초록 ▼

A process is disclosed for treating waste water which comprises the steps of adding thermal decomposition product consisting of CaO-MgO-SiO2 system compound singly or in combination with at least a metal salt selected from the group consisting of iron salts and magnesium salts to waste water contain

A process is disclosed for treating waste water which comprises the steps of adding thermal decomposition product consisting of CaO-MgO-SiO2 system compound singly or in combination with at least a metal salt selected from the group consisting of iron salts and magnesium salts to waste water containing an emulsion or a latex, thereby causing coagulation and sedimentation of particles consisting mainly of resin existing in the waste water and then removing the coagulated particles.

대표청구항 ▼

A process for treating waste water containing one or more latexes or emulsions of synthetic resin particles in order to remove the synthetic resin particles, which comprises the steps of: adding to and mixing in said waste water a CaO-MgO-SiO2 treatment agent which has been prepared by heating, at a

A process for treating waste water containing one or more latexes or emulsions of synthetic resin particles in order to remove the synthetic resin particles, which comprises the steps of: adding to and mixing in said waste water a CaO-MgO-SiO2 treatment agent which has been prepared by heating, at a temperature in the range of from 700°C. to 1000°C., a mixture of (1) dolomite which is thermally decomposed to form CaO and MgO at said temperature and (2) SiO2-containing substance, mixed in proportions such that the weight ratio of CaO/MgO in said treatment agent is greater than 1, the weight ratio of MgO/SiO2 in said treatment agent is greater than 1, and the sum of CaO, MgO and SiO2 in said treatment agent is greater than 80 weight %, whereby to cause coagulation and sedimentation of said synthetic resin particles to form flocs, and then separating said flocs from the remainder of the treated waste water.