A method of removing nitrogen and phosphorus from waste water by using an activated sludge including aerobic bacteria is disclosed. The waste water is fed continuously and gradually into a treatment basin in which the sludge is contained so that a mixed liquor consisting of the waste water and the sludge is formed therein. A cycle consisting of an agitating step and an aerating step is repeated at...

A method of removing nitrogen and phosphorus from waste water by using an activated sludge including aerobic bacteria is disclosed. The waste water is fed continuously and gradually into a treatment basin in which the sludge is contained so that a mixed liquor consisting of the waste water and the sludge is formed therein. A cycle consisting of an agitating step and an aerating step is repeated at...

A method of removing nitrogen and phosphorus from waste water by using an activated sludge including aerobic bacteria is disclosed. The waste water is fed continuously and gradually into a treatment basin in which the sludge is contained so that a mixed liquor consisting of the waste water and the sludge is formed therein. A cycle consisting of an agitating step and an aerating step is repeated at...

A finite impulse response sampled data filter is provided with parallel tapped delay lines (37-41; 32-36) to one of which scaled (31) input samples are applied and to the other of which non-scaled samples are applied. The scaled and non-scaled signal samples from the parallel tapped delay lines are both made available to weighting circuits (42-46) for utilization thereby in producing weighted samp...

The invention relates to a coil arrangement intended for an NMR testing apparatus for collecting NMR information about a target to be examined, said arrangement comprising first coil means (2) for exciting the nuclei of a target area and for receiving a signal emitted by the nuclei of a target area. The arrangement further includes second coil means (6) for gaining the amplitude of a signal emitte...

After heating in a heat absorber (1), desalinated water is collected in a tank (4), from which it is fed via pipes (26, 28, 30) to taps (29, 31). Hot water at the taps is obtained by non-distilled water in the solar energy absorber being heater, and then heating the tap water in one pipe (28) in a heat exchanger (5). - The non-distilled and also unused water is fed back to a position (6) from whic...

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The water which is to cleaned into the contact bed which contains fillers which are kept in place by a removable grill before leaving for further treatment. Air is blown into the bed from underneath via an aeration arrangement. If the bed is to be reused, the grill is lifted up for a short time and the filler is rotated to clean it.

A container has inlet and outlet components for the fluid to be cooled, and similar provision for the fluid to be heated. Air is blown in through apertures (7, 8) provided on one or both sides around the lower edges of the sheets (2). - The sheets are supported by vertical beams (2') and possibly by a network . They are rendered taut by a longitudinal weight .