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1. 发明专利

JP2001038176A WASHING METHOD FOR MEDICINAL LIQUID IN DYNAMIC FILTER BODY 失效
公开(公告)号：JP2001038176A
公开(公告)日：2001-02-13
申请号：JP21398599
申请日：1999-07-28
申请人： DAIDO HITOSHI , ASO EIJI , KURITA WATER IND LTD , NIPPON STEEL CORP , HITACHI METALS LTD
发明人： DAIDO HITOSHI , ASO EIJI , SUZUKI KAZUO , KISHINE YOSHINAO , SAKATA MORIO , TAKAHASHI NAOYA , HASEGAWA TETSUO , NAGAI MUTSURO
IPC分类号： B01D69/14 , B01D65/06 , C02F3/12
摘要： PROBLEM TO BE SOLVED: To efficiently remove the slime layers sticking to dynamic filter bodies formed with dynamic filter layers for capturing suspended particles on the surface layers of filter cloth and clogging, of sludge, etc., by immersing the filter bodies into a medicinal liquid and aerating the filter bodies from below when the filter bodies are washed. SOLUTION: At the time of medicinal liquid washing, the filter unit 30 is first immersed into the upper part of an aeration pipe 22 in a washing tank 20 and is connected to circulation piping 23. Namely, the circulation piping 23 is connected to a header pipe of the filter unit 30 to absorb the cavity parts of the respective filter bodies and to pass the medicinal liquid from the outer side to the inner side of the filter cloth. Also, the medicinal liquid in the washing tank 20 may be injected into the cavity parts of the filter bodies by a circulating pump p1 and may be passed from the inner side to the outer side of the filter cloth. The filter unit 30 is immersed into the washing tank 20 and is aerated from below in the manner described above and the medicinal liquid is passed through the filter cloth, by which the slime layers sticking to the filter cloth and the compacted and fixed cake layers, etc., may be respectively efficiently removed.

2. 发明专利

JP2000296302A SEWAGE TREATMENT 失效
公开(公告)号：JP2000296302A
公开(公告)日：2000-10-24
申请号：JP10470799
申请日：1999-04-13
申请人： DAIDO HITOSHI , ASO EIJI , HITACHI METALS LTD , KURITA WATER IND LTD , NIPPON STEEL CORP
发明人： DAIDO HITOSHI , ASO EIJI , HASEGAWA TETSUO , NAGAI MUTSURO , KISHINE YOSHINAO , SAWADA SHIGEKI , SAKATA MORIO , FUKUNAGA KAZUHISA
IPC分类号： B01D29/62 , B01D29/01 , C02F3/12 , C02F3/20
摘要： PROBLEM TO BE SOLVED: To provide a sewage treatment device capable of a continuous operation of filter units and also enabling to prevent deterioration of the water quality of treated water. SOLUTION: Sewage water is fed to the sewage treatment device provided with a biological reaction tank 1, plural filter units 3 in which at least one portion of a surrounding wall immersed and arranged along an inflow direction of the sewage in the inside comprises a water passing support body, partitioning walls 4 for partitioning respective filter units, an aeration means provided at the bottom of the biological reaction tank 1, a washing diffusion pipe arranged at the bottom of the filter units and a buffer tank having a lower water level than a water level of the biological reaction tank 1. Then the treated water is taken out from the filter units 3, and also the washing diffusion pipes are selectively operated, thus respective filtering units 3 are alternately washed along the arranging direction.

3. 发明专利

JP2000005785A ACTIVATED SLUDGE FILTER 失效
公开(公告)号：JP2000005785A
公开(公告)日：2000-01-11
申请号：JP17828598
申请日：1998-06-25
申请人： DAIDO HITOSHI , ASO EIJI , KURITA WATER IND LTD , NIPPON STEEL CORP , HITACHI METALS LTD
发明人： DAIDO HITOSHI , ASO EIJI , SAWADA SHIGEKI , SUZUKI KAZUO , SAKATA MORIO , TAKAHASHI NAOYA , HASEGAWA TETSUO , NAGAI MUTSURO
IPC分类号： C02F3/12
摘要： PROBLEM TO BE SOLVED: To prevent clogging of a filtered water passage due to accumulation and solidification of activated sludge on the downstream side of a filter body by communicating one end of a siphon with a filtered water outlet and the other end upward with the inside of a tank storing an activated sludge liq. mixture and supplying air into the siphon. SOLUTION: A siphon 20 is divided by partition walls 20A and 20B into three chambers 22, 24 and 26. Namely, the first ascent chamber 22 rising from the communicating port 21 of the frame 2A of a support 2 is communicated with the descent chamber 24 through the uppermost part 23, and the second ascent chamber 26 is communicated with the descent chamber 24 through the lowermost part 25. One end of such a siphon 20 is communicated with the filtered water outlets 6A and 6B of a filter body 1, the other end 27 is communicated upward with the inside of a tank storing an activated sludge liq. mixture, and pressurized air is supplied to the uppermost part 23 of the siphon 20 through a pressurized air inlet pipe 30 having a stop valve 31. Smooth filtration is continued in this way.

