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1. 发明专利

JPH09294993A WASTE WATER TREATMENT APPARATUS EQUIPPED WITH CARRIER OUTFLOW-PREVENTING DEVICE 失效
公开(公告)号：JPH09294993A
公开(公告)日：1997-11-18
申请号：JP11273696
申请日：1996-05-07
申请人： HITACHI PLANT ENG & CONSTR CO , FUNAKOSHI TAIJI , TAKAHASHI AKIHIRO
发明人： KOJIMA MASAYUKI , MORI NAOMICHI , FUNAKOSHI TAIJI , TAKAHASHI AKIHIRO , KASAI MASATAKA
IPC分类号： C02F3/08
摘要： PROBLEM TO BE SOLVED: To prevent a carrier from flowing out of a treatment tank without using a screen. SOLUTION: A water area 42 into which the air 26 from an aeration device 16 is not introduced is formed above the inflow passage 40 from an aeration treatment zone 32 to a carrier removing zone 34 and a descending stream area is formed to the water area 42 when the ascending stream generated in a treatment tank 14 by air lift action is reversed at the surface of water to fall. As a result, the treated water in the aeration treatment zone 32 flows in the carrier separating zone 34. Since the relation between an inflow amt, a discharge amt. and the specific gravity of a carrier is set so that the discharge amt. from a trough 22 becomes smaller than the inflow amt. of treated water into the carrier separating zone 34 and the rising speed of treated water in the carrier separating zone becomes lower than the sedimentation speed of the carrier, a part of treated water flowing in the carrier separating zone 34 rises through the carrier separating zone 34 to be discharged from the discharge part of the trough 22 and the reaminder thereof is returned to the aeration treatment zone 32 from a return port along with the carrier sedimented in the carrier separating zone 34.

2. 发明专利

JPH0810793A NITRIFICATION AND DENITRIFICATION EQUIPMENT 失效
公开(公告)号：JPH0810793A
公开(公告)日：1996-01-16
申请号：JP15227294
申请日：1994-07-04
申请人： HITACHI PLANT ENG & CONSTR CO , FUNAKOSHI TAIJI
发明人： FUNAKOSHI TAIJI , KOJIMA MASAYUKI , KAWAJIRI HITOSHI , KITAZAWA TERUHIRO
IPC分类号： C02F3/12 , C02F3/20 , C02F3/30 , C02F3/34
摘要： PURPOSE:To efficiently execute nitrification and denitrification treatments by respectively forming denitrification vessels which are partitioned to two vessels, upper and lower, by partition walls and have raw water inflow ports in the lower story and nitrification vessels which have outflow water paths for treated water in the upper story and circulate liquids in order of the outflow water paths, pipings and the inflow water paths between the nitrification vessels and the denitrification vessels. CONSTITUTION:The nitrification and denitrification equipments 14 of a biological reaction plate 10 adjacently provided with an aeration tank 12 and plural sets of the nitrification and denitrification equipment 14 are composed by segmenting the main bodies to the nitrification vessels 28 and the denitrification vessels 20 by the partition walls 26. The outflow water paths 38 disposed in the nitrification vessels 28 and the inside of the denitrification vessels 20 are communicated by communicating pipes 52. The inside of the denitrification vessels 20 and the inflow water paths 54 disposed in the nitrification vessels 28 are communicated by communicating pipes 55. The liquid is circulated between both vessels 28 and 20 by the air lift effect from air diffusers 3 of the nitrification vessels 28. As a result, the air 66 from the air diffusers 33 or the liquid of the nitrification vessels 28 having the high concn. of dissolved oxygen are prevented from short passing into the denitrification vessels 20, by which the increase of dissolved oxygen in the denitrification vessels 20 is prevented.

