User:Tanvay Shinde

As we all know importance of water ,water is most important substance on the earth there are many techniques to produce and extract water .For example Desalination and reverse water gas reaction.Desalination and reverse water gas reaction are expensive.Being an engineer,Tanvay Shinde and Saurabh Deshpande conducted research on extraction of water from air using hygroscopic element and performed the experiment 15-20 times using trial error method and were successful.Tanvay Shinde and Saurbh Deshpande conducted this experiment in month of February 2016 under the guidance of DR.Parag Sutar and DR. S.J.Purohit(HOD-chemical) .Tanvay Shinde and Saurabh Deshpande both are in Third Year pursing Chemical engineering from Thadomal Shahani engineering college Bandra Mumbai,India. As desalination and reverse water gas reaction is costly it is necessary to find some alternative way to produce water, water can be extracted from air using hygroscopic element at the cheaper rate.Hygroscopic elements are those elements which have tendency to adsorb and absorb moisture from air and when external parameter are added they give out moisture in form of vapours.Experiment was conducted in MTO lab,instruments use were heater,coolant,vaccum pump and condenser. PROCEDURE- Hygroscopic element use was activated alumina.The activated alumina was exposed normally to air for two hours it was observer that actiavted alumina which were 3mm in size after adsorbing moisture from air their size increased to 6mm.Then these activated alumina balls were place in vaccum oven and heated to 220 degree celcius. After reaching the temperature of about 220 degree activated alumina balls started to release vapours and these vapours were condensed by using condenser and water which was extracted was collected in beaker. CALCULATIONS- Flow rate of coolant : 1.30 lpm Amount of hygroscopic element use : 1kg Temperature of vacuum oven : 200deg C Pressure used in Vacuum Pump: 560 mm of Hg.

We got 300 ml of water from air when water sample was tested following results were obtain

Ph value = 8.0, Hardness by EDTA method=170ppm(using EBT as indicator) Turbidity=3.1, Colour=Transparent, Odour=odourless, These values are very near to the drinking water and hence the water obtain by using hygroscopic element was fit to use Problems- This method depends on Relative humidity,RH is the ratio of actual vapour density to that to saturated vapour density.Only problem we faced while performing the experiment was change in RH in different areas.Many research are in progress such as nano technology and use of solar energy to minimize the cost for production of water.If future prospects are met,with this method 1ltr of water will cost around 25rs. This method is one of better way to replace desalination since desalination is costly and after treatment brine which is formed is hazardous to marine system.Use of Solar collectors are in progress which can reduce electricity charge. According to this method production cost is 1ltr/25rs.This method requires area of about 100 sqft which is very less as compared to desalination and even cost required is low.With this method many water problem may be solve.