A method for intensification of advanced biological nitrogen removal and reduction of endocrine disrupting toxicity, and belongs to the technical field of advanced wastewater treatment includes the steps of utilizing the reaction of calcium sulfate and hydrogen peroxide solution under alkaline conditions to prepare nano-calcium peroxide (n-CP) oxygen-releasing materials, then the polyvinyl alcohol is used as a framework material, the sodium carboxymethyl cellulose is used as a bonding agent, the stearic acid is used as buffering agent and stabilizing agent, the prepared n-CP is used as an oxygen-releasing material, and the quartz sand is used to increase the material density to the sustained-release calcium peroxide nanoparticles (SR-nCPs) through the encapsulation method.

A system and method of treating wastewater. In one embodiment, the system comprises a biological reactor fluidly connected to a source of wastewater and having a treated wastewater outlet, a fixed film biological reactor connected to the source of wastewater and having a fixed film effluent outlet, and a ballasted system fluidly connected to the fixed film effluent outlet. The ballasted system may comprise a ballast reactor tank configured to provide a ballasted effluent, and a source of ballast material fluidly connected to an inlet of the ballast reactor tank. The system may further comprise a bypass line having an inlet fluidly connected to the source of wastewater, a first outlet fluidly connected to the ballasted system, and a second outlet fluidly connected to the fixed film biological reactor, the bypass line configured to bypass the fixed film biological reactor.

In general, the present invention is directed to systems and methods of providing improved ballasted clarification systems for the treatment of water or wastewater. In accordance with some embodiments, a method may include introducing an influent including the water or wastewater and a coagulant; agitating or mixing the influent causing flocs to develop; introducing polymer and ballast wherein the ballast has an aspect ratio of less than 1.15; agitating or mixing the influent causing the ballast to move through the influent and penetrate the flocs; agitation or mixing the flocs to cause larger flocs to form through collision of smaller flocs among the flocs; providing the influent into a clarifying tank having a bottom and a top, wherein the ballast particles in flocs cause the flocs to settle to the bottom of the clarifier; and outputting an effluent from the top of the clarifying tank.

Systems and methods for water treatment involving use of a magnetic ballast material to facilitate settling operations are provided. Magnetic ballast material is recovered downstream of clarification with a magnetic drum for reuse. At least one in-line magnetic recovery device augments the recovery of magnetic ballast material.

Multilayered electrolyte compositions and methods for their manufacture and use are described. The compositions can have an inner core and one or more coating layers. The compositions can contain at least one chlorine source and at least one citrate salt. The compositions are useful for treating water to improve safety, among other things.

A treatment system and method for removal of nutrients and other pollutants to produce a low solid, high quality effluent suitable for discharge or reuse using a combination of aerobic granular sludge (AGS), either in a sequencing batch reactor (SBR) AGS configuration or in a flow through AGS configuration, in combination with immersed/submerged membranes commonly referred to as membrane bio-reactor (MBR) wastewater treatment processes, systems, and methods.

A method for continuous supply of peracetate oxidant solution with activity to generate to generate reactive oxygen species includes production processing in a liquid stream starting with a feed water and sequentially adding alkali concentrate, hydrogen peroxide solution and acetyl donor and introducing a resulting peracetate oxidant solution into a product buffer tank from which the peracetate oxidant solution is dispensed for use as a reactive oxygen species-generating oxidant, In the product buffer tank peracetate oxidant solution has a pH in a range of from pH 10 to pH 12, a molar ratio of peracetate anions to peracid in a range of from 60:1 to 6000:1 and a molar ratio of peracetate anions to hydrogen peroxide of greater than 16:1.

A wastewater treatment system including a contact tank, a dissolved air flotation unit, a fixed film reactor, and a solids-liquid separation unit is disclosed. A method of treating wastewater with a dissolved air flotation unit and a fixed film reactor is also disclosed. A method of retrofitting a fixed film reactor wastewater treatment system including providing a contact tank and a dissolved air flotation unit is also disclosed. A method of facilitating increased operating efficiency of a fixed film wastewater treatment system including providing a dissolved air flotation unit is also disclosed.

A method of extracting water from sludge, wherein the sludge includes a magnetic ballast, wherein the sludge is positioned on an interface. It includes applying a magnetic treatment to the magnetically-ballasted sludge to extract water from the sludge.

A system and method is provided for water and wastewater treatment. The system comprises a fixed film biological process and a ballasted flocculation process.