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1. 发明专利

JPH0691281A TREATMENT OF ORGANIC WASTE WATER CONTAINING PHOSPHORUS 失效
公开(公告)号：JPH0691281A
公开(公告)日：1994-04-05
申请号：JP24186392
申请日：1992-09-10
申请人： OSAKA GAS CO LTD , KURITA WATER IND LTD
发明人： TSUKUDA YUTAKA , HARADA YOSHIAKI , YAMAZAKI KENICHI , YAMADA NOBORU , TAKADOI TADASHI , ETO YOSHIHIRO
IPC分类号： B01D19/00 , C02F1/20 , C02F1/58 , C02F1/74
摘要： PURPOSE:To treat a waste water efficiently at a low treatment cost by treating a water treated by wet type oxidation to remove carbonic acid and adding a calcium compound to the resulting waste water, regarding a treatment method which involves calcium compound addition after wet type oxidization treatment of organic waste water containing phosphorus and removal of phosphorus by making the phosphorus insoluble. CONSTITUTION:Raw water containing the substances to be oxidized and phosphorus is supplied to a wet type oxidation reaction tower 1, the substances are oxidized and decomposed, the resulting gas-liquid mixed solution is separated in a gas-liquid separating tower 2, and the gas is released to air and the separated liquid is sent to a carbonic acid removing tower 3. Carbonic acid is efficiently removed in the carbonic acid removing tower 3 and a calcium compound such as slaked lime, etc., is added to the resulting carbonic acid-removed water in a reaction tank 4 where phosphorus is made insoluble, and a part of SS is also returned from a solid-liquid separation tank 5 in a post stage. The slaked lime and carbonic acid-removed water are mixed and stirred in the reaction tank 4 and phosphorus is converted into hydroxyl apatite and thus becomes insoluble. Separation treatment is then carried out in a solid-liquid separation tank 5 and the supernatant water is discharged outside and a part of separated sludge is returned to the reaction tank 4 and the rest is discharged outside.

2. 发明专利

JPH0326400A TREATMENT OF CONCENTRATED ORGANIC WASTE LIQUID 失效
公开(公告)号：JPH0326400A
公开(公告)日：1991-02-04
申请号：JP16136889
申请日：1989-06-23
申请人： OSAKA GAS CO LTD , KURITA WATER IND LTD
发明人： YAMADA NOBORU , TAKADOI TADASHI , TOSHIMA OSAMU , HARADA YOSHIAKI , YAMADA MITSUYA
IPC分类号： C02F1/74 , C02F1/52 , C02F11/08 , C02F11/14
摘要： PURPOSE:To reduce the reaction time, to stably and efficiently treat waste liq. and to obtain high-quality treated water at a low cost by flocculating the waste liq., separating solid and liq. and subjecting the separated liq. to wet catalytic oxidation. CONSTITUTION:The waste water as a raw liq. having a high content of org. matter and obtained by crushing night soil and/or septic tank sludge, etc., is firstly added with a flocculant and directly flocculated. The flocculated water is then subjected to solid-liq. separation. The separate liq. is introduced into a wet catalytic oxidation tower 2. A pipeline 13 for supplying an oxygen-contg. gas such as air provided with a compressor C is connected to an inlet pipeline 12, the oxygen-contg. gas is blown into the raw liq. to be subjected to wet catalytic oxidation, and the liq. is introduced into the oxidation tower 2 and oxidized in the presence of catalyst. The liq. is stably treated in a short time by this method, and high-quality treated water is efficiently obtained at a low cost.

