Abstract: A method of reducing silica fouling in an aqueous system is provided. The method includes adding a composition including a ferric salt and a magnesium salt to an aqueous medium to precipitate silica in the aqueous medium and form a precipitated silica. The method also includes removing at least a portion of the precipitated silica from the aqueous medium to form an aqueous supernatant.

Abstract: A multi-purpose reagent composition is used for simultaneously determining concentrations of at least two analytes in a water sample. The two analytes are selected from the group consisting of free chlorine, pH, anionic polymer, and phosphates. In one embodiment, the multi-purpose reagent composition is for simultaneously determining the concentration of free chlorine and pH and comprises a free chlorine sensitive dye and pH indicator. In another embodiment, the reagent composition is for simultaneously determining of free chlorine and anionic polymer and includes a free chlorine sensitive dye, a pH buffer, cationic dye, and organic co- solvent. Thus, the pairs of free chlorine and pH or free chlorine and anionic polymer are determined using a single reagent composition. The reagent composition can also be the main reagent for one analyte analysis when it is used alone and also function as an ancillary reagent when it is combined with a second reagent composition for the determination of another analyte.

Abstract: A method using a multi-purpose reagent composition to simultaneously determine concentrations of at least two analytes in a water sample. In one embodiment, the multi-purpose reagent composition used is for simultaneously determining free chlorine concentration and pH and comprises a free chlorine sensitive dye and a pH indicator. In another embodiment, the reagent composition used is for simultaneously determining of free chlorine and anionic polymer and includes a free chlorine sensitive dye, a pH buffer, a cationic dye, and an organic co-solvent. Thus, the pairs of free chlorine and pH or free chlorine and anionic polymer are determined using a single reagent composition. The reagent composition can also be the main reagent for one analyte analysis when it is used alone and also function as an ancillary reagent when it is combined with a second reagent composition for the determination of another analyte.

Abstract: The present invention relates to a system for optimization of dosing in water treatment, a water treatment system and a method therefor. The system for optimization of dosing in water treatment according to the present invention comprises: a chemical reagent addition device, for adding a certain dosage of a chemical reagent into a water sample to be treated at a predetermined interval; an optical detection module, for detecting in real time a change in particle size of particles in the water sample after the addition of the chemical reagent; and a chemical reagent dosage determination device, which determines an optimized dosage of the chemical reagent for coagulating the particles in the water sample, according to the correlation between the change in particle size obtained by the optical detection module and the dosage of the added chemical reagent.

Abstract: The present invention relates to a detection system and method and a water treatment system and method. The detection system according to the present invention is capable of detecting particle state in a medium. Said detection system comprises: an optical probe comprising of at least one transmitting optical fiber for transmitting light to the medium, and at least two receiving optical fibers for receiving light reflected or backscattered from the medium, with at least the end of the optical probe being positioned in the medium when detection is carried out by the detection system; and a signal processing module connected to the optical probe, for converting optical signals from the receiving optical fibers of the optical probe into electrical signals and determining particle state in the medium on the basis of the electrical signals.

Abstract: The invention provides devices, methods, and compositions for dry chemical reagents to measure calcium, magnesium (total hardness), and other analytes in water using colorimetric devices. The measurement may be a one-step procedure without the need of dilution and multi-step preparation, so that it can be easily employed by untrained personnel. The chemical reagents may include dyes, buffer reagents, masking reagents, competing ligands, and other chemicals such as fillers. The chemical reagents may be grinded together as a homogenous fine powder, equally dispensed into small containers for each test or dried as film or solid using the means of air, low heat or vacuum. The composition may be easily dissolved into water samples and stable for long term storage.

Abstract: A multi-purpose reagent composition is used for simultaneously determining concentrations of at least two analytes in a water sample. The two analytes are selected from the group consisting of free chlorine, pH, anionic polymer, and phosphates. In one embodiment, the multi-purpose reagent composition is for simultaneously determining the concentration of free chlorine and pH and comprises a free chlorine sensitive dye and pH indicator. In another embodiment, the reagent composition is for simultaneously determining of free chlorine and anionic polymer and includes a free chlorine sensitive dye, a pH buffer, cationic dye, and organic co-solvent. Thus, the pairs of free chlorine and pH or free chlorine and anionic polymer are determined using a single reagent composition. The reagent composition can also be the main reagent for one analyte analysis when it is used alone and also function as an ancillary reagent when it is combined with a second reagent composition for the determination of another analyte.

Abstract: Measuring the concentration of an analyte in an aqueous solution by obtaining an aqueous solution containing an analyte, providing a cyanine indicator, placing the aqueous solution in fluid communication with the cyanine indicator, measuring a detectable property change of the cyanine indicator, and comparing the detectable property change of the cyanine indicator with a calibration curve of the detectable property change of samples containing known concentrations of the analyte. The concentration of the analyte is determined using the detectable property change that is proportional to the concentration of the analyte in the aqueous solution.

Abstract: The present invention concerns a method of measuring the concentration of an analyte in an aqueous solution that comprises the steps of: obtaining an aqueous solution containing an analyte, providing a cyanine indicator, placing the aqueous solution in fluid communication with the cyanine indicator, measuring a detectable property change of the cyanine indicator, and comparing the detectable property change of the cyanine indicator with a calibration curve of the detectable property change of samples containing known concentrations of the analyte to determine the concentration of the analyte, wherein the detectable property change is proportional to the concentration of the analyte in said aqueous solution.