The present invention relates to the field of water environment treatment, and particularly discloses a system and method for restoring a river and lake water body by a floating type water purification plant. The method comprises: (1) under the action of a water pump, enabling the river and lake water body to pass through a grille to be filtered; (2) lifting the filtered water body to an ss sedimentation tank by the water pump through a water inlet pipe, and carrying out pre-magnetization on the water body in the water inlet pipe by a pre-magnetization device arranged in the water inlet pipe; (3) enabling the water body subjected to pre-magnetization treatment to enter the ss sedimentation tank so as to remove particles in the water body; (4) enabling the water body treated by the ss sedimentation tank to enter a magnetizer to be subjected to magnetization treatment under a magnetic field intensity of 50 mT to 2,000 mT; and (5) distributing the water body subjected to magnetization treatment at the upper part of the floating type purification plant. According to the present invention, for the river and lake water body, for different growth periods of aquatic plants, the magnetic field intensity of the magnetizer for carrying out magnetization treatment on the water body is regulated for inducing growth of plants and beneficial indigenous microorganism communities, so that the purifying capacity and reliability of an ecological floating bed technology are reinforced.

A method of using algae to remove a contaminant or pollutant from a first fluid is provided. The method can include providing a growing apparatus having a first reservoir containing the first fluid and a second reservoir containing a second fluid, and growing the algae using the growing apparatus. The method can further include exposing the algae to the first fluid within the first reservoir where the algae uptakes the contaminant or pollutant from the first fluid, and exposing the algae via a belt to the second fluid in the second reservoir where the algae is stimulated to release the contaminant or pollutant. Exposing the algae to the first fluid within the first reservoir or the second fluid may change a growth rate of the algae.

A method for predicting a discharge level of an effluent from decentralized sewage treatment facilities, the method including: measuring the conductivity of an influent, the conductivity and suspended solids concentration of an effluent of a plurality of decentralized sewage treatment facilities; repeatedly measuring a pH, a concentration of COD, a concentration of ammonia nitrogen, the concentration of total phosphorus of the effluent of each of the plurality of decentralized sewage treatment facilities; calculating average values of the pH, the concentration of COD, the concentration of ammonia nitrogen, the concentration of total phosphorus; comparing the average values with a local sewage discharge standard, and determining a discharge level of the effluent; constructing a predictive model; and sampling an influent and an effluent of a sewage treatment facility, measuring the conductivity of an influent, the conductivity and suspended solids concentration of the effluent, inputting the obtained data to the predictive model.

A biological filler includes an embedding agent and an embedded complex. The embedded complex includes a scallop shell powder, 1,5-dihydroxyanthraquinone, and Thiobacillus denitrificans. The embedding agent includes a poly(vinyl alcohol)-sodium alginate blend membrane and a crosslinked composite membrane. The embedded complex is embedded by the embedded agent.

Disclosed a device for preventing and controlling pollutants in the reuse of reclaimed water in agricultural activity areas with extreme water shortage, including A.sup.2/O tank (1), nano-aeration tank (2) and quick soil infiltration device (3) connected in sequence. A.sup.2/O tank (1) is fed with wastewater to be treated, which is treated sequentially in anaerobic, anoxic and aerobic environment, thereafter the supernatant is transported into nano-aeration tank (2). The supernatant treated by nano-aeration tank (2) is transported into quick soil infiltration device (3), and is allowed to flow through one or more layers of fillers laid in quick soil infiltration device (3) to degrade or remove pollutants.

A rural landscape-type nitrogen and phosphorus ecological interception ditch system and a farmland drainage nitrogen and phosphorus interception method using the system are provided. The system includes a sediment buffer zone, an ecological ditch unit, an interception-conversion pool and a field ridge hedge fence; the sediment buffer zone, the ecological ditch unit, and the interception-conversion pool are sequentially arranged in a continuous ditch along a direction of a water flow; and the field ridge hedge fence is arranged on field ridges on one side or both sides of the ditch. The present disclosure can, on the basis of not affecting normal production functions of a farmland, further exert an ecological role of the farmland, and use the farmland as an assimilation sink for environmental nitrogen and phosphorus, so as to optimize drainage water quality and improve a farmland ecological environment.

The inventive concepts herein allow several seemingly intractable environmental problems (toxic algae blooms, water pollution, petroleum-based plastics pollution, water contamination, premature retirement of zero-carbon nuclear power plants, etc.) to be solved economically and in a commercially practical way by integrating recovered heat, to grow or sustain organisms, that provide services (e.g. water purification, water pollution remediation, industrial recycling, contaminant degradation, load following) and/or products (e.g. biomaterials, hydrogen).

The inventive concepts herein allow several seemingly intractable environmental problems (toxic algae blooms, water pollution, petroleum-based plastics pollution, water contamination, premature retirement of zero-carbon nuclear power plants, etc.) to be solved economically and in a commercially practical way by integrating recovered heat, to grow or sustain organisms, that provide services (e.g. water purification, water pollution remediation, industrial recycling, contaminant degradation, load following) and/or products (e.g. biomaterials, hydrogen).

A method of using algae to remove a contaminant or pollutant from a first fluid is provided. The method can include providing a growing apparatus having a first reservoir containing the first fluid and a second reservoir containing a second fluid, and growing the algae using the growing apparatus. The method can further include exposing the algae to the first fluid within the first reservoir where the algae uptakes the contaminant or pollutant from the first fluid, and exposing the algae via a belt to the second fluid in the second reservoir where the algae is stimulated to release the contaminant or pollutant.

Culture systems and methods of using same. The systems include a housing defining an inner space. The inner space includes a headspace and at least a portion of a reservoir. A surface for immobilizing cells is moveable between the headspace and the reservoir. The systems can be used for coculturing methanotrophs and phototrophs for processing biogas and wastewater, particularly from anaerobic digesters.