To improve the quality of existing water sources, such as lagoons and swamps, making wastewater sources by the effluent by filtration is water hyacinth. The Lake is a Lake of the Lake project, a large, makkasan, rajthevee, addresses the total area of the Lake in the heart of Bangkok, about 92 acres as a water source in the plant of railway train in Thailand, makkasan. Where to train in Thailand have been dug up. In the years since as a source of 2474 drainage and waste water as well as gasoline engines from the factory makes the bung makkasan, rajthevee railway shallow from the sedimentation of the Lake have suspension, there are enough 3 community makkasan 729 households, most of which were taken and sewage waste into the bung makkasan, until the problems of environmental degradation and complications, polluted water, waste has become a source of disease spores. His Majesty he realizes this is pollution of senile thanop RA initiative. When April 15 and April 20, 1937, 2528. improve as places blessed makkasan catchment. Aid in drainage in the rainy season and to relieve the State of wastewater in SAM by the Royal instructions, using water hyacinth, water damage because the water hyacinth is qualified to act as a filter, which is called natural water filtration is water hyacinth weed, which is much of the existing work duties and focus on impurity absorption of toxins from polluted water, waste and at the same time, they want to keep on bringing the water hyacinth from the Lake every 10 weeks for water hyacinth has obscured the sunlight that reproduce until it shines into the swamp.
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