Abstract <PICT:0987978/C1/1> Waste waters, containing solid particles, are treated with conventional flocculating, collecting and frothing agents and oxidizing gases in a two-stage process. The first stage is a beating action to produce complete oxidation followed by intense stirring with a gasiform medium which produces a highly subdivided dispersion of minute gas bubbles and minute solid particles which coalesce into a miscella and the sludge thus formed is removed from the surface. The sludge may be recirculated. Liquid under treatment is fed into stage I by nozzle 30 and overflows via channel section 32 into stage II of the apparatus, which is described in Specification 730,635; leaving for final separation in vessel 11. In stage I the bearing member 24 is used without liquid-tight packing of the spindle, air being sucked through inlet 47. Frothing agent is advantageously added by inlet 48 while the other conventional treatment materials are added prior to introduction of the water b pipe 30. <PICT:0987978/C1/2>
THE METHOD OF PURIFYING WATER WHICH CONTAINS IMPURITIES A PORTION OF WHICH ARE FLOCCULABLE AND THE REMAINDER OF WHICH ARE NON-FLOCCULABLE WHICH COMPRISES THE STEPS OF: ADDING TO SAID IMPURE WATER A WATER SOLUBLE MINERAL SALT WHICH FLOCCULATES UPON THE ADDITION OF AN ELECTROLYTE; SUBJECTING SAID IMPURE WATER WITH SAID SALT IN SOLUTION TO AGITATION IN THE PRESENCE OF AIR TO OBTAIN COMPLETE OXIDATION OF THE OXIDIZABLE CONSTITUENTS THEREOF; FORMING THE IMPURE WATER WITH ITS OXIDIZED CONSTITUENTS INTO A HIGH VELOCITY SHEET SURROUNDED BY AIR; DIRECTING SAID SHEET AGAINST AN IMPACT SURFACE FOR PRODUCING AN INTIMATE MIXTURE OF WATER, MINIATURE AIR BUBBLES AND IMPURITIES ADDING SAID ELECTROLYTE TO SAID IMPURE WATER NO LATER THAN SAID DIRECTING STEP; CONVEYING SAID MIXTURE TO A SEPARATION TANK; PERMITTING FLOCS INCLUDING SAID BUBBLES TO FORM IN SAID SEPARATION TANK WHEREBY SAID FLOCS RISE TO THE SURFACE LEAVING PURIFIED LIQUID BELOW; SKIMMING SAID FLOCS FROM THE TOP OF THE LIQUID IN SAID SEPARATION TANK; AND WITHDRAWING PURIFIED LIQUID FROM BENEATH SAID FLOCS.
Claim 2
Independent Claim
167 words
THE METHOD OF PURIFYING WATER WHICH CONTAINS IMPURITIES A PORTION OF WHICH ARE FLOCCULABLE AND THE REMAINDER OF WHICH ARE NON-FLOCCULABLE WHICH COMPRISES THE STEPS OF: ADDING TO SAID IMPURE WATER A WATER SOLUBLE MINERAL SALT WHICH FLOCCULATES UPON THE ADDITION OF AN ELECTROLYTE; SUBJECTING SAID IMPURE WATER WITH SAID SALT IN SOLUTION TO AGITATION IN THE PRESENCE OF AIR TO OBTAIN COMPLETE OXIDATION OF THE OXIDIZABLE CONSTITUENTS THEREOF; FORMING THE IMPURE WATER WITH ITS OXIDIZED CONSTITUENTS INTO A HIGH VELOCITY SHEET SURROUNDED BY AIR; DIRECTING SAID SHEET AGAINST AN IMPACT SURFACE FOR PRODUCING AN INTIMATE MIXTURE OF WATER, MINIATURE AIR BUBBLES AND IMPURITIES ADDING SAID ELECTROLYTE TO SAID IMPURE WATER NO LATER THAN SAID DIRECTING STEP; CONVEYING SAID MIXTURE TO A SEPARATION TANK; PERMITTING FLOCS INCLUDING SAID BUBBLES TO FORM IN SAID SEPARATION TANK WHEREBY SAID FLOCS RISE TO THE SURFACE LEAVING PURIFIED LIQUID BELOW; SKIMMING SAID FLOCS FROM THE TOP OF THE LIQUID IN SAID SEPARATION TANK; AND WITHDRAWING PURIFIED LIQUID FROM BENEATH SAID FLOCS.