Best Ideas 2019 features all the nominated entries submitted under ‘Submit your Idea’ category. All the entries consist of innovative solutions or propositions for an enterprise that champions the Sustainable Development Goals. They can be on the conceptual, planning, or start-up stage.
DESIGN & FABRICATION OF CONCENTRATED SOLAR-GEOTHERMAL WASTE WATER TREATMENT APPARATUS
Explain your idea in details:
The apparatus essentially consists of 2 cylindrical water containers of 30 L/1000 L capacity, one which is installed above the surface and the other, underground. The receiver or the water container installed above the ground will be surrounded with four Fresnel mirrors with a definite concentrating factor in its periphery. The Fresnel mirrors will enable sufficient transfer of irradiation heat flux by solar concentration on the container walls. The solar irradiation will result in the rise of temperature of the body. At 10% efficiency of the mirrors, the total temperature rise will be around 433 K. This rise in temperature finds its use in waste water treatment/desalination process. The waste water treatment process will be carried on by evaporating the water into steam. This high temperature, high velocity steam will then be passed on to another container installed 0.5 m below the ground where the ambient temperature of the soil would be around 12 degree Celsius. The steam passing on into the underground container will be at a temperature of around 100 degree Celsius. The temperature difference thus achieved, i.e, around 88 degrees Celsius will be utilised here for condensing the steam into water, thus making the underground container act like a geothermal heat sink. The effective loss of heat by the steam into the soil will allow it to condense into water. The water thus condensed will be served later for irrigation or for use in commercial purpose. All the materials used for the manufacture of the 2 containers and pipe are anti-corrosive and would require very little maintenance. Post-condensation process would require a 1HP solar powered water pump to discharge the freshwater condensate from the underground container for further distribution purposes in the use of commercial or irrigation.
Expected impact of your idea on sustainable development
1. 100% renewable 2. Almost zero Carbon Footprint 3. 80 to 85 percent decrease in installment cost 4. 70% increase in the freshwater production per day in contrast with the present waste-water technologies or facilities 5. The flexibility of increasing the storage of waste-water to be treated which means the rate of production can increase with the same production efficiency (i.e, the storage can be 2000, 3000, 4000,.., 10,000 liters instead of 1000 liters). 6. Explicit automation for the Fresnel mirrors has been done for the light tracking as well as the light focus sensing over the housing of the wastewater. Present Desalination or wastewater treatment facilities produce around 300 liters of fresh water per day whereas the proposed project can produce up to 1000 liters of freshwater within just 12 hours of operation with a 1000 liter water vessel. The capacity of waste-water housing can increase and still produce the best water production rate. CSP technology is in use in some countries. but meshing it with geothermal is a completely new approach that has been adopted for designing the apparatus.
Plans for implementation and sustainability
The apparatus can be first installed in the commercial sector with a total capacity of around 300 Litres and then, it can be expanded to 1000 L or 3000 L and so on. Since it provides a much better efficient model than the present wastewater treatment facilities, the proposed model shall be a major boost to the wastewater treatment facilities as it will not only optimize the freshwater production rate but will also increment the chances of having a zero Carbon Footprint plant or apparatus. The stakeholders or the market of supply shall be the global market in the field of HVAC&R, WTP, Agricultural and Commerical Sectors. It has been inferred from a recent study by KEN Research that India has a CAGR of above 11 percent in the global wastewater revenue sector. The revenue generated is only by treating 25 percent of the total wastewater generated in this country. The percentage shows that it is fairly very low in terms of freshwater production and the root cause are the improper, non-efficient & non-renewable treatment methods. This clearly shows that the global market is in a desperate need for an innovation that shall increase the productivity being in-line with the renewable sector. Water, as we know is required in all the sectors and it has been found out experimentally from the chemical treatment of sample that indicates its probability of using it as also a portable source for the different industrial sector. Water Act 2003 and ASHRAE Standards have been followed while designing the apparatus and also in checking whether the results are satisfactory or not. The cost of this implementation is reduced to almost 80 to 85 percent for a capacity of 1000 L in comparison with the present technologies in the field of wastewater treatment.
Mr. Samarpan Deb Majumder is a pre-final year (aged 21) Mechanical Engineering Undergraduate pursuing his B.Tech in Institute of Engineering & Management, Kolkata, India. He has over 20 awards and honors in various competitions across the globe. Among his notable achievements, due to his expertise in the field of Aerospace Technology, he was appointed as the youngest Journal Reviewer for an International Conference hosted by American Society of Mechanical Engineers (ASME) and is also currently serving as a journal reviewer of another International Journal. Recently, he has been the Gold Medallist at the World Invention Innovation Contest 2019 held at Korea.