3. 发明专利

JPH09192416A LIQUID DISTRIBUTOR AND SOLID-LIQUID SEPARATOR PROVIDED WITH THE SAME 失效
公开(公告)号：JPH09192416A
公开(公告)日：1997-07-29
申请号：JP909196
申请日：1996-01-23
申请人： HITACHI PLANT ENG & CONSTR CO , FUNAKOSHI TAIJI
发明人： KAWAJIRI HITOSHI , KOJIMA MASAYUKI , YAMAMOTO HIROBUMI
IPC分类号： B01D24/00 , B01D29/90 , B01D36/00 , B04C3/04
摘要： PROBLEM TO BE SOLVED: To equalize filtration velocity of a solid-liquid separator as much as possible over the whole filter medium bed area. SOLUTION: Feed water to be treated is caused to flow into a cylindrical vessel 40 from an inflow pipe 42 arranged in the tangential direction thereof near the lower end thereof to generate a turning flow in the cylindrical vessel 40, and the turning flow is caused to flow out from plural discharge pipes 44 installed in the tangential direction of the peripheral surface of the cylindrical vessel 40 at the same height position thereof to constitute a distributor 3. Therefore, liquid flowing into the cylindrical vessel 40 is equally distributed and caused to flow out. The distributors 32 are applied to a solid-liquid separator, allowing the flow velocity distribution of feed water to be treated in the whole floating filter medium bed area to be equalized compared to the conventional distributors.

4. 发明专利

JPH07290090A NITRATING AND DENITRIFYING DEVICE 失效
公开(公告)号：JPH07290090A
公开(公告)日：1995-11-07
申请号：JP8347494
申请日：1994-04-21
申请人： HITACHI PLANT ENG & CONSTR CO , FUNAKOSHI TAIJI
发明人： FUNAKOSHI TAIJI , KOJIMA MASAYUKI , KAWAJIRI HITOSHI , KITAZAWA TERUHIRO
IPC分类号： C02F3/30 , C02F3/34
摘要： PURPOSE:To provide a nitrating and denitrifying device with the treating performance improved by returning a nitrated liq. in a nitration tank uniformly to a denitrification tank. CONSTITUTION:A weir 50 for separating a nitration tank 26 and a circulating water passage 46 along a separation screen 48 is provided in the passage 46 for circulating a liq. nitrated in the tank 26 by a carrier 28 entrapping and immobilizing activated sludge and nitrating bacteria to a denitrification tank by air lift for aerating to make the inside of the denitrification tank aerobic, and the liq. nitrated in the tank 26 is allowed to flow into the circulating water passage from the weir by air lift. The water level of the nitration tank is made independent of the water level of the passage 46, namely that of the denitrification tank, by the weir 50, and hence the nitrated liq. in the tank 26 with the water level raised by air lift is passed through the screen 48, allowed to overflow the weir 50 and flows down into the passage 46.

5. 发明专利

JPH07185214A WASTE WATER TREATMENT METHOD 失效
公开(公告)号：JPH07185214A
公开(公告)日：1995-07-25
申请号：JP33134593
申请日：1993-12-27
申请人： HITACHI PLANT ENG & CONSTR CO , FUNAKOSHI TAIJI
发明人： TOMIZAWA CHISATO , OGATA KOJI , FUNAKOSHI TAIJI , TANAKA AKIO , YAGI YASUYUKI , SATO HITOSHI , YAMAMOTO HIROBUMI , KAWAJIRI HITOSHI , KOJIMA MASAYUKI
IPC分类号： B01D21/01 , B03C1/00 , C02F1/48 , C02F1/52
摘要： PURPOSE:To provide a waste water treatment method in which magnetic powder, which is used in a magnetic treatment method for waste water, can be recovered in high purity and at a high yield. CONSTITUTION:Before magnetic powder 71 being recovered by a magnetic separation apparatus after a magnetic coagulated flock being dispersed by alkali treatment in an alkali treatment tank 26 in a process in which slurry of the magnetic coagulated flock obtained by the solid-liquid separation of the magnetic coagulated flock, which is formed by adding magnetic powder 71 and a coagulant into waste water in a treatment tank 12, in a separation tank 14, fibers 27, which float in the alkali treatment tank 26, are separated in advance from the slurry. Since the slurry of the magnetic coagulated flock, which is separated together with the fibers 27, contains the magnetic powder 71, the powder 71 is recovered from wash water used for washing the fibers 27 in a fiber separation apparatus 36. In this way, the magnetic powder 71 can be recovered in high purity and at a high yield.

