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sustainable management of impure water

UN SDG Category : Clean Water and Sanitation
Innovator : Samayly.S, S.Kesava priya, T.Ashifa, A.Vigneshwar
Project Guide: Dr. T Vigneswari
Institution : Sri Manakula Vinayagar Engineering College

Donations are tax deductible u/s 80G

Problem Statement
The water scarcity problem is one of the most serious risks facing the world at every level: social, economic, political and environmental.Drinking water could be terribly precious for all people as water utilities face more challenges.It is already manifesting itself as a problem in parts of the world, emphasizing the need to manage the natural resources in a sustainable way with the appropriate infrastructure.Although water covers 71% of the Earth’s surface, only 4% is freshwater and only 0.5% of this water is suitable for human consumption,according to the U.N. More than 2.1 billion people still lack access to safely managed drinking water.Many people have tried their best to give wonderful solution to purify available water resource and make them edible.But many failed due to cost, reliability and flexibility. To overcome this scenario we have given a better solution.

There are various ways to purify the water like Filtration,Distillation,Chlorination. Some of the existing technologies such as activated alumina, or high O&M cost, such as coagulation & precipitation but the capital cost is very high which is not affordable for the common we came with an innovative idea which is Socially appropriate and available locally thus more reliable and sustainable than imported materials such as chlorine solution or iron chloride. Moreover, we have concentrated on removing arsenic from water along with other harmful pathogens. The proposed filter design consists of a concrete biosand filter with added iron filings on top of the diffuser. Raw water with arsenic and pathogen contamination is poured into the filter. Water percolates through the iron filings. Some iron is dissolved in the water as a result. Then, the dissolved iron forms precipitates upon contact with air. Iron precipitates are excellent adsorbent for arsenic. The iron precipitates are trapped on top of the fine sand layer. Arsenic is thus removed from the water. The pathogens contaminated water then passes through the fine sand layer. The fine sand layer contains a biofilm, which removes the pathogens from the water. The arsenic-free and pathogen-free water can then be collected at the tap The combined treatment system saves time and effort over two separate treatment is also safe because the treated water can meet WHO water quality guidelines for arsenic,pathogens,iron,turbidity.Other

The construction cost is very low, and the operation and maintanence(O&M) cost is minimal thus highly affordable to the rural creates a valuable local employment.since it is a simple set up operation it can be easily setup by women and children who perform most of the water duties.the people in the villages are also much benefited because it is User-Friendly.The filter is designed for intermittent use instead of continuous use.this is convenient for household use. The major benefit of this model is removal of arsenic from water which would save innocent people from cancer in the skin, lungs, bladder and kidney caused due to Long-term exposure of arsenic in water.

The construction of the combined-filter is simple. it combines the strength of existing technologies while minimizing their weakness .During its use, almost no maintenance is required. The iron filings can last for years. The biofilm will continue to be active as long as the filter is used. The plastic pipe and concrete may need inspection for cracks and leaks. This is a simple technique sufficient to provide pure water for household’s daily cooking and drinking needs This high flow rate is very favorable compared to many current technologies, such as ceramic filter, which has a flow rate of about 1-2L/day

India's Sustainable Development
It creates a valuable local employment.This not only eliminates hassles to the people, but also eliminates the risk of these additional items not available. • No energy requirement. Can be operated everywhere. It is particularly important for many rural areas where electricity is unavailable and fuel is not widely available. • The construction cost is very low, and the operation and maintenance (O&M) cost is minimal.


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