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Membrane Process
Membrane Process can remove a wide variety of particulate and suspended impurities from fluid streams. The membrane process described below are driven by pressure. The membranes employed in these processes have porosity and surface characteristics modified, which allow them to reject target impurities in the feed water to produce a product that meets the desired specifications.
Reverse Osmosis (RO)
This process is well known for industrial water purification. RO membranes allow only the water to pass through them, thus removing salts and dissolved organics from the feed stream. However, careful control has to be exercised in treating the raw water thru the membranes in order to maximize their life. The operating pressure used for reverse osmosis is in the range of 20 - 60 bar.
Nano Filtration (NF)
This process has been developed recently and the membranes may be called "loose RO". Water and mono-valent ions pass through the membrane leaving behind di and multi valent ions, large organics and suspended mater contained in the feed stream. The operating pressure is usually in the range of 10 - 30 bar.
Micro Filtration (MF)
The Micro filtration process, is performed with membranes having pore size in the range of several microns to 0.1 micron. This process is used mainly to remove suspended matter from raw water. The operating pressure usually 0.1 - 3 bar.
LIMILETLESS DESIGN OPTIONS
Whatever be your water purification need, Membrane Technology has the technology, making design combinations virtually limitless. All systems are designed for ease of validation and system integration
Our ability to provide unique technical solutions through system design is a major reason customers choose Membrane Technology , and why they depend on us year after year.
Few examples where our modules Ultra Filtration membrane is working in a Commercial Plant / Pilot Plant provided our technology.
Chennai Petroleum Corporation
Madras Fertilizers Ltd.,
O'Donnell Griffin,
Australia MWD, South Africa
An Ultra-Filtration system consists of the membrane modules, the ancillary pumps and piping, and controls. The Systems offered by Membrane Technology can be easily automated to any extent for easy operation. These systems require negligible maintenance as they are designed for rugged operation. The membranes have to be periodically backwashed and cleaned, which is often inbuilt in the system for automatic operation.
Ultra-Filtration systems can be operated in a "full-flow" or cross flow mode. Our team of engineers has been trained for selection of different modes suited for a spectrum of applications. Full flow operation requires frequent backwashing and is recommended normally for clean feed stream water. This mode of operation is preferred due to lower power consumption. However, most raw water stream require the system to be operated in a cross-flow mode, so that stable filtration rates are maintained.
                    
Full Flow Filtration
100 % water recovery
Similar to normal filtration
Requires frequent backwashing

 
Cross Flow Filtration
Raw water recirculated
Recovery < 100%
High volumetric capacity for pump
Reduced frequency of backwashing
Cleaning Profile of U.F. System
Full-fledged in house Quality Assurance Department.
Equipped with sophisticated equipment to ensure high standards of workmanship, product quality to match the challenging demands of the industry.
All Quality assurance and procedures strictly followed to ASTM specifications.
Quality assurance maintained from Design, Drawing, Material Inspection, Testing and all stages of manufacture, up to product testing.
Quality Control Engineers and Inspectors are NDE - ASNT Level II qualified, in PT, MT, RT, UT methods.
24 hours hotline
System Trouble Shooting
Installation & System Upgrades
Preventive & Emergency Maintenance
Media & Filter Replacement
System / Membrane Sanitization & Cleaning
Water Sampling & Analysis
Field Engineering & Evaluation
1. Refinery Plant
Overview of the Refinery Plant
Overview of UF Pilot Plant at Refinery
2. Fertiliser Plant
Operating Results in Fertiliser Plant on Municipal Wastewater
Description
UF Feed Water Quality
UF Permeate Outlet Water Quality
% Reduction
T.S.S.
72
Nil
100 %
Iron
0.04
Nil
100 %
Dissolved
0.4
Silica ppm
9
9
--
COD ppm
58.88
33.12
58 %
BOD ppm
13.2
3.8
71 %
MPN
Nil
Nil
100 %
TCI
28
8
--
SDI
> 6
0.975
85 %
Turbidity
2.405
0.115
96 %
Overview of UF Pilot Plant at a Fertilizer Plant
Operating Results - Fertiliser Plant Feed: Cooling Tower blow-down
Sl.No.
Parameters
UF Feed
UF Permeate
% Reduction
1.
Turbidity, NTU
2.2
0.1
95.45 %
2.
SDI
>6
0.2
96.60 %
3.
Iron
0.1
Nil
100 %
4.
COD
36
9
75 %
5.
BOD
1
0.25
75%
3. Mine Process Waste
Feedback from our Australian Customer
Application - Mining Process Waste
Results from our Australian Customer
The Ultra filtration membranes were tested
in three type of feed water quality.
 
