排水処理における合成蛍石懸濁液のヘテロ凝集現象 [in Japanese] Hetero-flocculation Phenomena in Waste Water Treatment with Artificial Fluorite Suspension [in Japanese]
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Waste water from mineral processing factories and organic chemical factories usually includes fine solids such as minerals, organic particles and microorganisms which can be removed fastening their settling velocities through flocculation. Generally organic flocculants have been used to treat the fine solids, but it is hard to deal with the obtained sediment because of the moisture including in it. The use of inorganic flocculants is limited because of the tendency of flocculant ions to remain into the clarified water. To cope with these problems, authors have been studying the development of a new method of waste water treatment by hetero-flocculation with fluorite. From the previous study on the treatment of two types of waste water (fluorite flotation tailing and bauxite residue from an alumina refining factory), it is found that artificial fluorite suspension in small quantity is more effective. In this study, the effect of artificial fluorite suspension as flocculant has been investigated using fluorite flotation tailing, organic matter after processing acrylic resin and microorganism after C. O. D treatment. It is noticed that the supernatant concentration of fluorite flotation tailing (height of 32 mm) reduces by hetero-flocculation for a few minutes when a small quantity of artificial fluorite suspension is added. The diluted waste water of organic maters and microorganism on the other hand are flocculated by the addition of a little of an artificial fluorite suspension and each supernatant concentration decreases.
- Journal of MMIJ
Journal of MMIJ 114(4), 243-246, 1998-04-25
The Mining and Materials Processing Institute of Japan