| 摘要 |
PURPOSE: A tertiary treatment of wastewater is provided, which is characterized in that raw water is filtered, and organic matters are adsorbed by activated carbon, then ionic matters are treated by osmotic pressure. CONSTITUTION: Organic matters included in wastewater are cohered by using inorganic cohesion agent like alum and polymer cohesion agent. The size of cohered floc and intensity are appropriate, so the amount of remained agent can be reduced. Raw water including surface active agent is difficult to disintegrate biologically, so, activated carbon is used for adsorbing. A filtration device which uses dead-end flow form is provided. The membrane of the filtration device is made of poly acrylo nitrile, and remained organic matters are piled on the membrane. Pressured air is passed through the membrane for scrubbing, so, operating pressure can also be lowered.
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