Described herein are attached growth reactor systems which increase nitrifying bacteria biomass through a variety of means during warm weather. As a consequence, the attached growth reactor system contains sufficient nitrifying bacteria biomass to remove ammonia from wastewater in cold to moderate climates. In one example, there are two attached growth reactors into which wastewater is distributed discontinuously. Specifically, wastewater is transferred to the first attached growth reactor for a first period of time and then is transferred to the second attached growth reactor for a second period of time during warm weather which effectively doubles the nitrifying bacteria biomass in the system. During cold weather, wastewater can be applied to the reactors according to their increased nitrifying bacteria biomass, that is, according to their increased capacity to treat influent wastewater compared to standard operations.

The invention relates to a method and system for the continuous treatment of the water of an aquatic facility using an integrated process control system to control a mixed halogen-based treatment comprising chlorine dioxide and a free halogen. The integrated process control system provides versatile control the chlorine dioxide and/or free halogen while employing in-situ generation of chlorine dioxide.

A purifier includes a housing, a filter, a supply flow path supplying water from a source to the filter, a supply valve on the supply flow path to regulate flow through the supply flow path, a nozzle provided outside of the housing, a purified liquid flow path to guide liquid from the filter toward the nozzle, a hot liquid flow path having one side branched from the purified liquid flow path and another side connected to the nozzle, a hot water module provided to heat liquid in the hot liquid flow path, a sterilization flow path having one side branched from the supply flow path and another side connected to the filter, a sterilization valve provided on the sterilization flow path to regulate flow through the sterilization flow path, and a sterilization module provided on the sterilization flow path to heat liquid in the sterilization flow path.

A system and method for controlling the accelerated remediation of aquatic facilities using at least one sanitizer sensor, a pH sensor, a temperature sensor and a chlorine dioxide sensor all interfaced with a programmable controller that is programmed to implement a remediation cycle and configured to calculate a Ct value, the sensors being in fluid contact with water of the aquatic facility, and the programmable controller is interfaced with a chemical feed system for supplying chlorine dioxide to the water.

This disclosure provides apparatuses and methods for a rotatable, cylindrical basket within a housing, wherein the rotatable, cylindrical basket has a longitudinal bore therethrough and an external surface, and, optionally, other surface areas, comprising filtering media. Further, the housing may include an inlet and an outlet, wherein the inlet and the outlet, optionally openable and closeable, and located at least proximate to opposing ends of the rotatable, cylindrical basket. Further still, the apparatus may include a heating unit removably coupled to the rotatable, cylindrical basket, wherein the heating unit is configured to blow hot air onto at least a portion of the filtering media.

An integrated device and method for treating toxic and refractory wastewater are provided. The integrated device includes an adjusting pool, a first-stage reactor, a second-stage reactor, a third-stage reactor, a coagulation sedimentation pool, and a biochemical reaction pool that are sequentially connected in series, and further includes an aeration blower. Each of the first-stage reactor and the third-stage reactor is an advanced oxidation reactor, and the second-stage reactor is a Fenton reactor. The coagulation sedimentation pool includes 2 to 4 stages, and each stage of the coagulation sedimentation pool includes a coagulation tank, a primary sedimentation tank, and a secondary sedimentation tank that are connected in series. The biochemical reaction pool includes an anoxic tank, an aerobic tank, a settling tank, and a clean water tank that are connected in series. The wastewater treatment method combines the integrated device for treating toxic and refractory wastewater with reasonable process parameters.

A Dielectric Barrier Discharge system controller for controlling a fluid treatment by a Dielectric Barrier Discharge system is provided. Therein, the strength of an effect caused by a discharge created by the Dielectric Barrier Discharge system is monitored, and the generation of high-voltage pulses by the high-voltage pulse generator is controlled. The controlling of the generation of the high-voltage pulses is adapted based on the received sensor data.

An UV disinfection system (200) may feature a chamber (207) with internal spherical reflective surfaces (208) to evenly reflect UV radiation from all angles to direct the UV radiation to all surface area of the object inside the chamber to disinfect object utilizing UV radiation under controlled time. An object (215) to be disinfected may reside within the chamber (207) on a UV transparent rack or shelf (214). The spherical reflective surfaces may be fashioned by placing such surfaces on a polyhedral internal structure or making the internal chamber spherical in and of itself (208). Multiple UV sources (209a), (209b) may also be utilized.

A water purification apparatus (300) capable of being cleaned at a point of care, and methods for cleaning the water purification apparatus (300) at the point of care. The water purification apparatus (300) and the methods provide an efficient use of a heater (302) for heat disinfection the water purification apparatus (300), e.g. by recirculating heated fluid to further heat the fluid. Several different cleaning programs are provided that may be utilized for cleaning different parts of the water purification apparatus (300).

Water treatment method for simultaneous abatement of carbon, nitrogen and phosphorus, implemented in a sequencing batch moving bed biofilm reactor (SBMBBR) comprising carriers suitable for the development of a biofilm. The method comprises sequences of successive treatments, each treatment sequence comprising:

an initial phase of anaerobic treatment,

said initial phase of anaerobic treatment being followed by at least one aerobic/anoxic cycle consisting of: an aerobic treatment phase so as to obtain an ammonium ion concentration that does not pass below a threshold concentration of ammonium ions; and

a phase in which the biofilm is placed, at least locally, under anoxic conditions, this phase being concomitant with or posterior to said aerobic treatment phase; the threshold concentration of ammonium ions being calculated to allow the development of Anammox microorganisms during the phase in which the biofilm is placed, at least locally, under anoxic conditions.