Removing sediment from storage tanks without physically entering the tanks. More specifically, embodiments are directed towards inserting fluid into the storage tank via a liquid return line and injecting air into the storage tank via an air injection line to suspend sediment, draining and filtering the sediment, and returning the filtered fluid back into the tank via the liquid return line.

A system for separating solids from a fluid includes a containment vessel having a V-shaped tank in fluid communication with an agitated overflow tank. Baffles within the V-shaped tank provide a series of zones where the fluid is deposited for processing. A shaftless auger at the bottom of the V-shaped tank transfers solids to an area where they are pumped to a first hydrocyclone assembly associated with a first shaker. Overflow from the hydrocyclone assembly and underflow from the first shaker is further processed by a second hydrocyclone assembly associated with a second shaker. Overflow from the second hydrocyclone assembly and underflow from the second shaker are deposited into overflow tank which contains the cleaned fluid.

The present disclosure relates to a system and process for separating sand and gravel in sediments of a sewage pipe network and recycling organic matters. The system includes a conveying grid plate, a mud outlet is provided below the conveying grid plate, and a masonry conveying area is provided at one side of the conveying grid plate; a fiber crushing tank, disposed below the mud outlet, and a crushing device is disposed below the mud outlet; a masonry scouring and recycling tank, provided with an interception grille located at one side of the masonry conveying area, a flushing device is disposed above the interception grille, a masonry outlet is provided in the masonry scouring and recycling tank, the masonry scouring and recycling tank is communicated with a muddy water return pipe, and the muddy water return pipe is communicated with the mud outlet.

The invention relates to preventing microplastics from the entering the environment. In particular the invention is directed to filtering microfibers from the waste water from washing machines as well as waste from other appliances and other sources of effluent with entrained microplastics or other microp-ollutants. A separator is provided for separating microplastics from effluent comprising; a chamber including at least one sieve structure, a shroud that acts as a vortex finder and a baffle coaxial with the shroud and projecting upwards from the lower end of the chamber, wherein the shroud has a circular lower rim and the baffle has a circular upper rim, wherein the radius of the lower rim of the shroud is greater than the radius of the upper rim of the baffle.

A method and a process arrangement for improving a solid-liquid separation of solids from a hydrolyzed material formed in an enzymatic hydrolysis of lignocellulosic material, comprising following step: i) adding a flocculant additive to the hydrolyzed material or to a stream separated from the hydrolyzed material to form a mixture, and ii) separating a solid stream and a liquid stream from the mixture by means of a decantation or gravitational separation. Further is disclosed a solid product.

A method and a process arrangement for improving a solid-liquid separation of solids from a hydrolyzed material formed in an enzymatic hydrolysis of lignocellulosic material, comprising following step: i) adding a flocculant additive to the hydrolyzed material or to a stream separated from the hydrolyzed material to form a mixture, and ii) separating a solid stream and a liquid stream from the mixture by means of a decantation or gravitational separation. Further is disclosed a solid product.

A prismatic reflector is provided for incorporation into a centrifugal separation chamber. The prismatic reflector is formed of a light-transmissive material and includes inner and outer walls and first and second end walls. The inner wall is configured to receive light traveling along an initial path and transmit the light to the first end wall, with the first end wall receiving the light transmitted through the inner wall and directing the light toward the second end wall in a direction that is angled with respect to the initial path. The second end wall receives the light from the first end wall and transmits the light out of the prismatic reflector. The initial path of the light may be in a direction toward a rotational axis of the centrifugal separation chamber, with the prismatic reflector redirecting the light into a direction substantially parallel to the rotational axis.

The present disclosure discloses a method for impurity removal and treatment in the recycling process of scrap positive electrode materials of lithium batteries. The method includes controlling a flow rate of a leachate of scrap positive electrode materials of lithium batteries and a first alkaline solution at a first temperature higher than the room temperature and a constant first pH value to remove, by precipitation, iron ions, aluminum ions and at least part of copper ions to obtain a first filtrate; controlling the flow rate of the first filtrate, a complexing agent and a second alkaline solution at a second temperature higher than the room temperature and within a constant first pH range to obtain a target substance precipitate by separating a second filtrate containing lithium ions from the first filtrate; dissolving the target substance precipitate to obtain a first solution; and controlling the flow rate of the first solution and a fluorine-containing precipitant at a third temperature high than the room temperature and a constant concentration of fluorinion to remove, by precipitation, calcium ions, magnesium ions and at least part of lead ions to obtain a target solution. By the method of the present disclosure, a precipitate with a large particle size, high crystallinity and low water content can be obtained, which facilitates washing and improves the recycling rate of nickel-cobalt-manganese from the scrap positive electrode materials of lithium batteries.

The present disclosure discloses a method for impurity removal and treatment in the recycling process of scrap positive electrode materials of lithium batteries. The method includes controlling a flow rate of a leachate of scrap positive electrode materials of lithium batteries and a first alkaline solution at a first temperature higher than the room temperature and a constant first pH value to remove, by precipitation, iron ions, aluminum ions and at least part of copper ions to obtain a first filtrate; controlling the flow rate of the first filtrate, a complexing agent and a second alkaline solution at a second temperature higher than the room temperature and within a constant first pH range to obtain a target substance precipitate by separating a second filtrate containing lithium ions from the first filtrate; dissolving the target substance precipitate to obtain a first solution; and controlling the flow rate of the first solution and a fluorine-containing precipitant at a third temperature high than the room temperature and a constant concentration of fluorinion to remove, by precipitation, calcium ions, magnesium ions and at least part of lead ions to obtain a target solution. By the method of the present disclosure, a precipitate with a large particle size, high crystallinity and low water content can be obtained, which facilitates washing and improves the recycling rate of nickel-cobalt-manganese from the scrap positive electrode materials of lithium batteries.

According to various aspects and embodiments, a system and method for two-stage filtration is provided. The system includes an inlet fluidly connectable with wastewater, a first stage filter assembly that is fluidly connectable with the inlet and has a rotary drum with a filter surface configured for radially inward fluid flow, a second stage filter assembly that is fluidly connectable with the first stage filter and has a plurality of filter discs configured for radially outward fluid flow, and an outlet fluidly connectable with filtrate generated by the second stage disc filter assembly.