A water recycling system for reprocessing and reusing bathing water from a bath or shower. The bathing water recycling system treats and reuses water that overflows from a bathtub or shower pan. The used bathing water is captured and retained after use. The captured dirty water is then filtered and purified. The filtered and purified water can be redistributed back into the shower or bathtub for reuse alone or in combination with additional fresh water. The treated water may also be rewarmed prior to reuse. Unneeded greywater water is redirected to the drain for disposal.

An ecological slope protection has an efficient water purification function, built in a land-lake ecozone along the bank of a basin, wherein the body of the ecological slope protection extends into the water of the basin, and has a flexible mattress laid on the surface thereof; an ecological filter pool is provided below the flexible mattress and is isolated from the water of the basin by means of the pool body; the ecological filter pool is contained with a filler layer and a support layer, and the filler layer is supported by the support layer; the sewage pretreated via a sedimentation pool is introduced into the ecological filter pool and treated by the filler layer to clean up pollutants therein and reduce its eutrophication level; and the treated sewage is discharged from the ecological slope protection via the support layer and enters the basin.

In a method for extracting boron from feed water, a backwash operation is performed on a boron-saturated resin bed within a pressurized vessel, wherein the resin bed includes boron-selective resin for extracting boron from the feed water. An acid-based solution is injected into the boron-saturated resin bed, causing the boron to be released from the resin bed and into a boron solution. The boron solution is drained from the pressurized vessel into a holding tank. An acid displacement rinse operation is performed on the resin bed. A caustic solution is injected into the resin bed, the caustic solution recharging the resin bed for extracting the boron from the feed water. A caustic displacement rinse operation is performed for preparing the resin bed for receiving the feed water. Surplus water of the acid displacement rinse operation and the caustic displacement rinse operation are distributed to a source of the feed water.

The present disclosure relates to devices, systems, and methods for using foam fractionation to remove non-polar waste molecules, including, but not limited to, sewage bacteria, environmental contaminants, and/or sediment/turbidity caused by dredging activities, from open-water aquatic environments. Some foam fractionation systems disclosed herein generally include a plurality of floating foam fractionation devices, each floating foam fractionation device including a floating body, a submerged hood coupled to the body, and at least one submerged air conduits for releasing bubbles into the surrounding water. Other foam fractionation systems disclosed herein generally include a submerged bubble generation device and a floating intake unit positioned remotely from the submerged bubble generation device.

Adaptive buildings and building envelopes having a system of structural members which also function as one or more selectively independent fluidic transport systems. Fluids to be transported such as air, rainwater, potable water, irrigation water, and/or gray water, are moved about the adaptive buildings via the various fluidic transport systems to locations disposed about the adaptive buildings where they are used as needed. Such fluids are also selectively filtered and cleaned by a plurality of filter plate systems disposed about the structure.

A rain head comprising a lower body, a screen and an upper body. The screen includes a frame having a trough or recess. Lower parts of the sidewalls of the upper body 14 can fit into the trough or recess to enable the upper body to be removably mounted to the rain head. The screen also includes a peripheral flange and a downwardly extending lip that enable the screen to be removably mounted to the upper part of the lower body. At least some water splashing off the screen during a rain event comes into contact with the upper body and is re-directed to flow into the lower body and out through the outlet of the lower body to a rainwater collection tank. The screen and upper body may be provided separately to the lower body.

Embodiments disclosed here include a containment system and methods of containment which may include a segmented buoyant rim. Certain embodiments also include an inflatable rim with at least one inflation/deflation valve in the rim segments and ballast in the rim segments. Additionally, certain embodiments include material connected to the rim segments, to enclose a void created in the rim and to hang below the buoyant rim.

An iron containing bioreactor for treating explosive compounds and other organics in contaminated surface water is disclosed. The bioreactor can be located either on-ground or in-ground at a location across which contaminated surface water flows. In one configuration the reactor is made up of (i) indigenous microbes, (ii) acetate, (iii) a low density iron-containing bed, and contains anaerobic zones in at least one portion of the flowpath. The reactor reduces the concentration of explosive compounds to below 10 ppb and also maintains this explosive compound reduction level for a period of at least one year without replenishing the microbes or iron.

Techniques and systems for neutralizing discharge waters from ballast and/or cooling water biocidal treatment and disinfection systems are provided. The systems utilize, inter alia, oxidation reduction potential control to regulate the dechlorination of an electrocatalytically generated biocidal agent to allowable discharge levels in ship buoyancy systems and ship cooling water systems.

A liquid treatment system and methods for removing contaminants from a liquid flow is disclosed. The treatment system having a treatment zone, a nanobubble diffuser system and a skimmer cassette assembly configured to remove the nanobubble and contaminant agglomeration from the liquid flow. The nanobubble diffuser system configured to diffuse negatively charged nanobubbles into the liquid flow whereby the nanobubbles adhere to positively charged contaminants and the nanobubble and contaminant agglomeration is urged to float towards a surface of the liquid flow in the treatment zone and be removed by the skimmer cassette assembly. In some embodiments, larger bubble diffuse systems are provided to increase the rise rate of contaminants. In some embodiments, the treatment system is a floating vessel. In some embodiments, the treatment system is configured to remove microplastics down to a size of about 1 mm and less.