Introduction
Harmful algal blooms are becoming an increasing challenge for inland waters across the United States. Nutrient runoff, warming temperatures, and changing environmental conditions are some factors. These have contributed to more frequent and intense blooms, some of which produce toxins. Hence, threatening ecosystems, public health, and recreational water use. Therefore, Maryland tests innovative technology to reduce harmful algal blooms.
In response, the Maryland Department of Natural Resources has partnered with researchers from the University of Maryland to explore innovative, non-chemical approaches to algae management. One of the solutions recently tested on inland lakes involves a solar-powered, floating device that uses ultrasonic technology to help limit algal growth.
How does the technology work?
The system works by emitting low-power ultrasonic waves into the water column. These sound waves create conditions that interfere with algae’s ability to remain near the water surface, where sunlight is essential for photosynthesis. By disrupting this process, algal growth is reduced before dense surface blooms can form.
Unlike mechanical removal or chemical treatments, the technology operates continuously and autonomously. Integrated solar panels power the system, allowing it to function with minimal maintenance and without external energy sources, supporting long-term deployment in remote or hard-to-access locations.
Conclusion
Field trials conducted during the summer on Maryland lakes demonstrated promising results. According to state officials, the technology contributed to improved water clarity and supported safer conditions for recreational use. While each floating unit represents a significant investment, the Department of Natural Resources has indicated that the long-term benefits for lake health and public safety make it a worthwhile option to consider.