Described herein is aerobic granular sludge gravity-driven membrane system, methods of making and using thereof are described. The aerobic granular sludge (AGS) integrated with a gravity-driven membrane (GDM) filtration system is an energy efficient wastewater treatment system that takes advantage of AGS reactor systems integrated with gravity-driven membrane system to reduce membrane fouling and produce microbiologically and chemically safe water. The AGS-GDM system includes at least an AGS reactor tank containing raw wastewater and granular sludge and a membrane tank including one or more gravity-driven membrane(s).

Disclosed is a water softening system includes a first and a second filter unit that selectively performs any one of a removable mode discharging soft water including less ionic material than a source water, and a recycling mode of discharging reclaimed water including more ionic material than the source water, a first and a second supply passage that supplies the source water to the first and the second filter unit, a first and a second discharge passage that discharges the soft water or the reclaimed water from the first and the second filter unit, a first recovery passage part that guides at least a portion of the reclaimed water in the first discharge passage to the second supply passage, and a second recovery passage part that guides at least a portion of the reclaimed water in the second discharge passage to the first supply passage.

The present invention has an object of providing a fluid sterilization device that can effectively use wide-angle light of ultraviolet light emitted from a light source unit and allows a fluid to stay in an irradiation range of the ultraviolet light even with a quite simple structure. The fluid sterilization device according to the present invention includes a first flow path portion that extends in an axial direction and allows a fluid to pass from a first end to a second end, a light source unit that is connected to the second end of the first flow path portion and irradiates the fluid with ultraviolet light, a second flow path portion that is opposed to the first flow path portion with the light source unit interposed between the first flow path portion and the second flow path portion, and a third flow path portion that is arranged outside of the light source unit in a radial direction and is configured to allow the fluid flowing through the first flow path portion to flow into the second flow path portion. In the fluid sterilization device, the first flow path portion or the light source unit includes a first communication portion that communicates with the third flow path portion, the second flow path portion or the light source unit includes a second communication portion that communicates with the third flow path portion, and the third flow path portion is any of polymers including polytetrafluoroethylene (PTFE), a perfluoroethylene propene copolymer (FEP), perfluoroalkoxyalkane (PFA), and polypropylene (PP). The first communication portion includes a cut-out communication region that is formed by cutting out a part of a connection portion between the first flow path portion and the light source unit.

This invention aims at providing large amounts of fresh water using minimal electrical energy by extracting humidity in the air using temperature differences between the surface of a large water reservoir, like a sea, river or ocean, and its depth. It simulates the rainfall process, which occurs, when wet air hits on a cold surface, trapping components of the cloud before reaching the upper layers of the air. It directs the humid air from the surface of the reservoir into the device, where it is guided through adequately designed pipes, inflicting on the air stream changes in temperature and pressure, sufficient to form water drops. Sensors connected to a case-based expert system measure heat, humidity, pressure and flow of air and water in different parts of the device and enable the control of generated water amounts as well as diagnosing any failures enabling reliable, optimized and secure operation.

The present invention provides a membrane bioreactor module including base and upper assemblies between which extend an array of fibre membranes, the module further including four corner supports or columns extending between the base and upper assemblies at least one of which defines an internal fluid pathway from the base assembly to the upper assembly to facilitate the removal of permeate from the base assembly.

A pet water fountain is described comprising a bowl for holding an aqueous drinking fluid. The pet water fountain includes a housing configured to cover a portion of the bowl and have a fluid reservoir. The pet water fountain includes a rotatable cone positioned within the housing, the cone tapering outwardly from a bottom end to a top end, the bone bottom end having a fluid inlet to allow the passage of fluid from the bowl through the inlet and into the interior of the conde, the cone top end being in fluid communication with the housing fluid reservoir. The pet water fountain includes a filter ring coupled to the cone top end, the filter ring having an exterior housing and a filter media positioned within the exterior housing, and an electric motor coupled to the rotatable cone for rotatably driving the rotatable cone.

A gas-liquid-solid separator can include a separator body having a vertical outer wall and a gas collector having a vertical gas collector wall surrounded by the outer wall, with a gas inlet opening at a bottom of the gas collector. An annular volume between the gas collector wall and the outer wall can contain a plurality of inclined flow channels. The flow channels can have a channel inlet opening at the bottom and can slope upward following a helical path between the gas collector wall and the outer wall. A gas-liquid-solid mixture inlet opening can be in a floor of the separator body. The mixture opening can be positioned below the gas inlet opening and the mixture inlet opening can have a top-down profile that fits within a top-down profile of the gas inlet opening.

A pet water fountain is described comprising a bowl for holding an aqueous drinking fluid. The pet water fountain includes a housing configured to cover a portion of the bowl and have a fluid reservoir. The pet water fountain includes a rotatable cone positioned within the housing, the cone tapering outwardly from a bottom end to a top end, the bone bottom end having a fluid inlet to allow the passage of fluid from the bowl through the inlet and into the interior of the conde, the cone top end being in fluid communication with the housing fluid reservoir. The pet water fountain includes a filter ring coupled to the cone top end, the filter ring having an exterior housing and a filter media positioned within the exterior housing, and an electric motor coupled to the rotatable cone for rotatably driving the rotatable cone.

The application relates to a fluidized adsorption device and a fluidized adsorption method for sewage treatment. The fluidized adsorption device comprises a fluidized adsorption column and a reflux device, wherein the fluidized adsorption column is consisted of a water outlet area, a fluidized adsorption area and a water inlet area from top to bottom; the reflux device includes top, middle and bottom reflux ports, and related reflux tubes; and the top reflux port and the bottom reflux port are activated during adsorption, and the middle reflux port and the bottom reflux port are activated during adsorbent replacement, such that the fluidized adsorption column can run continuously.

A floating carrier for water heavy metal removal reagents includes a carrier floating cover, an outer bracket, an inner bracket, multiple reagent filter cylinders, water flow channels, a microfluidic channel and micro channels. The carrier floating cover is a hollow shell structure and configured to provide buoyancy in the water. The reagent filter cylinders are respectively disposed in carrying positions, and are configured to accommodate and support the heavy metal removal reagents. Each water flow channel is defined in a middle part of the outer bracket with a venturi tube structure and configured to guide water flow through the floating carrier. The microfluidic channel is defined within the outer bracket and connected to the water flow channels and the micro channels. The floating carrier has characteristics of simple form, large reagent contact area and anti-fouling, meeting needs of heavy metal remediation in the water.