A water monitoring device monitors and maintains swimming pool chemistry. The device mixes reagents with water in flowcells. The water chemistry is detected by measuring the light transmitted through the flowcells. The water monitoring device can communicate with computers, servers and mobile computing devices which can store and display the water chemistry information. The reagents can be stored in a replaceable reagent cartridge which can provide reagents for water testing and can be replaced when the reagents need to be replenished.

The invention relates to treatment of microorganisms from an activated sludge process operating with enhanced biological phosphorus removal in a reactor with baffles or other devices to induce similar plug-flow effort, designed to optimally release phosphorus and/or magnesium from the microorganisms with or without chemical addition. Further, the disclosure relates to a process designed to produce both a lower solids, phosphorus and magnesium enriched liquid stream and a higher solids, phosphorus and magnesium enriched stream. The reactor operates to give optimal performance by operating in a plug-flow mode.

This invention relates to an operation management system, a diagnostic method, and an operation management method for a wastewater treatment facility which uses activated sludge. The operation management system for a wastewater treatment facility includes: a storage means for storing a reference value for each index of a plurality of indexes indicating a state of an aeration tank; an input means for inputting a measured value of the index; a comparison means for comparing the input measured value with the reference value for each index, and categorizing each measured value as one of being within a reference value range, over the reference value, or less than the reference value; a storage means for storing diagnostic patterns, in which the diagnostic patterns are classified according to a combination of categories of: within the reference value range, over the reference value, or less than the reference value for each index, using the reference value as a reference; a checking means for checking a combination of categories of each index of the measured values against a combination of categories of each index of the diagnostic patterns, and extracting a diagnostic pattern which the combination of categories has matched; and a display means for displaying the diagnostic pattern which the combination of categories has matched.

A process for enriching phosphorus and recovering vivianite by a biofilm method includes the following steps: 1) an aerobic phosphorus absorption stage; 2) an anaerobic phosphorus release stage; 3) a cyclic enrichment stage; 4) a seed crystal forming stage; and 5) a crystal forming stage. Phosphorus is enriched by the biofilm method and recovered with vivianite as a recovery product, which solves the problem of phosphorus removal from municipal sewage and improves the economic value; by preparing high dissolved oxygen at the aerobic stage, a high-concentration phosphorus recovery solution can be obtained with a relatively low carbon-phosphorus ratio and relatively high enrichment times, and the consumption of carbon sources can be reduced; since the oxidation-reduction potential is controlled to be less than −100 mv by the biofilm method at the anaerobic phosphorus release stage, the oxidation-reduction potential does not need to be adjusted again during the recovery of vivianite,

In one embodiment, a differential water data analysis system includes a data storage, a user interface, and a processor coupled to the data storage and programmed with software to: receive inflow water measurement data from a water inflow line entering a water treatment system and outflow water measurement data from a water outflow line exiting the water treatment system, the inflow water measurement data and outflow water measurement data being obtained by measuring the water in the water inflow line and the water outflow line at about the same time and being received in real time; compare the inflow water measurement data and the outflow water measurement data; compute a performance of the water treatment system based on the comparison using a computation scheme; determine whether the performance is within specification of the water treatment system to produce a determination output; and display the determination output in the user interface.

A process for controlling the aeration rate during the aerobic phase of a wastewater treatment process is disclosed, which comprises: (a) measuring at moment t.sub.1 the ammonium concentration [NH.sub.4.sup.+].sub.1 and nitrogen oxide concentration [NO.sub.x].sub.1 in a mixture of wastewater and microbial sludge; (b) determining a nitrogen oxide target concentration [NO.sub.x].sup.F.sub.1 at the end of the aerobic phase based on at least the current ammonium concentration [NH.sub.4.sup.+].sub.1 and the current NO.sub.x concentration [NO.sub.x].sub.1; (c) determining a setpoint [NO.sub.x].sup.SP.sub.1 based on interpolation between [NO.sub.x].sub.1 and [NO.sub.x].sup.F.sub.1; (d) adjusting the aeration rate to minimise error between [NO.sub.x].sub.1 and [NO.sub.x].sup.SP.sub.1; and (e) repeating steps (a) to (d) at further moments t.sub.1. The invention further concerns a process for the treatment of wastewater, using the process.

An apparatus has a platinum group metal carrying resin column provided in a supply line of ultrapure water, and has a pH adjuster injection device and a redox potential adjuster injection device provided in a later stage thereof. The apparatus has a membrane-type deaeration apparatus and a gas dissolving membrane apparatus sequentially provided in a later stage of the devices, and a discharge line communicates with the gas dissolving membrane apparatus. A pH meter and an ORP meter are each provided at some midpoint in the discharge line, and the pH meter and the ORP meter are connected to a control device. Then, the control device controls the amount of adjusters to be injected from the pH adjuster injection device and the redox potential adjuster injection device, on the basis of the measurement results of the pH meter and the ORP meter.

A treatment solution and method for removing heavy metal contaminants and oxyanion contaminants from an aqueous solution by promoting the affinity of precipitating the contaminants. The method adjusts the pH and the ORP of the contaminated aqueous solution by applying FeCl.sub.2 and/or NaOH reducing agents, and using and applying a titania-based treatment solution of TiO(SO.sub.4), H.sub.2SO.sub.4, and FeSO.sub.4.

The current invention relates to an artificial intelligence, internet of things (IoT) based water body management system. The water body management system of the invention comprises of an aeration module, a nutrient dispensing module, and a sensor module which monitors and maintains water quality parameters. The artificial intelligence module configured with the sensor module trains the data obtained from the sensors and inputs to the aeration, nutrient dispensing or other modules. The current invention has applications in aquaculture management, management of water bodies like lakes, reservoirs, and ponds.

A system and method for monitoring disinfectant levels in non-human animal drinking water using ORP and optionally pH measurements and adding disinfectant or pH adjusting agents as needed. Sensors obtain measurements of the water upstream of a point of consumption and a controller compares measurements to predetermined thresholds, ranges, or previous measurements to determine if the disinfectant and optionally pH levels are within a desired range or above or below a desired minimum or a desired maximum value. A disinfectant dosing system preferably automatically adds disinfectant to the supply line based on the measurement comparison. A flow switch preferably keeps the system from activating disinfectant addition when water in the supply line is static (non-flowing). An alert is preferably triggered when a measurement indicates the disinfectant level is too low or too high or when a volume of disinfectant in the dosing system is below a predetermined volume threshold.