A solid-liquid separator including a hollow structure. The hollow structure may include a separator portion having a solid-liquid-mixture inlet and a curved-funnel-shaped inner separator surface. The hollow structure may further include a collector portion having a frustoconically-shaped inner liquid guide surface. The separator portion and the collector portion may be disposed such that a spout of the curved-funnel-shaped inner separator surface and a narrower end of the frustoconically-shaped inner liquid guide surface may be directed towards each other.

An automated waste water treatment system includes a collection tank constructed to hold waste water, a first flow line connected to the collection tank to output the waste water from the collection tank, an electrocoagulation unit that receives the waste water and outputs the waste water as coagulated waste water to a flow line, a polymer dosage tank to provide a polymer dosage into the flow line where the polymer dosage mixes with the coagulated waste water to produce and output flocculated waste water. A clarifier connected to the flow line receives the flocculated waste water and produces sludge-free waste water and concentrated sludge, a series of filters to output filter-treated water, and an ultrafiltration system that receives filter-treated water and outputs ultrafiltration-treated water to a reverse osmosis system.

A frac sand separator system includes a sand separator having an inlet fluidly connected to a well for receiving a fracking return mixture from the well. The sand separator is configured to separate water of the fracking return mixture from particulate matter of the fracking return mixture. The sand separator includes an outlet. The frac sand separator system includes a collection container fluidly connected to the outlet of the sand separator for receiving the particulate matter from the sand separator. At least one outlet valve is fluidly connected between the outlet of the sand separator and the collection container. The frac sand separator system includes a computing device operatively connected to the at least one outlet valve. The computing device includes a processor configured to automatically open the at least one outlet valve such that the particulate matter is released from the sand separator into the collection container.

This disclosure describes systems, methods, and apparatus for counter-current solids leaching. A multi-stage countercurrent leaching chamber can include a top and bottom end, a barren liquor input, two or more regions for countercurrent mixing, and a barren solids output. The input can be configured to receive barren liquor. The two or more regions for countercurrent mixing and separation can be configured to mix and separate liquid and solid phases. The barren solids output can be configured to collect and discharge barren solids from the bottom end of the multi-stage countercurrent leaching chamber. A fluidized bed chamber and clarifier chamber can also be included, where the fluidized bed receives a fluidizable slurry of pregnant solids and the clarifier chamber aids in separating liquids from solids passing from a top of the fluidized bed chamber to the top end of the multi-stage countercurrent leaching chamber.

A system for automatically discharging sand from a sand separator. The system includes a first and second valves and a choke valve disposed in a discharge line from a sand separator. A pressure transducer measures pressure in the line between the first and second valves. A controller operates the valves to initiate and terminate the discharge sequence. An emergency shutdown valve is positioned upstream of the sand separator and is operative to shut down the system if the pressure reading by the transducer exceeds a predetermined amount.

A method and apparatus for the separation of gas and liquid-solid slurry under pressure, and passage of the liquid-solid slurry to an atmospheric discharge.

A portable lamella settling tank is configured for use as a sediment trap. The tank includes a transportable housing having a settling tank portion; a fluid inlet within the housing; a fluid treatment station downstream of the inlet configured for fluid treatment additives to be introduced to incoming fluid; agitation piping downstream of the fluid treatment station configured to mix the fluid treatment additives and the incoming fluid; mixing wells downstream of the agitation piping and each having an outlet extending into the settling tank portion; a lamella separator having a spillway located within the center of the lamella separator above the height of the mixing well outlets, wherein the lamella separator is configured for operation with the housing up to at least 5% out of level in roll and pitch orientations; a fluid outlet coupled to the spillway; and a sludge takeout for removal of sludge.

Sand separation systems and methods according to which one or more energy sensors are adapted to detect a response to energy imparted to a sand separator of a known type. One or more computers are adapted to communicate with the one or more energy sensors. The one or more computers and/or the one or more energy sensors are pre-tuned. The one or more computers are configured to determine the unknown sand level in the sand separator of the known type based on: the response detected by the one or more energy sensors, and the pre-tuning of the one or more energy sensors and/or the one or more computers.

A solid-liquid separator including a hollow structure. The hollow structure may include a separator portion having a solid-liquid-mixture inlet and a curved-funnel-shaped inner separator surface. The hollow structure may further include a collector portion having a frustoconically-shaped inner liquid guide surface. The separator portion and the collector portion may be disposed such that a spout of the curved-funnel-shaped inner separator surface and a narrower end of the frustoconically-shaped inner liquid guide surface may be directed towards each other.

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.