The system for a continuous dewatering recirculating for removing particulate such as coal combustion residue from a water stream. The system includes multiple dewatering and recirculation containers, each having a submerged flight conveyor and lamella settlings plate located therein, at least one dewatering and recirculation container receives ash water stream overflow.

A method and apparatus is provided for water filtration of a milk of lime solution that contains water, impurities, and grit particles, in which the milk of lime solution enters a vessel, and wherein turbulence is created in the vessel, by which larger grit particles settle out of the milk of lime solution, to form a bed of grit particles in the lower end of the vessel, such that grit particles and impurities are filtered from the lime-treated water that comprises a milk of lime solution, with water then being drawn off, that may be discharged out one or more dosing locations and/or recycled back for further filtration, as may be desired.

A system for treating liquids and solutions for separating components thereof, the system including a treatment vessel having a treatment chamber therein, a device for generating a gas-infused liquid under elevated pressure, and a device for stabilizing the gas-infused liquid such that most of the gas infused into the liquid by the device for generating a gas-infused liquid will remain in the liquid if pressure of the liquid is reduced to atmospheric pressure, and for flowing the stabilized gas-infused liquid into the treatment chamber so as to form a liquid layer including the stabilized, gas-infused liquid in the treatment chamber. The treatment vessel includes a discharge port through which some of the stabilized, gas-infused liquid in the liquid layer may be discharged from the treatment vessel, the withdrawn liquid is infused with an additional amount of the gas, again stabilized, and again flown the liquid into the treatment chamber.

A method and apparatus is provided for water filtration of a milk of lime solution that contains water, impurities, and grit particles, in which the milk of lime solution enters a vessel, and wherein turbulence is created in the vessel, by which larger grit particles settle out of the milk of lime solution, to form a bed of grit particles in the lower end of the vessel, such that grit particles and impurities are filtered from the lime-treated water that comprises a milk of lime solution, with water then being drawn off, that may be discharged out one or more dosing locations and/or recycled back for further filtration, as may be desired.

One or two continuous recirculation loops are utilized for the well-site equipment that separates produced fluids into sand, liquid, and gas during drill out and flow back that occurs after fracturing a subterranean formation. When one recirculation loop is utilized, the recirculation loop continuously recirculates fluid between the recirculation chamber of the disclosed sand removal apparatus and a shaker device. When two recirculation loops are utilized, the first recirculation loop continuously recirculates fluid between a recirculation chamber of the disclosed sand removal apparatus and a shaker device, and the second recirculation loop continuously recirculates fluid between the recirculation chamber and a gas separator.

The present invention relates to systems and methods for desalinating and/or treating polluted water. More particularly, the present invention relates to systems and methods for desalinating and/or treating polluted water using gas hydrates. In particular, the system comprises a desalination tank configured to form gas hydrates using a suitable hydrate former taken from a storage tank that is operatively connected to the desalination tank. With all operations, including formation of gas hydrates, discharging of highly saline water, washing the gas hydrates and dissociation of gas hydrates being conducted in a single pressurized tank such as the desalination tank, the present apparatus provides a simple and efficient solution at a low manufacturing and operating cost.

The present invention is directed to improved systems and processes for clarifying a thin stillage stream in a biofuel production process, such as a dry grind alcohol production process, that removes desirable amounts of insoluble solids from at least a portion of the thin stillage stream, thereby realizing any number of process enhancements.

The system for a continuous dewatering recirculating for removing particulate such as coal combustion residue from a water stream. The system includes multiple dewatering and recirculation containers, each having a submerged flight conveyor and lamella settlings plate located therein, at least one dewatering and recirculation container receives ash water stream overflow.

A system for removing contaminants from a pyrolysis fluid is provided. The system comprises a recirculation loop; and a bleed off line. The recirculation loop comprises a quenching vessel; separation apparatus; a recirculation line; and cooling apparatus. The quenching vessel has: a first inlet for receiving a supply of pyrolysis fluid; a second inlet arranged to receive a recirculated fluid; and an outlet for expelling quenched pyrolysis fluid. The separation apparatus is for removing contaminants from the quenched pyrolysis fluid to provide a clarified flow, the separation apparatus arranged to receive quenched pyrolysis fluid from the outlet. The recirculation line is arranged to receive at least a recirculation portion of the clarified flow and recirculate the recirculation portion to the second inlet. The cooling apparatus is arranged to cool fluid in the recirculation loop. The bleed-off line is for selectively bleeding-off a bleed-off portion of the clarified flow from the recirculation loop.

An aim of the invention is to provide a bioreactor and a waste water treatment method that employs this tank, whereby anaerobic and aerobic microorganism treatment can be continuously carried out, even when the volume of the bioreactor is large, and whereby installation costs can be minimized. The invention comprises an outer tank (2), a cylindrical inner tank (3) disposed inside this outer tank and having openings above and below, a circulation rate control device (4) for controlling the circulation rate of water to be treated in the bioreactor, the circulation rate control device (4) being provided at an upper part of this cylindrical inner tank, a cylindrical control plate (5) for bringing about sedimentation of sludge, the cylindrical control plate (5) being provided at the outer circumference of an upper part of the cylindrical inner tank, a treated-water quality measurement device (6) that is provided outside and inside of the cylindrical inner tank, a waste water supply opening (10) that is provided in the circulation pathway of the water to be treated circulating through the outer tank and inner tank, a treated water discharge opening (11) that is provided in an upper part of the outer tank.