Abstract: The present invention relates to a communications system for mobile radio telephony comprising mobile devices, comprising modules which can be inserted into the mobile devices, with at least one subscriber territory being fixed inside the total territory covered by the communications system, within which subscriber territory communication takes place from and/or to the mobile devices under special conditions, and comprising means by which it can be determined whether the mobile device is located inside the subscriber territory. In accordance with the invention, the means are arranged on the module or in a determination unit which can be accessed by means of remote polling. The present invention furthermore relates to a method of operating a communications system for mobile radio telephony.

Abstract: A water treatment plant for water purification or the removal of organic matter, suspended solids and other pollutants from water or wastewater is formed from multiple sections of polymer that are assembled to form a pre-treatment chamber, a treatment chamber and a settling chamber. The plant is preferably formed of a polymer, such as HMWPE. The treatment chamber is preferably a biofilm-aeration chamber. An outer tank is comprised of first and second upper sections and first and second lower sections secured by mating flanges. A divider baffle forms an inner wall separating the pre-treatment and treatment chambers. A hanging clarifier baffle is formed to be suspended from the outer tank between the treatment chamber and the settling chamber and includes a lower wall with specific angled portions near an angled wall of a lower section of the tank.

Abstract: A trumpet-shaped slinger atomizes or aerosolizes liquid by lifting liquid from adjacent the surface of the liquid using helically oriented fins rotated by spinning the slinger on a shaft. The lifted liquid is centrifugally forced over an increasing surface area and ejected from an upper edge as droplets. When used in wastewater aeration, radial fan blades on top of the slinger break up foam and increase air circulation while the increased surface area of the droplets increases diffusion of dissolved gasses from the wastewater.

Abstract: A water treatment plant for water purification or the removal of organic matter, suspended solids and other pollutants from water or wastewater is formed from multiple sections of polymer that are assembled to form a pre-treatment chamber, a treatment chamber and a settling chamber. The plant is preferably formed of a polymer, such as HMWPE. The treatment chamber is preferably a biofilm-aeration chamber. An outer tank is comprised of first and second upper sections and first and second lower sections secured by mating flanges. A divider baffle forms an inner wall separating the pre-treatment and treatment chambers. A hanging clarifier baffle is formed to be suspended from the outer tank between the treatment chamber and the settling chamber and includes a lower wall with specific angled portions near an angled wall of a lower section of the tank.

Abstract: The present invention relates to a communications system for mobile radio telephony comprising mobile devices, comprising modules which can be inserted into the mobile devices, with at least one subscriber territory being fixed inside the total territory covered by the communications system, within which subscriber territory communication takes place from and/or to the mobile devices under special conditions, and comprising means by which it can be determined whether the mobile device is located inside the subscriber territory. In accordance with the invention, the means are arranged on the module or in a determination unit which can be accessed by means of remote polling. The present invention furthermore relates to a method of operating a communications system for mobile radio telephony.