THROUGH ELECTRIC COAGULATION TREATMENT OF WASTEWATER CONTAINING HIGH CONCENTRATIONS OF SILICA

摘要

PURPOSE: A high concentration silica-containing waste water treatment method by using electric aggregation reaction is provided to reduce silica drastically and the used amount of a polymer coagulant, thereby reducing waste water treatment costs and waste generation. CONSTITUTION: A high concentration silica-containing waste water treatment method comprises the following steps of: the step(S100) of controlling pH concentration of waste water by 4.0-7.0, by injecting sulfuric acid or NaOH into the waste water which contains high concentration silica; the step(S110) of implementing electric aggregation reaction to the waste water; the step(S120) of controlling pH concentration of the reacted water by 6.0-8.0, by injecting sulfuric acid or NaOH; the step(S130) of treating the reacted water with coagulation and precipitation by injecting a liquid polymer coagulant at a ratio of 1-10ppm; and the step(S140) of filtering the treated water. [Reference numerals] (AA) Start; (BB) End; (S100) pH control of waste water; (S110) Electricity aggregation reaction; (S120) pH control of reacted water; (S130) Aggregation by a polymer coagulant; (S140) Filtering process