3. 发明专利

JPH04298286A METHOD FOR REMOVING DISSOLVED OXYGEN IN SERVICE WATER 失效
公开(公告)号：JPH04298286A
公开(公告)日：1992-10-22
申请号：JP6313991
申请日：1991-03-27
申请人： OSAKA GAS CO LTD , KURITA WATER IND LTD
发明人： HARADA YOSHIAKI , YAMAZAKI KENICHI , YAMADA NOBORU , TAYA SHIRO , ETO YOSHIHIRO , TAKADOI TADASHI
IPC分类号： B01D19/04 , B01J23/30 , B01J23/40 , B01J23/52 , B01J23/72 , B01J23/74 , B01J27/04 , B01J27/10 , C02F1/58
摘要： PURPOSE:To effectively remove DO in service water. CONSTITUTION:A hydrogen donor is added to the service water contg. the DO and a deoxygenation reaction is effected in the presence of a carrier catalyst at 100 to 250 deg.C and under a pressure at which a liquid phase is maintained. The effective components of the carrier catalyst are Fe, Co, Ni, Ru, Rh, Pd, Ir, Pt, Cu, Au, and W as well as the water-soluble or hardly water-soluble compds. of these metals.

4. 发明专利

JPH03296488A TREATMENT OF HIGH CONCENTRATION ORGANIC WASTE WATER 失效
公开(公告)号：JPH03296488A
公开(公告)日：1991-12-27
申请号：JP9992790
申请日：1990-04-16
申请人： OSAKA GAS CO LTD , KURITA WATER IND LTD
发明人： HARADA YOSHIAKI , YAMAZAKI KENICHI , YAMADA NOBORU , TAKADOI TADASHI
IPC分类号： C02F1/74 , C02F5/00 , C02F5/08 , C02F5/10
摘要： PURPOSE:To reduce the washing frequency in a system, to shorten an operation stop time and to enhance the rate of operation by adding a predetermined amount of an acrylic acid type low MW polymer to high concn. org. waste water to subject the waste water to wet calalytic oxidation. CONSTITUTION:High concn. org. waste water such as excretion or the sludge of a purifying tank is supplied to a grinding process 1 from piping 11 to be finely ground and sent to a heat exchanger 2 from piping 12 to be heated by the heat exchange with the treated water of a wet catalytic oxidation tower 4. Subsequently, the waste water is introduced into a wet solubilizing tower 3 through piping 13 and subsequently introduced into the wet catalytic oxidation tower 4 through piping 14. The wet catalytic oxidation tower 4 is constituted by packing a high pressure container with an oxidizing catalyst to form a catalyst bed and the waste water is passed through the catalyst bed as an ascending current to be subjected to oxidation treatment under a high humidity and high pressure condition. A necessary amount of an acrylic acid type low MW polymer is added to the waste water as a scale inhibitor from the piping 17 on the inlet side of a water supply pump P.

5. 发明专利

JPH02265696A TREATMENT OF WASTE WATER 失效
公开(公告)号：JPH02265696A
公开(公告)日：1990-10-30
申请号：JP8735989
申请日：1989-04-06
申请人： OSAKA GAS CO LTD , KURITA WATER IND LTD
发明人： YAMADA NOBORU , SANO HAYAO , TAKADOI TADASHI , HARADA YOSHIAKI , YAMADA MITSUYA
IPC分类号： C02F3/34 , C02F1/74
摘要： PURPOSE:To facilitate the control of a feed air amount necessary for decomposing the COD component and total nitrogen (T-N) in raw waste water by subjecting org. waste water containing a nitrogen compound to wet oxidation treatment using an oxidizing catalyst under a high temp. and high pressure condition and biologically denitrifying the formed nitrate ion. CONSTITUTION:Org. waste water containing a nitrogen compound is passed through a wet oxidizing tower 4 held to a high temp. and high pressure condition. In the wet oxidizing tower 4, a catalyst is laminated as a catalyst bed 5. The treated water is neutralized to pH7 to be passed through a denitrifying tank 6 containing denitrigying bacteria and a re-aeration tank 7 due to air. By this method, air is sent into the system in a slightly excessive amount without strictly controlling an air amount necessary for wet oxidation treatment and nitrogen of an -NO3 and -NO2 type in the treated water is biologically denitrified and total nitrogen can be sufficiently lowered.

