A tank screen (10) having at least one contact region or contact area (14) for positioning the tank screen relative to a tank inlet, a solid wall (16) having a portion extending above the at least one contact area or contact region (14), and a mesh screen (18) for filtering leaves from water entering the rainwater tank, the mesh screen (18)comprising a mesh side wall (20) that has an upper region located above the at least one contact area or contact region (14), the at least the upper region of the mesh sidewall (20) being at least partly enclosed by the solid sidewall (16).

A platform for sequestering carbon dioxide using a body of water is described. The platform has a vessel for holding solid metal hydroxide and for exposing the solid metal hydroxide to a flow of water to create a solution of a metal hydroxide having a pH level. The solution containing metal hydroxide is released into the body of water, causing a reaction with the carbon dioxide present in the body of water, thereby producing metal carbonate/bicarbonate, thus sequestering the carbon dioxide. A choice of the metal in the metal hydroxide, a rate of the releasing the solution containing the metal hydroxide into the body of water, and a flow rate of the flow of water so that to substantially maintain the solution containing the metal hydroxide at the pH level that is defined as environmentally safe and not changing chemistry of seawater. A corresponding method is also provided.

A method and apparatus for removing a layer of sediment which has settled on the bottom of a large water body includes using a structural frame configured to contain a bottom water flow and for containing liquid and suspended particles dispersed during removal of bottom sediment in a suctioning area that is at least about 3 square feet, up to and including 8 square feet, that has support elements and/or silt containing elements, with a plurality of supporting wheels. A sediment removing vacuum unit is operably associated with the structural frame to conduct suctioned bottom water flow through suction lines to a filtering station outside of the water body, such that the water can then be returned to the large water body.

A device for the filtration and purification of wastewater, such as grey water, aimed at providing a new clean and safe water source, comprising: a tank for collecting the water to be treated, comprising an inlet or opening for routing the water to be treated and for discharging the water once filtered and purified; a biocarrier container, placed inside the tank, comprising a plurality of biocarriers containing grown microorganisms, which purify the water; an aeration unit configured to supply oxygen inside the tank in order to promote the aerobic metabolism of the microorganisms and to prevent the appearance of bad odors; and a biocarrier for the growth of microorganisms for the filtration and purification of wastewater.

The disclosure relates to methods and processes for protecting food supply, organisms including fish and aquatic life, and plants from mercury accumulation by reducing the presence of methyl mercury in ecosystems, sediment, and pore water. The disclosure including treating sediment and/or pore water with an amendment that contains a sorbent and a halogen source, or a halogen containing sorbent.

A mixed matrix membrane that includes polyvinylidene fluoride and TiN nanoparticles may be useful solar-driven surface heating membrane distillation. The plasmonic character of the TiN nanoparticles may locally heat the membrane when exposed to sunlight, which increases the distillation flux across the membrane. Said distillation methods may be particularly useful for treating laundry wastewater to collect distilled water with a reduced concentration of chemical oxygen demand, a reduced concentration of total dissolved solids, and a reduce conductivity. The distilled water may be repurposed for a variety of purposes including agricultural irrigation with significant less impact on the aquatic ecosystem compared to the laundry wastewater.

This invention is a portable fountain which pumps the hypolimnion to spray above the surface in a stratified body of water fountain resulting in aeration and heat transfer by accessing sub-thermocline depths. There are prior art fountains which circulates a stratified body of water, however these are permanent installations often connected to a commercial power grid. Other, portable-type fountains are not designed to access sub-thermocline depths and do not adequately circulate the hypolimnion. Thus a need exists for a portable fountain which circulates and aerates a stratified body of water for use in areas which lack a permanent fountain system. Applications of this invention involve aeration, temperature fluctuation to cool the surface during summer, and temperature fluctuation to warm the surface during winter. Benefits of this device include comfort for swimmers in hot weather, prevention of ice formation in the winter, and overall environmental improvement due to aeration.

The present disclosure provides an intelligent low-carbon treatment and reuse system for stormwater and wastewater, including: a bioretention module for collecting stormwater and treating it to obtain treated stormwater; a numerically controlled drainage module for collecting oxidation-reduction potential data and pH data of the treated stormwater and transmitting them to a control module as environmental data, and discharging treated stormwater for a preset time period based on a first control signal sent by the control module; a stormwater and wastewater collection module for storing the discharged treated stormwater and maintaining water storage volume within a preset range; an irrigation module; and the control module. Stable, efficient and low-carbon treatment and reuse of stormwater and wastewater are achieved.

A fluid management system can include a first chamber, a diffusion plate positioned in the first chamber configured to receive fluid and to direct the fluid along a bypass fluid flow path or a primary fluid flow path, a riser pipe positioned within the first chamber that conveys fluid from the diffusion plate into a second chamber, and a filtering apparatus positioned in the second chamber. The filtering apparatus can include a plate having a first opening, one or more modules coupled to the plate having one or more perforations and a second opening corresponding to the first opening, and filter media disposed adjacent to the one or more modules, and a slab positioned above the filtering apparatus.

An ecosystem for deep water environment restoration includes: a light-collecting device; an underwater lighting system connected to the light-collecting device and configured to provide light to a deep water layer of a water body; a photocatalytic bionic net comprising a photocatalytic material and a fiber and placed in the deep water layer; and an aquatic plant. When the photocatalytic material receives the light, the photocatalytic material is able to adsorb organic pollutants of the water body to the photocatalytic bionic net and catalyze degradation of the organic pollutants of the water body, concentrate microorganisms to allow the microorganisms to decompose the organic pollutants into nutrients required for growth of the aquatic plant, and absorb the light to catalyze decomposition of water to produce oxygen. When the aquatic plant receives the light, the aquatic plant is able to perform photosynthesis to release oxygen.