Devices for controlling to remove food waste digestion foam are provided. The device includes a digestion tank. The digestion tank includes two hermetically sealed boxes. Each of the two boxes is opened with a liquid inlet connected to an interior of each of the two boxes. A conveying mechanism is connected between the two boxes. The conveying mechanism conveys a gas in the two boxes in a reciprocal manner. The gas in the two boxes is conveyed in the reciprocal manner through the conveying mechanism to generate a pressure difference between the two boxes distributed left and right to remove the foam, which adopts physical defoaming without adding any reagent, is cost-effective and efficient, and does not affect an anaerobic reaction process due to addition of a chemical defoaming agent. The entire device has a simple structure and is easy to operate, and the process is controllable.

A process of removing contaminants and concentrating wastewater includes delivering wastewater from a source of wastewater to a hydrogen sulfide removal device, mixing an oxidant with the filtered wastewater in the hydrogen sulfide removal device to produce a hydrogen sulfide lean effluent, delivering the hydrogen sulfide lean effluent to a direct contact concentrator. and evaporating a portion of the hydrogen lean effluent in the direct contact evaporator to produce a slurry and an exhaust gas.

A wastewater evaporation system for spray evaporating water comprising: a wastewater feed inlet; a pump, wherein an outlet of the wastewater inlet is fluidly connected to an inlet of the pump and wherein an outlet of the pump is fluidly connected to an inlet of a manifold; a drip orifice, wherein an outlet of the manifold is fluidly connected to an inlet of the drip orifice; a container, wherein an upper portion of the container is enclosed with a demister element; a packing system and/or a tray system disposed within the container, wherein the outlet of the drip orifice discharges water droplets onto the packing system and/or the tray system; a discharge outlet, wherein a bottom of the container is fluidly connected to the discharge outlet; and an air system comprising an air blower and optionally an air preheater, wherein the air system is disposed through a wall of the container and wherein the air system discharges air flow counter to the water droplets from the drip orifice. A method of spray evaporating water while limiting emission of particles regulated as pollutants is also disclosed.

The invention relates to a method for treating organically contaminated wastewater and/or organically contaminated wet waste, in particular for treating sanitary wastewater (15) in trains. According to the invention, the method comprises the following steps: a) purifying the organically contaminated wastewater and/or the organically contaminated wet waste, in particular the sanitary wastewater (15) in trains, in a bioreactor (20), b) feeding the wastewater (24) at least partially purified in the bioreactor (20) into a conditioning plant (30), c) at least partial phase separation of the partially purified wastewater (24) in the conditioning plant (30), d) obtaining a liquid portion and a solid portion of the at least partially purified wastewater (24).

We provide methods, systems, and apparatus for treatment of high chemical oxygen demand wastewater using anaerobic treatment with ceramic membranes. We also provide post-treatment using microbial fuel cells.

Formulation F comprising A) 50 to 90 parts by weight of at least one block copolymer P of ethyleneoxide and propylene oxide, B) 0.5 to 10 parts by weight of at least one salt of an alkyl sulfate S, C) 0.05 to 0.5 parts by weight of a composition C comprising C1) 5 to 10 parts by weight of at least one polydimethylsiloxane bearing only terminal alkyl groups, C2) 1 to 3 parts by weight of at least one polydimethylsiloxane bearing at least alkoxylated hydroxy group, C3) at least one solvent,
wherein said formulation F is an aqueous formulation.

A composition and method for reducing odors and cleaning packing media and other components in a wet air scrubber using nonionic surfactants, amphoteric surfactants, and a source of humic acid. Preferred nonionic surfactants include regular and low foam nonionic surfactants. The source of humic acid is preferably organic peat humus. The treatment composition is added to water in the wet scrubber at a concentration of 50-1000 ppm. The treatment composition is a premixed composition in a single container, making it unnecessary to separately add ingredients to the water. The treatment composition is effective at reducing odors by at least 50% compared to no treatment. The treatment composition is also effective at significantly reducing foam levels, making it unnecessary to add a separate defoamer to the water being treated. The treatment composition does not need to use defoamers, enzymes, oxidizers, chlorine compounds, or strong acids to be effective.

A process for continuously treating a stream of water (for example, a stream of oil and gas well wastewater) to remove contaminants therefrom is provided. The process comprises: a) testing the stream of water to determine if it contains biological matter and, if necessary, removing biological matter from the stream; b) testing the pH level of the stream and, if necessary, adjusting the pH level of the stream; c) separating the stream of water into a sludge discharge stream and a separator unit effluent stream; d) separating the separator unit effluent stream into a steam discharge stream and a concentrated brine stream; and e) separating the concentrated brine stream into a chlorine gas stream and at least one of a sodium stream and a calcium stream. A corresponding system is also provided.

The present invention relates to apparatus, methods, and applications for treating wastewater, and more particularly to biological processes for removing pollutants from wastewater. This invention further relates to apparatus and methods for growing microbes on-site at a wastewater treatment facility, and for economically inoculating sufficient microbes to solve various treatment problems rapidly.

Methods and systems for use of switchable water, which is capable of reversibly switching between an initial ionic strength and an increased ionic strength, is described. The disclosed methods and systems can be used, for example, in distillation-free removal of water from solvents, solutes, or solutions, desalination, clay settling, viscosity switching, etc. Switching from lower to higher ionic strength is readily achieved using low energy methods such as bubbling with C0.sub.2, CS.sub.2 or COS or treatment with Bronsted acids. Switching from higher to lower ionic strength is readily achieved using low energy methods such as bubbling with air, inert gas, heating, agitating, introducing a vacuum or partial vacuum, or any combination or thereof.