Overview of Mining Process Waste Treatment Plant
High Algae (SDI 15)
High Collaids (SDI 13)
Low Collaids (SDI 3)
The system was operated at 50 LMH on high algae water. The product SDI is less than 1. We use combination of air scour and backwash with permeate. Overview of Mining Process Waste
4. Europe-Rain Water Harvest
Results from our European Customer
We have tested the air-scour element on a rain-water harvesting application. The results are as follows:
SDI - Feed 25
SDI - Product 0.1
Filtration Rate 2.5 m3/ hr
Pressure 0.3 - 0.5 bar
Temperature 15°C
The product is used as de-ionised water for production.
“WE THINK THE RESULTS ARE EXCELLENT. BRAVO FOR MTL”
5. Sea-Water - Pre-treatment to Reverse Osmosis
Application :
As a pre-treatment in desalination of water Reverse Osmosis.
Operating Pressure : 0.25– 0.7 kg/cm2
Operating Temperature: Ambient operated on both cross flow and full flow mode feed TSS : 70 ppm
UF product TSS : 0.54 ppm
Advantages :
Reduction in the total suspended solids, thus reducing the fouling rate in the RO membrane used for desalination.
UF has the capability to eliminate micro-organism. Hence, fouling due to micro-organism is also reduced in the RO membranes.
6. Chlor-Alkali Industry
Application of U.F. Membrane for the Purification of Brine
Configuration : Hollow Fiber Overview of
the Chlor Alkali Plant
Operating temperature : 58°C
Operating pressure : 0.63 kg/cm2
Filtration Rate : 65 lmh
Suspended Solids in Feed : 2.8 ppm
Suspended Solids After Filtration : 0.45 ppm
   
Overview of the
Chlor Alkali Plant
Advantages
  1. Ultra-filtration is used for the removal of suspended solids in brine stream.
  2. The conventional anthracite and alpha-cellulose filter is eliminated.
  3. The quality of brine is consistent and the removal of suspended solids is more effective.
  4. On the long run, due to consistent quality of the feed brine with respect to suspended solids , the life of the resins and ion-exchange membranes are expected to increase.
  5. The effective removal of suspended solids aids in improving efficiency of the electrolysis, thereby reducing the overall cost of production.
7. Sugar Industry
Application of Ultra-filtration Membrane for the Clarification of Sugarcane Juice
  • Purity of sugar increased ranging from 0.2 to 1 % of solids
  • Condensate water from Evaporators can be reclaimed for cooling tower make up.
  • Condensate treated with chemicals and passed through UF to remove suspended solids.
  • All organic contaminants removed.
Advantages
  • Saving in water consumption
  • Saving in cooling tower water treatment chemicals
  • Reduction of load to the effluent treatment plant
Applications: Clarification of sugar cane juice
Condensate water reclaimed for :
Cooling tower make
Feed to the high pressure boiler.
UF Under Operation-Pretreatment for RO and Clarification of Sugar Cane Juice
Analysis of UF Product
8. Paper Industry
Application as a Pre-treatment Step
In the treatment of Pulp Mill Effluent
PULP MILL EFFLUENTS
Operating Feed Water Pressure : 0.6 kg/cm2
Operating Temperature : 34°C
System Recovery : 89.8 %
Advantages
PULP MILL EFFLUENTS
Separates out suspended colloidal pulp from the effluent stream imparting a clear treated effluent for further processing by NF & RO membranes.
The efficiency of NF and RO stage is greatly enhanced due to better quality from ultra-filtration.
No addition of chemical or coagulant or precipitation of suspended particles.