The mentioned project is primarily related to water purification. It is an innovative, cost-effective method using high-voltage plasma from a low-voltage DC battery. Here are the key points:

Individual Use

Functionality: This small device can eliminate all microorganisms present in the water.

Impact: It will significantly reduce the incidence of waterborne diseases in flood-affected areas worldwide.

Accessibility: Equipped with a solar panel for charging, it is easily accessible in areas without electricity and does not require power generated from fossil fuels.

Cost: The device costs only $5.

Sustainability: Made entirely from electronic waste, it not only purifies water but also helps in preventing environmental pollution.

Industrial Application:

Functionality: When used on a larger scale in industrial wastewater treatment plants, it can effectively purify chemically contaminated and dye-laden water from factories.

Testing: This application has already been tested and proven effective.

The project aimed to address the salinity and arsenic contamination of water sources in Bangladesh through a solar-powered distillation system and activated carbon treatment. The study found that the treated water samples demonstrated significant improvements in various parameters, including pH, TDS, EC, DO, BOD, COD, salinity, and arsenic levels, making them safe for consumption. The solar-powered distillation system effectively removed impurities and dissolved solids, while the activated carbon treatment eliminated additional harmful substances. The system proved to be cost-effective, eco-friendly, and scalable, offering a promising solution to the global water crisis. By providing clean and safe drinking water, the project aimed to improve the health and well-being of affected communities and contribute to a sustainable future.

Oily-water problem is a rising problem with the rapid industrial and economic growth. Oily wastes are one of the major pollutants in the aquatic environment and are causing serious problems. The conventional methods such as skimming, siphoning, or burning, can be costly, take several days, and have less efficiency. Human hair can be utilized to deal with the oily water problem using the adsorption process. The purpose of this study was to introduce a system that could efficiently purify oily water by separating oil from the water.

Human hair can be modified into hair boom or mats to treat oily water. Animal furs or feathers which have the same properties as hair can also be used in this oily water treatment process along with the hair. In this study, the methods, efficiency, and mechanics of using human hair to clean up oil-contaminated water were reviewed. It was proved that human hair can adsorb more than 5 times its weight of oil. This method was able to successfully separate oil from the water by adsorption in a rapid time frame.

The water crisis in megacities like Dhaka intensifies as we don’t realize how much water we use or how much we waste.  The primary purpose of our work is to reduce water wastage so that we can conserve water resources. In our paper, we tried to develop an integrated system, which will help people track and predict their water usage habits to suggest more efficient behaviours which will be easy to implement as well so that it can be popularised in megacities. Moreover, the system includes an option to reuse greywater by recycling it to reduce unnecessary water usage and prevent wastage. As a result, the proposed system will help us to improve our water usage behaviours and conserve our limited resources. 

Bangladesh is currently undergoing some massive economic changes, and the river bodies are being affected by pollution. Unethical practices are not accounted and the rise in economic growth translates to more industries, which is good for the economy but bad for the water bodies.In the current system, in order to tackle such issues, people resort to many types of water purification measures. With about 63.37% of the total population living in rural areas and at a poverty rate of 24.3%, expensive purification means, like reverse osmosis, is not an option for them. We developed a method to carry out flocculation with Naturally produced poly-glutamic acid with Moringa olifera seeds, which are abundant in nature.

The major emphasis of this study was to develop rapid, portable and highly-effective water purification device via capacitive deionization for on-spot water remediation with minimal energy consumption. The single-pass filtration experiments conducted at 1.2 V through the gravitational force demonstrated that the electrode fabricated from PET carbon aerogels and mixed plastic carbon aerogels is superiorly efficient by eliminating approximately 100% and 93.53% of both NaCl and As (5+) contaminants ions across a wide range of feedstock concentrations (50-1000 ppm) respectively, where the reverse osmosis system was proven relatively ineffective. This interdisciplinary study opens numerous possibilities for generating potable and affordable water when the access to electrical power is inadequate with protecting the ecosystem from the consequences of thermoplastic debris problem.

The major emphasis of this study was to develop a rapid, portable and highly-effective water purification device via capacitive deionization for on-spot water remediation with minimal energy consumption. The single-pass filtration experiments conducted at 1.2 V through the gravitational force demonstrated that the electrode fabricated from PET carbon aerogels and mixed plastic carbon aerogels is superiorly efficient by eliminating approximately 100% and 93.53% of both NaCl and As (5+) contaminants ions across a wide range of feedstock concentrations (50-1000 ppm) respectively, where the reverse osmosis system was proven ineffective. This interdisciplinary study opens numerous possibilities for generating potable and affordable water when the access to electrical power is inadequate with protecting the ecosystem from the consequences of thermoplastic debris problem.

Purification of drinking water using coconut shell–based activated carbon (PDWCAC)