A system and method for static mixing in a waste water settling tank to increase recovery of first entrained solids and solvated materials, comprising a settling tank having a recirculation ring and a hopper bottom defining a sludge hopper having a flat bottom portion, a fluid containment assembly, and a fluid deflector assembly with an optional fluid dispersion assembly. The system further comprises an inlet pipe for introduction of waste water containing second entrained solids and solvated materials into the settling tank and a discharge outlet in proximity to the underside of the fluid deflector assembly with nozzle facing downward. Influent waste water is directed both downward into the fluid containment assembly and upward into the center of the fluid deflector assembly and an optional fluid dispersion assembly to distribute the influent into contact with previously introduced waste water to cause coalescence of the first and second entrained solids.

A system may include a catch tray coupled with a flow distributor. A mesh screen and carriage may be positioned within the catch tray. A drive bar may be coupled with the carriage and a pitman arm. A gear box may be coupled with a motor and the pitman arm. A process may include distributing contaminated fluid onto the mesh screen. A screen plane of the mesh screen may be at a screen angle that is oblique relative to the direction of the force of gravity. The screen plane is defined by a top surface of the mesh screen. The process may include moving the carriage in a reciprocating linear motion by rotating the pitman arm, and spraying a liquid onto the mesh screen. Liquid may flow through the mesh screen forming clarified liquid, and contaminate may move along the top of the mesh screen to a contaminate outlet.

A system may include a catch tray coupled with a flow distributor. A mesh screen and carriage may be positioned within the catch tray. A drive bar may be coupled with the carriage and a pitman arm. A gear box may be coupled with a motor and the pitman arm. A process may include distributing contaminated fluid onto the mesh screen. A screen plane of the mesh screen may be at a screen angle that is oblique relative to the direction of the force of gravity. The screen plane is defined by a top surface of the mesh screen. The process may include moving the carriage in a reciprocating linear motion by rotating the pitman arm, and spraying a liquid onto the mesh screen. Liquid may flow through the mesh screen forming clarified liquid, and contaminate may move along the top of the mesh screen to a contaminate outlet.

At least one method and system for pre-treating wastewater is described. The method generally involves providing high strength wastewater and waste activated sludge from a wastewater treatment plant to a first reactor, forming a mixed liquor therefrom, aerating the mixed liquor, allowing the aerated mixed liquor to settle to form a clarified supernatant and a biomass, and providing the clarified supernatant to a liquid treatment train of the wastewater treatment plant. After allowing the mixed liquor to settle into the clarified supernatant and the biomass, the biomass may be provided to a second reactor, aerated, and provided to a solid treatment train of a wastewater treatment plant. The system generally includes a first reactor, a second reactor and optionally, a mechanical sludge thickening apparatus that are coupled to a high strength wastewater source and a wastewater treatment plant having a liquid treatment train and a solid treatment train.

A method for pretreatment of wastewater or recreational water with substantial reduction of total suspended solids and turbidity in a very short time is provided comprising treatment with nanocomposites and a bridging agent.

This invention pertains to an anti-scaling composition comprising a blend of a polyamino acid; an anionic carboxylic polymer; and a polymaleic acid. The blend is able to effectively stabilize calcium salts that lead to scale formation in evaporative systems. This three-component blend shows high levels of efficacy in acidic high conductivity waters found in many evaporative systems such as sugar and bio-refining.

A vermicomposting system for treating waste water streams that includes a pretreatment stage for converting liquid or semi-liquid organic waste streams into a feedstock for vermicomposting; a vermicomposting digestion stage having populations of worms and beneficial bacteria which consume and break down organic material and nutrients present in the feedstock from the pretreatment stage to create worm castings, vermicompost, and a liquid compost tea that contains plant nutrients, plant growth promoting substances, and beneficial bacteria; and a post-treatment stage in which the liquid compost tea is removed for use as an soil amendment or inoculant, or is further treated in a separate containment tank where nutrients and oxygen levels are controlled to increase specific bacterial and fungal populations.

A system may include a catch tray coupled with a flow distributor. A mesh screen and carriage may be positioned within the catch tray. A drive bar may be coupled with the carriage and a pitman arm. A gear box may be coupled with a motor and the pitman arm. A process may include distributing contaminated fluid onto the mesh screen. A screen plane of the mesh screen may be at a screen angle that is oblique relative to the direction of the force of gravity. The screen plane is defined by a top surface of the mesh screen. The process may include moving the carriage in a reciprocating linear motion by rotating the pitman arm, and spraying a liquid onto the mesh screen. Liquid may flow through the mesh screen forming clarified liquid, and contaminate may move along the top of the mesh screen to a contaminate outlet.

The invention provides a method of treating waste comprising the steps of: providing an electrochemical cell comprising a cathode, and an anode; supplying a waste stream comprising an organic compound which is a liquid or dissolved in a solvent and contacting the anode and cathode with the waste stream; electrochemically oxidising the organic compound at the anode; supplying oxygen to the cathode; electrochemically reducing the oxygen at the cathode; wherein the cathode comprises a poison resistant oxygen reduction catalyst.

Systems and methods for treating vinasse are disclosed. The methods treat vinasse to generate useable water. The methods include providing vinasse, reacting the vinasse with persulfate to generate an oxidized mixture, reacting the oxidized mixture with peroxide to generate a peroxide-treated mixture, adjusting the pH of the peroxide-treated mixture to above about pH 6 to generate a pH-adjusted mixture, reacting the pH-adjusted mixture with an inorganic coagulant and a low molecular weight cationic polymer to generate solid particles, and removing the solid particles to generate a liquid fraction.