The present invention relates to a method for removing suspended solids in sewage disposal using a coagulant, wherein waste concrete using alumina cement as a main material is used as the coagulant after pulverizing for removing the suspended solids in sewage disposal. According to the present invention, by utilizing the waste concrete, which is a by-product of cement providing many causes for carbon dioxide emissions and being discarded as large waste after the use, as a coagulant in primary treatment to remove suspended solids during sewage disposal for the purification of sewage, an effect of solving environmental problems caused by carbon dioxide emission can be provided. Additionally, the present invention expected to provide the effect that the recycling concrete for carbon dioxide reduction not only in Korea but also globally will provide economic benefits and an important influence on the advanced utilization policy.;COPYRIGHT KIPO 2019
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