Abstract: The invention relates to a device (1), for delivering a liquid into a tank (which can be large, and of any desired footprint), comprising an inlet (2) for a liquid, an outlet (3) for liquid, and means (4) adapted to change flow direction of the liquid gradually towards the inlet (2). In the embodiment, the device (1), includes a single short cone (5) which is fed with incoming liquid from a conduit pipe, or manifold (6). The inlet (2) of the cone (5) is effectively formed by the means (2) to change flow direction which means (2) is in the form of a swept “T” member connected between the conduit, pipe or manifold (6) and the inlet (2) of the cone (5). The cone has angle (?) and entry diameter (d), the swept T has a radius of curvature (R), and the main pipe (6) a diameter (D), height (H) and width (W). For multiple units, additional parameters are number of units, length between units and the height (C) of the cone (5). Multiple unit parameters are selected for particular throughput.

Abstract: The invention relates to a liquid removal apparatus comprising a body for disposal in a mixture of particulate material and a liquid, comprising an inlet adapted to allow entry of substantially only a liquid, and conduit means in liquid communication with the inlet for entrainment of liquid away from the inlet. The inlet comprises a releasable end cap at an end thereof remote from the conduit means that is releasable by means of the conduit means.

Abstract: The invention relates to a flow deflecting device 5, comprising a substantially planar baffle adapted to be disposed in a conduit 2 having a first part 3 defining a first flow direction 3a and a second part 4 defining a second flow direction 4a deviating from the first direction, to promote substantially uniform flow in the second part 4.

Abstract: An apparatus as disclosed for mounting a liquid-filled pipe by the use of ultrasound techniques. The apparatus comprises a vehicle capable of fitting inside the pipe, and of being transported along the pipe by the liquid flowing into it, together with rings of several ultrasonic transducers spaced circumferentially round the vehicle. The rings are so arranged that one ring operates in the reflection mode purely radially while two further rings operate as a pair in a longitudinal refraction mode. A fourth ring is used in a circumferential refraction/reflection mode. The vehicle has an associated power supply, data gathering and storage capability and a vehicle for measuring the distance traveled along the pipe.

Abstract: The invention relates to a liner comprising a flexible material (1) with means adapted to increase the surface area thereof, and adhesive/sealant (2) and a release tape (3) with reinforcing strips (4). An example of a means of adapting the surface, whereby strips of adhesive/sealant (5) are applied to the release tape and then the flexible material (1) applied and compacted to form the profile. The liner is then formed into a tube. It may be folded into a cruciform shape. An end elevational view of a folded liner in a pipe (6) prior to application of the pipe.

Abstract: The invention relates to apparatus for transporting loosened soil from a hole, trench or excavation, comprising a probe device and internal nozzles which are spaced from a distal end of the probe device and are directed towards the longitudinal axis of that probe device. Air pulsed through the nozzles lifts the soil along the tube to a discharge chamber.

Abstract: The invention relates to a liquid removal apparatus comprising a body 1 for disposed in a mixture of particulate material and a liquid, comprising an inlet 2 adapted to allow entry of substantially only a liquid 3, and conduit means 4 in liquid communication with the inlet 2 for entrainment of liquid 3 away from the inlet 2.

Abstract: The invention relates to a non-contact distance measuring apparatus, comprising a casing, a distance measuring means located within the casing for measuring the distance between the distance measuring means and an object using electromagnetic radiation, and the casing being substantially transparent to the electromagnetic radiation used by the distance measuring means.

Abstract: The invention relates to a dresser for dressing particulate material, such as sand, in a slow sand filter of a water treatment works. The dresser includes a frame having transverse mixing members which are adapted to mix the material at or adjacent the surface of the particulate material.

Abstract: The invention relates to a compactor apparatus for compacting granular material, such as granulated activated carbon, when it is laid in a slow sand filter, comprising a plough, a compacting device and a mechanism to provide swivelling of the apparatus in a substantially horizontal plane whereby to compact the material. In the preferred embodiments illustrated, the apparatus is removably mounted on an end of an extensible arm of a tracked vehicle such as a dumper, excavator or digger.

Abstract: The invention relates to a mixing apparatus for maintaining a pressure differential over varying feed rates by mixing a flow of sludge with a flocculant. The mixing apparatus includes a monitor for monitoring the pressure differential across the apparatus and a device for varying the size of an orifice in the apparatus through the sludge flows. The orifice size is dependent on the monitored pressure differential to maintain a desired differential pressure over a range of sludge feed rates.

