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91. 发明专利

JPH1110191A DEVICE FOR BIOLOGICALLY REMOVING PHOSPHORUS 失效
公开(公告)号：JPH1110191A
公开(公告)日：1999-01-19
申请号：JP16422897
申请日：1997-06-20
申请人： KURITA WATER IND LTD
发明人： FUKASE TETSURO , SHIBATA MASAHIDE , OYAMA AKIO , TAKEUCHI TADAO
IPC分类号： C02F3/12 , C02F1/58 , C02F3/30
摘要： PROBLEM TO BE SOLVED: To improve removal efficiencies of phosphorus by a method wherein sludge solubilized by a sludge solubilizing means, into which a part of return sludge is introduced, is returned to an aeration tank and a part of the return sludge is fed into a phosphorus discharge tank and an effluent of the phosphorus discharge tank is admitted into a magnesium ammonium phosphate reaction tower. SOLUTION: In an anerobic tank 1 into which raw water is introduced, activated sludge is caused to ingest organic matters in raw water and anaerobic liquid is introduced into a denitrification tank 2 and denitrification liquid is then fed into aerobic tanks 3, 4 to effect aerobic treatment, causing oxidative decomposition of organic matters. And in the tank 1, phosphorus discharged from sludge is taken in so that aerobic treating liquid returns a part of the phosphorus to the tank 2 as circulation liquid, while the remainder is solid-liquid separated at a settling tank 5. And a part of separated sludge is introduced into the tank 1 or a solubilizing tank 6, where ozone gas is blown in to effect solubilizing treatment. The treated liquid is sent to a discharge tank 7 to discharge phosphorus to the side of liquid under anaerobic conditions and then in the magnesium ammonium phosphate(MAP) reaction tower 9, MAP is produced and deposited to remove phosphorus in the liquid.

92. 发明专利

JPH10146597A METHOD FOR ANAEROBIC TREATMENT AND CARRIER 失效
公开(公告)号：JPH10146597A
公开(公告)日：1998-06-02
申请号：JP30970596
申请日：1996-11-20
申请人： KURITA WATER IND LTD
发明人： KITAGAWA MIKIO , FUKASE TETSURO
IPC分类号： C02F3/06 , C02F3/28
摘要： PROBLEM TO BE SOLVED: To improve anaerobic treating ability by eluting cobalt, nickel, etc., by the irreducible minimum of a requirement by a method wherein anaerobic bacteria are stuck to a carrier wherein cobalt, nickel, or their compound are supported on a base material, and anaerobic treatment is carried out. SOLUTION: Anaerobic treatment is carried out by sticking anaerobic bacteria to a carrier wherein cobalt, nickel, or their compound are supported on a base material. In order to stick the anaerobic bacteria, in a treating process by a fixed bed method, a fluidized bed method, UASB, etc., the carrier is used to be brought in contact with an organic discharge liquid. By treatment under an anaerobic state, the anaerobic bacteria are stuck onto the carrier and propagated. As the base material constituting the carrier, if only the anaerobic bacteria can be stuck to a material, and nickel, cobalt, etc., can be supported therewith, the material can be freely used. Either an inorganic material of zeolite, etc., or an organic material of plastics, etc., satisfies the purpose. Further, a shape of the base material and its size (particle size) can be arbitrarily selected according to a treating system.

93. 发明专利

JPH1085515A FILTRATION DEVICE 失效
公开(公告)号：JPH1085515A
公开(公告)日：1998-04-07
申请号：JP24166896
申请日：1996-09-12
申请人： KURITA WATER IND LTD
发明人： TANAKA TOMOAKI , FUKASE TETSURO , WATANABE ATSUSHI
IPC分类号： C02F3/06 , B01D24/00 , B01D29/62 , B01D29/66
摘要： PROBLEM TO BE SOLVED: To promote peeling of sludge at the time of cleaning a filtration layer to enhance cleaning effect by forming the filtration layer consisting of a floating filtering medium at the lower side of a filtering medium support part, in a filtration tower with the filtering medium support part formed at the top, and providing an air diffusion means at part of the filtration tower so that a gyrating current is generated at the time of cleaning the filtration layer. SOLUTION: When performing filtration treatment, a liquid to be treated is guided to the lower part of a filtration tower 1 from a passage 4 for the liquid to be treated and a turbid matter is uptake from the liquid to be treated by the filtration layer 3. The filtrate passes through a filtering medium support part 2, entering a liquid storage part 7. Further, the filtrate passes through a filtrate passage 9 to be stored in a storage tank 10 and then is delivered into a filtrate passage 12. When cleaning the filtration layer 3, the filtrate contained in the storage tank 10 is drained from a drain passage 6 while being sent to the liquid storage part 7, so that a turbid matter sludge is washed out. In addition, air is diffused in some area, e.g. an area A. If this air diffusion is performed with an air diffusion device 5a, the downward flow of a cleaning liquid is inhibited. On the other hand, the downward current is formed in an area B in which the air diffusion does not take place, so that a filtering medium is engulfed into a gyrating current to peel the sludge.

