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1. 发明专利

JPH08155491A BIOLOGICAL DENITRIFICATION APPARATUS 失效
公开(公告)号：JPH08155491A
公开(公告)日：1996-06-18
申请号：JP30073594
申请日：1994-12-05
申请人： KURITA WATER IND LTD
发明人： MITA MASAICHIRO , NISHIKAWA SHOZO , KAGIWADA MASAKO , FUKASE TETSURO
IPC分类号： C02F3/34
摘要： PURPOSE: To prevent sludge in a denitrification tank from floating and to enable stable and efficient denitrification by removing sludge which floated from the denitrification tank in which dirty water is passed through a sludge bed added with elemental sulfur in a upward current, adding a surface active agent to the sludge in a reaction vessel, mixing them, and returning liquid in the reaction vessel to the denitrification tank. CONSTITUTION: In a denitrification apparatus, raw water is introduced from a raw water inflow pipe 2 to the bottom part of a denitrification tank 1 in which a fluidized bed 1A added with elementary sulfur as an electron donor is formed to be denitrified in an upward current. The treated water is removed from the upper part of the tank through a treated water take off pipe 3. In this process, an extraction pipe 4 for floating sludge is placed near the upper part of the fluidized bed 1A, sludge extracted from the pipe 4, after being added with a surfactant in a surfactant storage tank 6 by a pipe 5, is modified in a reaction vessel 7, and the modified sludge is refluxed to the bottom part of the denitrification tank 1 through a pipe 8. In this way, the sludge is prevented from floating and flowing out so that the amount of sludge held in the denitrification tank 1 is kept high.

2. 发明专利

JPH07301618A ACTIVE OXYGEN DETECTING METHOD 失效
公开(公告)号：JPH07301618A
公开(公告)日：1995-11-14
申请号：JP9338894
申请日：1994-05-02
申请人： KURITA WATER IND LTD
发明人： NISHIKAWA SHOZO
IPC分类号： G01N27/416
摘要： PURPOSE:To easily and quickly detect presence of active oxygen generation without using an expensive device or reagent by soaking a copper electrode and reference electrode in water containing oxidation-reduction pigment, and after mixing of a testing object, measuring a potential difference between both the electrodes. CONSTITUTION:A copper electrode 1 and reference electrode 2 are soaked in test water, a potentiometer is connected between both the electrodes, and then a testing object, namely a sample which is tested whether or not it generates active oxygen in the case of being added to the water is added and mixed to measure a potential difference. In this case, a copper plate and copper wire can be used as the copper electrode 1 while an Ag-AgCl electrode or the like can be used as the reference electrode 2. As a quantity of testing object to be added and mixed into the test water, about 0.2-2g for 100ml of the test water is appropriate. In the case of the testing object which generates the active oxygen when being added and mixed into the test water, increase of potential difference is immediately recognized. On the other hand, in the case of the testing object which rarely generates the active oxygen, the increase of potential difference is not recognized.

3. 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.

4. 发明专利

JPH08100250A SURFACE TREATMENT OF COPPER MEMBER 失效
公开(公告)号：JPH08100250A
公开(公告)日：1996-04-16
申请号：JP23703494
申请日：1994-09-30
申请人： KURITA WATER IND LTD
发明人： HIRANO SHOEI , NISHIKAWA SHOZO
IPC分类号： C23C8/12
摘要： PURPOSE: To suppress the rise of natural potential and to prevent pitting corrosion by forming an oxidized coating film on a copper member by oxidation under heating in an oxygen-contg. atmosphere. CONSTITUTION: A copper member such as a copper tube is heated in an oxygen- contg. atmosphere such as air to form a corrosion resistant oxidized coating film of about 10-500nm thickness on the surface of the copper member. Since this oxidized coating film formed by surface treatment acts as a barrier to electronic conduction, even when an active oxygen producing field is formed, a cathode reaction is not accelerated, the rise of natural potential does not occur and pitting corrosion is prevented.

