15 results about "Treated water sample" patented technology

The invention relates to the technical field of water quality monitoring, and discloses a DOC spectrum monitoring method and device. Comprising the following steps: pre-treating a water sample through a filtering device to eliminate the interference of turbidity on spectrum detection; conveying the pretreated water sample into a detachable flow cell, and collecting an ultraviolet spectrum of the water sample through an independently arranged light source spectrometer; determining a target characteristic wavelength subset from the ultraviolet spectrum; inputting the target characteristic wavelength subset into a pre-trained integrated meta-model to obtain a predicted value of the DOC concentration in the water sample; wherein the integrated meta-model is constructed by adopting a Stacking strategy and comprises a plurality of base models and a meta-model, and the meta-model is used for learning prediction results of the base models and performing fusion output; according to the monitoring system state or the preset maintenance period, before the flow cell is disassembled and maintained, the backwashing unit is triggered to execute the pre-cleaning operation, and the technical scheme is provided which gives consideration to the installation convenience, the monitoring accuracy and the operation stability.

The invention relates to the technical field of sewage treatment, in particular to an ultraviolet irradiation and sodium hypochlorite synergistic sewage treatment process which specifically comprises the following steps: S1, performing light treatment on sewage by using an ultraviolet lamp, and controlling the ultraviolet dosage to be 15-25mJ / cm < 2 >, the wavelength of the ultraviolet lamp to be 254nm and the irradiation time to be 1-5min; s2, adding modified sodium hypochlorite into the sewage treated in the step S1 under the condition of not stopping illumination of the ultraviolet lamp to obtain a treated water body; s3, sodium thiosulfate is added into the water body obtained in the step S2, redundant chlorine elements in the water body are removed, and a finally-treated water sample is obtained. Through the synergistic effect of ultraviolet irradiation and modified sodium hypochlorite, the adding amount of sodium hypochlorite is reduced (the sodium hypochlorite can reach the standard only by 1 mg / L), meanwhile, the contact reaction time is shortened to 1 min, and the comprehensive energy consumption is reduced by 30%-40%. In addition, residual chlorine is accurately neutralized by sodium thiosulfate in a controlled amount, excessive medicament residues are avoided, and the green chemical process requirements are met.

The embodiment of the invention provides a softening resin performance monitoring method, water treatment equipment and a storage medium, and the method comprises the following steps: obtaining a first TDS value of a to-be-treated water sample, treating the water sample based on regenerated softening resin, obtaining a second TDS value of the softened water sample, determining the ratio of the first TDS value to the second TDS value, and determining the performance of the softening resin according to the ratio of the first TDS value to the second TDS value; and determining residual use data of the softening resin based on the change trend of the ratio. Whether the softening resin can be fully regenerated or not can be determined by detecting the TDS change trend of the water sample before and after regeneration treatment, so that whether the softening resin is invalid or not is reflected, the residual use data of the softening resin is obtained, a user is helped to timely determine whether the softening resin needs to be replaced or not, and normal use of water treatment equipment is ensured.

The invention discloses a method for low-cost treatment of maleic anhydride wastewater through a Fenton oxidation reaction, and belongs to the technical field of chemical engineering. The method comprises the following steps: measuring the pH value of the maleic anhydride wastewater, controlling the temperature at 45-55 DEG C, adding liquid caustic soda under the condition, adjusting the pH value to 3-3.5, adding a certain amount of a ferrous sulfate solution into the maleic anhydride wastewater with the adjusted pH value, uniformly mixing, adding a certain amount of a hydrogen peroxide solution, uniformly stirring, carrying out a Fenton reaction, keeping the ORP at 250mV or above in the Fenton reaction process, and filtering to obtain the maleic anhydride wastewater. The COD (Chemical Oxygen Demand) of the maleic anhydride wastewater before treatment is controlled to be 40000-50000 mg / L, and the COD of the treated water sample is controlled to be 20000-35000mg / L. According to the method, the proportion of Fenton reagents and pH influence factors are explored, the proportion of ferrous sulfate and hydrogen peroxide is explored, the dosing relation between the dosing amount of liquid caustic soda and the physicochemical properties of maleic anhydride wastewater is explored, cost accounting and comparison are carried out on the theoretical dosing amount and the actual dosing amount, and the purpose of treating maleic anhydride wastewater at low cost is achieved.

The invention provides a control method of a purified water dispenser, the purified water dispenser and a storage medium, the method is applied to the purified water dispenser, the purified water dispenser comprises a resin tank, a first valve and a reverse osmosis filter element which are sequentially communicated at a purified water pipeline, the purified water dispenser further comprises a water outlet branch and a second valve, and one end of the water outlet branch passes through the second valve and the first valve; one end of the water outlet branch is communicated with a water outlet of the resin tank, and the other end of the water outlet branch is communicated with a water outlet of the reverse osmosis filter element; the method comprises the following steps: acquiring a first TDS value of a treated water sample softened by a resin tank; when the first TDS value is larger than the TDS threshold value, the first valve and the second valve are controlled to be opened, and the treated water sample is conveyed to the water outlet of the reverse osmosis filter element through the water outlet branch. The method can prolong the service life of the reverse osmosis filter element.

