Improve Water Quality Of Potable Water Reservoirs To Eliminate Geosmins From Blue-Green Algae, Reduce Manganese, Remove Trihalomethane (Thm) And Eliminate Foul Taste And Water Odor Problems. Many reservoirs around the world have water quality problems. Water quality issues vary, but blue-green algae, manganese, trihalomethanes, taste and odor are at the top of the list. Trihalomethanes are cancer producers and manganese in the water supply turns laundry gray. Odor and bad taste in drinking water has plagued residents for years. Also, a black coloration in the water often stains residents’ clothing during laundering. Manganese, blue-green algae, and iron all contribute to these problems. Reducing and/or eliminating manganese, blue-green algae and iron will solve these problems. CLEAN-FLO International effectively solves the coloration problem and finds a better solution to the annual algae problem. CLEAN-FLO installs Continuous Laminar Flow Inversion and Oxygenation Systems in reservoirs to improve water quality. CLEAN-FLO’s unique aeration systems continuously bring water up to the surface from the reservoir bottom without creating turbulence. Turbulence would have mixed the low-oxygen bottom water and the toxic gases that accumulate at the bottom of the reservoirs, with the rest of the reservoir water. Turbulence would create even worse problems than the residents already had. Within weeks of the installation, there are dramatic improvements in transparency, and iron and manganese levels drop to near-zero. The taste and water odor problems disappear and the residents are pleased. Our inversion system gently turns the reservoirs’ water over and brings the foul-smelling gases up to the surface where they are neutralized by the atmosphere. Inversion also takes oxygenated surface water down to the bottom where the oxygen kills the bacteria that produce the foul-smelling gases. The blue green algae, which only grow on the surface, are taken to the bottom where it cannot grow because of lack of sunlight. Finally, by oxygenating the entire reservoir, iron and manganese that cause the discoloration of the clothing and sinks, are oxidized and deposited on the bottom. Both oxidized manganese and oxidized iron then become useful in binding the phosphorus and nitrogen to the bottom sediment, making it no longer available for algal growth. CLEAN-FLO aeration systems sometimes adds natural buffered phosphate precipitants and natural, harmless beneficial bacteria that feed on dead tree leaves and wastes that wash into reservoirs when it rains. The precipitants and the bacteria both remove food for aquatic plants and algae. The inversion of reservoirs is so effective that phosphate precipitants and bacteria additions often are not necessary. The inversion process is more effective than ordinary aeration systems. It is less costly than treating all incoming water from the watershed, which is impossible, anyway. Most incoming water, such as “non-point source” watershed runoff cannot be treated at all before it enters the reservoirs. Our experience with reservoirs since 1970 has shown that utilizing the CLEAN-FLO aeration process on reservoirs results in a significantly reduced cost of water treatment. The Feng-Shan Reservoir Project: Taste and odor problems from the Feng-Shan Reservoir in Taiwan were caused by manure from hundreds of pig farms upstream. CLEAN-FLO quickly eliminated the taste and odor problem and saved the Taiwan government $586,000 a year in water-treatment costs. Cyanophyceae in reservoirs and lakes: Cyanophyceae (blue-green algae) in reservoirs are a primary cause of unfavorable taste and odor in drinking water. This paper presents a history of studies showing less blue-green algae in lakes and reservoirs using combinations of continuous laminar flow inversion and buffered alum.
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