Removal of pollutants from waste-water

Claim 1

A METHOD FOR TREATING WASTEWATER INCLUDING AT LEAST ABOUT 10 MG/LITER OF AMMONIA NITROGEN AND AT LEAST ABOUT 100 MG/LITER OF CARBONACEOUS POLLUTANTS, EXPRESSED AS BOD5, COMPRISING THE STEPS OF SUPPLYING SAID WASTEWATER TO FIRST BIOLOGICAL TREATMENT NIT, BIOCHEMICALLY OXIDIZING FROM ABOUT 85 TO 95% BOD5 IN SAID FIRST BIOLOGICAL TREATMENT UNIT, BIOCHEMICALLY OXIDIZING AT LEAST ABOUT 20% AND LESS THAN ABOUT 50% OF SAID AMMONIA NITROGEN IN SAID FIRST BIOLOGICAL TREATMENT UNIT TO FROM OXIDIZED NITROGENOUS COMPOUNDS WHILE CONSERVING AT LEAST 50% OF SAID AMMONIA NITROGEN, SUPPLYING WASTEWATER EFFLUENT FROM SAID FIRST BIOLOGICAL TREATMENT UNIT TO BIOLOGICAL TREATMENT UNIT A PREDETERMINED RATE, SAID SECOND BIOLOGICAL TREATMENT UNIT INCLUDING A PLURALTIY OF ROTABLE CONTACTORS HAVING SURFACE AREA FOR THE GROWTH AND MAINTENANCE OF DENITRIFYING ORGANISMS, SAID PREDETERMINED RATE BEING FROM ABOUT 1 TO ABOUT 4 GALLONS PER DAY PER SQUARE FOOT OF SAID SURFACE AREA, SAID CONTACTORS BEING AT LEAST PARTIALLY SUBMERGED IN SAID WASTEWATER, SAID WASTEWATER HAVING A TEMPERATURE FROM ABOUT 53*F. TO ABOUT 80*F. AND A PH FROM ABOUT 6 TO ABOUT 8 IN SAID SECOND BIOLOGICAL TREATMENT UNIT, ROTATING SAID CONTACTORS IN SAID WASTEWATER AT A PERIPHERAL VELOCITY

Claim 2

A METHOD FOR TREATING WASTEWATER INCLUDING AT LEAST ABOUT 10 MG/LITER OF AMMONIA NITROGEN AND AT LEAST ABOUT 100 MG/LITER OF CARBONACEOUS POLLUTANTS, EXPRESSED AS BOD5, COMPRISING THE STEPS OF SUPPLYING SAID WASTEWATER TO FIRST BIOLOGICAL TREATMENT NIT, BIOCHEMICALLY OXIDIZING FROM ABOUT 85 TO 95% BOD5 IN SAID FIRST BIOLOGICAL TREATMENT UNIT, BIOCHEMICALLY OXIDIZING AT LEAST ABOUT 20% AND LESS THAN ABOUT 50% OF SAID AMMONIA NITROGEN IN SAID FIRST BIOLOGICAL TREATMENT UNIT TO FROM OXIDIZED NITROGENOUS COMPOUNDS WHILE CONSERVING AT LEAST 50% OF SAID AMMONIA NITROGEN, SUPPLYING WASTEWATER EFFLUENT FROM SAID FIRST BIOLOGICAL TREATMENT UNIT TO BIOLOGICAL TREATMENT UNIT A PREDETERMINED RATE, SAID SECOND BIOLOGICAL TREATMENT UNIT INCLUDING A PLURALTIY OF ROTABLE CONTACTORS HAVING SURFACE AREA FOR THE GROWTH AND MAINTENANCE OF DENITRIFYING ORGANISMS, SAID PREDETERMINED RATE BEING FROM ABOUT 1 TO ABOUT 4 GALLONS PER DAY PER SQUARE FOOT OF SAID SURFACE AREA, SAID CONTACTORS BEING AT LEAST PARTIALLY SUBMERGED IN SAID WASTEWATER, SAID WASTEWATER HAVING A TEMPERATURE FROM ABOUT 53*F. TO ABOUT 80*F. AND A PH FROM ABOUT 6 TO ABOUT 8 IN SAID SECOND BIOLOGICAL TREATMENT UNIT, ROTATING SAID CONTACTORS IN SAID WASTEWATER AT A PERIPHERAL VELOCITY

