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Nanobubbles Zap Lake Algae: 90% Reduction in 20 Days
7 Sep
Summary
- Nanobubble system cut toxic cyanobacteria by 90% in 20 days.
- Treatment boosted oxygen levels and improved water clarity.
- New method offers eco-friendly alternative to chemical treatments.
A recent field trial in China's Taihu Lake demonstrated remarkable success in controlling harmful algal blooms. Utilizing a two-stage nanobubble treatment system over a 3,300-square-metre area, researchers achieved an 89.8% reduction in chlorophyll-a, a key indicator of cyanobacteria, within 20 days. This peer-reviewed study, published in Environmental Research, combined hydrodynamic cavitation with ozone nanobubbles.
The nanobubble technology proved effective in breaking down cyanobacterial cells and degrading organic pollutants. Water quality monitoring showed significant decreases in ammonia nitrogen, total phosphorus, and chemical oxygen demand. Conversely, dissolved oxygen levels increased, and water transparency improved, aiding the natural recovery of submerged aquatic plants.
Taihu Lake, situated between Jiangsu and Zhejiang provinces, has long struggled with severe cyanobacterial blooms driven by agricultural runoff and industrial discharge. Traditional remediation methods have proven challenging for large-scale application and can introduce further pollution. This nanobubble system represents a leap towards efficient, targeted, and low-energy water management solutions.