6. 发明专利

JPH07124410A SOLID-LIQUID SEPARATOR 失效
公开(公告)号：JPH07124410A
公开(公告)日：1995-05-16
申请号：JP15359093
申请日：1993-06-24
申请人： HITACHI PLANT ENG & CONSTR CO , FUNAKOSHI TAIJI
发明人： FUNAKOSHI TAIJI , OGATA KOJI , KOJIMA MASAYUKI , KAWAJIRI HITOSHI , YAMAMOTO HIROBUMI
IPC分类号： B01D24/02 , B01D24/46 , B01D24/48 , B01D29/60
摘要： PURPOSE:To provide a compact solid-liquid separator with which the regeneration of the filter medium can easily be performed and the amount of the waste washing water can be reduced by supplying the raw water to be treated from the storage tank to the filtration chamber in an upward stream, thereafter filtering the raw water with the filter medium layer and at the same time passing the water through the integrated filtration chamber and settling chamber. CONSTITUTION:In this separator, the treating tank 12 is divided with the division plate 14 into integrally structured upper and lower chambers. The upper chamber is the filtration chamber 20 of the raw water to be treated 16 having the filter medium layer 18 and the lower chamber is the settling chamber 26 of the waste washing water 22 of the filter medium 19. The raw water storage chamber 30 is communicated with the filtration chamber 20 and further the lower end of the flock forming pipe 42 is communicated with the settling chamber 26. The liquid level 38 of the raw water storage chamber 30 is set at a level higher than the level 40 of the filtration chamber 20 and the liquid level of the flock forming pipe 42 is set at a level lower than the liquid level 38 of the raw water storage chamber 30. Further the raw water intake pipe 44 is provided with the motor driven telescopic valve 46 and the waste washing water pipe 58 is provided with the valve 56. The plural air nozzles 74 are provided below the filter medium layer 18 and when the filtration capacity of the filter medium 19 is lost, air is jetted from the air nozzles 74 toward the filtration layer 18 to wash it and the waste washing water 22 is transferred to the settling chamber 26.

7. 发明专利

JPH078982A REVOLVING FLOW AERATION APPARATUS 失效
公开(公告)号：JPH078982A
公开(公告)日：1995-01-13
申请号：JP15240193
申请日：1993-06-23
申请人： HITACHI PLANT ENG & CONSTR CO , FUNAKOSHI TAIJI
发明人： FUNAKOSHI TAIJI , OGATA KOJI , KITAZAWA TERUHIRO , KOJIMA MASAYUKI
IPC分类号： C02F3/08 , C02F3/12
摘要： PURPOSE:To make activated sludge and nitrifying bacteria holding carriers hard to sediment and to easily disperse them in water to be treated even if they are sedimented. CONSTITUTION:Compressed air is discharged the water to be treated containing bacteria and bacteria holding carriers stored in an aeration tank 30 from an air diffusion pipe 24 to generate revolving streams between left and right chambers 34, 36 whose upper and lower parts communicate with each other through a partition plate 38. The bottom part of the aeration tank 30 is formed into a circular arc shape in the flow direction of the revolving streams. Since the flow resistance of the bottom part of the aeration tank 30 is reduced, the revolving stream speed in the bottom part of the aeration tank 30 is not decelerated and activated sludge or nitrifying bacteria holding carriers becomes hard to sediment. A water channel forming plate is arranged between the bottom part of the aeration tank 30 and the partition plate 38 to form divided water channels and the flow rate of the water channel can be arbitrarily adjusted by a flow rate control damper. Activated sludge and nitrifying bacteria holding carriers can easily be dispersed even if they are sedimented.

