6 SLIME CONTROL AGENTS IN INDUSTRIAL WATER SYSTEMS-NAMELY, [ SODIUM SALTS OF CHLORINATED PHENOLS, ] QUATERNARY AMMONIUM SALTS, [ COPPER SULPHATE, MERCURY SALTS, POTASSIUM PERMANGANATE, ] CHLORINE RELEASING COMPOUNDS, BROMINE RELEASING COMPOUNDS, AND OXYGEN RELEASING COMPOUNDS IN VARIOUS ADMIXTURES