1.Introduction:
MBR membrance biological technology is a new kind of high efficiency technics which combine biological treatment and membrance separation, which has widely attention in international.adopting aerobic microbial in reactor degradation organic pollutant in sewage and nitrobacteria in reactor transform ammonia nitrogen in the sewage to remove the abnormal taste in sewage, the bioreactor technics greatly strengthen bioreactor function by MBR membrance separation. Comparing with traditional biological treatment method, with high Biochemical efficiency, Resistance to impact load ability, outlet water quality steady, small occupy area, long spoil disposal period, which was wide used in treating municipal sewage, ship domestic sewage, industrial sewage etc.
2.Working Principle

  Integrated MBR technics is organic combination of sewage biological treatment and membrance separation. The sewage in

reactor finish organic pollutant decomposition and transformation, finish sewage solid –liquid separation by using high efficiency separation of MF(micro filter membrance ) or UF( ultra filtration membrance), thus achieve the final purification effect. The membrance modules can fully replace second settling tank,convention filtration and adsorption unit in traditional technics, make water power retention time and SRT fully separation, get steady and superior outlet water quality.

Its basic structure and processing is as follows:

Main treatment unit 
 (1) Front pretreatment tank:

In front of this device is anoxia tank, in one end of anoxia tank set water inlet, another side top set water weir tank and outlet water, can make the sewage stable nature flow into membrane reaction tank, equip floating packing and anoxia sludge, the sludge in anoxia tank HRT is 3-8h, give oxygen by interval, to make acidify,nitration and denitrification function, make the organism gradate translate into inorganics remove.  
 (2)MBR bio-reaction tank:

It has set water inlet in one side, and the immersed flat membrane module set in reaction tank, accommodate activated sludge, around aeration and membrane unit aeration pipeline connect with air blower, the matched collecting pipe in membrane module connect with suction pump, the untreated sewage enter into MBR biochemical reaction tank by water inlet, sewage HRT is 5h in reaction tank.  After degrade by activated sludge in reaction tank, by resistance pollutant flat membrane module, then enter into cleaning water disinfection tank by suction pump. There set sludge lifting pump in aeration, it can lift the surplus sludge to sludge digestion tank interior; there has overflow in reaction tank top, it can make the sewage backflow into tank outside equalize tank; in below side open vent , in order to convenient for tank interior maintenance, cleaning.
 (3) Sludge tank:

there are set sludge collecting hopper and sludge pipeline in sludge tank bottom, in order to convenient for sludge concentration, set weir water tank in top, there open mud discharge inlet in bottom, rely on static pressure automatic discharge mud.
(4)Cleaning water tank: 

(5) Operation room: 

 It set 2 pcs air blower in operation room, operate 12h automatic shift 1 time, air blower equip with silencer damping measures; suction pump 2pcs, electric control cabinet 1pc, lighting system; in the top, equip with rain-proof air vent and ventilate convection device.

The above treatment unit integrated in a tank body, electric control cabinet automatic control each power plant operation.

Electric control parts:
  1,Equalize tank sewage lift pump:  1pc in operation, 1pc stand by;

Water pump equip with liquid level controller, high low liquid level automatic limit start, if over warning level, two pump will start meanwhile; higher liquid level, 1 pc pump in operation, lower liquid level, two pumps all stop,  in normal liquid level, 1pc pump in operation;
 2,Sludge pump: 1pc
3,Suction pump: 1pcs, According to MBR biochemical tank liquid level switch automatic operation, high liquid level normal operation.
 4,Air blower: 2pcs , 1pc in operation,1pc stand by, in normal condition, air blower is continuous operation condition, in order to increase service life, 2pcs alternate use, work 12h automatic switch.