Council of Scientific and Industrial Research

Nagendra Pathak

Pushpito Kumar Ghosh

Sohan Lal Daga

Alamuru Venkata Rami Reddy

Paramita Ray

Jitendra Jaydevprasad Trivedi

Gaurang Shambuprasad Trivedi

Virendra Jayantilal Shah

Jewrajka Suresh Kumar

Saha Nirmal Kumar

Temubha Bhupatsinh Gohil

Sanat Natubhai Patel

Rahul Shubhash Patil

The present invention relates to a complete process for preparation of high flux and salt rejection thin film composite (TFC) reverse osmosis (RO) membrane including process for preparation of support membrane for thin film, process for thin film coating of support membrane by in-situ interfacial polymerization between diamines and trimesoyl chloride, machine design, chemistry and details of process (engineering+chemistry+ambient) parameter at 1&#xd7;100 sqm scale upgradeable to a scale even 10-20 times higher. The produced membrane is characterized by 96% salt rejection and 48 LM-2H 1 flux with 2000 ppm sodium chloride solution at 250 psi pressure and 95% salt rejection and 46 LM2H 1 flux with 35000 ppm sodium chloride solution at 900 psi pressure. The present invention also relates to complete machine design for PSF ultrafiltration membrane casting and coating for TFC membrane production at commercial level.

Modified thin film composite reverse osmosis membrane and a process for preparation thereof

This invention provides animal powered mechanical device for water desalination. It has unique features of using animal power as prime mover to effect brackish water desalination. Animal energy in form of high-torque low-speed can be converted into low-torque high-speed through speed increaser () to energize the high-pressure pump (), the outlet manifold () of the pump () being connected to a reverse osmosis membrane module (). With this device animal power can be used for obtaining safe drinking water from backish ground water/seawater resource in villages.

Animal powered mechanical device for water desalination

Growing community of inventors

Bhavnagar, India

Nagendra Pathak