Abstract:
The object of the invention is a double-walled chamber for the UV disinfection of liquids, preferably drinking water and/or waste water. It realizes a rectangular and/or square cross-sectional shape of the UV radiation chamber even at higher pressures, whereby the radiation chamber can moreover be provided with a thin-walled configuration and allows an optimal and close arrangement of UV radiators as compared with a round chamber. By applying the inventive idea, the known dead zones at the entrance are completely eliminated and an entrance turbulence is produced which runs simultaneously with the piston flow in the chamber.
Abstract:
A fluid treatment device, preferably for the treatment of water, is described. The device comprises a closed housing having a fluid inlet, a fluid outlet and a fluid treatment zone disposed between the fluid inlet and the fluid outlet. The fluid treatment zone comprises a first irradiation zone and a second irradiation zone. At least one fluid mixing element is interposed between the first irradiation zone and the second irradiation zone.
Abstract:
There is described a novel fluid level control system, particularly useful for controlling the level of water flowing in an open channel. The fluid level control system comprises a gate having a flap portion (3) interconnected to a lever portion (5). The flap portion is rotatable about a first pivot point (8) and comprises a first weight. The system further comprises a frame (1) which is fixed with respect to the flap portion. A linkage (11, 12, 13) interconnects the flap portion and the lever portion, and is connected to the frame at a second pivot point (10) different than the first pivot point (8). Under changing flow conditions in the channel, the present system operates by both : absolute movement of the lever portion and the flap portion, and (ii) relative movement between the lever portion and the flap portion. A fluid treatment system comprising the fluid level control system and a method for controlling the level of a flowing fluid are also described.
Abstract:
An embodiment provides A method for making a non-hazardous iron product for treating wastewater, including: adding sodium bisulfite to a solution comprising iron, creating an aqueous solution; adding an amount of sodium hydroxide to the aqueous solution to increase the pH of the aqueous solution to between 2 - 2.5; determining an amount of sodium bicarbonate and adding the identified amount of sodium bicarbonate to the aqueous solution, wherein the sodium bicarbonate adjusts the pH of the aqueous solution to a desired pH; and providing a buffer to the aqueous solution to generate a slurry. Other embodiments are described and claimed.
Abstract:
An embodiment provides A method for making a non-hazardous iron product for treating wastewater, including: adding sodium bisulfite to a solution comprising iron, creating an aqueous solution; adding an amount of sodium hydroxide to the aqueous solution to increase the pH of the aqueous solution to between 2 - 2.5; determining an amount of sodium bicarbonate and adding the identified amount of sodium bicarbonate to the aqueous solution, wherein the sodium bicarbonate adjusts the pH of the aqueous solution to a desired pH; and providing a buffer to the aqueous solution to generate a slurry. Other embodiments are described and claimed.
Abstract:
There is described a method for assaying for loss of viability of a photosynthetic organism (preferably a microorganism) in an aqueous liquid. In a preferred embodiment, the method comprises the step of using fluorescence to correlate the photorepair index for the organism in the aqueous liquid to survivorship of the organism (preferably a microorganism) after it is exposed to ultraviolet radiation, thereby assessing viability.
Abstract:
There is described a cleaning apparatus for a surface (e.g., a radiation source assembly) in a fluid treatment system. A preferred embodiment of the cleaning apparatus comprises: at least one jet element configured to generate a differential fluid current in a plane that is non-normal to a longitudinal axis of the elongate surface to cause the debris to be removed from the elongate surface. This preferred embodiment of the present cleaning apparatus is particularly advantageous for removing elongate debris from one or more radiation source assemblies disposed in the fluid treatment system. It is preferred to include in the cleaning apparatus a wiping element that is translated between a first position and a second position. As the wiping element is moved from the first position to the second position, it will tend to push the elongate debris toward a distal portion of the radiation source assembly and into the path of the differential fluid current generated by the cleaning apparatus. The differential fluid current will tend to cause the elongate debris to be lifted and/or carried away from the radiation source assembly such that the flow of fluid will carry the elongate debris past the radiation source assembly.
Abstract:
A fluid flow modifier device comprising: an inlet portion for receiving a flow of fluid; an outlet portion for outputting the flow of fluid; and a flow modifier portion disposed between the inlet portion and the outlet portion, the flow modifier portion comprising an outer portion comprising a closed cross-section to the flow of fluid and an inner porous portion configured such that at least a portion of the flow flow received in the inlet portion must pass through the inner porous portion to reach the fluid outlet. The fluid flow modifier device is ideally used to transition fluid flow between an fluid supply line and a fluid treatment zone - for example, a pressure water supply line and an ultraviolet radiation treatment device (e.g., drinking water treatment device).
Abstract:
There is described an element having an immersible portion for contact with an aqueous liquid, the immersible portion comprising a contact surface which is for contact with the aqueous liquid, the contact surface configured to have strong acidity. The invention also relates to a radiation (e.g., ultraviolet radiation) source assembly, a radiation (e.g., ultraviolet radiation) source module and a fluid (e.g., water) treatment system incorporating this element. The present invention is applicable to any surface in contact with fluid that is susceptible to build-up of fouling materials. Thus, the present inventor has discovered an approach which obviates or mitigates the rate of accumulation of fouling on surfaces in contact with aqueous solution, such as the protective (e.g., quartz) sleeves in an ultraviolet radiation fluid treatement system. This approach involves modifying at least a portion of the surface of those sleeves in contact with fluid (e.g., water) to have an inherent strong surface acidity. In some cases, this can obviate the need for complex mechanical cleaning equipment or at least result in a reduced frequency of mechanical cleaning.
Abstract:
There is described In another of its aspects, the present invention provides a radiation source assembly comprising: (i) an elongate radiation source; (ii) a positioning element connected to a proximal portion of the elongate radiation source; and (iii) a connecting portion secured to a proximal portion of the positioning element and configured to engage a support element to maintain a distal portion of the elongate radiation source in a cantilevered position. The present radiation source assembly is configured such that the distal portion of the radiation source is cantilevered with the respect to the distal portion of the protective sleeve in which it is disposed. This feature obviates the need to use spacers, stops, springs and the like in a distal portion of the protective sleeve to maintain correct position of the radiation source within the protective sleeve. Further, the present radiation source assembly is advantageous in that allows for withdrawal of the radiation source from the radiation source assembly without the need to disengage all of the components. Thus, it is possible to replace a single radiation source by removing it from the protective sleeve during operation of the fluid treatment system. This operation can be accomplished quickly without the need to shut down the fluid treatment system or otherwise compensate for the fact that one of the radiation source is being serviced.