A bubble generating device for sewage purification includes: an outer cylinder 6 vertically placed in water; an injection port 2A placed at a lower central portion in the outer cylinder 6 for upwardly injecting air as bubble flow supplied from an air supply source; and microbubble generating device 3 placed higher than the injection port 2A for refining bubbles injected from the injection port 2A. A throat portion 30 for narrowing a flow path of bubble flow and water flow which rises in the outer cylinder 6 is placed between the injection port 2A and the microbubble generating device 3.

The invention relates to a sewage pit (1, 60) for receiving and discharging waste material, particularly domestic, medical and/or industrial waste comprising liquid and solid constituents, to the sewer (52), the sewage pit comprising: —a housing (2, 3, 4) with a closable receiving space (9), wherein one or more of the walls of the housing is provided with at least one inlet (19) configured to carry the waste material into the receiving space, a flushing liquid feed (10) which is embodied to feed flushing liquid to the receiving space for bringing the waste material into suspension, and at least one outlet (29) which can be connected to the sewer and is configured to discharge the mixture of waste material and flushing liquid from the receiving space and to the sewer, —at least one pump (25, 26) connectable or connected to the one or more outlets which is configured to pump the mixture which has been brought into suspension from the receiving space and to discharge the mixture via the one or more outlets.

An ion removal device includes a hard water storage section configured to store hard water; and a fine bubble generation means configured to generate fine bubbles and supply the bubbles to the hard water storage section, wherein, in the hard water storage section, metal ions in the hard water are adsorbed to the fine bubbles to be removed from the hard water.

Methods and systems for sanitization of liquid solutions and food products are provided. In some embodiments, methods are provided for treating a food product or food product preparation or packaging surface to reduce microbial content, comprising contacting the food product or food product preparation or packaging surface with a chlorinated nanobubble solution comprising electrolyzed water. In some embodiments, methods are provided for reducing the growth of bacteria and reversing the growth of biofilm in a water system, comprising chlorinating source water and passing the chlorinated source water through a low zeta potential crystal generator. In some embodiments, methods are provided for purifying water, comprising chlorinating the water and passing the chlorinated water through a low zeta potential crystal generator.

The efficiency of water disinfection can be significantly increased by supplying the ozone in combination with oxygen to an inlet of a cavitation pump or a line atomizer. A compressor can be introduced at an inlet of the cavitation pump or the line atomizer, compressing the gas mixture at a pressure higher than the pressure within pump or the atomizer. The compressed gases are provided to the inlet of the atomizer or the pump, where the compressed gases mix with the water and enter the cavitation pump or the line atomizer (where most of the dissolution of the gases happens). The compressor allows to increase the amount of oxygen and ozone provided to the pump or the line atomizer, increasing their dissolved concentration. In addition to the disinfecting properties, the higher level of oxygen correlates to an improved taste of the water.

Provided is a UFB generating apparatus that can achieve compactness, power saving, and low cost. To this end, a liquid containing unit for supplying a liquid to a UFB generating head is fluidly linked to the UFB generating head at a position higher than the UFB generating head in a direction of gravitational force.

A magnetic fluid treatment system chamber for treating water for agricultural and other uses includes a fluid inlet and a fluid outlet opposite the fluid inlet. A fluid flow path runs from the fluid inlet to the fluid outlet. A plurality of ferrous metal rods is located circumferentially-spaced about the flow path. The ferrous metal rods are parallel to the flow path. A plurality of axially oriented magnets each has a north face and a south face. Each of the faces of the axially oriented magnets abuts one of the ferrous metal rods.

A system for creating an oxidation reduction potential (ORP) in water employs a manifold. The manifold includes an enclosure containing a plurality of fluid paths and having one or more ozone intake ports. The ozone intake ports are fluidically coupled to one or more ozone output ports of an ozone supply unit housed in a separate enclosure. A plurality of flow switches are disposed within the enclosure and configured to transmit control signals to one or more controllers of the ozone supply unit in response to sensing a flow of water through the fluid paths in order to cause the ozone supply unit to generate ozone. A plurality of fluid mixers are also disposed within the enclosure. The fluid mixers are fluidically coupled to the ozone intake ports and configured to introduce the ozone generated by the ozone supply unit into the water flowing through the fluid paths.

A system for treating medical sewage containing SARS-CoV-2 based on nano graphene, including a medical sewage collection and transportation device, primary and secondary sedimentation tanks, a filtering device, primary, secondary and tertiary graphene sterilization devices, a multiple purification tank, a photocatalytic degradation device, a SARS-CoV-2 deep purification device and a graphene water purification device including at least three stages of graphene water purification units. The disclosure also provides a method for treating the medical sewage containing the SARS-CoV-2 using the above system.

The present invention relates to a method and a device for preventing and controlling pollutants in basin water resources utilization. The method includes: providing a hydrolysis tank (1), a nano-aeration tank (2) and a vertical subsurface flow constructed wetland (3) connected in sequence, salvaging duckweed and algae in the basin, then crushing, acidizing and digesting them in the hydrolysis tank (1), importing the supernatant obtained in the hydrolysis tank (1) into the nano-aeration tank (2), then mixing the water from the nano-aeration tank (2) with basin water and importing them into the vertical subsurface flow constructed wetland (3), treating to obtain basin water meeting the irrigation requirements.