Rapid coagulation-flocculation and sedimentation type waste water treatment method

摘要

The present invention relates to a high speed coagulant-flocculant and sedimentation method for treating waste water, which permits a speedy treatment of waste water including stormwater runoff and also permits a valuable reuse of the sludge produced in the course of treatment. According to the present invention which achieves the object as described above, there is provided a method for treating waste water based on a high speed coagulation-flocculation and sedimentation which method is conducted in an arrangement for treating waste water based on a high speed aggregation and sedimentation, comprising a mixing tank, agitating tank, polymer aggregation tank and sedimentation tank in successive connection in that order, said arrangement being provided with transporting lines for transporting to the mixing or agitating tank the sludge produced in the sedimentation tank, and which method comprises introducing into the mixing tank the aggregating agent based on clay minerals, including zeolite or bentonite as the main component, introducing into the agitating tank an inorganic coagulant, and introducing into the polymer aggregation tank a polymeric flocculant on one hand, and introducing a combination of glass particle and kieselguhr into at least one of the mixing, agitating and polymer aggregating tank to convert the sludge resulted from treating the waste water into reusable porous ceramics on the other hand.