| 摘要 |
PROBLEM TO BE SOLVED: To provide a flocculating method which enables the quick flocculation of every pollutant such as a very poisonous substance, for example, PCB, arsenic and the like, treats a treatment-difficult liquid, and is low in cost. SOLUTION: A main flocculant which primarily comprises water glass and sea water is applied to a liquid to be treated. The main flocculant can be used alone, but the use of a preparatory flocculant at a prior stage increases the effect of the main flocculant. When water glass is added to sea water, the water glass is gelificated by the stimulus of calcium ion in the sea water. So, a gel, which is obtained by adding water glass of 30-100 g, preferably 50-80 g, to sea water of 1,000 cc, is preliminarily prepared as the main flocculant. The preparatory flocculant can be a flocculant consisting of aluminium sulfate and sodium carbonate or a flocculant consisting of water glass and calcium chloride. When organic substances are contained, the preparatory flocculant can be calcium chloride. COPYRIGHT: (C)2008,JPO&INPIT
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