6. 发明专利

JPH02164492A DEPHOSPHORIZATION OF WASTE WATER 失效
公开(公告)号：JPH02164492A
公开(公告)日：1990-06-25
申请号：JP31976688
申请日：1988-12-19
申请人： OSAKA GAS CO LTD , KURITA WATER IND LTD
发明人： YAMADA NOBORU , TAKADOI TADASHI , HARADA YOSHIAKI
IPC分类号： C02F1/44 , C02F1/58
摘要： PURPOSE:To dephosphorize waste water with high efficiency by returning the phosphorus insolubilized matter-containing slurry formed in the system to waste water to enhance the concn. of phosphorus in waste water and forming well separable crystals. CONSTITUTION:A phosphorus insolubilized matter-containing slurry is returned and supplied to a dissolving tank 11 through a line 8 and mixed with raw waste water containing phosphorus to dissolve phosphorus. The waste water enhanced in the concn. of soluble phosphorus in the dissolving tank is mixed with the aqueous slaked lime solution supplied from a line 6 in a slurry crystallizing reaction tank 2 to form the phosphorus insolubilized matter-containing slurry having good filterability and separability and the obtained slurry is sent to a recirculation tank 3. The phosphorus insolubilized matter-containing slurry issued from the recirculation tank 3 is sent to a membrane separator 4 to pass through a large number of tubular filters. Herein, water passes through the walls of the tubular filters composed of a filter material to be discharged and the greater part of the phosphorus insolubilized matter-containing slurry is enhanced in the concn. of phosphorus to be returned to the recirculation tank 3 and a part of said slurry is returned to the dissolving tank 1. Treated water is sent to a pH control tower through a line 10 to be neutralized by carbon dioxide in waste gas.

7. 发明专利

JPH03296500A TREATMENT OF HIGH CONCENTRATION ORGANIC WASTE WATER 失效
公开(公告)号：JPH03296500A
公开(公告)日：1991-12-27
申请号：JP9992590
申请日：1990-04-16
申请人： OSAKA GAS CO LTD , KURITA WATER IND LTD
发明人： HARADA YOSHIAKI , MATSUI SUSUMU , TAKADOI TADASHI , YAMADA NOBORU , KIJIMA JIRO
IPC分类号： C02F3/06 , C02F1/74 , C02F3/34 , C02F9/00
摘要： PURPOSE:To stably treat high concn. org. matter in low cost by treating a nitrate ion formed by the wet catalytic oxidation of high concn. org. waste water in a fixed bed type biological denitrification tower and removing a residual COD component by biological filtration. CONSTITUTION:The high concn. org. waste water subjected to fine grinding treatment in a grinding process 1 is supplied to a heat exchanger 2 through piping 12 and subsequently supplied to a wet catalytic oxidation tower 14 through piping 13, a solubilizing tower 3 and piping 14. The waste water is subjected to oxidation treatment in the presence of a catalyst in the wet catalytic oxidation tower 4 and the treated water and treated gas from the tower 4 are taken out from piping 15 to be cooled to about room temp. by the heat exchanger 2 and supplied to a solid-liquid separation tank 5 and the separated liquid herein is introduced into a fixed bed type biological denitrification tower 6 packed with a filter material to be subjected to denitrification treatment. The treated liquid in the biological denitrification tower 6 is transferred to a biological filter tower 7 from piping 18 and subjected to biological filtration to decompose and remove residual low MW org. acids.