94. 发明专利

JPH09206786A ANAEROBIC TREATMENT AND APPARATUS THEREFOR 失效
公开(公告)号：JPH09206786A
公开(公告)日：1997-08-12
申请号：JP1912896
申请日：1996-02-05
申请人： KURITA WATER IND LTD
发明人： YODA MOTOYUKI , FUKASE TETSURO , NISHIKAWA SHOZO
IPC分类号： C02F3/28 , C02F11/04
摘要： PROBLEM TO BE SOLVED: To provide an anaerobic treatment method for an org. waste liquid capable of shortening stagnation time even if an anaerobic treatment is executed with high load with the waste liquid contg. solid org. matter and executing the volumetric reduction of the sludge at a low energy consumption rate and inexpensively by the simple device and operation capable of reducing the volume of the formed sludge and an apparatus therefor. SOLUTION: The in-vessel liquid 11 is withdrawn from an acid forming vessel 1 and is subjected to sepn. of solid from the liquid in a member separator 2. Part 6 of the thickened sludge is returned to the acid forming vessel 1 and other part 18 is introduced to a reforming vessel 3, such as heat treating vessel, ozone treating vessel or high-voltage pulse discharge treating vessel by which the sludge is reformed to easily decomposable sludge. This sludge is returned to the acid forming vessel 1 and is subjected to the anaerobic treatment. The volume of the generated sludge is reduced. The separated liquid of the membrane separator 2 is subjected to high-speed methane fermentation in a high-load methane fermentation vessel 4.

95. 发明专利

JPH09187790A METHOD FOR TREATING SELENIUM-CONTAINING WATER 失效
公开(公告)号：JPH09187790A
公开(公告)日：1997-07-22
申请号：JP36896
申请日：1996-01-05
申请人： KURITA WATER IND LTD
发明人： KAWACHI TORU , FUKASE TETSURO
IPC分类号： C02F1/58 , C02F3/28 , C02F3/34
摘要： PROBLEM TO BE SOLVED: To remove a selenium compound stably and effectively by bringing selenium containing water into contact with biological sludge in the anarobic state under the presence of metallic iron. SOLUTION: Selenium containing water from a raw water path 10 is introduced together with return sludge from a return sludge path 11 into a denitrification tank 1, and iron powder is fed from an iron powder feed path 12. Simultaneously, nitrate (nitrite) is introduced from a nitrate (nitrite) feed path 13 and organic matters such as methanol are introduced from an orgnaic matter feed path 14, and agitated by an agitator 15 and mixed, and denitrified under the anaerobic state. Then the denitrified matters are transferred to an anaerobic treatment tank 2 and anaerobically treated while being agitated by an agitator 17. A selenium compound is reduced by the arrangement, and undissolved selenium is adsorbed by biological sludge and turned into sludge. Solid-liquid separation is carried out in solid-liquid separation tank 3, and alkali is added into separated liquid from an alkali feed line 22. Then the sludge is flocculated in a flocculating tank 4 to form iron flocks, and residual selenium is fed in. Then the solid-liquid separation is carried out in the solid-liquid separation tank 5.

96. 发明专利

JPH09117800A BIOLOGICAL TREATMENT OF ORGANIC WASTE WATER 失效
公开(公告)号：JPH09117800A
公开(公告)日：1997-05-06
申请号：JP27797395
申请日：1995-10-25
申请人： KURITA WATER IND LTD
发明人： FUKASE TETSURO
IPC分类号： C02F3/00 , C02F3/12 , C02F11/00 , C02F11/02
摘要： PROBLEM TO BE SOLVED: To reduce the volume of a surplus sludge and to prevent the degradation of treated water quality such as the increase of chromatility and COD and also to obtain q highly treated water quality. SOLUTION: In an aerobic treating method in which liq. 13 to be treated is introduced to an aeration tank 11 together with a return sludge 14 to subject the liq. to an aerobic biological treatment, and this liq. is concentrated in a concentrating device 12, and a part of a concentrated sludge is returned to the aeration tank 11 as the return sludge 14, a part of the concentrated sludge is returned to the aeration tank 11 after introducing the part of the concentrated sludge to a solubilizing vessel 21 and executing a solubilizing treatment of the sludge by heat treating the sludge under the presence of a surfactant.

