摘要:
A method and a plant for the treatment of water or wastewater, having impurities therein by filtration through two granular media filter stages (1, 2) of the moving bed type operated in series, comprising: feeding of said water/wastewater as a first influent to first stage granular media filters; filtration of said first influent in said first stage granular media filters to produce a first effluent; feeding said first effluent as a second influent to second stage granular media filters; and filtration of said second influent in said second stage granular media filters to produce a second effluent; wherein said second stage granular media filters (2) are operated with intermittent washing of the granular filter media.
摘要:
A continuous sand filter plant comprises a plurality of filter modules at least one fluid distributor. By designing the fluid distributor with a length adapted to extend across at least two filter modules of the filter plant, the costs are lower than in prior art filter plants.
摘要:
An apparatus for treating sludge comprises a press (3) for dewatering the sludge, a compaction device (10) for receiving and compacting sludge dewatered by the press, a shredder (23) for receiving and shredding sludge compacted by the compaction device, and a tube conveyor (30) for conveying shredded sludge from the shredder. As a result, it is possible to dewater the sludge to a high degree of dryness at the same time as the dewatered sludge can be transported in the tube conveyor over considerable distances and at any inclination to the horizontal.
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.
摘要:
PCT No. PCT/SE97/01257 Sec. 371 Date Feb. 10, 1999 Sec. 102(e) Date Feb. 10, 1999 PCT Filed Jul. 10, 1997 PCT Pub. No. WO98/01206 PCT Pub. Date Jan. 15, 1998An apparatus for filtering liquids comprises a hollow body which is rotatable about a horizontal axis. Liquid to be filtered is supplied into the interior of the rotating hollow body so that filtrate flows by gravity through filter material of the hollow body into a filtrate container. A sealing structure seals between a stationary circumferential wall, which defines a liquid supplying chamber, and a circumferential liquid impervious wall of the hollow body. Wall structures are arranged to prevent unfiltered liquid leaking past the sealing structure from entering the filtrate container.
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.
摘要:
On insuffle du gaz dans un filtre (1) pourvu d'une couche filtrante granulaire de manière que le gaz s'écoule dans la couche le long d'au moins un bord longitudinal libre de la couche.
摘要:
A filter element (2) for use in a disc filter (1), wherein a plurality of filter elements (2) are arranged on a rotor shaft (3) in a manner allowing liquid communication between the inside (4) of the filter elements (2) and the inside (5) of the rotor shaft (3), for the filtering of liquids. The filter element (2) includes a framework (6) carrying a filter cloth (7) on both its side surfaces (8), wherein the framework (6) and the filter cloth (7) are permanently joined forming a single use filter element (2) and the filter element has at least one passage (21) in each edge (22) for liquid communication between the inside (4) of adjacent filter elements. A disc filter (1) including a single use filter element (2) is also provided.
摘要:
A settling device (1) for liquid treatment including a plurality of inclined, spaced-apart panels (5) each providing an upper settling surface for receiving settled out solid contents of the liquid to be treated, wherein the panels (5) are supported in a box-like structure (2,3,4) including two side walls, and wherein said device includes an inlet or inlets for liquid to be treated and an outlet or outlets for purified liquid. At least one of the side wall sides of the box-like structure (2,3,4) is provided, at the top, with a top portion to be positioned vertically so as to obtain a purified liquid level inside the device between a low level which is below a upper portion of the inclined panels and a high level which is above said upper portion of the panels.
摘要:
In a separating grid (1) for collection and removal of solid particles and objects (4) present in running water (2) and equipped with a separating unit (8) comprising alternate fixed and mobile grid bars (9 and 10, respectively), wherein the mobile grid bars (10) are connected at their upper parts (18) to a drive unit (16) to draw the solid particles and objects (4) step by step out of the water (2) and carry them along the fixed grid bars (9), up to an outlet (17), the mobile grid bars (10) are suspended in the area of their lower parts (19) from a cradle (21) disposed at the lower part (20) of the separating grid (1). Said cradle (21) comprises suspension units (25) on both sides of the separating unit (8), and each suspension unit (25) may comprise an upper rocker arm (27) the lower end (28) of which is articulated to the lower end (29) of the separating grid (1), and also two rocker links (31 , 32) articulated at their upper ends to the rocker arm (27) at a point intermediate the upper and lower ends (28, 34) of said arm and the lower ends (35) to the mobile grid bars (10).