5. 发明专利

JPH06201637A METHOD FOR MONITORING CORROSION 失效
公开(公告)号：JPH06201637A
公开(公告)日：1994-07-22
申请号：JP34804192
申请日：1992-12-28
申请人： KURITA WATER IND LTD
发明人： NISHIKAWA SHOZO
IPC分类号： C23F11/08 , G01N17/00 , G01N27/26 , G01N33/20
摘要： PURPOSE:To easily and effectively monitor by a measurement in a short time by corroding a metal member in contact with water system without necessity of a special device and without special devising of a testpiece shape, etc. CONSTITUTION:A testpiece of the same material as a metal member in contact with a water system is dipped in the water system, then pulled up, then dipped in phosphate-containing water, and a potential of the testpiece is measured after a predetermined time is elapsed. Accordingly, a corrosion potential raised by acceleration of cathode reaction due to adherence of microorganism, scale component of the system is measured as a value amplified by an anode reaction suppressing action in the phosphate-containing water. Thus, an increase in the corrosive potential can be stably and effectively detected with high sensitivity.

6. 发明专利

JPH1110194A WASTEWATER TREATMENT DEVICE 失效
公开(公告)号：JPH1110194A
公开(公告)日：1999-01-19
申请号：JP16588897
申请日：1997-06-23
申请人： KURITA WATER IND LTD
发明人： MATSUI KENSUKE , NISHIKAWA SHOZO , SHIBATA TAKESHI
IPC分类号： C02F3/30 , C02F3/34
摘要： PROBLEM TO BE SOLVED: To recover a part of wastewater as magnesium ammonium phosphate by providing an anaerobic treatment tank, a reaction tank into which treated liquid of the anaerobic treatment tank is introduced, and a denitrification tank into which treated liquid of the reaction tank is introduced or an aerobic treatment tank. SOLUTION: Wastewater is introduced into an anaerobic tank 1 together with a return sludge from a settling tank 3 of a succeeding stage, where phosphorus in the return sludge is discharged on the side of liquid under anaerobic conditions. The treated anaerobic liquid is then introduced into a magnesium ammonium phosphate(MAP) reaction tank 6, where the phosphorus is caused to react with ammonia and Mg compounds to produce MAP. The MAP reaction liquid, from which phosphorus and ammonia have been removed by the production of the MAP, is then fed into an aerobic tank 2, where BOD is removed under conditions of aeration. And the aerobic treated liquid is introduced into the settling tank 3 so as to be separated to solids and liquid and the separated liquid is discharged to the outside as treated water. On the other hand, separated sludge which takes in phosphorus in the form of orthophosphoric acid by a biological treatment is returned to the tank 1 as return sludge.

7. 发明专利

JPH0938689A TREATMENT OF SELENIUM CONTAINING WATER 失效
公开(公告)号：JPH0938689A
公开(公告)日：1997-02-10
申请号：JP18926295
申请日：1995-07-25
申请人： KURITA WATER IND LTD
发明人： FUKASE TETSURO , NISHIKAWA SHOZO
IPC分类号： C02F3/28
摘要： PROBLEM TO BE SOLVED: To provide a method of preventing degradation of activity of biological sludge caused by an Se compound insolubilized at an anaerobic treatment, maintaining the activity of biological sluge high and capable of stably and efficiently removing Se and organic materials as the result. SOLUTION: Raw water 5, returned sludge 6, organic materials 8 and an oxygen source 9 are charged into an anaerobic treating tank 1 to be mixed with the biological sludge, an anaerobic treatment is performed and Se compound is reduced and the insolubilized Se compound is adsorbed on the biological sludge to be removed. At this time, the supply of organic materials is controlled so that the content of Se in the biological sludge is

