A system and method for removing contaminates from greywater that uses carbon dioxide (CO.sub.2) and a system that adjusts the pH between 6 and 9. The filtration system is cost effective, quick, and easy to use, resulting in purified water.

A water purifier includes a water purification unit, and an ice making unit. The water purification unit includes: a water filter for filtering introduced raw water to provide the purified water and unfiltered living water; a purified water tank including a first storage for storing unfiltered water, a second storage for storing the purified water discharged from the water filter, and a separation membrane formed of an impermeable material which independently partitions the first storage and the second storage and has elasticity, wherein the second storage shrinks when the first storage expands, and the first storage shrinks when the second storage expands; a flow channel connecting the water filter, the purified water tank, and the ice making unit to provide a passage through which the raw water, the living water, and the purified water flow; and a valve unit including a plurality of valve modules.

A method for directly and deeply purifying high concentration organic wastewater, specifically includes the following steps of: (1) fortified precipitation treatment; (2) rapid filtration of sediment of suspended solids; (3) pH value adjustment; (4) hydrolysis acidification where pH value adjusted waste water enters a water distribution unit in which a biological hanging film filter is arranged to fortify an anaerobic hydrolysis acidification function of the waste water; and (5) bio-filter treatment. A rapid and low cost treatment method for high concentration, high ammonia and high nitrogen organic waste water is provided by means of water and air distribution by the biological filtering bed, an air-water backwashing bed layer structure, setting of a temperature regulation system for the biological filtering bed, and a combined process of the biological filtering bed with a fortified sedimentation unit, a suspension object sediment rapid filtration unit, and like unit structures.

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 magnetization purifying device is provided. At least one or more accommodation spaces formed inside a housing unit along a preset depth or a width status are formed for accommodating a preset amount of magnetization purifying devices having corresponding status, a covering unit having an outwardly-extended engaging segment is provided and capable of being rotated for being matched with an opening formed at one end of the housing unit, another end of the housing unit capable of accommodating the magnetization purifying devices is formed with a recessed engaging segment, so that the magnetization purifying device can perform a predetermined rapid circulating magnetic force line cutting operation to introduced water or air, thereby enabling the water or air fully magnetized and discharged to be provided with anticipated pure oxygen and negative ions, thus the dissolved oxygen in water in a predetermined route, for example an aquaculture pond, can be increased.

A sewage and seawater purification apparatus has a first pump, a coarse filter, a second pump, a first centrifugal filter, a third pump, a second centrifugal filter, a fourth pump, at least one electro dialysis device, and an end storage tank. The coarse filter is connected to the first pump. The second pump is connected to and communicates with the coarse filter. The first centrifugal filter is connected to and communicates with the second pump. The third pump is connected to and communicates with the first centrifugal filter. The second centrifugal filter is connected to and communicates with the third pump. The fourth pump is connected to and communicates with the second centrifugal filter. The at least one electro dialysis device is connected to and communicates with the fourth pump. The end storage tank is connected to and communicates with the at least one electro dialysis device.

A water intake and pretreatment system (10) comprising an inlet for delivering water from a natural source to a reservoir (12); said inlet to reservoir having a net screen (16) to prevent entry of organisms above a predetermined size and including a one-way gate (30) to allow organisms to exit the reservoir; said reservoir further comprising a granular filter media for water and algae filtration; and a drainage layer for removal of filtered water from the granular filter media to a drainage outlet. A local backwashing apparatus (40) is included for localized backwashing of the granular filter media.

A membrane filter apparatus for splitting a feed into filtrate and retentate is provided. The apparatus comprises a body chamber, a feed inlet disposed on the body chamber, a retentate outlet located in the body chamber, a feed distribution tube connected to the feed inlet, and a filter assembly having a filter. The feed distribution tube has a length sufficient to cause the feed to enter the body chamber at a feed distance from the filter assembly of no greater than 50% of a total length of the body chamber. The feed flows across the filter in a direction parallel to a surface of the filter assembly. The filtrate passes through the filter assembly and the retentate flows through the body chamber in a direction antiparallel to the feed flow through the feed distribution tube and out through the retentate outlet.

A water purification filter element is provided. The water purification filter element may include a filter bottle, a filter material, an end cover, and a water self-stopping and passing structure.

A wastewater treatment system includes a reservoir, a parameter-adjusting subsystem, and a release mechanism. The reservoir is configured to receive waste liquid from a production system and to hold liquid under treatment including the waste liquid. The parameter-adjusting subsystem is configured to measure a parameter of the liquid under treatment and to treat the liquid under treatment to adjust the parameter. The release mechanism is configured to release the liquid under treatment from the reservoir under control of the parameter-adjusting subsystem. A process of treating waste liquid includes receiving waste liquid from a production system into a reservoir, holding liquid under treatment including the received waste liquid in the reservoir, measuring a parameter of the liquid under treatment, treating the liquid under treatment to adjust the measured parameter, and releasing the liquid under treatment from the reservoir after treating the liquid under treatment.