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.

Recognizing the need for a more innovative solution, 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 at Beat No. 1 and restored the water body for Lion-Tailed Macaque (LTM).
  • To analyze the changes in the following water parameters: BOD, COD, TSS, E-Coli and DO.

Initial Condition Of Beat No. 1 [Lion-tailed Macaque (LTM)]

On March 25, 2025, NICO Nanobubble India Co. successfully installed its system at Beat No. 1 at the Delhi Zoo, home to Lion-Tailed Macaque (LTM). 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 Beat No. 1 [Lion-tailed Macaque (LTM)]

On May 28, 2025, following the installation of the NICO Nanobubble system at Beat No. 1 on March 25, 2025, the key results of the experiment were as follows:

  • Dissolved Oxygen (DO): Enhanced Levels up to 22.58 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 Beat No. 1 (Before) (25.03.2025) Beat No. 1 (After) (28.05.2025)
Total Suspended Solids (TSS) Mg/L 102 35.2
Total Dissolved Solids (TDS) Mg/L 7280 3880
BOD Mg/L 42 15.6
COD Mg/L 350 130
E-Coli MPN/100ml 15.5 Absent
Dissolved Oxygen (DO) PPM 6.3 22.58

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