A method for the treatment of municipal wastewater by an activated sludge process that uses an overflow weir to extract waste flows from the surface of aeration basins, which is especially useful for continuous-flow treatment systems. A downward opening overflow weir is precisely controlled to remove a surface wasting flow from the aeration basin with the weir automatically moved up and down to accurately and precisely maintain a desired depth of flow over the weir, preferably with a microprocessor-based controller executing a control algorithm based on variable inputs to provides for accurate and precise control of the depth of surface wasting flow over the weir, without excessive oscillation of the overflow weir’s movement and the resultant excessive oscillation in the depth of flow over the weir.

For storing supercooled water, a method cools a water flow with a specified mass flow rate to a specified temperature to form a supercooled water flow. The method conducts the supercooled water flow through a flow pipe with a specified pipe impedance to an ice tank. The method stores the supercooled water flow as ice in the ice tank.

An air infiltration system for a hydroelectric plant includes a spillway gate and a linearized cone valve coupled to the spillway gate, the linearized cone valve having a pivotable plate assembly. The spillway gate may be a tainter or Stoney gate and the pivotable plate assembly may have a deflection plate. A method of infiltrating air in water released from an impoundment may include: lifting a spillway gate from a resting position proximate a bottom of a spillway; and pivoting a deflection plate coupled to the gate proximate the bottom of the spillway; wherein water flows through an opening disposed between the deflection plate and the gate and is sprayed into an atmosphere to be oxygenated.

A diffusiophoretic water filter has improved inlet, outlet and membrane structures. A support is also disclosed as are method for manufacturing and assembling the diffusiophoretic water filter.

The present invention relates to a method of treating a liquid including an organofluorine. The method includes electrochemically treating the liquid to produce a foam and an electrochemically treated liquid, wherein the foam includes the organofluorine and/or degradation products thereof; and separating the foam from the electrochemically treated liquid. This method may alleviate some of the problems associated with the presently available techniques for removing organofluorines from liquids.

The invention provides an electrolytic cell and, more precisely, an electrolytic cell for the production of disinfecting liquids and detergents, the cell has a cylindrical tubular construction and wherein the cathode and the anode are arranged coaxially one with respect to the other, and wherein the anode has a conical shape. The invention furthermore also provides the operating method of the aforesaid electrolytic cell for the production of the aforementioned disinfectant and detergent liquids.

A mobile clarifier system is provided. The mobile clarifier system including a trailer assembly and an inlet port. A plurality of separator cartridge assemblies is supported the trailer assembly and is configured to receive the flow of water and/or processing fluids from the inlet port. Each of the plurality of separator cartridge assemblies is configured to separate the settleable solids and the floatable solids from the flow of water and/or processing fluids and is configured to form flow zones, transition zones and calm zones. A discharge pipe system receives the settleable solids from the calm zones and conveys the settleable solids from the mobile clarifier system to downstream operations and an outlet port configured to receive processed water and/or processing fluids flowing from the plurality of separator cartridge assemblies and further configured to convey the processed water and/or processing fluids to downstream operations.

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.

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.

Disclosed herein is a pool cleaning device having filtering and pumping capabilities. Some embodiments of the disclosed device can be unencumbered by hoses, cables, and the like when in use in the pool. The device may be buoyant and can be configured to float at or just below the surface of the water. The device can comprise a strainer, a pump, a housing for the strainer and pump, and one or more floatation devices. Such a design may allow for a floating skimmer and pump with no need for installation in a side wall. In some embodiments, the device can further comprise a pre-filter. For example, in some embodiments, the strainer and filter can remove large objects and particulates, respectively, before the water passes through the pump. As disclosed in some embodiments, various components of the device may be removeable and replaceable to extend the lifetime of the device.