8. 发明专利

JPH03296487A TREATMENT OF HIGH CONCENTRATION ORGANIC WASTE WATER 失效
公开(公告)号：JPH03296487A
公开(公告)日：1991-12-27
申请号：JP9992690
申请日：1990-04-16
申请人： OSAKA GAS CO LTD , KURITA WATER IND LTD
发明人： HARADA YOSHIAKI , YAMADA SUEKAZU , FUJIYA HIROSHI , TAKADOI TADASHI , MATSUI KENSUKE , SHIIBASHI TOSHIO
IPC分类号： C02F3/06 , C02F1/74 , C02F9/00
摘要： PURPOSE:To stably treat waste water in a low cost by oxidizing high concn. org. waste water in a wet catalytic oxidizing tower and filtering the liquid subjected to oxidative treatment in a filter tower using the exhaust gas from the wet catalytic oxidation tower as washing gas. CONSTITUTION:A biological filtered raw solution is introduced into a biological filter tower from an inflow pipe 19 to be passed through a granular medium bed kept aerobic along with the air from an air diffusion pipe as an ascending current. At this time, the biological filtered raw solution is subjected to not only aerobic microbiological treatment by the bacteria membranes bonded to the surfaces of granular media but also filtering action and the obtained treated water of high quality is taken out of a discharge pipe 20. Further, a biological denitrification tower 8 or the biological filter tower 9 are periodically washed but, as the washing gas thereof, the exhaust gas discharged from a wet catalyst oxidation tower 4 and separated in a gas-liquid separation tank 6 is utilized.

9. 发明专利

JPH0326399A TREATMENT OF CONCENTRATED ORGANIC WASTE LIQUID 失效
公开(公告)号：JPH0326399A
公开(公告)日：1991-02-04
申请号：JP16136789
申请日：1989-06-23
申请人： OSAKA GAS CO LTD , KURITA WATER IND LTD
发明人： YAMADA NOBORU , TAKADOI TADASHI , HARADA YOSHIAKI , YAMADA MITSUYA
IPC分类号： C02F9/00 , C02F1/74 , C02F11/08
摘要： PURPOSE:To stably and efficiently treat waste liq. and to obtain high-quality treated water at a low cost by subjecting waste liq. to wet catalytic oxidation and then removing the remaining COD component by biological filtration. CONSTITUTION:A pipeline 13 for supplying an oxygen-contg. gas such as air provided with a compressor C is connected to a pipeline 12 for introducing raw liq. into a wet catalytic oxidation tower 2. An oxygen-contg. gas such as air is blown into the raw liq., and the raw liq. is introduced into the oxidation tower 2 and oxidized in the presence of catalyst. The liq. treated in the oxidation tower 2 is neutralized in a neutralization tank 15, and the remaining low-molecular-weight org. acids, etc., are removed in a filtration tower 3. By this method, a concd. org. matter-contg. waste liq. such as night soil is stably treated with no need for advanced treatment, and high-quality treated water is efficiently obtained at a low cost.

10. 发明专利

JPH02265695A TREATMENT OF WASTE WATER 失效
公开(公告)号：JPH02265695A
公开(公告)日：1990-10-30
申请号：JP8735889
申请日：1989-04-06
申请人： OSAKA GAS CO LTD , KURITA WATER IND LTD
发明人： YAMADA NOBORU , SANO HAYAO , TAKADOI TADASHI , HARADA YOSHIAKI , YAMAZAKI KENICHI , YAMADA SUEKAZU
IPC分类号： C02F1/74
摘要： PURPOSE:To facilitate the control of an air amount necessary for decomposing a COD component and total nitrogen (T-N) by adding an inorg. acid and/or a compound forming acid by oxidation to waste water containing org. matter and a nitrogen compound to perform the wet catalytic oxidation of waste water at specific pH. CONSTITUTION:An inorg. acid and/or a compound forming an acid by oxidation are added to waste water so as to control the pH thereof to 8 or less. By this control, even when the amount of the air sent into a wet oxidation treatment apparatus is made excessive, a nitrogen compound is decomposed to N2-gas without being oxidized to NO3. By this method, even when air is sent in the wet oxidation apparatus slightly excessively without strictly controlling the air amount necessary for wet oxidation treatment, nitrogen of an -NO2 type and -NO3 type in water to be treated can be sufficiently lowered.

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