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41. 发明专利

JP2000140867A TREATMENT OF WATER CONTAINING COD COMPONENT 失效
公开(公告)号：JP2000140867A
公开(公告)日：2000-05-23
申请号：JP32079798
申请日：1998-11-11
申请人： KURITA WATER IND LTD
发明人： JOKO ISAO , OYAMA AKIO
IPC分类号： C02F1/78 , B01J29/072
摘要： PROBLEM TO BE SOLVED: To effectively perform the oxidative-decomposition/removal of COD components in water by using a catalyst which comprises a catalyst carrier formed from an inorganic compound having cation exchange capability and contains metals in such an amount that satisfies specific relational expressions. SOLUTION: Oxidative-decomposition/removal of the COD component in water is effectively performed by bringing water containing a COD component into contact with a catalyst in the presence of ozone, wherein the catalyst is obtained by depositing nickel oxide and/or cobalt oxide on an inorganic compound carrier having ion exchange capability so as to satisfy a relational expression I, (CM+CK+CNa+2CCa)/(total ion exchange capacity of the carrier)

42. 发明专利

JPH0924400A METHOD FOR DEHYDRATING DIGESTED SLUDGE 失效
公开(公告)号：JPH0924400A
公开(公告)日：1997-01-28
申请号：JP17735295
申请日：1995-07-13
申请人： KURITA WATER IND LTD
发明人： HANAMI YUICHI , TAKEUCHI TADAO , OYAMA AKIO
IPC分类号： B01D21/01 , C02F11/14
摘要： PROBLEM TO BE SOLVED: To greatly improve the filtration rate of a dehydrating machine, such as belt press, at the time of a dehydration treatment of digested sludge, to decrease the amt. of the dehydrated cake obtd. by the treatment and the moisture content thereof and to reduce the number of the required units of the dehydrating machines and the disposition cost of the dehydrated cake. SOLUTION: The digested sludge is subjected to a flocculation treatment by adding a cation polymer thereto. The flocculated sludge is subjected to gravity dehydration. The gravity dehydrated sludge is tempered by adding an inorg. flocculating agent thereto. Amphoteric polymer is added to the tempered sludge and the sludge is dehydrated by the dehydrating machine. The digested sludge is subjected to the flocculation treatment by the cation polymer and, after the sludge is gravity dehydrated, the inorg. flocculating agent is added thereto and, therefore, the required amt. of the inorg. flocculating agent to be added is drastically decreased. The dehydratability of the sludge added with the inorg. flocculating agent is good and the filtration rate is improved. The moisture content of the dehydrated cake obtd. in such a manner is lowered.

43. 发明专利

JPH02198612A BIODEODORIZING DEVICE 失效
公开(公告)号：JPH02198612A
公开(公告)日：1990-08-07
申请号：JP1637989
申请日：1989-01-27
申请人： KURITA WATER IND LTD
发明人： TAKEUCHI TADAO , OYAMA AKIO , WATANABE KEISHIN
IPC分类号： B01D53/38 , B01D53/34 , B01D53/81
摘要： PURPOSE:To increase the amount of microbes supported with a packing layer and to improve the treatment capacity for malodor gas by concentrating and recovering the malodor gas decomposing microbes washed out of the packing layer with sprinkled water. CONSTITUTION:Malodor gas passes through the packing layer 2 formed by packing the carrier supporting the microbes decomposing malodor gas components in a treatment tower 1 to carry out deodorizing. In this case, water is sprinkled on the packing layer 2 by a sprinkling means 4, and the microbes included in the sprinkled water drained from the packing layer 2 where water is sprinkled by the sprinkling means 4 are concentrated by a membrane concentration means 6 using such as precise filter membranes. The microbes concentrated by the membrane concentration means 6 are returned to the packing layer 2 through a storage vessel 8, a pump 9 and a circulating pipe 10, etc. As a result, the amount of microbes supported by the packing layer is increased and the treating capacity for malodor gas is improved thereby.

