A method for managing a wastewater treatment process. The method includes at least the steps of measuring an amount of at least one nitrogen-containing substance in the influent wastewater (CN, influent), and determining an amount of phosphorous to be removed from the influent wastewater (CP, influent) based on the measured amount of at least one nitrogen-containing substance in the influent wastewater (CN, influent).

A filtration treatment system of raw water includes a raw water supply line to supply raw water, a filtration device provided on the raw water supply line to filter impurities in the raw water, a separation device provided on a rear side of the filtration device and equipped with a separation membrane to separate filtered raw water into permeated water and concentrated water; an organic substance monitoring device provided on either front or rear or both front and rear of the filtration device to monitor an amount of an organic substance in the raw water, and a control device to execute backwashing of the filtration device with the permeated water as backwashing water in a case in which the amount of the organic substance in the raw water exceeds a reference value as a result of monitoring by the organic substance monitoring device.

Disclosed herein is a water treatment system for connection to a water treatment plant (e.g. a dissolved air flotation device). The plant may have an inlet for the receipt of feed water (e.g. waste water) and an outlet for the discharge of treated water. The treatment system may comprise a first sensor disposed such that it is in fluidity communication with the feed water, and a second sensor disposed such that it is in fluidity communication with the treated water. The first and second sensors may be configured to sense parameters of the feed and treated water. The system may further comprise a first applicator (e.g. a pump) that is configured to discharge a treatment source (e.g. a chemical source) to the plant to treat the feed water. The disclosed system may be used to treat waste water (e.g. the treatment of effluent from oil refineries, petrochemical and chemical plants, natural gas processing plants, paper mills and general water treatment). The system has analogous applications in other processing methods that also use DAF, or very similar, systems, such as the processing of mineral ores and other such solid extraction processing methods.

An additive dispensing system for a refrigerator that includes a reservoir configured to contain an additive and an additive outlet in fluid communication with the reservoir. The additive dispensing system is configured to be connected to a refrigerator and is operable to selectively dispense an amount of additive to water dispensed from the refrigerator. The additive dispensing system may be connected to a water filtration system of the refrigerator such that the additive dispensing system may dispense the amount of additive into filtered water dispensed from the refrigerator.

A liquid treatment device includes a base with a power source, a UV-LED module for providing UV-B or UV-C light to liquid, an LED for providing visible light, and a processor for selectively powering the UV-LED module and the LED, and having a UV transmissive material above the UV-LED module for allowing the UV-B or UV-C band light from the UV-LED module to be transmitted from the base housing, and a liquid storage housing removably coupled to the base housing with a storage portion configured to hold liquid and having a bottom portion comprising a UV transmissive material for allowing the UV-B or UV-C band light from the UV-LED module to be transmitted into the liquid, and an output coupled for restricting outflow of the liquid from the storage portion.

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.

A method and system for wastewater treatment based on dissolved oxygen control by a fuzzy neural network, the method for wastewater treatment comprising the following steps: (1) measuring art inlet water flow rate, an ORP value in an anaerobic tank, a DO value in an aerobic tank, an inlet water COD value, and an actual outlet water COD value; (2) collecting the measured sample data and sending them via a computer to a COD fuzzy neural network predictive model, so as to establish an outlet water COD predicted value, (3) comparing the outlet COD predicted value with the outlet water COD set value, so as to obtain an error and an error change rate, and using them as two input variables to adjust a suitable dissolved oxygen concentration. Accordingly, the on-line prediction and real-time control of dissolved oxygen wastewater treatment are achieved. The accurate control of dissolved oxygen concentration by the present method for wastewater treatment can achieve a saving in energy consumption while ensuring stable running of the sewage treatment system, and the outlet water quality meets the national emission standards.

A scale suppression apparatus capable of suppressing in a low-priced manner the generation of silica-based scale and calcium-based scale in the influent water, a geothermal power generation system using the same, and a scale suppression method are provided. The apparatus includes a first addition unit configured to add liquid containing a chelating agent and an alkaline agent to influent water flowing through a pipe arrangement to make the influent water higher than pH 7, a second addition unit configured to add an acid substance to the influent water to make the influent water lower than pH 7, and a controller configured to alternatively switch between the operation of the first addition unit and the operation of the second addition unit. The controller controls the switching of the first addition unit and the second addition unit based on the signals output from a scale detection unit and a pH meter.

There is set out highly efficient processes for the production of alkaline spring waters. The processes are designed to minimize the use of the additive alkaline formulations used to create the alkalinity in the spring waters and the use of a maximum amount of non-purified spring water in the formulation of the final alkaline spring water product. This is accomplished by dividing the input spring water into at least two portions. One portion undergoes a purification process and the other is not purified. Each portion is tested in increments for the amount of alkaline formulation needed to attain a pH of at least about 10 and designated potassium ion and sodium ion contents. From the testing the amount of the purified spring water and the amount of non-purified spring water needed to be combined to yield a pH of at least about 10 and the designated potassium ion and the sodium ion contents is calculated. It is desired to use a minimum of alkaline formulation to achieve the set Ph and potassium and sodium ion concentration. In this way the more costly components of the alkaline formulation and the purified spring water can be minimized, but yet the taste and stability maintained over a period of time. The processes apply to waters from a single spring and from a plurality of springs.

Chemically oxidizing a wide range of targeted contaminants in soils, sludges, groundwater, process water, and wastewater and assisting in the eventual (over time) biological attenuation of the contaminants utilizing persulfates activated by trivalent metals, such as ferric iron. The use of trivalent metal activated persulfate results in a chemical oxidation process that yields degradation compounds which facilitate further attenuation via biological processes.