WASTE TREATMENT PROCESS

• US 3,846,289 A
• Filed: 06/19/1972
• Issued: 11/05/1974
• Est. Priority Date: 06/19/1972
• Status: Expired due to Term

• Current Assignee: Beer C, Jeris J, Mueller J
• Original Assignee: Beer C, Jeris J, Mueller J
• Inventors: JERIS J, BEER C, MUELLER J
• Application Number:
  US05/264,346
• Time in Patent Office: 869 Days
• US Class Current: 210/610
• CPC Class Codes: C02F 3/2806 Anaerobic processes using solid supports for microorganisms
• CPC Class Codes: C02F 3/34 characterised by the microorganisms used
• CPC Class Codes: Y02E 50/30 Fuel from waste, e.g. synthetic alcohol or diesel
• CPC Class Codes: Y10S 210/903 Nitrogenous

Abstract

1. PROCESS FOR DENITRIFYING WASTE WATER CONTAINING NITRIFIED WASTE PASSING THE WASTE WATER THROUGH A BED OF MICROORGANISMS, SAID BED ADAPTED TO PASS SUSPENDED SOLIDS PRESENT IN SAID WASTE THERETHROUGH, COMPRISING: (A) GENERATING AN UPFLOW FLUIDIZED BED OF DENITRIFYING BIOTA, SAID BIOTA ATTACHED TO A SOLID PARTICULATE CARRIER, SAID CARRIER HAVING A PARTICLE SIZE FROM ABOUT 0.2 TO 3 MILLIMETERS AND A SPECIFIC GRAVITY OF AT LEAST ABOUT 1.1, BY PASSING WASTE WATER UPWARDLY THROUGH SAID BED AT A FLOW RATE OF AT LEAST ABOUT 6 GALLONS PER MINUTE PER SQUARE FOOT OF BED TO BUOY THE PARTICLES TO OVERCOME THE INFLUENCE OF GRAVITY AND TO IMPART TO SAID BED PARTICLES MOVEMENT WITHIN THE BED; (B) PROVIDING SUFFICIENT AMOUNTS OF A CARBON SOURCE IN SAID WASTE WATER TO ALLOW SAID NITRIFIED WASTES TO BE CONVERTED TO NITROGEN BY SAID BIOTA; (C) MAINTAINING SAID BED AT A TEMPERATURE SUFFICIENT TO PERMIT BIOTA ACTIVITY; AND (D) REMOVING EXCESS BIOTA GROWTH FORMED ON SAID CARRIER DURING SAID PROCESS SUCH THAT SIGNIFICANT QUANTITIES AND GENERALLY GREATER THAN ABOUT 90% BY WEIGHT OF SAID NITRIFIED WASTE IS REDUCED FROM A VOLUME OF WASTE WATER TREATED IN SAID BED IN ABOUT 10 MINUTES OR LESS AND FLOC PRODUCED BY REMOVAL OF EXCESS GROWTH IS CARRIED FROM THE PROCESS WITHOUT INTERFERENCE WITH THE EFFECIENT OPERATION THEREOF.

Claims

1. PROCESS FOR DENITRIFYING WASTE WATER CONTAINING NITRIFIED WASTE PASSING THE WASTE WATER THROUGH A BED OF MICROORGANISMS, SAID BED ADAPTED TO PASS SUSPENDED SOLIDS PRESENT IN SAID WASTE THERETHROUGH, COMPRISING:

(A) GENERATING AN UPFLOW FLUIDIZED BED OF DENITRIFYING BIOTA, SAID BIOTA ATTACHED TO A SOLID PARTICULATE CARRIER, SAID CARRIER HAVING A PARTICLE SIZE FROM ABOUT 0.2 TO 3 MILLIMETERS AND A SPECIFIC GRAVITY OF AT LEAST ABOUT 1.1, BY PASSING WASTE WATER UPWARDLY THROUGH SAID BED AT A FLOW RATE OF AT LEAST ABOUT 6 GALLONS PER MINUTE PER SQUARE FOOT OF BED TO BUOY THE PARTICLES TO OVERCOME THE INFLUENCE OF GRAVITY AND TO IMPART TO SAID BED PARTICLES MOVEMENT WITHIN THE BED;

(B) PROVIDING SUFFICIENT AMOUNTS OF A CARBON SOURCE IN SAID WASTE WATER TO ALLOW SAID NITRIFIED WASTES TO BE CONVERTED TO NITROGEN BY SAID BIOTA;

(C) MAINTAINING SAID BED AT A TEMPERATURE SUFFICIENT TO PERMIT BIOTA ACTIVITY;

AND (D) REMOVING EXCESS BIOTA GROWTH FORMED ON SAID CARRIER DURING SAID PROCESS SUCH THAT SIGNIFICANT QUANTITIES AND GENERALLY GREATER THAN ABOUT 90% BY WEIGHT OF SAID NITRIFIED WASTE IS REDUCED FROM A VOLUME OF WASTE WATER TREATED IN SAID BED IN ABOUT 10 MINUTES OR LESS AND FLOC PRODUCED BY REMOVAL OF EXCESS GROWTH IS CARRIED FROM THE PROCESS WITHOUT INTERFERENCE WITH THE EFFECIENT OPERATION THEREOF.