A filtration device selectively removes hydrophobic waste from wastewater while leaving other water and surfactant components, which may then be recycled to a point of use. The wastewater treatment system may comprise a filtration unit and filtration media. The filtration unit may comprise a housing having an inlet in fluid communication with an outlet of a point of use and configured to receive a wastewater stream from the point of use for treatment, and an outlet in fluid communication with an inlet of the point of use and configured to deliver filtrate to the point of use. The filtration media may be positioned within the housing. The filtration media may comprise an oleophilic foam substrate and a hydrophobic coating on the oleophilic foam substrate. The filtration media may be configured to separate a hydrophobic component from the wastewater stream to produce filtrate comprising water and surfactant.

An assemblable appliance and method of recycling organic waste into biogas and liquid fertilizer, implementing essentially anaerobic digestion processes, is described. The assemblable appliance includes: a pliant structured exoskeletal envelope, pliable collapsible anaerobic digester and gas tank. A compact kit-of-parts for assembling the aforementioned appliance and respective method using the aforementioned appliance for recycling organic waste into biogas and liquid fertilizer are described.

An apparatus (12) for treating water, in particular for removing surfactants from waste water, includes a vessel (14), defining an inlet (16) for receiving waste water containing air bubbles, and an outlet (20) for the exit of water, following treatment. Inside the vessel there is at least one tubular member (50) having a lower open end (52) into which the flow of waste water from the inlet may be directed in use. The tubular member (50) extends from the inlet towards a top of the vessel where an upper exit (54) from the tubular member is defined. In use, most un-aerated water entering the vessel through the inlet can exit the tubular member at the lower open end. Foam formed in the water by the air bubbles may travel up the tubular member to the upper exit, which is preferably located above the water level (60) in the vessel.

A tank assembly for a gravity-flow graywater filtration system includes a lower portion having a lower-portion sidewall with a port and an upper portion having an extension tank that includes a bottom, an extension-tank sidewall, a removable lid, and an inflow-pipe portion coupled to a first port in the extension-tank sidewall and including a part that extends through a port in the bottom of the extension tank. The tank assembly also includes a filter cartridge housed within the upper portion at a location beneath the extension tank, and a sump pump in the lower portion, the sump pump having an outflow-pipe portion coupled to the port in the lower-portion sidewall.

A modular liquid waste treatment system is disclosed. In accordance with some embodiments, the system includes a central distribution unit and one or more treatment fins in flow communication therewith. The distribution unit may be configured to receive liquid waste from a given source and distribute that waste, at least in part, to one or more treatment fins. In turn, bacteria present in a given treatment fin treat the liquid waste, and the resultant treated liquid may drain from the fin to the surrounding environment. In some embodiments, a given treatment fin may include porous media providing a large surface area on which bacteria may grow to facilitate treatment. The system may be installed in and/or above the ground, and in some cases may be surrounded, at least in part, with treatment sand and/or other treatment media. The system may be used in aerobic and/or anaerobic processing of liquid waste.

An apparatus for separating FOG from grey water in an effluent includes a housing having a first end having two plumbing fittings and a second end having one plumbing fitting. A baffle mounted inside the housing at the second end forms a barrier to flow of liquid toward the plumbing fitting on the second end above a certain height, and allows the flow of liquid past the barrier toward the plumbing fitting on the second end below the certain height. A conduit allows flow of liquid from past the baffle to one of the plumbing fittings on the first end. A plug closes one of the three plumbing fittings, and leaves the other two plumbing fittings available for connection to plumbing from a source of effluent and an outlet for grey water, respectively.

A wastewater recycling system includes a biological reactor having anaerobic, anoxic, and aerobic chambers. A lift station including a pump is operatively connected to the biological reactor. The lift station receives biologically treated liquid from the biological reactor and pumps the liquid from the lift station. A filtration subsystem is operatively connected to the lift station. The filtration subsystem receives and filters the liquid pumped by the lift station. The filtration subsystem includes a salt-rejecting membrane filter comprising a concentrate recirculation conduit operatively connected to recirculate salt-rejecting membrane filter concentrate to a point along the wastewater recycling system upstream of the salt-rejecting membrane filter, thereby forming a salt concentration loop between said point along the wastewater recycling system and the salt-rejecting membrane filter. A post-filtration subsystem is operatively connected to receive salt-rejecting membrane filter permeate, and comprises a water disinfection system that disinfects the permeate thereby generating potable water.

The present disclosure provides a liquid treatment device and a liquid treatment method each capable of efficiently generating plasma and treating a liquid in a short time period. A liquid treatment device according to the present disclosure includes a first electrode, a second electrode disposed in a liquid, an insulator disposed surrounding the first electrode through a space, the insulator having an opening portion at a position in contact with the liquid, and a power supply that applies an AC voltage or a pulse voltage between the first electrode and the second electrode.

An enhanced septic system includes a storage tank having an inlet that receives liquid gray water from a standard septic system having at least one digester and a pump located in the storage tank. The pump is coupled to an actuator to selectively provide power to the pump from a power supply to pump the gray water from the storage tank when the gray water reaches a predetermined level within the storage tank. The system also includes an outlet pipe coupled to the storage tank and to receive gray water pumped from the storage tank by the pump, at least one ultraviolet light in communication with the outlet pipe, and a detector to determine when the pump is actuated and to turn on the at least one ultraviolet light upon actuation of the pump.

The present invention relates to an apparatus for collecting and treating wastewater (1) based on biodegradation-recombination-biodegradation process, comprising: a shell (1.1), the space inside the shell is divided into a first chamber (1.2) and a second chamber (1.3) by a divider wall (1.4), wherein: the first chamber (1.2) contains biological medium suitable for heterotrophic microorganisms growth; the second chamber (1.3) contains biological medium suitable for autotrophic microorganisms and heterotrophic microorganisms growth. The present invention also relates to a system for collecting and treating wastewater combining rainwater drainage used for building, comprising: at least one wastewater treatment apparatus (1) above; a indoor pipe system for collecting and transferring wastewater, rainwater comprising a main vertical pipe (2), substantially horizontal branch pipes; and a outdoor pipe system for transferring wastewater combining rainwater drainage comprising a horizontal pipe (3) for connecting the indoor pipe system for collecting and transferring wastewater, rainwater to at least one wastewater treatment apparatus (1) above.