It discloses a system for controlling heavy metals and a method for preventing and controlling heavy metals using the same. The system includes a constructed wetland (3), in which several layers of fillers are laid, so that water is allowed to flow through each layer of the filler to remove heavy metals. Preferably, a sandwich wall is constructed around the constructed wetland (3), and organic matters (12) which generating heat through fermentation is filled in the sandwich wall to supply heat to the constructed wetland (3) in winter. The sandwich wall is easy to build and the fermentation materials are cheap and easily available, thereby the present method is able to effectively solve the difficulties occurred in the operation of constructed wetland in winter.

The present invention relates to a method and a device for controlling pollutants in basin water used for irrigating farmland in extremely water-scarce areas. The device includes an alternate vertical flow constructed wetland, which is constructed 4-10 m far from basin revetment. After feeding basin water into the constructed wetland, pollutants, such as heavy metals, nitrogen, phosphorus and organic matters, are adsorbed or degraded through the constructed wetland, and then the treated basin water is transported to the farmland.

The present invention relates to the field of water environment treatment, and particularly discloses a method for restoring an ecological environment by utilizing emergent aquatic plants. According to the present invention, by arranging a magnetization reactor around the emergent aquatic plants to carry out intermittent magnetization induction on the emergent aquatic plants, the available quantity of plant root systems for mineralized substances in a micro-environment, such as inorganic phosphorus and the like, is increased, the limitation of maximum biomass is broken through, the oxygen conveying effect of the roots of the aquatic plants is promoted, and the hydraulic transmission effect is maintained and enhanced; and under the condition that the planting density of the plants is not increased, the pollutant absorption and conversion capacity of the emergent aquatic plants is promoted and improved, and the purification and ecological restoration efficiency of the emergent aquatic plants for a water environment is improved by about 30%.

The present invention relates to the field of water environment treatment, and particularly discloses a method for restoring an ecological environment by utilizing emergent aquatic plants. According to the present invention, by arranging a magnetization reactor around the emergent aquatic plants to carry out intermittent magnetization induction on the emergent aquatic plants, the available quantity of plant root systems for mineralized substances in a micro-environment, such as inorganic phosphorus and the like, is increased, the limitation of maximum biomass is broken through, the oxygen conveying effect of the roots of the aquatic plants is promoted, and the hydraulic transmission effect is maintained and enhanced; and under the condition that the planting density of the plants is not increased, the pollutant absorption and conversion capacity of the emergent aquatic plants is promoted and improved, and the purification and ecological restoration efficiency of the emergent aquatic plants for a water environment is improved by about 30%.

The disclosure relates to the field of water environment treatment, and more particularly to a system and a method for restoring a water environment by a constructed wetland. The system for restoring the water environment by the constructed wetland includes: (1) a water distribution pipe for inputting a water body to be treated into the constructed wetland; (2) a magnetization reactor arranged around the water distribution pipe and used for applying a magnetic field perpendicular to the water flow direction to the water body flowing through the water distribution pipe in order to make the water body entering the constructed wetland through the water distribution pipe become magnetized water after magnetization treatment; (3) the constructed wetland; (4) a magnetization reactor arranged in the vertical direction of the constructed wetland and used for applying a magnetic field to the constructed wetland in the vertical direction; and (5) a water outlet pipe used for discharging the water body treated by the constructed wetland. The water body to be treated passes through the water distribution pipe, is treated by the magnetization reactor arranged around the water distribution pipe and then enters the constructed wetland. Meanwhile, the magnetization reactor arranged in the vertical direction of the constructed wetland is used for intermittently magnetizing the constructed wetland, so that the technical problems of high blocking possibility during operation and difficult rapid restoration of the constructed wetland can be effectively solved.

The disclosure relates to the field of water environment treatment, and more particularly to a system and a method for restoring a water environment by a constructed wetland. The system for restoring the water environment by the constructed wetland includes: (1) a water distribution pipe for inputting a water body to be treated into the constructed wetland; (2) a magnetization reactor arranged around the water distribution pipe and used for applying a magnetic field perpendicular to the water flow direction to the water body flowing through the water distribution pipe in order to make the water body entering the constructed wetland through the water distribution pipe become magnetized water after magnetization treatment; (3) the constructed wetland; (4) a magnetization reactor arranged in the vertical direction of the constructed wetland and used for applying a magnetic field to the constructed wetland in the vertical direction; and (5) a water outlet pipe used for discharging the water body treated by the constructed wetland. The water body to be treated passes through the water distribution pipe, is treated by the magnetization reactor arranged around the water distribution pipe and then enters the constructed wetland. Meanwhile, the magnetization reactor arranged in the vertical direction of the constructed wetland is used for intermittently magnetizing the constructed wetland, so that the technical problems of high blocking possibility during operation and difficult rapid restoration of the constructed wetland can be effectively solved.

Surface water, such as stormwater, is contained in a pond, or other containment having primary semi-isolated treatment areas constructed, or designated therein, which are suitable for establishing ecological communities for treatment of water within the containment. Water for treatment is induced to flow through the semi-isolated areas and the ecological communities therein for treating the water, such as by bio-filtering, breakdown and bioremediation of water-soluble or hydrocarbon-based contaminants and inhibition of the proliferation of waterborne pathogens. The treated water is then discharged from the semi-isolated areas, such as for use downstream. Discharge of the treated water from the primary semi-isolated treatment areas, as well as the use of pump systems, induces the flow of water through the semi-isolated areas and ecological communities therein to effect the treatment. Ecological communities may be established in relatively shallow secondary treatment areas in the containment and the recirculation of water therethrough may further act to treat the water in the containment.

A method of removing nitrogen-bound nitrate from at least one of groundwater, surface water, or waste water is disclosed. The method includes providing contaminant-containing water from groundwater, surface water, and/or waste water sources. The method further includes adding the contaminant-containing water to an algal photobioreactor system. The method further includes adding an alga culture to the alga photobioreactor system. The method further includes adjusting temperature, CO.sub.2 concentration, pH, light wavelength, and/or light intensity in the algal photobioreactor system to optimize the growth of the algae. The method further includes separating the algae from the water and harvesting algal biomass.

A stormwater filter includes a receptacle having an open top into which stormwater is permitted to enter the receptacle and flow downwardly therein. A hydroponic garden section having a media bed is supported within the receptacle and in an elevated condition above the bottom of the receptacle so that a water sump compartment is disposed between the hydroponic garden section and the bottom of the receptacle. In addition, a discharge opening is defined within a sidewall of the receptacle in the water sump compartment and adjacent the hydroponic garden section, and a post-filtration flow control orifice is associated with the discharge opening for controlling the filtration flow through the media bed. In addition, a wick is associated with the media bed for drawing water upwardly from the water sump compartment for use by plants growing within the media bed.

A vacuum airlift system for treating an aqueous effluent includes an upflow liquid portion, where the upflow liquid portion is configured to retain a fluid, and a fluid inlet, the fluid inlet being fluidly coupled with the upflow liquid portion, where the fluid inlet is positioned at about a bottom of the upflow liquid portion. The vacuum airlift system can also include a downflow liquid portion, where the downflow liquid portion is fluidly coupled with the upflow liquid portion, and a fluid outlet, the fluid outlet being fluidly coupled with the downflow liquid portion, where the fluid outlet is positioned at about a bottom of the downflow liquid portion. The vacuum airlift system can also include a photobioreactor fluidly coupled with the downflow liquid portion such that the fluid is configured to pass through the upflow liquid portion, into the downflow liquid portion, and into the photobioreactor.