8. 发明专利

JPH0947784A NITRATING AND DENITRIFYING DEVICE 失效
公开(公告)号：JPH0947784A
公开(公告)日：1997-02-18
申请号：JP20616995
申请日：1995-08-11
申请人： HITACHI PLANT ENG & CONSTR CO , FUNAKOSHI TAIJI
发明人： FUNAKOSHI TAIJI , KOJIMA MASAYUKI , KAWAJIRI HITOSHI , MATSUDA NORIO
IPC分类号： C02F3/34
摘要： PROBLEM TO BE SOLVED: To efficiently denitrify the water to be treated having oxygen consumed by confining a region where a denitrification reaction hardly takes place without using a wall, etc., and efficiently consuming oxygen in the water returned from a nitration tank. SOLUTION: The device is vertically divided by a partition wall 12 into a lower denitrification tank 14 and an upper nitration tank 16. A part of the water treated in the nitration tank 16 is discharged into the denitrification tank 14 from the outlet 28 of a return pipe 26 and immediately mixed with the raw water 24 supplied from an inlet 20 The oxygen dissolved in the water is consumed by the component related to BOD in the raw water in a region A of the denitrification tank 14. Since an underwater agitator 30 is set furthest from the region, the flow rate of the water is minimized in the denitrification tank 14, hence the region where the denitrification reaction hardly takes place is confined without using a wall, etc., and oxygen is efficiently consumed.

9. 发明专利

JPH07290085A TREATMENT OF WASTE WATER AND DEVICE THEREFOR 失效
公开(公告)号：JPH07290085A
公开(公告)日：1995-11-07
申请号：JP8347394
申请日：1994-04-21
申请人： HITACHI PLANT ENG & CONSTR CO , FUNAKOSHI TAIJI
发明人： FUNAKOSHI TAIJI , KOJIMA MASAYUKI , KAWAJIRI HITOSHI , YAMAMOTO HIROBUMI , NOTO KAZUHIKO , MORI NAOMICHI
IPC分类号： C02F3/06 , C02F3/10 , C02F3/30
摘要： PURPOSE:To improve the quality of treated water in accordance with the inflow of waste water such as sewage, reduce the power cost for the aeration in treating activated sludge and the output of sludge and make the device compact. CONSTITUTION:A high-speed filter 10 and a biological treating device 12 are organically combined. When the inflow of the waste water is less than the allowable capacity of the biological treating device 12, the waste water is filtered by the high-speed filter 10 at the rate of

10. 发明专利

JPH07289812A DEVICE FOR SEPARATING SOLID FROM LIQUID 失效
公开(公告)号：JPH07289812A
公开(公告)日：1995-11-07
申请号：JP8347294
申请日：1994-04-21
申请人： HITACHI PLANT ENG & CONSTR CO , FUNAKOSHI TAIJI
发明人： FUNAKOSHI TAIJI , KOJIMA MASAYUKI , KAWAJIRI HITOSHI , YAMAMOTO HIROBUMI
IPC分类号： B01D24/02 , B01D24/00 , B01D24/46 , B01D29/62
摘要： PURPOSE:To effectively wash and peel the solid-components sticking to filter media by providing a treating vessel with partition walls in a vertical direction within this vessel in such a manner that the layer width attains a prescribed ratio to the layer height of a floating filter medium layer and providing the vessel with an air ejecting means below the floating filter medium layer so that swirling flow is generated by the air ejecting means within the respective areas of the treating vessel partitioned by these partition walls. CONSTITUTION:The solid-components in raw water which is to be treated and is admitted in upward current into the treating vessel 12 are filtered and separated by the floating filter medium layer 22 which is arranged in the treating vessel 12 and is formed of the many filter media consisting of meshed moldings having the sp. gr. smaller than the sp. gr. of the raw water to be treated and, thereafter, the filtered water is discharged outside the vessel. Such device 10 for separating solid from liquid is provided with the partition walls 44 in the vertical direction of the vessel in such a manner that the layer width W attains the prescribed ratio to the layer height H of the floating filter medium layer 22. The treating vessel is provided with the air ejecting means 46 for ejecting the air into the raw water to be treated below the floating filter medium layer 22. The swirling flow is generated by the air ejecting means 46 in the respective areas A to C of the treating vessel 12 partitioned by the partition walls 44, by which the solid-components sticking to the filter media 20 are washed and separated.

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