4. 发明专利

JPH11319494A SEWAGE TREATING APPARATUS 失效
公开(公告)号：JPH11319494A
公开(公告)日：1999-11-24
申请号：JP13990798
申请日：1998-05-21
申请人： DAIDO HITOSHI , ASO EIJI , KURITA WATER IND LTD , NIPPON STEEL CORP , HITACHI METALS LTD
发明人： DAIDO HITOSHI , ASO EIJI , KISHINE YOSHINAO , SAWADA SHIGEKI , KONDO MITSUO , TAKAHASHI NAOYA , HASEGAWA TETSUO , NAGAI MUTSURO
IPC分类号： B01D61/20 , C02F1/44 , C02F3/12
摘要： PROBLEM TO BE SOLVED: To maintain a filter flow flux and to form a good and dynamic filter layer with a simple and inexpensive apparatus by providing the apparatus with a filtrate water accepting member which is supported at a float in a biological reaction layer and moves vertically according to the water level in a water tank and a tubular member which leads the filtrate water from the inside of a filter body to the accepting member. SOLUTION: The sewage treating apparatus is constituted by hanging a water collecting pipe 11 to accept the filtrate water from a filtration unit 3 at the float 12 floating on the water surface of the aeration layer 1 by means of a suspension 13 absorbing the vibrations of short cycles. The filtrate water from the filtration unit 3 is introduced by a takeout pipe 14 of a flexible pipe and the filtrate water in the water collecting pipe 11 is discharged outside the tank from a discharge pipe 15 of a flexible pipe. Even if the water level of the aeration tank 1 is fluctuated by the increase and decrease of a raw water volume, the flow 12 moves vertically in follow up thereto and, therefore, the water collecting pipe 11 communicating with the float 12 follows up the movement as well and the water level difference L between the water level W1 in the aeration tank 1 and the water level W2 in the water collecting pipe 11 is kept constant at all times. The filter flow flux corresponding to the water level difference may thus be maintained.

5. 发明专利

JPH11290884A FILTER BODY 失效
公开(公告)号：JPH11290884A
公开(公告)日：1999-10-26
申请号：JP9465198
申请日：1998-04-07
申请人： DAIDO HITOSHI , ASO EIJI , KURITA WATER IND LTD , NIPPON STEEL CORP , HITACHI METALS LTD
发明人： DAIDO HITOSHI , ASO EIJI , SUZUKI KAZUO , SAWADA SHIGEKI , SHIBATA TOSHIYUKI , SAKATA MORIO , HASEGAWA TETSUO , NAGAI MUTSURO
IPC分类号： B01D39/16 , C02F3/12
摘要： PROBLEM TO BE SOLVED: To shorten the time required for clarifying filtered water and to sample the filtered water in a short time by arranging a nonwoven fabric along the outer face of a network body with a mesh of a specified dimension in a filter body for filtering activated sludge. SOLUTION: Nonwoven fabrics 4 are fitted on both faces of a substrate 2 of a filter body through a net spacer (a network body) and are fixed by fitting frames 5. The substrate 2 is formed of a frame-like member whose part facing to the nonwoven fabrics 4 is hollow part 2B and the nonwoven fabrics 4 are fitted thereon through the net spacer 3 so as to close the hollow part 2B and are fixed by the fitting frames 5. In addition, a cleaning water inlet pipe 22A communicating with the hollow part 2B of the substrate 2 from the end face side of the top part of the substrate 2 is disposed and a filtered water outlet pipe 22B communicating with the hollow part 2B of the substrate 2 from the end face side of the bottom part of the substrate 2 is disposed. The nonwoven fabric 4 consists of a polymer such as polyester and polypropylene or a metal material such as copper and stainless steel and the mesh of the net spacer 3 is set at most 5 mm.

