Products/Processes that can be offered from the discipline to be marketed
Aqua desalin ED domestic Unit
The Institute has developed domestic ED unit to desalinate brackish water to obtain potable water required for domestic purpose. This newly developed unit treats about 3,000 ppm or less TDS brackish water and gives potable water of 500 ppm total dissolved solids at an estimated rate of around 10 - 12LPH/50 -60 LPH . The power consumption would be of 2.0 - 2.5 KWH per cubic meter of product water. An inbuilt ozonator is incorporated in this unit to destroy the pathogen to make the product water safe for drinking.
The institute has also developed a continuous electro deionization (CEDI) system for the production of ultra pure water/high purity water.. This unit could produce water having a resistivity up to 18.2 mega Ώ cm at a capacity of 12 lit/hr. This Product was developed using indigenously developed interpolymer ion exchange membranes.
Organic-inorganic nanocomposite (based on PVA-SiO2) membranes were developed by sol-gel process under acidic conditions. The nano-structured organic-inorganic hybrid materials are currently the objects of intensive research, because they combine in a single solid both the attractive properties of a mechanically and thermally stable inorganic backbone and the specific chemical reactivity and flexibility of the organo-functional group. Organic-inorganic hybrid membranes, with acidic (–SO3H, –PO3H2, and –COOH) functional groups and basic (-N+(CH3)3Cl–) functionality, were prepared as cation- and anion-exchange membrane. Properties of the developed membranes were largely dependent on the way of preparation (catalyst, temperature, and crosslinking) and the functional groups attached with inorganic as well organic moieties. It was found that phosphonic acid functionalized membranes showed long range of conductivity over a wide temperature while sulphonic acid functionalized membranes showed deterioration in conductivity at higher temperature. This was concluded on the basis of degradation of the functionality at higher temperature. The physicochemical and electrochemical properties of the developed membranes were found to be comparable with best commercially available membrane (viz. Nafion and Neosepta etc) for energy and electro-membrane devices.
EMP division has developed easy method for the preparation of heterogeneous–homogeneous composite BPM. Single cationic layer of sulphonated poly(ether ether ketone)was prepared by casting and evaporation. After the solidification of first layer, the next layer was casted onto the surface of the former, which then was allowed to dry. This procedure was repeated for cationic, interfacial and anionic layers. Because all polymer solutions were prepared in the same solvent and the contact at the interface layers was firm. These membranes exhibited low water content and resistivity, while high ion-exchange capacity. The efficiency of the developed membrane was assessed for water and salt splitting.
Interaction with industries for effluent treatment & for separation, purification & concentration of chemicals
Hybrid ED-RO technology for the desalination of sea water desalination for the production of drinking water • CEDI system for the production of ultra pure water/high purity water.