METHOD OF TREATING WATER Russian patent published in 1997 - IPC

FIELD: water treatment. SUBSTANCE: natural and industrial waters are treated by electrocoagulation technique involving pulse voltage and periodical voltage variation on electrodes of electrocoagulator. Pulse repetition period T consists of n pulses of positive polarity voltage and m pulses of negative polarity voltage with τ duration and interpulse pause duration τ₂ plus one pause τ₃, i.e. T=(n+m)τ₁+(n+m-1)τ₂+τ₃ where n ≥ m. Voltage pulses have quasi-triangular form. Parameters τ₂ and τ₃, n, and m are controlled as functions of impurity concentrations retaining summary number of positive and negative polarity pulses: n+m= Const. EFFECT: enhanced efficiency of process. 1 dwg, 2 tbl