A system and method for treating wastewater in a reactor of the system at or below a predetermined flow rate and at or above a predetermined temperature is provided. Incoming wastewater in excess of the predetermined flow rate is directed to an equalization basin for storage. Wastewater stored in the equalization basin is directed to the reactor when (a) the temperature of such stored wastewater is equal to or greater than the predetermined temperature and (b) wastewater is received by the system at a rate less than the predetermined flow rate. The method also involves the step of repurposing a lagoon basin of an existing lagoon system to function as the equalization basin. The system may further include an integrated control system for directing wastewater stored in the equalization basin to the reactor when predetermined conditions are met.

The liquid purification system comprises a source liquid supply, a purified liquid feed line to a consumer, a liquid purification unit including a liquid-liquid type container consisting of a body containing a storage cavity for purified liquid and a displacement cavity, at least one liquid purification unit, a drainage line and a liquid flow control system including a source liquid feed section and a purified liquid feed section. The liquid flow control system is configured with a source liquid distribution section arranged for maintaining liquid pressure in the displacement cavity intended mainly for source liquid. The system provides the purified liquid feed to the consumer at any stage of the liquid purification process and after the latter is completed.

A portable water collection, filtration and power generation system is provided. The system is comprised of a holding tank, a filtration system, a reverse osmosis system an electrical power generator a mobile transport unit that holds the holding tank, filtration system, reverse osmosis system, and the electrical power generator. The holding tank is configured to receive water from a water source. The filtration system is fluidly coupled to the holding tank and includes an input configured to receive water from the holding tank, a filter disposed in fluid communication with the input, and an output to configured to discharge filtered water from the filtration system. The reverse osmosis system is fluidly coupled to the filtration system. The reverse osmosis system includes an input configured to receive filtered water from the filtration system and an output to configured to discharge reverse osmosis water. At least one electrical power generator is electrically coupled either the filtration system or the reverse osmosis system.

Systems and methods for treating wastewater including a dissolved air flotation operation performed upon a portion of a mixed liquor output from a contact tank prior to the mixed liquor entering a biological treatment tank.

A deposit monitoring device includes a non-permeated water line discharging non-permeated water where dissolved components and dispersed components are concentrated from water to be treated from a separation membrane device for obtaining permeated water by concentrating the dissolved components and dispersed components from water to be treated by a separation membrane; a first deposit detecting unit using part of the non-permeated water branched off as a detection liquid, and having a first separation membrane for detection in which the detection liquid is separated into permeated water for detection and non-permeated water for detection; a deposition condition altering device altering deposition conditions for deposits in the first separation membranes for detection; and first flow rate measuring devices for separated liquid detection that measure the flow rates of one or both of the permeated water for detection and the non-permeated water for detection separated by the first separation membrane for detection.

A water purifying apparatus including a head having a water inlet portion and a water outlet portion; a shaft provided in the head and rotatably mounted between the water inlet portion and the water outlet portion; a bypass flow path passing through a circumference of the shaft, and communicating the water inlet portion with the water outlet portion according to rotation of the shaft; a filter detachably mounted to the head, and having a filter inserting portion in which the shaft is inserted when being mounted on the head; and a filtering flow path in which an inlet port and an outlet port are formed on the circumference of the shaft in a direction intersecting the bypass flow path, and communicated between the filter, the water inlet portion and the water outlet portion with each other according to the rotation of the shaft.

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.

Method and system for treating wastewater includes treating sludge with ozone in a plug-flow type reactor to cause lysis of biosolids in the sludge. The ozonated sludge may be provided to an anaerobic or anoxic section of the wastewater treatment system to aid the denitrification processes occurring in the anaerobic or anoxic section of the wastewater treatment system or to other sections of the wastewater treatment system such as a fermenter, an aerobic digester, or an anaerobic digester.

Method for treating production wastewater from the preparation of propylene oxide by co-oxidation. The wastewater includes a first portion of wastewater having a peroxide content of 2000 mg/L or more and a second portion of wastewater having a peroxide content of 50 mg/L or less.

Disclosed is a water treatment apparatus that includes a head including an inlet portion into which water flows, an outlet portion from which water is discharged externally, and a connection portion connected to the inlet portion and the outlet portion, and a water treatment unit connected to the connection portion, including a plurality of water treatment sections, coupled to the head, and configured such that a portion of the water flowing into the inlet portion passes through the plurality of water treatment sections and sequentially, the remainder of the water passes through only a portion of the plurality of water treatment sections and, and the water flows to the outlet portion together.