Lok Sabha Question No. 24 (UNSTARRED), answered on 2025-02-03
Subject: Nano Bubble Technology
Ministry: ENVIRONMENT, FOREST AND CLIMATE CHANGE
Asked by: Dr. Shrikant Eknath Shinde, Shri Ravindra Dattaram Waikar, Smt. Shambhavi, Shri Rajesh Verma, Dr. D. Purandeswari, Shri Naresh Ganpat Mhaske

## GOVERNMENT OF INDIA MINISTRY OF ENVIRONMENT, FOREST AND CLIMATE CHANGE

## LOK SABHA

## UNSTARRED QUESTION NO.24

TO BE ANSWERED ON 03.02.2025

## Nano Bubble Technology

## 24. SHRI RAJESH VERMA:

SMT. SHAMBHAVI:

DR. SHRIKANT EKNATH SHINDE:

SHRI NARESH GANPAT MHASKE:

DR. D. PURANDESWARI:

SHRI RAVINDRA DATTARAM WAIKAR:

Will the Minister of ENVIRONMENT, FOREST AND CLIMATE CHANGE be pleased to state:

- (a) the details of the expected environmental and ecological benefits of implementing Nano Bubble Technology for algae removal and water purification;
- (b) the details of difference between the Nano Bubble Technology and the conventional methods of  water  purification  and  the  manner  in  which  it  aligns  with  the  goals  for sustainable water management of the country;
- (c) the steps taken by the Government to ensure the proper hygiene and the health of the aquatic animals in the different wildlife conservation sites since 2019;
- (d) whether  there  are  mechanisms  in  place  to  monitor  the  long-term  impact  of  this technology on water quality and animal health if implemented widely, if so, the details thereof; and
- (e) whether  the  Government  is  considering  to  install  the  aforementioned  technology  in wildlife conservation sites of different States, especially in Maharashtra and Bihar?

## ANSWER

MINISTER  OF  STATE  IN  THE  MINISTRY  OF  ENVIRONMENT,  FOREST  AND CLIMATE CHANGE

(SHRI KIRTI VARDHAN SINGH)

(a) & (b)

Nano bubble technology is a method of water treatment that uses tiny bubbles to improve water quality.  The  important  ecological  benefits  are  to  remove  contaminants,  increase  dissolved oxygen content, help in the removal of phytoplankton (algae), reduce biofilm, and ultimately improve the properties of water suitable for aquatic animals. The nano bubble technology can lead  to  a  more  homogeneous distribution  due to  the minuscule size  and  persistence of  the bubbles in the water bodies. On the other hand, traditional systems may exhibit less uniformity in distribution, which can result in variable oxidation and disinfection performance across the water volume. One machine using the Nano Bubble technology has been put on a trial basis in National Zoological Park, Delhi, recently on 3.12.2024. It is under trial.

## (c)

The Management of National Parks and Sanctuaries, including those Protected Areas having aquatic animals, is done as per the Management Plan prepared under the provisions of the Wild Life  (Protection)  Act,  1972.  These  include  maintaining  water  level,  water  circulation  and dilution,  silt  removal,  aeration,  establishing  STP  along  the  water  bodies  and  aquatic  weed removal through mechanical and manual methods.  The Central Zoo Authority, in fulfilment of the functions assigned, implemented the standard and norms, inclusive of proper hygiene and  health  of  all  captive  animals  in  zoos  including  aquatic  animals,  as  prescribed  in  the Recognition of Zoo Rules, 2009 notified by the Central Government under section 63 of the Wild Life (Protection) Act, 1972. Further, the Central Zoo Authority has issued guidelines to zoos time to time for proper hygiene and health of all captive animals in zoos.

## (d) & (e)

As nano bubble technology has been used in India for water treatment recently only on a pilot basis, the long-term impact of this technology on water quality and animal health can be known in due course of time.

***