China's Taihu Lake nanobubble test sees cyanobacteria measure fall nearly 90%

A field trial using a two-stage nanobubble treatment system across a 3,300-square-metre section of Taihu Lake in eastern China reduced a key measure of toxic cyanobacteria by nearly 90 per cent within 20 days. Published in the journal Environmental Research and indexed on PubMed, the peer-reviewed study describes an in-situ restoration project aimed at controlling harmful algal blooms and improving water clarity in one of China's largest freshwater lakes. The treatment combined hydrodynamic cavitation with ozone nanobubbles in a semi-enclosed test area. Water quality monitoring showed that chlorophyll-a, a key indicator of cyanobacteria levels, fell by 89.8 per cent during the three-week trial. Severe cyanobacterial blooms have affected Taihu Lake for decades. Agricultural runoff, industrial discharge and urban wastewater across the Yangtze River Delta have helped drive the problem.