Bueng makkasan waste water treatment systems "" as a natural wastewater treatment system called Oxidation Pond system, or "wind the Sun" which looks into the pond; Depth of 0.5-2 meters and light can shine into the water in the pond. Water hyacinth has been grown in the wells to absorb nutrients and heavy metals from the water in the pond is a collaboration of the water plants (seaweed) with bacteria during the daytime, algae take carbon dioxide, water and sunlight in photosynthesis processes (Photosynthesis) to produce carbohydrates for the growth and reproduction of the self with the liberation of oxygen gas for bacteria to degrade organic compounds in waste water.
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