and manufacturing
• SMF application engineering construction, equipment installation and debugging
• SMF system operation and management and after-sales service