Abstract: Already-treated sludge is fed back into incoming sewage, and is effective to supply nutrients needed for the microbiological breakdown of the sludge. The feedback sludge has a solids content of 10% or more, and has been sheared and heated to drive its viscosity down to 10,000 cP or less. In sludge done that way, nutrients are preserved and presented to the sewage to be treated in highly liquidised and solubilised form, whereby the nutrients are very bio-available to the microbes in the sewage. Large improvements in the elimination of biomass can result.

Abstract: A residual current device comprises a circuit (CT, 10, 12) for detecting a current imbalance in an AC supply to a load indicative of a residual current and providing a corresponding output. A relay RLA has contacts SW1 in the AC supply to the load. The relay contacts SW1 automatically close when a closing current is passed through the relay and is thereafter maintained closed so long as a holding current, less than the closing current, passes through the relay. A capacitor C1 is connected to the AC supply in parallel with the relay RLA such that, upon application of power from the AC supply, current flows to the charge storage device. An electronic switch SCR2 in series with the relay is turned on when the voltage on the capacitor exceeds the breakover voltage of a Zener diode ZD2 to allow discharge of the capacitor through the relay to provide a current exceeding the closing current, the AC supply thereafter providing a holding current for the relay at least when the supply is at a certain minimum voltage.

Abstract: Disclosed is an adjustable light fixture. The light fixture can include a housing assembly comprising an outer housing surrounding a central opening; a first adjustment mechanism configured to tilt the light source comprising a first rotating member; and a second adjustment mechanism configured to rotate the light source comprising a second rotating member, where the first and second rotating members are substantially parallel to one another. The light fixture can also include a biasing member that will return the housing assembly to a first tilted position from a second titled position.

Abstract: A switching circuit, e.g. an RCD, comprises a pair of mechanical contacts (M) in an alternating current electricity supply (N, L) and circuit means (SCR) for opening the contacts to cut off the supply in response to a switching signal (S). The switching circuit includes further circuit means (Rs, Cs, D2, D3, Q1, Q2) for defining successive periods of time (“activation windows”) during which the magnitude of the supply voltage is not at a maximum and allowing the contacts to open in response to a switching signal only during such windows.

Abstract: A method and system for synchronizing medication configuration information. A primary medication configuration computer is adapted to receive medication configuration content from a medication configuration content source. The primary medication configuration computer is also adapted to generate medication configuration change information and transmit the medication configuration change information to an ancillary medication configuration computer, adapted to receive the medication configuration change information from the primary medication configuration computer. The ancillary medication configuration computer is also adapted to filter the medication configuration change information by applying a filtering rule to generate filtered medication configuration change information.

Abstract: When liquefying sludge, e.g as in U.S. Pat. No. 6,808,636, the combination of temperature, pH, and shearing, is synergistic. Described here is a system that provides for collating test sampling and full-scale data inputs, recording achieved results and the engineering parameters that achieved those particular results. The data is presented in e.g a table format, which assists design engineers to zero-in on the combinations of parameters that will likely give the desired results.

Abstract: Sewage sludge that has been de-watered to 25% solids is subjected to a combination of shearing and heating that liquefies the sludge, and drops its viscosity to below 12,000 cP. The fact of liquefaction prepares the sludge such that subsequent drying can be done more cost-effectively than hitherto. After drying, the dried sludge can be incinerated.

Abstract: The PUK LED light fixture of the present invention includes an LED light source including the necessary electrical componentry to enable the electrical energy applied thereto to cause light to be emitted from the one or more LEDs contained thereon. An LED light source retainer assembly positions the LED light source within the PUK LED light fixture. Underneath the LED light source is a light effects element for changing the characteristics of the light rays emitted from the one or more LEDs. A trim ring is positioned under the LED light source retainer assembly.

Abstract: A system and method are provided for remotely enhancing digital images by communication of the digital images over a network to a remote processing facility. More particularly, the digital image routing method includes steps of receiving a digital image packet that includes a digital image and a customer preference parameter and transmitting the digital image packet to a remote digital image editing system selected according to the customer preference parameter. In addition, the digital image routing method may include the steps of enhancing the digital image based on the customer preference parameter, and transmitting an enhanced digital image packet that includes an enhanced digital image and an enhancement description packet that describes the enhancements made for each of the digital images.