Abstract: This invention relates to a belt press for dewatering sludge, such as sewage sludge. The press includes a camera to monitor physical operation of a gravity belt section of the press. A numerical control device uses electromagnetic radiation received from the gravity belt section to control the physical operation of the gravity belt section. An actuator device may be used to control a height of a weir for distribution of the sludge over the gravity belt section, and another actuator device may be used to control positions of ploughs which plough the sludge.

Abstract: The invention relates to apparatus for monitoring the depth of a layer of a filter media such as sand in a filter such as a slow sand filter, comprising a leveller, in the embodiment a box leveller with a trailing smoothing device, wheel or roller, adapted to level the surface of the layer of sand and a laser device mounted on a mount which is movable substantially vertically and has a calibration means in the form of a visual calibration scale whereby to determine depth of filter media.

Abstract: The invention relates to apparatus (1) for monitoring condition of a biomass, particularly that naturally occurring in activated sewage sludge, comprising a vessel (2) for holding a liquid in the form of the activated sewage sludge containing a biomass (3), a device in the form of an aeration ring (4) for continuously aerating the sludge (3) in use, a hopper (5) and valve V2 arrangement to dose the biomass (3) in the vessel (2) with an additive in the form of an additional dose or charge of a feed solution, and a dissolved oxygen probe (6) to measure the dissolved oxygen content of the sewage in the vessel (2) whereby to monitor the condition of the biomass. Poisoning of the biomass is detected using the probe and associated electronic equipment (FIG. 3), such poisoning being shown by a sudden reduction in the measurement of the current of oxygen used per dose of sewage feed solution.

Abstract: The invention relates to a device mountable on a dozer blade for skimming a substance to a required depth, comprising an open box or collector for skimmed material, and a cutting edge of a rear wall which is used to effect skimming. The depth of skim is adjustable by height adjusting means which are described in the specification. A slow sand filter may be cleaned using a device according to the invention.

Abstract: The invention relates to apparatus (1) in the form of a treatment vessel comprising a high voidage media bed (2) situated above a low voidage granular media bed (3). Fluid (4) to be treated, combined with an effluent recycle flow stream (5) and intermediate recycle flow stream (6) as appropriate, flows down through the flooded aerated high voidage media (2), through an intermediate section (7) containing a collector in the form of a trough (8) and down through the aerated packed bed of granular media (3). The trough (8) is known as a washout trough. The high voidage media is supported on a support means such as a grille or grid (9). During a cycle any surplus treated water passes out of the intermediate section (7 at 10), while backwash liquors pass out of the vessel at (11). The usual operating level of the liquid in the vessel is shown at (12), treated liquor or effluent passing out of the vessel at (13). Process air passes into the vessel (1 at 14).

Abstract: The invention relates to sedimentation apparatus (1) for treating liquid containing solids, such as sewage, whereby solid constituents of the liquid are substantially removed for subsequent handling/treatment and the liquid now clean of solids is taken off separately for subsequent treatment. To the end, the apparatus (1) comprises two lamella separators (2) the flow channels (3) of which are at an angle to the direction of flow "S" of liquid containing solids towards the inlet (4) to the separators. In the embodiment the angle is substantially 90.degree..

Abstract: A regulated power supply can be derived from a battery supply input and a regulator, but in order to conserve battery power, alternative power supplies can be provided each with a switch responsive to the regulator to connect that alternative power supply to the output when it rises to the level of the battery supply.

Abstract: Apparatus (1) for treating a fluid, in this case wastewater, comprising a vessel or tank (2), a conduit (3) to supply the wastewater in an alternating sequence to the vessel (2), and a source (4) for oxygenating the bed of granular media (5) to provide aerated filter media. The filter bed is aerated during operation by air, oxygen enriched air or other gas being introduced at or adjacent the base (as viewed) of the bed through the source (4), which may be a perforated manifold, diffuser or the like extending substantially over the whole surface area of the bed (5). Also, the bed (5) is a granular media such as natural minerals or blast furnace slag media to the surface of the discrete particles of which is attached bacteria and microorganisms (a biomass) which effects treatment of the fluid.

Abstract: A meter reader 12 analyzes a signal from a meter 22 and compares its structure with a plurality of known signal structures stored in a memory 41. If the comparison shows that a particular one signal structure stored in the memory is inconsistent with the data signal being received, that structure is rejected and not used in future comparisons as the receipt of the data signal progresses. Eventually, the non-rejected signal structures should be reduced to a single structure which by elimination must be the closest structure to that of the signal being read. The meter reader can then pass the received data signal and the identification of its particular signal structure to further processing apparatus 11 such as a signal recorder or signal display and can arrange this recording or display so that parts of the signal representing different properties can be arranged consistently with other data signals which may be of different structures.