Never miss a story

Get subscribed to our newsletter


×
A view of pollution at Ulsoor lake. Photo: mashable.com

Bengaluru: A novel product developed by Nualgi Nano Biotech (NNB), a low-profile biotech company here, is helping clean up sewage-polluted Ulsoor Lake where thousands of fish were found dead last week owing to depletion of dissolved oxygen.

Ulsoor Lake, famous for army rowing competitions as well as for boating among tourists, was seen covered with thousands of dead fish that left people here stunned.


“Called Nualgi, it is a mixture of micro-nutrients in the form of nano-particles, including silica, iron, and manganese,” said Thothathri Sampathkumar, who founded the company which patented the product in India in 2008.

“‘Nualgi’ triggers the rapid growth of a type of algae called ‘diatoms’ and the oxygen released by the diatoms through photosynthesis quickly increases the dissolved oxygen level of water and thus keeps the pond clean,” Sampathkumar told IANS.

According to Sampathkumar, one kg of Nualgi can treat four million liters of water, adding that the affected fishermen — who have the contract for fishing in Ulsoor lake – have purchased 40 liters of “Nualgi” from his company on March 6 to increase the dissolved oxygen level and stop further fish death.

“We can see the results very soon,” added Sampathkumar.

“Nualgi can be used to grow “diatom” algae in any water including sewage polluted water. The growing “diatoms” absorb carbon dioxide from the air and, by photosynthesis, release oxygen at the micro plant level. The oxygen released helps aerobic bacteria breakdown organics in the water into base constituents, thereby eliminating the stinking odour from the water.

The growing “diatoms” are eaten by zooplankton that, in turn, is consumed by fish. “The fish clean up the lakes of all ‘diatoms’, zooplankton and organics, thus restoring the polluted lakes and water bodies to its original glory,” said Sampathkumar.

According to him, the mass fish death in Ulsoor lake took place, perhaps because the fishermen ran out of their stock of Nualgi or missed its timely application.

The tragedy could have been averted had the authorities installed monitors to continuously record the level of dissolved oxygen (DO) in the lake water and alert them when DO falls below a critical level. These DO monitors, he said, are now commercially available.

“Nualgi has been patented also in the US, Britain, Germany, and South Africa. Five years ago, the three-acre “Duck Pond” in New York state in the US that “was in a highly impaired state with a variety of water quality issues” was restored to normal health thanks to “Nualgi.”

Lake Savers, the US company that tried it out, had acknowledged in an email to Sampathkumar that the water quality of “Duck Pond” showed a “remarkable and sustained improvement” after a single dose of Nualgi application and that “fish productivity and health improved dramatically.”

Encouraged by its successful experiment in New York’s “Duck Pond”, Lake Savers had obtained clearance from the US Environmental Protection Agency for using Nualgi on a large scale in the country.

Nualgi, that requires no skilled labor, is an economical alternative to treat sewage and organic wastes in “eutrophic” lakes and ponds contaminated by nitrogen or phosphorus compounds, such as by laundry detergents, untreated sewage, and fertilizer run-off from agricultural lands.

“Nualgi is being used in many lakes in southern India for the past several years and fishermen are buying the product to increase fish catch in water bodies.

Sampathkumar is hopeful of promoting its use worldwide to revive fresh water “eutrophic lakes” and “dead zones” in coastal regions that are so much deprived of oxygen that they can’t support aquatic life. (K.S. Jayaraman, IANS)


Popular

Unsplash

India is a core market for growth at LinkedIn and the second largest market in terms of members after the US.

Professional networking platform LinkedIn on Thursday unveiled a user interface in Hindi, with the goal to support 600 million Hindi language speakers globally.

With this launch, LinkedIn aims to break down language barriers, providing greater access to professional and networking opportunities to Hindi speakers in India and around the world. With the launch of Hindi, LinkedIn now supports 25 languages globally.

Keep Reading Show less
Uber

The service is being rolled out on a pilot basis in Lucknow first, and will soon be expanded to other cities in the country.

In a global-first move, ride-hailing major Uber and Meta-owned messaging platform WhatsApp on Thursday announced that people in India can now book an Uber ride via the company's official WhatsApp chatbot. The service is being rolled out on a pilot basis in Lucknow first, and will soon be expanded to other cities in the country.

Follow NewsGram on LinkedIn to know what's happening around the world.

Keep Reading Show less
Unsplash

"Our ability to simulate the lunar terrain at this scale is an exciting advancement for the development of space technology in Australia," CSIRO Space Programme Director Kimberley Clayfield said in a media release.

Australia's national science agency has opened a purpose-built facility to test technology before it is sent to the Moon.

The Commonwealth Scientific and Industrial Research Organisation (CSIRO) on Thursday opened the In-situ Resource Utilisation (ISRU) Facility in Brisbane. The facility provides a Moon-like environment to test rovers and related equipment before it is sent into space, Xinhua news agency reported.

Keep reading... Show less