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公开(公告)号：EP0708740B1
公开(公告)日：1999-12-01
申请号：EP94919920.2
申请日：1994-06-08
CPC分类号： C02F3/1226 , C02F3/223 , Y02W10/15
摘要： In the biological purification of sewage water or drinking water,it is known to purify the water in a filter bed of granular filter medium, wherein the filter medium is transported from the bottom of the bed to its upper side with the aid of air, so as to obtain a continuously working filter. It is suggested in accordance with the invention that the amount of filter medium to be transported is divided into two or more parts which are transported in parallel, so as to prevent the flow conditions in the transport tube having a negative effect on the reactivity of the filter bed by decreasing the bacteria strain.
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公开(公告)号：EP0708740A1
公开(公告)日：1996-05-01
申请号：EP94919920.0
申请日：1994-06-08
IPC分类号： C02F3
CPC分类号： C02F3/1226 , C02F3/223 , Y02W10/15
摘要： In the biological purification of sewage water or drinking water,it is known to purify the water in a filter bed of granular filter medium, wherein the filter medium is transported from the bottom of the bed to its upper side with the aid of air, so as to obtain a continuously working filter. It is suggested in accordance with the invention that the amount of filter medium to be transported is divided into two or more parts which are transported in parallel, so as to prevent the flow conditions in the transport tube having a negative effect on the reactivity of the filter bed by decreasing the bacteria strain.
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公开(公告)号：EP0690739B1
公开(公告)日：1997-09-24
申请号：EP94911361.7
申请日：1994-03-24
CPC分类号： B01D24/30 , B01D24/4689
摘要： PCT No. PCT/SE94/00267 Sec. 371 Date Sep. 25, 1995 Sec. 102(e) Date Sep. 25, 1995 PCT Filed Mar. 24, 1994 PCT Pub. No. WO94/22547 PCT Pub. Date Oct. 13, 1994A suspension is delivered to a filter bed comprised of granular filter medium in a continuously working filter at the lower part of the bed and is then permitted to flow upwards through the bed. With the intention of optimizing the capacity of the filter, the suspension is now guided into a central region of the bed. The suspension is divided from this region into at least two specific proportional quantities which are each led from the filter bed in a respective ring-shaped pattern at mutually different heights in relation to the extension of the bed, these ring-shaped patterns having different diameters and each being adapted to the extension of the filter medium in the direction of the diameter.\!
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公开(公告)号：EP0690739A1
公开(公告)日：1996-01-10
申请号：EP94911361.0
申请日：1994-03-24
CPC分类号： B01D24/30 , B01D24/4689
摘要： PCT No. PCT/SE94/00267 Sec. 371 Date Sep. 25, 1995 Sec. 102(e) Date Sep. 25, 1995 PCT Filed Mar. 24, 1994 PCT Pub. No. WO94/22547 PCT Pub. Date Oct. 13, 1994A suspension is delivered to a filter bed comprised of granular filter medium in a continuously working filter at the lower part of the bed and is then permitted to flow upwards through the bed. With the intention of optimizing the capacity of the filter, the suspension is now guided into a central region of the bed. The suspension is divided from this region into at least two specific proportional quantities which are each led from the filter bed in a respective ring-shaped pattern at mutually different heights in relation to the extension of the bed, these ring-shaped patterns having different diameters and each being adapted to the extension of the filter medium in the direction of the diameter.\!
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