Membrane Bioreactor Technology 

Membrane Bioreactor Technology - MBR Membrane

Membrane Bioreactor Technology (MBR) is an efficient and most advanced technology for municipal and industrial wastewater. treatment process which combines high-efficiency membrane separation technology with conventional activated sludge process (CAS).

Membrane Bioreactor combines the advantages of membrane filtration and biological treatment technology. It uses a membrane module instead of a secondary sedimentation tank in conventional activated sludge process. The filtration membrane greatly improves the solid-liquid separation ability of the system, producing higher permeate water quality and volume. imemflo is one of the leading Membrane Bioreactor, MBR Manufacturer & Supplier

imemflo has two different variants

Based on a proprietary high-strength PVDF (Polyvinylidene fluoride) material, imemflo’s membranes have permanent hydrophilic properties. The hydrophilic properties will not be lost regardless of light exposure, drying, weather variations. PVDF exhibits superior physical strength and enhanced chemical stability.

imemflo Membrane Bioreactor Technology  Advantages

  • Higher permeate quality for discharge or reuse
  • No impact from feed water’s fluctuation
  • Longer sludge retention time (SRT): Less sludge
  • Reduced footprint - ½ to ¼ of a CAS plant.
  • High MLSS sludge concentrations (4 to 12 g/l)
  • Biological removal of ammonia by nitrification process
  • No clarifiers (no bulking and sludge rising problems)

imemflo Features

Dry storage, engineering installation and maintenance do not require hydrophilization pretreatment. Reduce the cost of transportation, operation & maintenance.

Uniform pore size ensures consistently high permeability with minimal clogging. Strong anti-fouling ability, and long service life.

Numerous small-diameter pores are distributed throughout the membrane surface with a narrow diameter distribution. With this unique asymmetric structure ensures higher treated water quality and minimizes fouling and clogging for consistently high water permeability.

Membrane Bioreactor Technology 

Treatment Process

Traditional Wastewater plant The imemflo is a fully self-contained Membrane Bioreactor wastewater treatment system incorporating the following process stages:
1. Inlet screening
2. Primary / Anoxic tank – DE nitrification
3. Aeration / Membrane Bioreactor tank -Nitrification
4. submerged membrane filtration modules
5. Permeate receiving and disinfection
6. RAS and sludge removal.

imemflo Membrane bioreactor (MBR) can best be described as one part of a biological process where small microbes degrade pollutants before being filtered by a collection of submerged membranes. Membranes are housed in modules that are, in turn, assembled into cassettes and installed in a tank (called an MBR). Air introduced through integral diffusers scours membrane surfaces during filtration, mixes the tank and provides oxygen to the biological process.

A growing body of research suggests that properly designed and operated Membrane bioreactor (MBR) systems offer several advantages over conventional technologies in terms of protecting public health and improving sustainability including but not limited to:

  • Use as pre-treatment for reverse osmosis (RO) systems
  • Improved removal of micro pollutants (micro constituents)
  • Reduced disinfection requirements

  • Flat sheet & Hollow fibre MBR (Membrane bioreactor) module
  • Up to 0.01μm Ultrafiltration membrane
  • Automatic cyclic membrane backwashand CIP System
  • Proven design
  • Fully Factory Tested
  • Standard Steel Modular construction
  • Compact and easy to transport
  • Minimum filed assembly.
  • Effluent Quality BOD < 5 TSS < 1 Turbidity < 1

  • Incorporate advance membrane technology.
  • Ideal for sites where water reuse is premium.
  • High removal efficiency for nitrogen, BOD & COD,
  • Fewer process to achieve comparable effluent quality.
  • Eliminate Sludge ability Issues.
  • Reduce sludge yield
  • High Quality Effluent
  • Small Foot Prints.

Waste water

  • Restaurant and kitchen waste water
  • Capacity increase
  • Plant modification and expansion
  • Toilet Flush, Landscape, Car Wash, Construction, Gardening etc.
  • (Below and Above Ground)
  • Apartment Buildings
  • IT Parks

All Commercial Establishments such as

  • Hospital
  • Hotels
  • Educational Institutions, etc
  • Decentralized STP in remote and hilly terrains.
  • Industrial Effluent Treatment for Recovery and Recycle:
  • Tanneries, Textile Dye and Bleaching Effluents,
  • Pharmaceutical, Chemical Process Industries,
  • Automobile and Engineering,
  • Food and Beverage

Note：For different water quality, there will be a different water flow rate. So the user should fully test the membrane module. This parameter is tested at 25℃,-10KPa suction vacuum conditions based on municipal wastewater.

The difference between the Membrane Bioreactor Technology and Continuous Aeration System (CAS)

Description

Input water

 Output water

Typical
 municipal wastewater

MBR

CAS

TURBIDITY (NTU)

--

Membrane filtration process

＜1 

5-20

SDI

--

＜3 

＞5 

TSS (mg/L)

100-300

＜1 

10-30

BOD5 (mg/L)

300

＜5 

＜ 30

COD (mg/L)

600

Biological process

＜ 30

＜ 100

NH3-N (mg/L)

30

＜ 0.5

5-10

TN (mg/L)

40

＜ 15

＞ 25

TP (mg/L)

10-20

＜ 0.5

5-8

Note:

  • The removal rate of BOD and COD is related with the biological treatment process.
  • The removal rate of NH3-N is different based on the degree of nitrification.
  • The removal rate of TN is different based on the degree of denitrification.
  • The removal of the phosphorus might need the chemical method.
The other comparisons of MBR and CAS
Description MBR CAS
Water quality Directly reusable, higher than national standard Meet national standard
Footprint About 1/3-1/2m2/(m3.d-1) About 1m2/(m3.d-1)
Construction investment RMB2000-2600/(m3.d-1) RMB1500-2000/(m3.d-1)
Operation cost RMB0.7-1.0/m3 <0.7RMB/m3 (Direct water discharge) <1.0RMB/m3 (Reclaimed water discharge)0
Excess sludge 1/3-1/5 of CAS Volume big, high processing cost
Operation management Few devices, simple flow process, easy to automatically control, stable operation and remote control feasible Many devices, complicate flow process, easy break down and high operation cost
Water applicationt Reclaimed water and water for industrial use Discharge on standard

Membrane Bioreactor Technology