A system and method for foam fractionation with gas recycling is disclosed herein. The method includes using foam fractionation to remove a contaminant from an aqueous source. The method includes providing a feed stream to an inlet of an active column; introducing the feed stream into an interior of the active column; flowing gas through an active column into the interior of the active column; rising gas through the feed stream in the interior of the active column to form gas bubbles in the feed stream; forming a foam layer; extracting the foam layer; passing the foam layer through a liquid-gas separator to obtain a recycle gas stream; feeding the recycle gas stream to a recycling device; and re-introducing the recycle gas stream to the active column using the recycling device.

A waste processing system includes: an input module for converting input organic waste into processed input waste; a digester module, coupled to the input module, for generating biogas and digester effluent from the processed input waste, including: a digester tank; baffles affixed within the digester tank; a digester process solution in the digester tank including, hydrolytic bacteria, acidogenic bacteria, acetogenic bacteria, methanogenic bacteria, or a combination thereof, for converting the processed input waste into the biogas and the digester effluent; and an output module, coupled to the digester module, for collecting the biogas and digester effluent after a residence period.

Provided is an agent for treating water circulating through a wet paint booth, the agent being capable of reducing the adhesion of a solvent-based paint and coagulating a solvent-based paint to a sufficient degree regardless of the type of the paint, the type of the curing agent used, or the facility conditions, the agent also being capable of markedly reducing the foaming of a water-based paint, even when being used in a small amount. An agent for treating water circulating through a wet paint booth includes a phenolic resin having a weight-average molecular weight of more than 3,000 and 100,000 or less, the phenolic resin serving as an active component. A method for treating circulating water circulating through a wet paint booth includes coagulating a water-based paint and/or a solvent-based paint included in the circulating water by adding the agent to the circulating water.

A method of subsiding foam resulting from an industrial process and moving it in a predetermined direction on the surface of an industrial-process liquid includes establishing a foam-displacement direction and a foam-displacement path. At least two fluid-spray sources from which a foam-subsiding fluid can be ejected are arranged serially above the industrial-process liquid and foam accumulating thereon. The fluid-spray sources are oriented and caused to eject foam-subsiding fluid such that foam impacted by foam-subsiding fluid ejected from the first fluid-spray source is wetted, partially subsided and displaced in the foam-displacement direction toward the spray being ejected from the second fluid-spray source by which the foam is further wetted, subsided and displaced in the foam displacement direction. In implementations including three or more fluid-spray sources, foam is moved sequentially through the sprays of the fluid-spray sources such that it is increasingly subsided as it moves through the foam-displacement path.

The invention relates to a process for the selective precipitation of at least one conjugate base and/or at least one metal cation from an acidic preparation by neutralization as well as the use of an aqueous slurry of at least one calcium carbonate source for the selective precipitation of at least one conjugate base and/or at least one metal cation from an acidic preparation by neutralization.

A waste processing system includes: an input module for converting input organic waste into processed input waste; a digester module, coupled to the input module, for generating biogas and digester effluent from the processed input waste, including: a digester tank; baffles affixed within the digester tank; a digester process solution in the digester tank including, hydrolytic bacteria, acidogenic bacteria, acetogenic bacteria, methanogenic bacteria, or a combination thereof, for converting the processed input waste into the biogas and the digester effluent; and an output module, coupled to the digester module, for collecting the biogas and digester effluent after a residence period.

The present disclosure relates to fluid treatment. In particular, examples of the present disclosure relate to devices, systems and methods for fluid treatment combining electrochemical oxidation treatment and sonication treatment of fluids.

A surface foam diffuser and digester tank system prevents and/or suppresses the formation of foam during digestion. The system includes a first nozzle disposed above a top surface of the at least partially liquid contents, a splash plate positioned adjacent to the first nozzle outlet, and a second nozzle disposed below the top surface of the at least partially liquid contents for suppressing foaming in the large processing tanks. The system nozzles each have an inlet for receiving pressurized liquid and an outlet for ejecting a liquid stream into the tank, the depth of the second nozzle and the direction of the liquid stream there from being such that rotation of the top surface is facilitated. The spray of the first nozzle, as dispersed by the splash plate, reduces foam on at least a portion of the top surface, with the rotation of the top surface bringing each portion of the top surface to eventually fall within the reducing spray.

The subject invention provides safe, environmentally-friendly compositions and efficient methods for defoaming or inhibiting foam production. More specifically, the subject invention provides compositions derived from microorganisms for defoaming or inhibiting foam production, which can be used for increasing the efficiency of processing mined materials.

Described herein are methods for transporting and/or harvesting gas from bubbles, as well as associated articles and systems. In some embodiments, transporting and/or harvesting the gas from the bubbles can reduce or prevent the amount of foam that is present within a system. According to certain embodiments, a conduit comprising a porous wall portion can be at least partially submerged into a foam and/or a bubble-containing liquid. The porous wall portion of the conduit can be configured and/or arranged, according to certain embodiments, such that the porous wall portion provides a fluidic pathway through which gas from the bubbles within the liquid may be channeled to a gaseous environment in the interior portion of the conduit. The gas may be transported, according to certain embodiments, along the interior portion of the conduit into an external gaseous environment and/or harvested from the interior portion of the conduit.