5 results about "Phosphate loading" patented technology

The application discloses a kind of total phosphorus and phosphate simultaneous automatic analysis system and device, belong to chemical analysis and quantitative technical field, for the simultaneous automatic determination of total phosphorus and phosphate content in water quality monitoring field and carry out relevant research.This application uses plunger pump to provide power for fluid, through the suction effect of plunger pump and three-way electromagnetic valve combination on-off electricity to realize the accurate quantification of reagent and sample volume;The pushing action of plunger pump sequentially injects different reagents and samples into the system flow path to produce color reaction and obtain response signal;During the heating digestion process of total phosphorus sample, the phosphate content in the sample can be determined simultaneously, which greatly reduces the overall analysis program time length;In addition, by changing the pushing speed of plunger pump, the retention time of reagent plug and sample plug in the system, i.e. reaction time, is adjusted, so that the effective detection range of total phosphorus and phosphate can be automatically switched.

The present disclosure discloses a process that determines the presence of phosphonate in saline water without specific equipment and can be used with simple resources if necessary. The process is carried out in two parts: 1) conversion of phosphonate by thermal method, and 2) determination of phosphate applying the analytical method based on digital images (DIA). Furthermore, the process for detecting phosphonates was developed with the concept of a portable analytical method capable of being performed even by analysts without training in chemical operations.

The present disclosure relates to a pharmaceutical composition for providing phosphorus to an adult or pediatric patient, wherein the composition is an aqueous solution of sodium glycerophosphate which by virtue of an improved process for producing the active pharmaceutical ingredient and the pharmaceutical composition is characterized by a low amount of free phosphate, a low amount of SGP-related substances and by a low amount of aluminum. The pharmaceutical composition is used in clinical nutrition, preferably in the preparation of nutritional formulations by compounding. The compositions can further be used for preventing or correcting phosphorus deficiency (hyperphosphatemia) in said adult or pediatric patients.

This invention relates to an apparatus and method for rapidly inhibiting nitrite-oxidizing bacteria to achieve deep nitrogen and phosphorus removal in urban wastewater, belonging to the field of biological wastewater treatment. The apparatus includes an influent reactor unit, an influent unit, an aeration unit, and an effluent unit. The method operates a short-cut nitrification / anaerobic ammonium oxidation system with low nitrogen and phosphorus removal efficiency due to the proliferation of nitrite-oxidizing bacteria in an anaerobic-aerobic-anoxic mode. By controlling the aerobic and anoxic time distributions, the nitrite accumulation rate in the aerobic section of the system is rapidly increased, reducing the total nitrogen and phosphate content in the effluent. This invention, by changing the operating mode, rapidly inhibits nitrite-oxidizing bacteria, improves the nitrogen and phosphorus removal efficiency of the short-cut nitrification / anaerobic ammonium oxidation system operating in an anaerobic-aerobic-anoxic mode, achieves deep nitrogen and phosphorus removal in urban wastewater with a low C / N ratio, and ensures stable operation. The operation and control are simple, requiring no external energy, thus saving energy and reducing consumption.

The application relates to the technical field of chemical analysis, in particular to a spectrophotometric determination method for phosphates in phosphorous acid, which comprises the following steps: adding a reducing agent to a sample to be measured to start a color reaction, synchronously triggering and performing double-wavelength high-frequency sampling, obtaining color light absorbance and background light absorbance at each moment during the whole determination process after the reaction is started; performing smoothing processing on the color light absorbance, evaluating the change degree of the smoothed color light absorbance with time to represent the time sequence characteristics of the change of the reaction rate, obtaining the relative change rate at each moment, and identifying the observation end moment when the main color reaction ends and the matrix interference drift starts; determining the interference drift rate, combining the reaction time, and determining the cumulative interference absorbance representing the matrix interference drift; obtaining the net absorbance, and determining the phosphate content in the sample to be measured. The application significantly improves the accuracy of the determination of trace phosphates in phosphorous acid.