97. 发明专利

JPH09108699A TREATMENT OF ORGANIC SLUDGE 失效
公开(公告)号：JPH09108699A
公开(公告)日：1997-04-28
申请号：JP27258095
申请日：1995-10-20
申请人： KURITA WATER IND LTD
发明人： FUKASE TETSURO
IPC分类号： C02F3/34 , C02F11/00 , C02F11/02
摘要： PROBLEM TO BE SOLVED: To effectively remove nitrogen and phosphorus eluted from sludge in a digestion and reducing quantity process. SOLUTION: After organic sludge is subjected to digestion treatment, it is subjected to biological nitrification treatment and then ammonium magnesium phosphate is formed, and after is removed, ammonium nitrite is thermally decomposed. Therefore, when digestion treated liquid of organic sludge is subjected to nitrification treatment, nitrification is stopped at the time when nitrification reaches half thereof, and a half quantity of the whole ammoniacal nitrogen remains as nitrite nitrogen and the remaining half thereof remains as it is. By forming MPA after nitrification treatment, ammonium ions and phosphorus in liquid are made insoluble as MAP. By removing this insoluble material, ammoniacal nitrogen and phosphrus are removed. After that, by thermally decomposing ammonium magnesium phosphate, ammoniacal nitrogen and nitrite nitrogen are removed.

98. 发明专利

JPH08299995A TREATMENT OF ORGANIC WASTE LIQUID 失效
公开(公告)号：JPH08299995A
公开(公告)日：1996-11-19
申请号：JP11345695
申请日：1995-05-11
申请人： KURITA WATER IND LTD
发明人： SHIBATA MASAHIDE , FUKASE TETSURO
IPC分类号： C02F3/02 , C02F3/12 , C02F3/28 , C02F11/02 , C02F11/06
摘要： PURPOSE: To provide a treating method of an org. waste liquid capable of reducing an ozone consumption and also reducing a volume of a surplus sludge without undesirable influence to a biologically treating stage and also capable of increasing a digesting efficiency and making a sludge amount approach to zero. CONSTITUTION: The org. waste liquid 11 is subjected to a biological treatment at the biologically treating stage containing a biologically treating tank 1 and a solid-liq. separating tank 2, and a generated surplus sludge 16 is digested at a sludge digesting stage containing a sludge digesting tank 3 and the solid-liq. separating tank 4. A part of a digested sludge 21 is circulated to the digesting tank 3 as a circulating sludge 17, and the part of the digested sludge 21 is subjected to an ozone treatment at an ozone treating tank 5 as a drawn sludge 22, and the ozone treated sludge 24 is circulated to the digesting tank 3.

99. 发明专利

JPH07116687A CONTROLLING METHOD FOR FILAMENTOUS BULKING 失效
公开(公告)号：JPH07116687A
公开(公告)日：1995-05-09
申请号：JP26522993
申请日：1993-10-22
申请人： KURITA WATER IND LTD
发明人： KITATSUJI KATSURA , FUKASE TETSURO
IPC分类号： C02F3/12
摘要： PURPOSE:To control filamentous bulking of activated sludge without doing harm to bacteria except filamentous bacteria contained in activated sludge and to human and other animals by adding a cationic surfactant or an amphoteric surfactant having a primary to tertiary amino group to an activated sludge treatment system. CONSTITUTION:In an activated sludge treatment method, drainage is mixed with activated sludge and aerated in an aeration tank. Sludge is separated in a solid-liquid separation tank and separated liquid is discharged as treated water. On one side, a part of separated sludge is returned to the aeration tank as return sludge and the residue is discharged as excess sludge. There may be cases where filamentous bacteria such as sphaerotilus proliferate in the activated sludge and filamentous bulking is generated. A cationic surfactant or an amphoteric surfactant having a primary to tertiary amino group is added to an activated sludge treatment system to prevent such filamentous bulking. Thereby bulking is controlled by phenomena where filamentous bacteria in activated sludge are shrunk in a sheathlike body or fall from the sheathlike body and are made lytic.

100. 发明专利

JPH06262185A FORMATION OF FATTY ACID CALCIUM 失效
公开(公告)号：JPH06262185A
公开(公告)日：1994-09-20
申请号：JP5203493
申请日：1993-03-12
申请人： KURITA WATER IND LTD
发明人： NAKAMURA KOICHI , FUKASE TETSURO
IPC分类号： C02F1/58
摘要： PURPOSE:To provide a forming method for a fatty acid calcium capable of easily and efficiently solidifying a fatty acid salt dissolved in water as the fatty acid calcium even when many kinds of salt are dissolved. CONSTITUTION:In the method for forming the water-insoluble fatty acid calcium by adding a calcium compound into an aq. solution of fatty acid salt, after calcium chloride is added into the aq. solution of the fatty acid salt to be 6.5-7.5 in pH, the fatty acid calcium is formed by adding an alkali such as calcium hydroxide or sodium hydroxide.

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