Process of purifying water with activated carbon

Claim 1

IN A PROCESS OF PURIFYING WATER CONTAINING DISSOLVED HEAVY METAL COMPOUNDS AND TASTE AN ODOR IMPARTING SUBSTANCES, WHEREIN THE WATER TO BE PURIFIED IS DOSED WITH AN OXIDIZING AGENT AND THEN CONTACTED WITH A BED OF ACTIVATED CARBON TO PRECIPITATE THE OXIDIZED HEAVY METAL COMPOUNDS AND REMOVE TASTE AND ODOR IMPARTING SUBSTANNCES, THE IMPROVEMENT COMPRISING PASSING THE WATER DOSED WITH OXIDIZING AGENTS DOWNWARDLY THROGH A BED OF GRANULAR ACTIVATED CARBON SUFFICIENTLY DEEP OT SUBSTANTIALY COMPLETE THE CATALYTIC PRECIPITATION AND DEPOSITION OF DISSOLVED HEAVY METAL COMPOUNDS JOXIDIZED BUT NOT PRECIPITATED BY SAID OXIDIZING AGENTS ON THE CARBON IN THE UPPER PORTION OF SAID BED AND TO MAINTAIN THE CARBON IN THE LOWER PORTION OF SAID BED FREE OF PRECIPITATED HEAVY METAL COMPOUNDS AND AVAILABLE FOR ADSORBING TASTE AND ODOR IMPARTING SUBSTANCES, BACKWASHING SAD UPPER PORTION WHEN ITS CATALYST CAPACITY IS EXHAUSTED TO PREVENT PENETRATION OF PRECIPITATED HEAVY METAL COMPOUNDS INTO SAID LOWER PORTION, THEN CONTINUING FLOW OF WATER TO BE PURIFIED THROUGH BOTH PORTIONS OF THE BED, AND REPEATING THE ALTERNATE BACKWASHING OF SAID UPPER PORTION AND PASSING OF WATER OF BE PURIFIED THROUGH THE ENTIRE BED UNTIL THE ADSORPTIVE CAPACITY OF SAID LOWER PORTION OF THE CARBON BED IS EXHAUSTED.