FIELD: sewage treatment. SUBSTANCE: organic coagulating agent is added to sewage - condensation product of dicyandiamine with formaldehyde and sodium silicate. Optimal time interval between addition of organic coagulating agent and sodium silicate is 3-10 min; optimal ratio of doses is 1:(5-12), respectively. Treatment time is 10-40 min, treatment degree is 98%. EFFECT: increased effectiveness of sewage treatment. 3 cl, 2 tbl
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