6. 发明专利

JP2000084579A SEWAGE TREATMENT APPARATUS 失效
公开(公告)号：JP2000084579A
公开(公告)日：2000-03-28
申请号：JP25586198
申请日：1998-09-10
申请人： DAIDO HITOSHI , ASO EIJI , HITACHI METALS LTD , KURITA WATER IND LTD , NIPPON STEEL CORP
发明人： DAIDO HITOSHI , ASO EIJI , HASEGAWA TETSUO , NAGAI MUTSURO , SAWADA SHIGEKI , SUZUKI KAZUO , KONDO MITSUO , TAKAHASHI NAOYA
IPC分类号： C02F3/06 , C02F1/44 , C02F3/12
摘要： PROBLEM TO BE SOLVED: To provide a sewage treating apparatus which facilitates the attachment and detachment of filtration units and facilitates maintenance. SOLUTION: This sewage treating apparatus has a bioreaction vessel 1 for storing sewage, plural pieces of the filtration units 3 which are immersed and arranged therein along the flow direction of the sewage and of which the circumferential walls consist at least partly of filter media consisting of water permeable supporting bodies and an aeration means which is disposed in the lower part of the bioreaction vessel 1. The apparatus withdraws the treated water by a head difference between the bioreaction vessel 1 and the succeeding vessels having the water level lower than the water level thereof. The upper part of the bioreaction vessel 1 is provided with a water collecting trough 4 extending along the arranging direction of the filtration units 3. The filtration units 3 are connected to the water collecting trough 4 via discharge pipes having stretchability. The respective discharge pipes are so arranged that their free ends exist at substantially the same height from the water level of the water collecting trough 4. The water level of the water collecting trough 4 is so set as to grade downward along the flow direction of the treated water.

7. 发明专利

JPH11319495A SEWAGE TREATING APPARATUS 失效
公开(公告)号：JPH11319495A
公开(公告)日：1999-11-24
申请号：JP13990698
申请日：1998-05-21
申请人： DAIDO HITOSHI , ASO EIJI , KURITA WATER IND LTD , NIPPON STEEL CORP , HITACHI METALS LTD
发明人： DAIDO HITOSHI , ASO EIJI , SAWADA SHIGEKI , KISHINE YOSHINAO , SAKATA MORIO , TAKAHASHI NAOYA , HASEGAWA TETSUO , NAGAI MUTSURO
IPC分类号： B01D61/22 , B01D29/00 , C02F1/44 , C02F3/12
摘要： PROBLEM TO BE SOLVED: To prevent the degradation in water quality even in the case of a change in sludge characteristic or a failure of a filter member and to surely obtain treated water having good water quality by providing the apparatus with a water quality detecting means for detecting the water quality of filtrate water and a control means for controlling the take-out of the filtrate water in accordance with the detected value thereof. SOLUTION: The filtrate water from a take-out pipe 4 is partly sampled and the water quality is detected by a detector 11 through a distributor 10. The detector 11 transmits the opening/closing signal of the stop valves VA, VB of the takeout pipes 4A, 4B by the detected results. Namely, the detected value of the detected water quality is compared with a preset water quality reference value and when the water quality of the filtrate water is judged to be good, the stop valve VA is opened and the stop valve VB is closed to receive the filtrate water in a treated water tank 5 and to take out the filtrate water as the treated water. When the water quality of the filtrate water is judged to be inferior, the stop valve VA is closed and the stop valve VB is opened to receive the filtrate water in a drain tank 8 and to return the filtrate water to an aeration tank 1 without taking out the filtrate water as the treated water or to return the filtrate water to an initial settling basin.