44. 发明专利

JP2005177679A Dephosphorization method 有权
标题翻译：去磷化方法
公开(公告)号：JP2005177679A
公开(公告)日：2005-07-07
申请号：JP2003425073
申请日：2003-12-22
申请人： Kurita Water Ind Ltd , 栗田工業株式会社
发明人： OYAMA AKIO , SUMITA ICHIRO , SUNAHARA TAKASHIGE
IPC分类号： C02F1/58 , B01D9/02
摘要： PROBLEM TO BE SOLVED: To provide a dephosphorization method for removing phosphorus in posphorus-containing wastewater up to a low concentration at a high treatment speed by a fluidized bed type crystallization method. SOLUTION: Raw water containing phosphoric acid is passed through a reaction tank 2 filled with seed crystals, which are formed by precipitating calcium phosphate on the surface of calcium carbonate, as an ascending stream to form a fluidized bed of the seed crystals in the reaction tank 2 and phosphorus in raw water is removed as calcium phosphate crystals in the reaction tank 2 by adding a calcium compound and/or an alkali agent to raw water. A cylinder 9 opened at both ends is provided in the reaction tank 2 so that the axial direction is set to an up and down direction and at least the lower part is positioned in the fluidized bed F and a descending stream forming means 10 for forming a descending stream is provided in the cylinder 9. The particle size of the seed crystals is set to 0.2-0.5 mm, the passage LV of raw water in the reaction tank 2 is set to 20-25 m/h, SV is set to 5-10 h -1 and the T-P of inflow water to the reaction tank 2 is set to 6 mg/L or below to obtain treated water with T-P of 1 mg/L or below. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：待解决的问题：提供一种通过流化床型结晶法以高处理速度除去含磷酸盐废水中的磷至高浓度去除的脱磷方法。解决方案：将含有磷酸的原水通过填充有晶种的反应槽2，该晶种是通过在碳酸钙的表面上沉淀磷酸钙形成的，作为上升流，以形成晶种的流化床通过向原水中添加钙化合物和/或碱剂，反应槽2和磷在原料水中作为磷酸钙晶体除去。在反应罐2中设置有在两端开口的缸体9，使得轴向方向设定为上下方向，并且至少下部部件位于流化床F中，并且下降流形成装置10形成下降流提供在圆筒9中。晶种的粒径设定为0.2-0.5mm，反应槽2中的原水的通道LV设定为20-25m / h，SV设定为5 -10h -1 ，并将反应槽2的入流水的TP设定为6mg / L以下，得到TP为1mg / L以下的处理水。版权所有（C）2005，JPO＆NCIPI

45. 发明专利

JP2003190967A CRYSTALLIZATION AND DEPHOSPHORIZATION METHOD AND APPARATUS 审中-公开
公开(公告)号：JP2003190967A
公开(公告)日：2003-07-08
申请号：JP2001391514
申请日：2001-12-25
申请人： KURITA WATER IND LTD
发明人： SUMITA ICHIRO , OYAMA AKIO
IPC分类号： C02F1/58 , B01D9/02
摘要： PROBLEM TO BE SOLVED: To provide a crystallization and dephosphorization method in which reaction in a crystallization vessel is smoothly carried out by suppressing the deposition of calcium carbonate responding to the flow rate of the wastewater containing phosphorus to be introduced into the crystallization vessel, and also to provide an apparatus using the same. SOLUTION: This method comprises the steps of introducing the wastewater containing phosphorus into the crystallization vessel 1, and adding a calcium compound and/or an alkaline agent; forming the fluidized bed 1a of a crystal seed containing calcium phosphate, and contacting phosphorus in the wastewater with the crystal seed at the same time; and separating phosphorus in the wastewater as calcium phosphate. The amount of the calcium compound and/or the alkaline chemicals to be poured to the crystallization vessel 1 is feedforwardly controlled in accordance with the flow rate of the wastewater into the crystallization vessel 1. COPYRIGHT: (C)2003,JPO

46. 发明专利

JP2002045891A AGITATING DEVICE FOR BIOLOGICAL SLUDGE AND OZONE TREATING DEVICE 失效
公开(公告)号：JP2002045891A
公开(公告)日：2002-02-12
申请号：JP2000240052
申请日：2000-08-08
申请人： KURITA WATER IND LTD
发明人： OYAMA AKIO , SHIBATA MASAHIDE , FUKASE TETSURO
IPC分类号： C02F11/00 , B01F7/16 , C02F11/06
摘要： PROBLEM TO BE SOLVED: To provide an agitating device for biological sludge which is capable of stably continuing operation for a long period of time substantially free of the problem of the entanglement of fibers or the like, to disk turbine vanes and an ozone treating device. SOLUTION: There are provided the agitating device for the biological sludge which receives a biological sludge-containing liquid and agitates the biological sludge-containing liquid with a turbine vane agitating machine and the ozone treating device for the same. The turbine vane a the agitating machine is the disk turbine vane having a disk 1 and vanes 4 which are erected at the disk 1 and extend approximately in a radial direction. Margins 4A on the disk axial central sides of the vanes 4 are inclined to increasingly approach the disk axial center as nearer the disk surface.

47. 发明专利

JP2001334274A DEPHOSPHORIZATION METHOD 失效
公开(公告)号：JP2001334274A
公开(公告)日：2001-12-04
申请号：JP2000154923
申请日：2000-05-25
申请人： KURITA WATER IND LTD
发明人： OYAMA AKIO , SUMITA ICHIRO
IPC分类号： C02F1/58
摘要： PROBLEM TO BE SOLVED: To obtain high quality treated water with a PO4-P concentration of 1 mg/L or less by treating wastewater containing phosphorus in a low concentration of several-ten several mg/L as PO4-P at a high speed of SV=10-20 hr-1 SOLUTION: In treating phosphorus-containing wastewater by a fluidized bed type crystallization method, a distributor 5 for uniformly introducing phosphorus-containing wastewater is provided under the fluidized bed 4 of a reaction column 3 and a calcium compound is added so that Ca+2/PO4-P becomes 10-15 mol times and the pH in the reaction column 3 is controlled to 9-11.

