Marshall L Spector

40564657, Nov 1, 1977

Apr 12, 1976

5/676266

Marshall L. Spector - Allentown PA

Air Products and Chemicals, Inc. - Allentown PA

C02C 106

210 7

A modified activated sludge system is provided wherein BOD-containing wastewater and recycled sludge are initially admixed under anaerobic conditions in the substantial absence of oxygen or oxidizing agents and subsequently subjected to aeration and clarification. By the disclosed operation the selective production of non-bulking biomass is favored while effective removal of phosphates is obtained. By a further alternative modification, nitrates and nitrites are also removed by interposing an anoxic treating zone between the anaerobic zone and the aerating zone.

46505857, Mar 17, 1987

Apr 17, 1984

6/600586

Sun-Nan Hong - Emmaus PA
Marshall L. Spector - Allentown PA

Air Products and Chemicals, Inc. - Allentown PA

C02F 330

210605

Abnormally lowered reduction in the rate of phosphorus removal from influent wastewater in an activated sludge system, occurring particularly following periods of increase in flow rate of wastewater entering the system, is avoided by controlling the maximum F/M in that portion of the system in which oxidation is occurring so as not to exceed 0. 9 and maintaining a defined relation between the maximum and minimum F/M during any 24 hour operating period.

51820218, Jan 26, 1993

Dec 16, 1991

7/808091

Marshall L. Spector - Emmaus PA

Lehigh University - Bethlehem PA

C02F 330

210605

A method is disclosed for attaining concurrent biological nitrification and dentrification in an aerobic zone of an activated sludge treatment plant. The method comprises aerating a mixed liquor in an aerobic stage of a secondary treatment zone to attain nitrification of ammonia values to NO. sub. x, transferring the mixed liquor to a settling zone where activated sludge is allowed to settle from the mixed liquor, transferring at least a portion of the sludge to an anaerobic sludge holding zone where it is held for a prolonged period, and returning the aged sludge from the sludge holding zone to the secondary treatment zone for mixing with influent wastewater. By holding the sludge in the sludge holding zone for a prolonged period, a culture of organisms is developed which exhibits an oxygen respiration block in the presence of NO. sub. x. When returned to the aerobic zone where nitrification is achieved, these organisms utilize the NO. sub. x being formed as an electron acceptor to metabolize sorbed BOD and to discharge the respiratory block.

47311851, Mar 15, 1988

Jul 12, 1983

6/513194

Michael S. K. Chen - Zionsville PA
Marshall L. Spector - Allentown PA

Air Products and Chemicals, Inc. - Allentown PA

C02F 330

210605

A modified activated sludge system is provided wherein wastewater containing BOD. sub. 5 and phosphate values is admixed in an initial zone with biomass-containing recycled sludge to form a mixed liquor under conditions effecting sorption of BOD. sub. 5 in the biomass. Subsequently, said mixed liquor is subjected to aeration in an oxidation zone under conditions for effecting oxidation of BOD. sub. 5, such that oxidizing agent is incorporated into the oxidation zone at a rate not substantially exceeding the rate of oxidation. By such operation, considerable savings in power requirements for oxygen transfer to the mixed liquid are had, while developing and maintaining a dense non-bulking biomass having the properties of good removal of phosphate from the wastewater influent.

41621530, Jul 24, 1979

Jul 25, 1977

5/818786

Marshall L. Spector - Allentown PA

Air Products and Chemicals, Inc. - Allentown PA

C02C 106

71 12

An organic product material having a high nitrogen and phosphorous content is produced as the product of a biological system for the treatment of a BOD-containing influent which also contains phosphorous and fixed nitrogen. The biological treatment system comprises the reaction of a mixed liquor composed of an activated biomass and a BOD-containing influent initially under anaerobic conditions and thereafter treating such mixed liquor under oxic conditions. The treated material is then separated into a supernatant liquid in which the BOD is depleted and a dense, activated biomass. A portion of this biomass is employed in forming the mixed liquor for the initial anaerobic treatment, while the remaining portion of the biomass is recovered as product. The living biomass product can be used in the fermentation industries. Alternatively, the product can be used as such or further processed, e. g.

45526630, Nov 12, 1985

Jul 31, 1984

6/636208

Marshall L. Spector - Allentown PA
Sun-Nan Hong - Emmaus PA

Air Products and Chemicals, Inc. - Allentown PA

C02F 330

210605

The present invention provides for an improved method of operating an activated sludge system whereby a significant amount of ammoniacal nitrogen is removed in the BOD sorption zone, which does not later appear in the system as protein or NOX. The improved method for achieving said ammoniacal nitrogen removal comprises decreasing the ammoniacal nitrogen concentration of the mixed liquor in the oxidation zone to a point where the mixed liquor leaving the oxidation zone has an ammoniacal nitrogen concentration less than about 0. 3 ppm. Additionally, an overall F/M. sub. o ratio equal to or greater than about 0. 05 is maintained.

58207600, Oct 13, 1998

Jun 30, 1997

8/884722

Marshall L. Spector - Emmaus PA

Competitive Technologies of PA, Inc. - Bethlehem PA

C02F 326

210610

An activated sludge process for reducing the amount of N. sub. 2 O released to the atmosphere during biological oxidation of NH. sub. 3, includes the following steps: mixing wastewater influent containing NH. sub. 3 and BOD with activated sludge to provide a mixed liquor in a first enclosed aerobic treatment zone wherein an oxygen containing gas is introduced, the first enclosed aerobic treatment zone having two or more stages in which gas and liquor phases are staged and oxygen is transferred to the liquid phase and BOD is metabolized and NH. sub. 3 is oxidized to NOx and N. sub. 2 O, wherein the pN. sub. 2 O is maintained at a level greater than 2 mm Hg; transferring the mixed liquor and gas to a second enclosed treatment zone having two or more stages, in which gas and liquid phases are staged, and wherein NOx and N. sub. 2 O are reduced to N. sub. 2 and an effluent gas is released to the atmosphere; transferring the mixed liquor to a settling zone wherein the activated sludge is separated from the mixed liquor to form a dense sludge and a clear supernatant; and returning at least a portion of the dense sludge to the enclosed aerobic treatment zone.

42710260, Jun 2, 1981

Oct 9, 1979

6/083196

Michael S. Chen - Macungie PA
Eugene J. Greskovich - Allentown PA
Marshall L. Spector - Allentown PA

Air Products and Chemicals, Inc. - Allentown PA

C02F 330

210605

An improved method of operating an activated biomass process wherein influent and activated biomass are initially contacted under anaerobic conditions to form a mixed liquor, the mixed liquor is subsequently oxygenated, thereafter activated biomass is separated from the mixed liquor and at least a portion of the separated biomass is introduced into the initial contacting step. The improved method comprises maintaining both the F/M ratio and the BOD/P ratio within particular ranges, preferably relative to each other.