Alan H Molof

US Patent:

20010045390, Nov 29, 2001

Filed:

Feb 23, 2001

Appl. No.:

09/792493

Inventors:

Sungtai Kim - Wayne NJ, US
Alan Molof - New City NY, US

International Classification:

C02F003/30
C02F003/00

US Classification:

210/605000, 210/609000, 210/621000, 210/623000, 210/630000

Abstract:

A wastewater treatment process providing nitrogen, phosphorus, biochemical oxygen demand (BOD) and suspended solids removal comprises the steps of: passing wastewater containing ammonia nitrogen, phosphate, BOD and suspended solids, said wastewater mixed with recycled activated sludge from a subsequent step, into a first anoxic zone therein reducing nitrate nitrogen from the recycled sludge to molecular nitrogen; passing effluent from the first anoxic zone to a first aerobic zone therein oxidizing at least a portion of the BOD and oxidizing at least a portion of the ammonia nitrogen to nitrate nitrogen; recycling a portion of the contents at the end of the first aerobic zone back to the first anoxic zone; passing the effluent of the first aerobic zone to a second anoxic zone; introducing volatile fatty acid such as acetic acid into the second anoxic zone therein releasing phosphorus into a liquid phase; passing effluent from the second anoxic zone including the volatile fatty acid to a second aerobic zone therein substantially absorbing phosphorus into biomass and removing and/or oxidizing ammonia nitrogen; passing effluent from the second anoxic zone to a final settling zone therein separating: (i) a purified wastewater having decreased nitrogen, phosphorus, BOD and suspended solids and (ii) a sludge containing suspended solids, phosphate and BOD; and recycling at least a portion of the sludge (ii) to the first anoxic zone. In another embodiment, at least a portion of the sludge (ii) is also recycled to the second anoxic zone. In yet another embodiment, the second anoxic zone is divided into a first section and a second section. In the first section, anoxic conditions are established and in the second section, volatile fatty acid is added after anoxic conditions have been established.

US Patent:

6113788, Sep 5, 2000

Filed:

Nov 12, 1998

Appl. No.:

9/191270

Inventors:

Alan H. Molof - New City NY
Sungtai Kim - Seoul, KR

Assignee:

Polytechnic University - Brooklyn NY

International Classification:

C02F 330

US Classification:

210605

Abstract:

A wastewater treatment process having improved solids separation characteristics and reduced biochemical oxygen demand (BOD) in the purified wastewater comprising the steps of: passing wastewater through a main aerobic biological oxidation zone and therein oxidizing a portion of the BOD a portion of the ammonia nitrogen content (NH. sub. 3 --N); passing the effluent from said aerobic biological oxidation zone to an aerobic/mixing zone and therein mixing said effluent with effluent from the anoxic/anaerobic zone; passing the effluent from said aerobic/mixing zone to a settling zone and therein separating purified wastewater having reduced BOD and suspended solids, and sludge containing suspended solids; passing a portion of the sludge formed in the settling zone and volatile acids to an anoxic/anaerobic zone and therein increasing the extracellular polymer content of said sludge, the release of phosphorus into solution and the reduction of nitrate nitrogen to molecular nitrogen gas; and recycling an effective amount of the effluent from said anoxic/anaerobic zone to said aerobic/mixing zone. In an alternative embodiment, a volatile acid is added to a zone to which no additional oxygen has been added that is in the flow path from the main aerobic biological oxidation zone or, alternatively, it may be added to the anoxic/anaerobic zone and the thus-treated effluent is passed to the aerobic/mixing zone wherein phosphate is removed from the effluent.

US Patent:

41982967, Apr 15, 1980

Filed:

Jul 10, 1978

Appl. No.:

5/922935

Inventors:

John J. Doumas - Wilton CT
Alan H. Molof - New City NY
Gordon H. Raymond - Southington CT
Lee Wikstrom - Pomona NY

Assignee:

Consolidated Foods Corporation - Old Greenwich CT

International Classification:

B01D 1504

US Classification:

210 29

Abstract:

This invention relates to the discovery that chemicals existing in natural waters, which have been pretreated in municipal water treatment facilities, as well as natural surface and underground waters which have not been so pretreated, do inhibit the biocidal effect of known water disinfectants of the metallic ion type. This may be overcome by exchanging for the halide ions in such water an anion, such as bicarbonates, which does not inhibit the biocidal effect of metallic ions, nor does it react chemically with known oxidizing biocides to form halogenated organics which are suspected of causing cancer. Further, water treated in accordance with this invention substantially maintains its original ionic character to maintain the water in a natural state, for example, not deionized. In accordance with another aspect of the invention, water which has been municipally treated with oxidizing biocides and may contain halogenated organics is pretreated to remove the halogenated organics prior to the removal of halides referred to above.

