We've all had a good laugh at the expense of our Soylent Green Commander-in-Chief and his failed attempt to "fix" the Washington Monument Reflecting Pool. There is a technical explanation to why it failed. Had the president bothered to take the time (About 5 seconds of my time, your mileage may vary), he might have found out why his "I know a guy" solution might not work.
The ozone micro/nanobubblers struggle to keep up because the pool is an enormous, shallow, and sunlit body of water that is constantly fed by a century-old plumbing system. The technology cannot outpace the blooms due to several compounding factors:
Contaminated Supply Lines: When the system is turned on, stagnant, algae-filled water from the dormant, underground piping system gets pushed directly into the pool, introducing an explosive seed source.
Pool Thermodynamics: The pool is shallow, exposed to direct D.C. summer sunlight, and heavily absorbs heat. The darker "American flag blue" paint used in recent renovations makes the water noticeably warmer, which speeds up algae growth.
Scale and Demand: The pool holds over 6 million gallons of water. The nanobubblers work by creating oxidizing agents, but their capacity is continuously overwhelmed by the massive amount of organic material and nutrients present in the unfiltered river water.
Underlying Root Causes: Ozone bubbles are excellent at killing existing algae, but they do not remove the source nutrients (like phosphorus and nitrogen) that feed the algae in the first place, allowing new blooms to outpace the treatment.
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