SEWAGE WATER TREATMENT TECHNOLOGY – ST- MBR

 

  We are introducing latest technology for " STP " . the subject above and are pleased to submit herewith our details for
  your kind consideration:

  Introduction – ST MBR Technology ,

  ST- MBR ( Moving Brio- Reactor ) can be broadly defined as systems integrating biological degradation of waste products
  with modules filtration.

  Set up of MBR plant is mainly utilizing a bioreactor and M.modules filtration as one unit process for wastewater treatment thereby replacing,
  and in some cases supplementing, the solids separation function of secondary clarification and effluent filtration, resulting the possibility to
  eliminate the secondary clarification and operate at higher MLSS concentration.

  In summary, the ST- MBR system is the combination of traditional Actitived Sludge Treatment with the membrane technology.
  The design criteria of the system shall be base according to the traditional way of Activated Sludge Treatment principle.
  However, on top of that, the MBR modules are immersed and located in the air blow tank/ aeration basin (biological reactor tank), the clear water
  is pumped(sucked) out from the MBR modules. This shall possibly eliminate the needs of secondary clarifier. Refer Diagram 1.

Advantages of the ST- MBR:

à ( Clean & safe operation at the Lowest Total Cost of Ownership

Better control of biological activity & Low Energy < 0.25 Kwh/m3

Effluent that is free of bacteria and pathogens

Smaller plant size / Occupies only 30 ~ 40% less area compared to Conventional ( STP ) process .. and Highest Permeate Quality .

Easy clean & Dry system set- up: Out side Biorector

Biodegradation efficiency enhanced 10%~30%

Short Hydraulic Residence Time (HRT) & Long Sludge Residence Time (SRT)

Activated sludge increase by 2~3 times

No secondary settling and disinfecting tank required

Higher organic loading rates and Low Civil work Cost per M3.

 

 Sewerage Treatment Plant – Forecasted Result & Suggested Treatment Flow

 

Item

CODcr (mg/l)

BOD5 (mg/l)

SS (mg/l)

NH-N3 (mg/l)

Influent

< 400

< 400

< 250

< 50

Effluent

< 10

< 4

< 10

< 10

Parameter

▪1 HRT

4 ~ 6 hr

▪2 DO of ST-MBR Tank

3 ~ 4 mg/l

▪3 MLSS of MBR Tank

6000 ~ 8000 mg/l

 

 

 

 

 

 

 

 

 

Specification – Model : ST- MBR-1000

 

 

Material : Polypropylene

Capillary Thickness : 40 ~ 50 µm

Capillary Outer Diameter : 450 µm

Capillary Pore Diameter : 0.01 ~ 0.2 µm

Gas permeation : 7.0 x 10-2 cm3/cm2 • S • cmHg

Porosity : 40 ~ 50%

Lengthways strength : 120,000 kPa

Designed flux : 6 ~ 9 L/M2/H

Area of membrane module : 8 m2/module

Operating Pressure : -10 ~ -30 kPa

Flow-rate : 1.0 ~ 1.2 m3/ day

 # Our general recommendation only and subject to final recommendation from consulting engineers #

 

 

 

 

 

 

 

 

 

 

 

 In the reactor tank, the ST-MBR modules are fixed on a modular frame network. Below the ST- MBR modules, there are these air-diffusers.
 The vacuum pump connect with the ST- MBR modules. .......The ST-MBR modules are submerged in the waste- water.

 Maintenance & Operation ,

 Prevention Pollution of ST- MBR module

 Pollution of ST-MBR module is ineluctable in project. But we would prevent the pollution in effective ways such as resume the flowrate by cleaning.
 The pollution of ST- MBR has many reasons in the following:

In the system of waste-water treatment, the aerobic germs are easy to propagate in membrane because of the compatible temperature, oxygen
and alimentation.

Organic compound in imperfection treatment and inorganic ion cannot be treated accumulate on the external of m.modules .

Activated sludge adheres to the external of membrane.

Concentration polarization comes into being pollution.

 We suggest to use aeration treatment under the m.modules system. Aeration treatment would bring air bladder. Acted with the stagger action of air
 bladder and water, the membrane would have the dithering and to be scrubbed away the dirt/ sludge. At the same time, make the suction pump working
 in intermittent. The suction pump shall be run for 13mins and stop for 2mins in order to prevent the pollution and the barrage of membrane. The vacuum
 pressure meter is used in order to keep operation negative pressure in 100~300 kPa when the system in operation.

 

 

 

 

Cleaning treatment of ST- MBR module

 When the operation negative pressure exceeds 0.05MPa, ST-MBR module need to be cleaned in time. You may clean in the following flow in order to
 make the membrane resumed adequately.

Dismantle and remove the ST- MBR module from the installation frame. Rinse the surface of ST-MBR module with clean water in order to wipe
off the contamination on the surface of m. modules such as the activated sludge.

Immerse the ST- MBR module in sodium hydroxide (NaOH) solution with 5% concentration for 2~3hours in order to remove the organic compound
and the colloid material on the surface of membrane.

Then, immerse the ST- MBR module in sodium hypochlorite (NaClO) solution with 0.5% concentration for ½ ~1 hour in order to disinfect the
micro-organism on the surface of membrane.