8. 发明专利

JP2001145895A ACTIVATED SLUDGE FILTERING APPARATUS AND ACTIVATED SLUDGE FILTERING METHOD 失效
公开(公告)号：JP2001145895A
公开(公告)日：2001-05-29
申请号：JP32959199
申请日：1999-11-19
申请人： DAIDO HITOSHI , ASO EIJI , HITACHI METALS LTD , KURITA WATER IND LTD , NIPPON STEEL CORP
发明人： DAIDO HITOSHI , ASO EIJI , NAGAI MUTSURO , HASEGAWA TETSUO , SAWADA SHIGEKI , SUZUKI KAZUO , SAKATA MORIO , TAKAHASHI NAOYA
IPC分类号： B01D69/14 , C02F3/12
摘要： PROBLEM TO BE SOLVED: To solve such a problem that SS (activated sludge) flowing in a filtered water chamber through filter cloths 3, 3 is sedimented on a bottom part (the upper surface of a frame body) when filtration is continuted in a filter member having a nonwoven fabric and, if this state is allowed to stand for several days, SS is compacted to become a solidified state to clog a water gathering hole and a filtered water flow passage. SOLUTION: In an activated sludge filtering apparatus wherein a closed space (filtered water chamber) is formed by filter cloth (nonwoven fabric) substantially permitting activated sludge to pass and a support frame for fixing and supporting the filter cloth and filtered water entering the closed space by head difference is discharged out of the closed space through the filtered water flow passage connecting the closed space to the outside, a flow faster than a filtering flow speed is forcibly formed in the filtered water flow passage in order to discharge SS sedimented in the filtered water chamber by continuing filtration out of the filtered water chamber and SS sedimented in the filtered water chamber and a filtered water flow passage is carried by this flow to be discharged along with filtered water.

9. 发明专利

JP2000005786A ACTIVATED SLUDGE FILTRATION DEVICE 失效
公开(公告)号：JP2000005786A
公开(公告)日：2000-01-11
申请号：JP17828698
申请日：1998-06-25
申请人： DAIDO HITOSHI , ASO EIJI , KURITA WATER IND LTD , NIPPON STEEL CORP , HITACHI METALS LTD
发明人： DAIDO HITOSHI , ASO EIJI , SAWADA SHIGEKI , SUZUKI KAZUO , KONDO MITSUO , FUKUNAGA KAZUHISA , HASEGAWA TETSUO , NAGAI MUTSURO
IPC分类号： C02F3/12
摘要： PROBLEM TO BE SOLVED: To provide an activated sludge filtration device capable of continuing smooth filtration by preventing the closure of a filtered water flow passage by deposition and solidification of activated sludge on a secondary side of a filter body and discharging the activated sludge on the secondary side to the outside of the system. SOLUTION: This device is provided with a communicating pipe 20 which communicates at one end 21 with filtered water take-out ports 6A, 6B of the filtered body 1 and communicates at the other end 25 with the inside of a tank in which an activated sludge liquid mixture is stored and a means 30 for introducing and discharging air into and from the air reserving section 22 of this communicating pipe 20. The device is also provided with a means 8 for introducing washing water to the filtered water side of the filter body 1.

10. 发明专利

JPH1119672A ACTIVATED SLUDGE FILTER 失效
公开(公告)号：JPH1119672A
公开(公告)日：1999-01-26
申请号：JP17720197
申请日：1997-07-02
申请人： DAIDOU HITOSHI , ASO EIJI , KURITA WATER IND LTD , NIPPON STEEL CORP , HITACHI METALS LTD
发明人： DAIDOU HITOSHI , ASO EIJI , SUZUKI KAZUO , KISHINE YOSHINAO , FUKUNAGA KAZUHISA , TAKAHASHI NAOYA , HASEGAWA TETSUO , NAGAI MUTSURO
IPC分类号： C02F3/06 , B01D63/08 , C02F1/44 , C02F3/10
摘要： PROBLEM TO BE SOLVED: To stably obtain high-quality treated water in a filter where an activated sludge mixed liq. is filtered by dipping and arranging a plurality of filter bodies through which activated sludge is passed in the activated sludge mixed liq. in a biological reaction tank, forming a layer of depositing biological sludge on the filter bodies and by specifying a space between the filter bodies to each other. SOLUTION: A filter body 1 to be used in an activated sludge filter is fixed by fitting a nonwoven fabric 4 on the both sides of a support 2 through a spacer 3 with a mounting frame 5 and a communicating pipe 21 is provided at two positions of the support 2. A filtered water discharge pipe 22 also used as a purified water inlet pipe is furnished to the communicating pipe 21. The plural filter bodies 1 are dipped and arranged in parallel in a biological reaction tank to constitute a filter body unit. In this case, a space between the bodies 1 to each other which is determined by the quality of raw water and the allowable quality of treated water and is >=8 mm and is made preferably to

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