Water bodies within zoological parks are critical for maintaining animal health, hygiene, and ecological balance. At the Delhi Zoo, multiple ponds were experiencing severe water quality degradation due to excessive algal blooms, high organic load, and low dissolved oxygen levels.
Conventional aeration systems and fountains proved insufficient in addressing these challenges, leading to persistent water quality issues and compromised aquatic conditions. A sustainable, non-invasive, and effective solution was therefore required to restore and maintain these water bodies.
Prior to the deployment of nanobubble technology, the Marsh Crocodile pond exhibited several critical challenges:
NICO deployed its advanced nanobubble-based aeration and oxidation system, comprising:
The system generates ultra-fine gas bubbles (<200 nm), which remain suspended in water for extended periods. This enables:
| Parameter | Unit | Before (02.12.2024) | After (13.01.2025) |
|---|---|---|---|
| Dissolved Oxygen (DO) | ppm | 1.1 | 30.86 |
| Biological Oxygen Demand (BOD) | mg/L | 30 | 7 |
| Chemical Oxygen Demand (COD) | mg/L | 260 | 60 |
| Total Suspended Solids (TSS) | mg/L | 73 | 27 |
| Total Dissolved Solids (TDS) | mg/L | 3042 | 2420 |
| E. coli | MPN/100 mL | 10 | Absent |
Day-1 (Before)
Day-42 (After)
Sustainable Operation: Energy-efficient and suitable for continuous operation in sensitive environments such as zoos.
The successful deployment of NICO’s nanobubble technology at the Delhi Zoo demonstrates its effectiveness in rapidly restoring water quality in challenging and sensitive environments. The system not only eliminated algal blooms and microbial contamination but also significantly improved overall water quality and ecosystem health.
This case study highlights the strong potential of nanobubble technology for application in zoological parks, lakes, reservoirs, and other stagnant water bodies requiring sustainable and chemical-free treatment solutions.
