PATENT ABSTRACTS 527

ment, iron ions are made to elute by utiiziing microorganism-corrosion on the outer surfaces of said iron contactor or contactors on condition that dissolved oxygen concentration in the treat- ment tank is 0 mg/l. Under the aerobic or anaerobic conditions, the iron ions eluting from the outer surfaces of said iron contactor or con- tactors are combined with ions of phosphoric acid in the waste water to thereby remove phosphorus in the waste water as insoluble salt of iron phosphate.

5098572

M E T H O D A N D A P P A R A T U S F O R I N C R E A S I N G S L U D G E

C O N C E N T R A T I O N I N W A T E R P U R I F I C A T I O N I N S T A L L A T I O N S

Gerard Faup, Jean-Marc Audic, Versailles, France assigned to Lyonnaise des Eaux

A method of treating water with activated sludge, comprising a process for depolluting said water including a stage in which carbon pollu- tion is oxidized, a nitrification stage which may optionally be associated with a denitrification state and/or a dephosphating stage, and a sludge ageing process. The method further includes a sludge concentration stage, said stage being per- formed upstream from the sludge ageing stage, said concentration being performed by phase separation using compressed air, e.g. in a flota- tion tank (3), and the concentrated sludge being recycled via the sludge ageing stage.

5100553

M E T H O D F O R T R E A T I N G O R G A N I C W A S T E BY M E T H A N E

F E R M E N T A T I O N

Tadashi Nomura, Mitsuo Kawase, Naoki Murata, Handa, Japan assigned to NGK In- sulators Ltd

Proliferation activity of methane bacteria in or- ganic waste water can be improved by main- taining the ratio of the amounts of nickel, iron and cobalt contained in the waste water to the BOD thereof to not lower than certain values, and various organic waste waters, such as waste liquor formed during the production of beer and the like, can be treated in a high BOD removal ratio of not lower than 90~o while maintaining a high BOD load of not lower than 10 kg/m3*day.

5100800

M I C R O O R G A N I S M F O R D E G R A D I N G T O X I C W A S T E

M A T E R I A L S

Charles Kulpa, Michael G Johnston

A microorganism is disclosed for degrading toxic waste materials into more environmentally acceptable materials. Processes for utilizing the microorganism in a sequencing batch reactor, and for treating industrial and municipal wastes, such as chemical waste landfill leachate and chemical process wastewater, are also disclosed.

5108924

P Y R I M I N E - P R O D U C I N G B A C T E R I A

Masanor Yamamoto, Toshio Nakayama, Osamu Fujii, Rie Okabe, Kaizuka, Japan as- signed to House Food Industrial Co Ltd

A novel pyrimine-producing strain belonging to genus Pseudomonas exhibits the following bac- teriological properties: denitrification reaction: negative; assimilation of carbon sources: D- arabinose: positive L-lysine: negative and a novel pyrimine-producing strain belonging to genus Pseudomonas exhibits the following bac- teriological properties: dentrification reaction: negative; assimilation of carbon sources: D- arabinose: positive L-lysine: positive These novel strains produce pyrimine in high yield and if the strains are cultured in a proper culture medium in the presence of an iron salt, a natural red dye, ferropyrimine, can be easily produced and directly be recovered from the culture medium.

5110459

S E P T A G E A N A E R O B I C T R E A T M E N T B A T C H

P R O C E S S I N G

Richard C Baxter assigned to B & B W/W Inc

A sequencing batch waste treatment facility with pretreatment mixing, blending and dilution, with post-treatment liquid effluent recirculation and with anaerobic sludge digestion wherein high biological oxygen demand (BOD) waste is treatedand reduced to an acceptable BOD level.