NATIONAL ZOOLOGICAL PARK (W/ Ministry of Environment | Delhi, India)

Introduction

The management at Delhi Zoo faced persistent challenges in controlling excessive algal blooms and maintaining water quality across several ponds. Despite efforts to resolve these issues using conventional aeration systems and fountains, the results were ineffective in reducing algae or improving overall water quality.

NICO-Nanobubble India Co. recommended the adoption of nanobubble technology to address the root causes of these problems and enhance water quality sustainably.

Objectives

  • The primary objective is to remove the algae concentration in the pond water and to restore the water bodies.
  • To analyze the changes in the following water parameters: BOD, COD, TSS, E-Coli and DO.

Initial Condition Of Pond

[Marsh Crocodile Pond]

On December 2, 2024, NICO Nanobubble India Co. successfully installed its system at Pond No. 18 of the Delhi Zoo, home to Marsh Crocodiles. As shown in the accompanying figure, the pond’s surface, bottom, and sidewalls were heavily covered with algae prior to the installation.

Final Condition Of Pond

[Marsh Crocodile Pond]

On January 13, 2025, following the installation of the NICO Nanobubble system at Pond No. 18 on December 2, 2024, the key results of the experiment were as follows:

  • Dissolved Oxygen (DO): Enhanced Levels up to 30.86 ppm.
  • Water Quality Improvement: Significant reduction in BOD, COD, E. coli, and TSS levels.
  • Algae Reduction: Noticeable decrease in algae and clearer water within four weeks of NB generator installation.
  • Efficacy Over Time: By the end of the first month, the pond was free of algae and E. coli, achieving crystal-clear water.
Units Pond Water (Before) (02.12.2024) Pond Water (After)(13.01.2025)
Total Suspended Solids (TSS) Mg/L 73 27
Total Dissolved Solids (TDS) Mg/L 3042 2420
BOD Mg/L 30 7
COD Mg/L 260 60
E-Coli MPN/100ml 10 Absent
Dissolved Oxygen (DO) PPM 1.1 30.86
Day-1 (Before)
Day-42 (After)

NICO NANOBUBBLE INDIA CO.

Smart, Seamless, Invisible Solution