48. 发明专利

JPH1128500A SLUDGE TREATING DEVICE 失效
公开(公告)号：JPH1128500A
公开(公告)日：1999-02-02
申请号：JP18237697
申请日：1997-07-08
申请人： KURITA WATER IND LTD
发明人： OYAMA AKIO
IPC分类号： C02F11/14
摘要： PROBLEM TO BE SOLVED: To effectively dehydrate anaerobic sludge and also to effectively remove and recover phosphorus. SOLUTION: Sludge, to which a cation polymer is added, is flocculated by a first flocculating means 1, and the flocculated sludge is concentrated by a gravity concentrating means 2. The concentrated sludge, to which an inorganic flocculant is added, is flocculated by a second flocculating means 3, and the flocculated sludge, to which an ampholytic polymer flocculant is added, is flocculated by a third flocculating means 4. The flocculated sludge is dehydrated by a dehydrating means 5. The separated water of the gravity concentrating means 2 is treated by a MPA (magnesium ammonium hydrogenphosphate) forming means 6. In this way, when after sludge is flocculated by the cation polymer and is concentrated by gravity, the inorganic flocculant is added, charge neutralization is completely performed, and by adding the ampholytic polymer after that, firm flocs can be formed, allowing the recovery efficiency and the dehydration efficiency of sludge to be markedly improved. By treating the separated water from the gravity concentrating means by the MAP forming means, phosphorus discharged from sludge can be effectively removed and recovered.

49. 发明专利

JPH09262599A DEPHOSPHORIZATION APPARATUS 失效
公开(公告)号：JPH09262599A
公开(公告)日：1997-10-07
申请号：JP7667196
申请日：1996-03-29
申请人： KURITA WATER IND LTD
发明人： FUKASE TETSURO , OTA HIROZO , HINA SEIYA , OYAMA AKIO
IPC分类号： C02F3/30
摘要： PROBLEM TO BE SOLVED: To efficiently recover phosphorus from org. waste water without performing anaerobic digestion by providing a biological phosphorization tank and concentrating the excessive sludge from this treatment tank and discharging phosphorus from conc. sludge and precipitating magnesium ammonium phosphate from a phosphorus-containing soln. SOLUTION: Phosphorus-containing water is subjected to solid-liquid separation in a first sedimentation basin 1 and separated sludge is conc. in a gravity concn. tank 4 while separated water is returned to the first sedimentation basin 1. The separated water after solid-liquid separation is subjected to biological dephosphorization treatment in a biological dephosphorization treatment tank 2 to be supplied to a solid-liquid separation means 3 to separate phosphrus-containing sludge and a part of separated sludge is returned to the biological dephosphrization tank 2 as return sludge and excessive sludge is conc. by a concn. means 5. This conc. sludge is sent to an anaerobic tank 6 and the treated liquid of the anaerobic tank 6 is sent to a solid-liquid separation means 7 to be subjected to solid-liquid separation and separated water is supplied to a dephosphorization tank 8. A magnesium salt is added to the dephosphorization tank 8 to precipitate phosphorus as magnesium ammonium phosphate useful as fertilizer.

50. 发明专利

JPH08206699A DEHYDRATING METHOD FOR ANAEROBIC DIGESTION SLUDGE 失效
公开(公告)号：JPH08206699A
公开(公告)日：1996-08-13
申请号：JP1792595
申请日：1995-02-06
申请人： KURITA WATER IND LTD
发明人： OYAMA AKIO , TAKEUCHI TADAO , OI YASUHIRO , TAKII KAZUO
IPC分类号： C02F11/00 , C02F11/04 , C02F11/14
摘要： PURPOSE: To efficiently perform dehydration by improving dehydrating property of anaerobic digestion sludge of sewage. CONSTITUTION: After aeration is performed for anaerobic digestion sludge, excess sludge is mixed therewith. Metallic salt is added to the obtained mixed sludge and then an amphoteric organic polymer flocculant is added and aggregation treatment is performed and aggregated sludge is dehydrated by a dehydrator. Anaerobic digestion sludge is aerated to degass carbonic acid gas dissolved in sludge. Thereby, when metallic salt is added in the post-process, aggregation is prevented from being hindered by generation of carbon dioxide gas from sludge. Since alkalinity of anaerobic digestion sludge is high and aggregation properties are bad, excess sludge having low alkalinity is mixed and alkalinity is lowered and aggregation properties are raised. After aggregation properties are improved by aeration and mixing of excess sludge, metallic salt is added and the neutralization of charge is performed. Then, effective aggregation and condensation are performed by adding the amphoteric organic polymer flocculant. Dehydrating properties of the obtained condensed sludge are extremely good and dehydration is performed at high filtration velocity and dehydrated cake having low water content is obtained.

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