Case studies

Restoring Eutrophic Lake in India with Bubble Tubing® Aeration

Restoring Eutrophic Lake in India with Bubble Tubing Aeration®
Before Aeration: Lake Pushkar in India was known for fish kills, severe algae and noxious odours.
Fish kill in Lake Pushkar
Pushkar Lake, India, with Bubble Tubing® aeration line clearly visible. Credit: Tim Makins
  • Restoring Eutrophic Lake in India with Bubble Tubing Aeration®
  • Before Aeration: Lake Pushkar in India was known for fish kills, severe algae and noxious odours.
  • Fish kill in Lake Pushkar
  • Pushkar Lake, India, with Bubble Tubing® aeration line clearly visible. Credit: Tim Makins
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Ajmer Development Authority

Pushkar Sarovar Lake, Rajasthan, India

Read the complete case study (PDF): Restoring eutrophic lake via Bubble Tubing® aeration

Mandate

The restoration of the hyper-eutrophic Pushkar lake in India, using our Bubble Tubing®, followed the fish kill of September 2008.  This case study was provided by our client Randhawa Brosons Enterprises, the company in charge of this restoration project.

Pushkar is a small town of about 14,000 people.  The total size of Pushkar Lake is 4.5 hectares. In 2008 (on average) Pushkar Lake was about 2 meters deep before reaching the  1 – 2 meters of benthic muck.

Pushkar Lake is one of the most sacred lakes of the Hindu Religion, references to this lake can be found on coins as early as the 4th century BC!

Being that Pushkar is one of the oldest currently inhabited cities in India, it is safe to reason that organic offerings have been made into the lake for thousands of years. Thus, the solution had to be engineered to deal with over a meter of organic benthic material, without stirring or disturbing the sediment.  If stirred, the suspended sediments would have drastically reduced the already poor water quality.

SolutionEutrophic lake after bubble tubing aeration, photo credit Inoxx78

To create a solution that would dramatically increase the Dissolved Oxygen while not churning the benthic material at the bottom of the lake, 600’ of Bubble Tubing® was used as the main aeration diffusion technology.

Post aeration, we received no reports of the usual people falling ill after drinking the water or bathing in the lake. More so, the visibility of the water cleared up dramatically after a few months, to where one could see the sandy bottom; whereas, before aeration one could not see an inch into the water due to pollution and cyanobacteria. The local people, priest, pilgrims, and tourist all enjoyed the newly aerated Pushkar Lake, as it did not smell of sewage, nor did it smell of anaerobic digestion as clearly stated in the appreciation letters.

You will find in this amazing case study:

  • Full presentation of the project and history of Pushkar Lake
  • Parameters of the water quality before aeration
  • Description of solution and products
  • Before and after pictures
  • Test results reports
  • Appreciation letter from the government, the Municipality Customer and the Congress Party