8. 发明专利

JP2004209479A Method and apparatus for anaerobic treatment 有权
标题翻译：用于厌氧处理的方法和装置
公开(公告)号：JP2004209479A
公开(公告)日：2004-07-29
申请号：JP2004114629
申请日：2004-04-08
申请人： Kurita Water Ind Ltd , 栗田工業株式会社
发明人： YODA MOTOYUKI , FUKASE TETSURO , NISHIKAWA SHOZO
IPC分类号： C02F3/28 , C02F11/00 , C02F11/04 , C02F11/06
CPC分类号： Y02E50/343
摘要： PROBLEM TO BE SOLVED: To provide a method and an apparatus for anaerobic treatment of an organic waste liquid which can reduce the volume of sludge generated in the anaerobic treatment, prevent a deterioration in treated water quality, such as increases in chromaticity and COD, and obtain a high treated water quality at a low cost. SOLUTION: Liquid 11 in an anaerobic treatment tank 1 is drawn from the tank, and then subjected to solid-liquid separation in a membrane separator 2 to obtain a treated liquid. A part 5 of concentrated sludge is returned to the anaerobic treatment tank 1, and another part 17 of the sludge is introduced into a modifying tank 3, such as an ozone treatment tank or a high-pressure pulse discharge treatment tank, to modify the sludge to easily biodegradable one, and then returned to the anaerobic treatment tank 1, thereby reducing the volume of generated sludge. COPYRIGHT: (C)2004,JPO&NCIPI
摘要翻译：待解决的问题：提供一种有机废液的厌氧处理方法和装置，其可以减少厌氧处理中产生的污泥的体积，防止处理水质的劣化，例如色度的增加和 COD，并以低成本获得高处理水质。解决方案：将厌氧处理槽1中的液体11从罐中抽出，然后在膜分离器2中进行固液分离，得到处理液。将浓缩污泥的第5部分返回到厌氧处理槽1，将污泥的另一部分17引入诸如臭氧处理槽或高压脉冲放电处理槽的改性槽3中，以将污泥易于生物降解，然后返回厌氧处理槽1，从而减少产生污泥的体积。版权所有（C）2004，JPO＆NCIPI

9. 发明专利

JPH1128496A TREATMENT OF NIGHT SOIL OR THE LIKE 失效
公开(公告)号：JPH1128496A
公开(公告)日：1999-02-02
申请号：JP18502797
申请日：1997-07-10
申请人： KURITA WATER IND LTD
发明人： MATSUI KENSUKE , SHIBATA TAKESHI , NISHIKAWA SHOZO
IPC分类号： C02F3/08 , C02F1/52 , C02F1/56 , C02F3/28 , C02F11/04 , C02F11/14
摘要： PROBLEM TO BE SOLVED: To increase the thermal efficiency and decomposition efficiency of an anaerobic digestion and to improve the quality of concentration separated water and digestion elimination water by adding an inorganic fluocculant into night soil and/or organic sludge, then adding an amphoteric high molecular fluocculant, stirring them to granulate and concentrate and anaerobically digesting the concentrated material. SOLUTION: Night soil, septic tank sludge and surplus sludge are introduced into a fluocculation reaction tank, flocculated by at first adding an inorganic flocculant, stirring and then, adding an amophoteric polymer and, stirring and further, granulated by slowly stirring. The granulated sludge easily separates the water with a simply structured screen to concentrate the water and to digest anaerobically the water in an anaerabic digestion process 2. A digestion supernatant is introduced into an activated sludge process 3 together with the concentration separated water from the screen 5 to be treated with the activated sludge. Since the concentration separated water and the digestion supernatant have an excellent water quality and are particularly low in a COD, chromaticity and the concentration of phosphorus or the like, which are difficult to remove by an activated sludge process, the excellent treated water is obtained by the activated sludge treatment.

10. 发明专利

JPH0975064A SHORT PIPE TYPE APPARATUS FOR MEASURING GROWTH EXTENT OF SLIME 失效
公开(公告)号：JPH0975064A
公开(公告)日：1997-03-25
申请号：JP23544095
申请日：1995-09-13
申请人： KURITA WATER IND LTD
发明人： TASHIRO HIROHISA , NUMAKURA TAKAO , NISHIKAWA SHOZO
IPC分类号： G01N33/00 , C02F1/00 , C12M1/34
摘要： PROBLEM TO BE SOLVED: To provide a short pipe type apparatus for measuring the growth extent of slime capable of stably and continuously measuring the growth extent of slime for a long period. SOLUTION: This short pipe type apparatus for measuring the growth extent of slime is obtained by installing a mechanism 2 for removing particles for introducing water from a water system to be measured thereinto with a pump P1 and a pipe 1, providing the mechanism 2 for removing the particles with a tilted type screen (2a) and a mechanism (2b) for removing sedimenting particles. The apparatus is capable of feeding water from the mechanism 2 for removing the particles through a metering measure 3 into a tank 4, passing the water from the tank 4 through a flowmeter 5 into a mechanism 4 for removing underwater bubbles with a pump P2 and then passing the water through a series 7 of short pipes which is formed by connecting plural short pipes 8 in series. The water passing through the short pipe series 7 is returned to the tank 4 and an excessive amount of water is discharged from an overflowing part (4a).

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