Friday January 24, 2020

New Technology That Can Clean Water Twice As of Now

more than one in 10 people in the world lack basic drinking water access, and by 2025, half of the world's population will be living in water-stressed areas.

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Novel technology cleans water using bacteria

Researchers, led by one of Indian-origin, have developed a new technology that can clean water twice as fast as commercially available ultrafiltration membranes, an advance that brings hope for countries like India where clean drinking water is a big issue.

According to a team from the Washington University in St. Louis, more than one in 10 people in the world lack basic drinking water access, and by 2025, half of the world’s population will be living in water-stressed areas.

The team led by Srikanth Singamaneni, Professor at the varsity, developed an ultrafiltration membrane using graphene oxide and bacterial nanocellulose that they found to be highly efficient, long-lasting and environment-friendly.

The membrane technology purifies water while preventing biofouling, or build up of bacteria and other harmful micro-organisms that reduce the flow of water.

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The membrane technology purifies water while preventing biofouling. VOA

For the study, published in the journal Environmental Science and Technology, they used bacteria to build such filtering membranes.

The Gluconacetobacter hansenii bacteria is a sugary substance that forms cellulose nanofibres when in water.

The team then incorporated graphene oxide (GO) flakes into the bacterial nanocellulose while it was growing, essentially trapping GO in the membrane to make it stable and durable.

They exposed the membrane to E. coli bacteria, then shone light on the membrane’s surface.

After being irradiated with light for just three minutes, the E. coli bacteria died. The team determined that the membrane quickly heated to above the 70 degrees Celsius required to deteriorate the cell walls of E. coli bacteria.

While the bacteria are killed, the researchers had a pristine membrane with a high quality of nanocellulose fibres that was able to filter water twice as fast as commercially available ultrafiltration membranes under a high operating pressure.

When they did the same experiment on a membrane made from bacterial nanocellulose without the reduced GO, the E. coli bacteria stayed alive.

The new technology is capable of identifying and quantifying different kinds of cyanobacteria, or blue-green algae, as a threat to shut down water systems when it suddenly proliferates. Pixabay

While the researchers acknowledge that implementing this process in conventional reverse osmosis systems is taxing, they propose a spiral-wound module system, similar to a roll of towels.
Also Read: India Gets Assistance of Rs 3,420 Crore From Japan
It could be equipped with LEDs or a type of nanogenerator that harnesses mechanical energy from the fluid flow to produce light and heat, which would reduce the overall cost.

If the technique were to be scaled up to a large size, it could benefit many developing countries where clean water is scarce, the researchers noted. (IANS)

Next Story

Here Are Some Latest Details About Upcoming Apple iPhone 12

Recently, J.P. Morgan analyst Samik Chatterjee claimed that Apple will release a 5.4-inch iPhone, two 6.1-inch iPhones and one 6.7-inch iPhone with 5G connectivity in 2020

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Apple is preparing to release a new iPad Pro, a new MacBook and an augmented reality (AR) headset by the first half of 2020. Pixabay

Apple is expected to launch as many as four new iPhones spread across different display sizes in 2020 and now Apple analysts, Macotakara shared more details about the iPhone 12 design from a source from company’s supply chain in Asia.

The report claimed that the iPhone 12 will come in three size versions, including 5.4-inch, 6.1-inch, and 6.7-inch, but Apple will release two distinct 6.1-inch models, according to the source.

The 6.7-inch model will have a thickness around 7.4mm, which would be nearly 10 per cent thinner than the iPhone 11 Pro Max at 8.1mm.

Additionally, it also claims that the 6.7-inch model will be slightly taller than the iPhone 11 Pro Max and feature a triple-lens rear camera.

Recently, J.P. Morgan analyst Samik Chatterjee claimed that Apple will release a 5.4-inch iPhone, two 6.1-inch iPhones and one 6.7-inch iPhone with 5G connectivity in 2020.

Chatterjee predicts the company may introduce two high-end models (one 6.1-inch and one 6.7-inch) with support for mmWave, as well as a triple-lens camera and “world facing” 3D sensing for improved Augmented Reality capabilities.

Earlier Kuo also said that Apple is preparing to release a new iPad Pro, a new MacBook and an augmented reality (AR) headset by the first half of 2020.

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Apple is expected to launch as many as four new iPhones spread across different display sizes in 2020 and now Apple analysts, Macotakara shared more details about the iPhone 12 design from a source from company’s supply chain in Asia. Pixabay

Kuo expects Apple to team up with third parties to create the first batch of AR headsets.

The new iPad Pro models will be launched in the first quarter and will reportedly come with a rear-facing 3D Time-of-Flight sensor for increased accuracy in depth-of-field photography.

ALSO READ: Samsung Unveils Flagship Samsung Galaxy S10 Lite For Rs 39,999

While, a MacBook with a new scissor-switch keyboard could be launched in Q2 2020. (IANS)