2. Treatment of waste water with water hyacinth his Majesty Lord son of sacred heart in order to improve the quality of existing water sources, such as lagoons and swamps, to the waste water treatment by one of them: With the principle of waste water along the theory developed by filtering water and waste water with water hyacinth
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3. The waste water treatment plant with a mixture of water with air. Problem with polluted water, he was conscious that occurred in Nong Nong Han Sakon Nakhon province, which is home to receive wastewater from households in the municipality, district, Sakon Nakhon. "BA King therefore granted Royal development concept. Theory of wastewater treatment plant, with a mixture of water with air-filled system at Nong Nong Han-concubines, Sakon Nakhon province. By the Fisheries Department in conjunction with the Royal irrigation Department carried out a study and construction of wastewater treatment plant in the area. There are water plants with a treatment system by which wastewater treatment method natural method in 84.5 acres and the construction was completed when 2537 (1994) (Office of the national water resources Board, 2539 (1996): 222)
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