Claim 9

A method for treating wastewater including at least about 10 mg/liter of ammonia nitrogen and at least about 100 mg/liter of carbonaceous pollutants, expressed as BOD5 comprising the steps of a. supplying said wastewater to a first biological treatment unit at a first predetermined rate, b. said first biological treatment unit including a first plurality of rotatable biological contactors having first surface area for the growth and maintenance of biological slimes, said contactors being partially submerged in said wastewater, c. rotating said first plurality of biological contactors at a first predetermined peripheral velocity to alternately expose said surface area to said wastewater and an oxygen containing atmosphere and grow aerobic biological slimes, d. said aerobic biological slimes biochemically oxidizing from about 85 to about 95% of said BOD5, e. said aerobic biological slimes biochemically oxidizing at least about 20% and less than about 50% of said ammonia nitrogen to form oxidized nitrogenous compounds, f. conserving at least 50% of said ammonia nitrogen in said first biological treatment unit, g. said first predetermined rate being from about 1 to about 5 gallons per day per square foot of said first surface area, h. said first predetermined peripheral velocity being from about 0.5 to about 2 ft/sec, i. removing effluent wastewater from said first biological treatment unit, j. said effluent wastewater containing at least about 5 mg/liter of oxidized nitrogenous compounds and at least about 5 mg/liter of ammonia nitrogen, k. supplying said effluent wastewater to a second biological treatment unit at a second predetermined rate, l. said second biological treatment unit including a second plurality of rotatable biological contactors at least partially submerged in said wastewater and having second surface area for the growth and maintenance of denitrifying biological slimes, m. rotating said second plurality of biological contactors at a second predetermined peripheral velocity to grow and maintain denitrifying biological slimes on said second surface area, n. excluding molecular oxygen from said denitrifying organisms, o. said denitrifying biological slimes biochemically oxidizing conserved ammonia nitrogen utilizing oxidized nitrogenous compounds as an oxygen source, p. said second predetermined rate being from about 1 to about 4 gallons/day/square foot of said second surface area, q. said second predetermined peripheral velocity being from about 0.5 to about 1 ft/sec, r. the content of soluble carbonaceous matter in said second biological treatment unit consisting solely of residual carbonaceous matter from said first biological treatment unit, s. said wastewater in said second biological treatment unit having a temperature from about 53*F. to about 80*F. and a pH from about 6 to about 8, and t. removing said wastewater from said second biological treatment unit.

Claim 10

A method for treating wastewater including at least about 10 mg/liter of ammonia nitrogen and at least about 100 mg/liter of carbonaceous pollutants, expressed as BOD5 comprising the steps of a. supplying said wastewater to a first biological treatment unit at a first predetermined rate, b. said first biological treatment unit including a first plurality of rotatable biological contactors having first surface area for the growth and maintenance of biological slimes, said contactors being partially submerged in said wastewater, c. rotating said first plurality of biological contactors at a first predetermined peripheral velocity to alternately expose said surface area to said wastewater and an oxygen containing atmosphere and grow aerobic biological slimes, d. said aerobic biological slimes biochemically oxidizing from about 85 to about 95% of said BOD5, e. said aerobic biological slimes biochemically oxidizing at least about 20% and less than about 50% of said ammonia nitrogen to form oxidized nitrogenous compounds, f. conserving at least 50% of said ammonia nitrogen in said first biological treatment unit, g. said first predetermined rate being from about 1 to about 5 gallons per day per square foot of said first surface area, h. said first predetermined peripheral velocity being from about 0.5 to about 2 ft/sec, i. removing effluent wastewater from said first biological treatment unit, j. said effluent wastewater containing at least about 5 mg/liter of oxidized nitrogenous compounds and at least about 5 mg/liter of ammonia nitrogen, k. supplying said effluent wastewater to a second biological treatment unit at a second predetermined rate, l. said second biological treatment unit including a second plurality of rotatable biological contactors at least partially submerged in said wastewater and having second surface area for the growth and maintenance of denitrifying biological slimes, m. rotating said second plurality of biological contactors at a second predetermined peripheral velocity to grow and maintain denitrifying biological slimes on said second surface area, n. excluding molecular oxygen from said denitrifying organisms, o. said denitrifying biological slimes biochemically oxidizing conserved ammonia nitrogen utilizing oxidized nitrogenous compounds as an oxygen source, p. said second predetermined rate being from about 1 to about 4 gallons/day/square foot of said second surface area, q. said second predetermined peripheral velocity being from about 0.5 to about 1 ft/sec, r. the content of soluble carbonaceous matter in said second biological treatment unit consisting solely of residual carbonaceous matter from said first biological treatment unit, s. said wastewater in said second biological treatment unit having a temperature from about 53*F. to about 80*F. and a pH from about 6 to about 8, and t. removing said wastewater from said second biological treatment unit.