Abstract: A residual current device (RCD) senses a differential current flowing in A.C. mains supply live and neutral conductors and disconnects the supply from a load when the differential current exceeds a predetermined level. The device further includes a circuit for detecting a double grounded neutral fault in which current flows in an N-E loop formed by a double grounded neutral. The current is sensed as a differential current and detected as a correspondence between causing the current to flow and sensing the differential current.

Abstract: A wall-wash light fixture for providing substantially uniform wall illumination includes a light source mounted to direct emitted light to a substantially arcuate kick reflector. The substantially arcuate kick reflector directs the emitted light toward the wall.

Abstract: An improved system and method for providing reduced acid gas/dewatered light hydrocarbon gas to a light hydrocarbon gas liquefaction process wherein a plurality of light hydrocarbon gas liquefaction trains are used.

Abstract: A residual current detection circuit comprises a current transformer CT for detecting an imbalance current indicative of a residual current and a full wave restifier FWR for providing an output whose amplitude corresponds to the magnitude of the residual current. The FWR output is applied simultaneously to two channels. The first channel includes a first comparator COMP1 to provide a first signal which persists during periods when the amplitude of the output exceeds a first level. The second channel includes a capacitor C2 which acquires a charge corresponding to the output level and a second comparator COMP2 for providing a second signal in response to the capacitor voltage exceeding a second level. An output is provided from the circuit only when the first signal is coincident with the second signal.

Abstract: A germicidal quartz lamp producing ultraviolet radiation having a sleeve coated with a titanium dioxide. Titanium dioxide is impregnated or embedded into the sleeve and mechanically held. Ultraviolet radiation having a wavelength of approximately 254 nm generated by the germicidal quartz lamp causes hydroxyl radicals to form on the titanium dioxide surface. The hydroxyl radicals act as a powerful oxidizing agent that destroys pollutants. In one embodiment, different densities of the titanium dioxide coating are formed along the longitudinal length of the quartz lamp. A longitudinal portion of the quartz lamp may be free of any titanium dioxide coating permitting the ultraviolet radiation to pass therethrough creating a germicidal effect. The titanium dioxide may be heated to a temperature above the melting point of the sleeve to create the mechanical bond. The present invention is useful in the commercial food industry or for consumer use.

Abstract: Disclosed are methods for efficiently and economically designing, constructing, or operating a light hydrocarbon gas liquefaction process for the liquefaction of selected quantities of light hydrocarbon gas. The method includes a light hydrocarbon gas liquefaction launch train to liquefy an initial amount of light hydrocarbon gas and one or more optional subsequent modular expansion phases to said light hydrocarbon gas liquefaction train to liquefy additional selected quantities of light hydrocarbon gas up to a selected maximum quantity of light hydrocarbon gas for the process. The methods employ shared use facilities, such as light hydrocarbon feed gas pretreatment facilities, refrigerant compression facilities, cryogenic heat exchange facilities, access services, other liquefaction equipment, and liquefied product storage and shipping facilities.

Abstract: A residual current device (RCD) senses a differential current flowing in A.C. mains supply live and neutral conductors and disconnects the supply from a load when the differential current exceeds a predetermined level. The device further includes a circuit for detecting a double grounded neutral fault in which current flows in an N-E loop formed by a double grounded neutral. The current is sensed as a differential current and detected as a correspondence between causing the current to flow and sensing the differential current.

Abstract: A resettable switching device, e.g. a relay, comprises a fixed contact (18) and a movable contact (28). A solenoid (12) is fixed relative to the fixed contact and a ferromagnetic plunger (20) carries the movable contact. A spring (24) biases the plunger away from the fixed contact so the device is normally open. When the device is set a further ferromagnetic element, e.g. a plunger (22), holds the first plunger (20) in a closed-contact position by magnetic attraction against the action of the spring (24). When a predetermined current condition exists in the solenoid the magnetic attraction between the element and plunger is reduced below the level necessary to hold the plunger so that the movable contact disengages the fixed contact.

Abstract: A residual current detection circuit comprises a current transformer CT for detecting an imbalance current indicative of a residual current and a full wave restifier FWR for providing an output whose amplitude corresponds to the magnitude of the residual current. The FWR output is applied simultaneously to two channels. The first channel includes a first comparator COMP1 to provide a first signal which persists during periods when the amplitude of the output exceeds a first level. The second channel includes a capacitor C2 which acquires a charge corresponding to the output level and a second comparator COMP2 for providing a second signal in response to the capacitor voltage exceeding a second level. An output is provided from the circuit only when the first signal is coincident with the second signal.