The Challenge The rainwater reservoir for fire extinguishing purposes was covered with filamentous green algae. The green filamentous algae regularly clog filters located before the jockey pumps. Every year, the factory empties the basin for maintenance and dosing oxygen peroxide (200 ppm) to control algae. Two LG Sonic e-lines were installed to treat the waterbody. The units were connected to a local power source. The LG Sonic e-line emit

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