The present invention belongs to the technical field of environmental engineering and provides a method for constructing a multistage food chain biofilm system enhanced by electrochemistry and an application in pharmaceutical wastewater. A flow-through electrochemical degradation module is constructed based on P/F-TiO.sub.2-n porous membrane electrodes, and a multistage flow-through composite electrochemical-biological submerged fixed film reactor is constructed jointly with the PA-N-rGO fixed fiber carrier and applied to deep purification of high-risk substances in pharmaceutical wastewater. The flow-through electrochemical degradation module can also effectively degrade antibiotics resistance genes and refractory organics in the water, improve the biodegradability of the wastewater and improve the degradation performance and load of shock resistance of the system, so the multistage flow-through composite electrochemical-biological submerged fixed film reactor can realize the high-efficiency low-consumption treatment of pharmaceutical wastewater and effectively reduce the yield of excess activated sludge.

Methods for clarifying water, reducing turbidity of water, and removing phosphate from water include adding a water treatment composition having an aluminum-containing coagulant, and a natural non-charged polysaccharide, such as guar. The aluminum-containing compound can include polyaluminum chloride, aluminum chlorohydrate, polyaluminum chlorohydrate, aluminum sulfate, sodium aluminate, polyaluminum sulfate, polyaluminum silicate chloride, polyaluminum silicate sulfate, or a combination thereof.

A high salinity wastewater treatment system is provided according to the present application, which includes a hydrogel loading system and a flow-storage different-oriented-inlet-and-outlet system. The hydrogel loading system includes six separation plates, a wastewater treatment area, a water distribution bin, a rotating shaft, a driving motor and a fixed bracket. The six separation plates evenly separate the wastewater treatment area into six separate treatment sectors in an axial direction. The six separate treatment sectors are filled with hydrogel materials with water purification effect. The high salinity wastewater infiltrates into each separate treatment sector one by one through high salinity wastewater inlet meshes on a surface of the wastewater treatment area, and the purified high salinity wastewater is discharged through a wastewater cleaning outlet pipe with a same water inlet direction as a cleaning filler distribution pipe.

The present disclosure provides a method, a system for dehydrating a gasification fine slag, and a medium thereof. The method is performed by a processor controlling a dehydration device or a detection device, and the detection device is configured to detect at least one of physical properties or chemical properties of a gasification fine slag to be dehydrated. The method includes controlling the detection device to determine characteristic parameters of the gasification fine slag to be dehydrated, and determining a judgmental characteristic index of a dehydration moder of the gasification fine slag to be dehydrated. The method includes determining a target dehydration device and controlling the target dehydration device to dehydrate the gasification fine slag to be dehydrated. The method further includes controlling the detection device to determine a residual moisture content of a dehydrated gasification fine slag, and determining whether to end a dehydration task.

A nitrate-reducing electrode, and methods of making the nitrate-reducing electrode are disclosed. The nitrate reducing electrode includes catalyst particulates disposed on water permeable substrates with the use of electrodeposition, electroless deposition, electrospinning, or thermal treatment. The catalyst particles include metals and metal oxides. The water permeable substrates are preferably made of carbonaceous materials using electrospinning and thermal treatment.

A method of removing chemical contaminants from a composition comprising an active, a solvent, and a contaminant can include providing an initial feed supply, wherein the initial feed supply comprises the active, the solvent, and the contaminant, wherein the contaminant can include 1,4 dioxane, dimethyl dioxane, or a combination thereof; including filtering the initial feed stock through a nanofilter.

The present disclosure provides a method of processing a liquid containing ammonia nitrogen from a first semiconductor fabrication machine. The method includes: adsorbing a plurality of ammonium (NH.sub.4.sup.+) ions in the liquid; desorbing the plurality of NH.sub.4.sup.+ ions to a solution; converting a fraction of the plurality of NH.sub.4.sup.+ ions into a plurality of ammonia (NH.sub.3) molecules; and electrolyzing the plurality of NH.sub.3 molecules to become a plurality of hydrogen (H.sub.2) molecules and a plurality of nitrogen (N.sub.2) molecules.

The application relates to a fluidized adsorption device and a fluidized adsorption method for sewage treatment. The fluidized adsorption device comprises a fluidized adsorption column and a reflux device, wherein the fluidized adsorption column is consisted of a water outlet area, a fluidized adsorption area and a water inlet area from top to bottom; the reflux device includes top, middle and bottom reflux ports, and related reflux tubes; and the top reflux port and the bottom reflux port are activated during adsorption, and the middle reflux port and the bottom reflux port are activated during adsorbent replacement, such that the fluidized adsorption column can run continuously.

The present invention relates to a process for the purification of an aqueous hydrogen peroxide solution, comprising at least one treatment on a reverse osmosis membrane and at least one electrodeionization treatment. The invention also relates to a process for the preparation of an aqueous hydrogen peroxide solution, comprising at least one stage of synthesis of an aqueous hydrogen peroxide solution, at least one treatment on a reverse osmosis membrane and at least one electrodeionization treatment of said solution. The invention also relates to an aqueous hydrogen peroxide solution capable of being obtained by the purification process or the preparation process, as are defined above.

A filtration membrane including a first layer having a triamine-functionalized polysilicate mesoporous material, a second layer including a polysulfone; and a third layer including a polyester terephthalate is described. An orthosilicate group of the triamine-functionalized polysilicate mesoporous material is bonded to a silicon atom of a silicon-containing triamine to form a triamine-functionalized polysilicate backbone, wherein the silicon-containing triamine and one or more tetramines are covalently crosslinked with terephthaloyl chloride to form a polyamide, and wherein the triamine-functionalized polysilicate mesoporous material has a hierarchical structure of MCM-41. The membrane is adapted for use selected from the use group consisting of oil and water separation, water treatment, desalination, and pharmaceutical filtration.