US Patent:

56518919, Jul 29, 1997

Filed:

Dec 22, 1995

Appl. No.:

8/577821

Inventors:

Alan H. Molof - New City NY
Sungtai Kim - Seoul, KR

Assignee:

Polytechnic University - Brooklyn NY

International Classification:

C02F 330

US Classification:

210605

Abstract:

A wastewater treatment process having improved solids separation characteristics and reduced biochemical oxygen demand (BOD) in the purified wastewater comprising the steps of: passing wastewater containing suspended solids and biodegradable organic substances through a main aerobic biological oxidation zone; passing the effluent from said aerobic biological oxidation zone to an aerobic/mixing zone and therein mixing said effluent with effluent from the anoxic/anaerobic zone; passing the effluent from said aerobic/mixing zone to a settling zone and therein separating purified wastewater and sludge containing suspended solids; passing a portion of the sludge formed in the settling zone and volatile acids to an anoxic/anaerobic zone; and recycling an effective amount of the effluent from said anoxic/anaerobic zone to said aerobic/mixing zone. In an alternative embodiment, a volatile acid is added to a zone to which no additional oxygen has been added that is in the flow path from the main aerobic biological oxidation zone or, alternatively, it may be added to the anoxic/anaerobic zone and the thus-treated effluent is passed to the aerobic/mixing zone wherein phosphate is removed from the effluent.

US Patent:

51280400, Jul 7, 1992

Filed:

Aug 2, 1989

Appl. No.:

7/388955

Inventors:

Alan H. Molof - New York NY
Zuwhan Yun - Seoul, KR

Assignee:

Polytechnic University - Brooklyn NY

International Classification:

C02F 330

US Classification:

210605

Abstract:

A wastewater treatment process having improved solids separation characteristics and reduced biochemical oxygen demand (BOD) in the purified wastewater comprising the steps of: passing wastewater containing suspended solids and biodegradable organic substances through an aerobic biological oxidation zone and therein oxidizing a portion of the BOD and converting a portion of the BOD into additional suspended solids; passing the effluent from said aerobic biological oxidation zone to an aerobic/mixing zone and therein mixing said effluent with effluent from the anoxic/anaerobic zone; passing the effluent from said aerobic/mixing zone to a settling zone and therein separating purified wastewater having reduced BOD and suspended solids, and sludge containing suspended solids; passing a portion of the sludge formed in the settling zone to an anoxic/anaerobic zone and therein increasing the extracellular polymer content of said sludge; and recycling an effective amount of the effluent from said anoxic/anaerobic zone to said aerobic/mixing zone.

US Patent:

58535888, Dec 29, 1998

Filed:

Feb 3, 1997

Appl. No.:

8/794660

Inventors:

Alan H. Molof - New City NY
Zuwhan Yun - Seoul, KR
Sungtai Kim - Seoul, KR

Assignee:

Polytechnic University - Brooklyn NY

International Classification:

C02F 330

US Classification:

210605

Abstract:

A wastewater treatment process having improved solids separation characteristics and reduced biochemical oxygen demand (BOD) in the purified wastewater comprising the steps of: passing wastewater containing suspended solids and biodegradable organic substances through a main aerobic biological oxidation zone; passing the effluent from said aerobic biological oxidation zone to an aerobic/mixing zone and therein mixing said effluent with effluent from the anoxic/anaerobic zone; passing the effluent from said aerobic/mixing zone to a settling zone and therein separating purified wastewater and sludge containing suspended solids; passing a portion of the sludge formed in the settling zone and volatile acids to an anoxic/anaerobic zone; and recycling an effective amount of the effluent from said anoxic/anaerobic zone to said aerobic/mixing zone. In an alternative embodiment, a volatile acid is added to a zone to which no additional oxygen has been added that is in the flow path from the main aerobic biological oxidation zone or, alternatively, it may be added to the anoxic/anaerobic zone and the thus-treated effluent is passed to the aerobic/mixing zone wherein phosphate is removed from the effluent.

US Patent:

57334552, Mar 31, 1998

Filed:

Nov 7, 1994

Appl. No.:

8/335203

Inventors:

Alan H. Molof - New City NY
Zuwahn Yun - Seoul, KR

Assignee:

Polytechnic University - Brooklyn NY

International Classification:

C02F 330

US Classification:

210605

Abstract:

A wastewater treatment process having improved solids separation characteristics and reduced biochemical oxygen demand (BOD) in the purified wastewater comprising the steps of: passing wastewater containing suspended solids and biodegradable organic substances through a main aerobic biological oxidation zone and therein oxidizing a portion of the BOD and converting a portion of the BOD into additional suspended solids and at least a portion of the ammonia nitrogen content (NH. sub. 3 --N) of the wastewater is oxidized to nitrate nitrogen (NO. sub. 3 13 N); passing the effluent from said aerobic biological oxidation zone to an aerobic/mixing zone and therein mixing said effluent with effluent from the anoxic/anaerobic zone; passing the effluent from said aerobic/mixing zone to a settling zone and therein separating purified wastewater having reduced BOD and suspended solids, and sludge containing suspended solids; passing a portion of the sludge formed in the settling zone and volatile acids to an anoxic/anaerobic zone and therein increasing the extracellular polymer content of said sludge, the release of phosphorus into solution and the reduction of nitrate nitrogen to molecular nitrogen gas; and recycling an effective amount of the effluent from said anoxic/anaerobic zone to said aerobic/mixing zone.

Author:

Alan H. Molof

ISBN #:

0897662563

Author:

Alan Molof

ISBN #:

0897662571