A biofilter irrigation system comprises a cylindrical vessel having a central axis, a media bed positioned within the vessel, a spray head system positioned above the media bed, the spray head system comprising a central hub positioned at the central axis of the vessel, at least one arm extending distally from the central hub toward a wall of the vessel and configured to rotate about the central axis, and a plurality of nozzles connected to the at least one arm. The biofilter irrigation system further comprises a fluid outlet positioned below the media bed.

A system and method for delivering silver ion biocide is described herein. The systems described relate to passing water from a water system through a silver ion release module and optional high-concentration silver ion release module. The system includes an analyzer, detector, and/or controller for monitoring the concentration of silver ion and adjusting the flow path, flow rate, temperature and/or pH of the water in order to obtain the desired concentration of silver ion. The system optionally includes other metal ions released into a water system, the concentration of which may be used to automatically calibrate the described system and/or cause the system to take actions based on the measured concentration of silver ion or of the second metal ion.

Disclosed are methods and systems that facilitate more accurate measurement of the turbidity, i.e., insoluble ion content, of source water streams in water treatment processes, and in turn more accurate dosing of metal salt coagulants to cause these insoluble ions to floc and precipitate from the source water stream. Methods and systems for calibration of streaming current sensors used for such turbidity/insoluble ion content measurement are also disclosed.

A recirculating aquaculture system (RAS) is disclosed, which includes a main tank, in which fish or shellfish are farmed; a first reactor fluidically connected to the main tank, wherein the first reactor is a batch reactor that operates under anoxic conditions; a second reactor fluidically connected to the main tank, wherein the second reactor is a moving bed biofilm reactor (MBBR);a feed stream fluidically connected to the main tank; and a data-driven controller operably connected to the first reactor, the second reactor, and the feed stream, wherein the data-driven controller is configured to bring and maintain the system (RAS) at a desired state.

A system for on-line monitoring of a supercritical water oxidation (SCWO) process, the system including an SCWO reactor, a feedstock supply line which supplies a feedstock to the SCWO reactor, an oxidant supply line which supplies an oxidant to the SCWO reactor, at least one sensor which measures at least one parameter of the feedstock and the oxidant, and a controller which determines a Chemical Oxygen Demand (COD) and a Heating Value (HV) of the feedstock based on the at least one parameter, such that the controller adjusts the amount of the oxidant supplied to the SCWO reactor based upon the COD and the HV of the feedstock.

A system comprising: a centralized data acquisition subsystem to receive input data from one or more data silos; a data storage subsystem adapted to process, and store the received input data; a bridge application subsystem to securely ingest the received input data from the centralized data acquisition subsystem into the data storage subsystem; wherein the bridge application subsystem comprises a custom bridge program subscription; a data refining subsystem that is connected to the data storage subsystem and refines the input data acquired by the data storage subsystem, removes abnormal data and stores refined input data after refining; a predictive analytical subsystem is configured to generate output data using the refined input data from the data storage subsystem for processing and computing the input data to create a predictive analysis.

Techniques for controlled aeration (140) of wastewater (190) include determining a first aeration intensity for a first aeration interval and a different second aeration intensity for a second aeration interval (225) based on a current energy price (215), a predicted energy price (221), and a regulatory surveillance period (201) during which a regulated critical parameter is monitored for regulatory compliance. Wastewater is aerated at the first aeration intensity for the first aeration interval; and at the second aeration intensity for the second aeration interval. The first aeration interval is short compared to the regulatory surveillance period, the second aeration interval is short compared to the regulatory surveillance period and does not overlap the first aeration interval, and the first aeration intensity is less than the second aeration intensity.

Provided herein are methods of reducing microbial concentrations in water with a peracid disinfectant. The method can include the steps of measuring the quality of the water in real-time and dosing the water with a first dose of a peracid disinfectant; measuring the peracid disinfectant demand; and adding one or more subsequent doses of the peracid disinfectant. The subsequent peracid disinfectant dose can be controlled by a processor-based controller based on peracid disinfectant demand.

A solution for treating a fluid, such as water, is provided. An ultraviolet transparency of a fluid can be determined before or as the fluid enters a disinfection chamber. In the disinfection chamber, the fluid can be irradiated by ultraviolet radiation to harm microorganisms that may be present in the fluid. One or more attributes of the disinfection chamber, fluid flow, and/or ultraviolet radiation can be adjusted based on the transparency to provide more efficient irradiation and/or higher disinfection rates. In addition, various attributes of the disinfection chamber, such as the position of the inlet(s) and outlet(s), the shape of the disinfection chamber, and other attributes of the disinfection chamber can be utilized to create a turbulent flow of the fluid within the disinfection chamber to promote mixing and improve uniform ultraviolet exposure.

A drinking water vending dispenser for dispensing purified water comprising a coarse mechanical filter, an RO purification unit, an ozone purification unit, a UV purification unit, an active carbon filter, a chemical base purification unit and a fine mechanical filter.