This invention relates to the field of water treatment technology and discloses an intermittent electrocatalytic treatment method for trace estrogen in reclaimed water. The method is carried out in a three-dimensional electrode reactor. Before formal treatment, a pre-treated water sample containing the estrogen to be removed is used to pre-saturate the particle electrode. Subsequently, reclaimed water containing one or more estrogenic pollutants is continuously introduced into the reactor, operating at a current density of 1.0–10.0 mA / cm², a hydraulic retention time of 5–20 min, and an aeration rate of 0–3.0 L / min. An intermittent power supply mode with alternating power on and off is employed, wherein the ratio of power on time to power off time is 1:1, and the power off time is 2–120 s. During the power off phase, the estrogen to be removed accumulates on the surface of the particle electrode. During the power on phase, the particle electrode repolarizes to form a micro-battery and undergoes electrochemical oxidation in conjunction with the anode, causing direct oxidation and / or indirect oxidation mediated by an electrogenerated oxidant, while the particle electrode achieves in-situ regeneration. The method is applicable to the treatment of trace amounts of estrogens in reclaimed water, preferably one or more of estrone (E1), 17β-estradiol (E2), estriol (E3), 17α-ethinylestradiol (EE2), and bisphenol A (BPA). This invention can reduce the artificially inflated impact of adsorption on the evaluation of treatment effectiveness, and reduce energy consumption while ensuring treatment efficiency.

The utility model belongs to the technical field of environmental science, and particularly relates to a multi-channel automatic sampling system for measuring mercury in water, which is used for measuring mercury in water and comprises a plurality of sample bottles, a reagent bottle, an oxidation bottle, two multi-way valves, an injection pump, a reduction bottle, a mercury detector and a carrier gas system. The water sample of each sample bottle is connected by the first multi-way valve through a sample feeding pipe, and each reagent bottle and each oxidation bottle are connected by the second multi-way valve. The injection pump is connected with the second multi-way valve through the sampling pipe, and the sample outlet pipe feeds the mixture into the reduction bottle. The mercury detector is connected with the reduction bottle through a sample detection pipe, the carrier gas system is conveyed to the reduction bottle through a gas sample feeding pipe, a pre-treated water sample in the reduction bottle is purged, and reduced elemental mercury is brought out and enters the mercury detector. The system reliably realizes automatic sampling analysis and on-line monitoring of the total mercury and the form of the total mercury in water.

The invention relates to the technical field of data processing and water quality detection, and provides a signal processing method of a multi-parameter water quality analyzer and a related device, the method comprises the following steps: using a photoelectric detection module to obtain a first detection light signal generated when a to-be-treated water sample plate is subjected to laser irradiation; performing conversion processing on the first detection optical signal to obtain a first detection electric signal; optimizing the first detection electric signal to obtain a second detection electric signal; performing spectrum construction according to the second detection electric signal to obtain target spectrum information; and determining pollutant information of the to-be-treated water sample plate according to the target spectral information. By adopting the method provided by the invention, the accuracy of the signal processing process can be improved.

The invention provides a method for detecting biochemical oxygen demand in sewage, and belongs to the field of oxygen demand detection. The method comprises the following steps: forming a fluorine-containing organic silicon nano coating on the surface of an electrode of a dissolved oxygen sensor of a full-automatic BOD5 analyzer to obtain a fluorine-silicon modified dissolved oxygen sensor; the method comprises the following steps: pre-treating sewage to be detected in an adsorption column consisting of modified activated carbon and porous silica gel to obtain a pre-treated water sample; bacillus subtilis is fixed on a porous carrier and then put into the pretreated water sample, and an inoculated water sample is obtained; measuring the initial dissolved oxygen of the inoculated water sample and the final dissolved oxygen after five-day culture; and obtaining the five-day biochemical oxygen demand in the sewage according to the initial dissolved oxygen and the final dissolved oxygen. According to the application, through a four-stage collaborative system of sensor anti-interference optimization, sample purification and enrichment, microbial reaction standardization and accurate signal acquisition, error sources in traditional BOD5 detection are systematically eliminated, and accurate measurement of the organic matter pollution level in complex sewage is realized.

The invention discloses an impact mode diagnosis method, device and equipment of a wastewater treatment reactor and a storage medium, and relates to the technical field of wastewater treatment.The impact mode diagnosis method comprises the steps that a target wastewater treatment reactor is used for treating wastewater, and a treated water sample is obtained; the method comprises the following steps: determining water sample component organic matter content and water sample component alkalinity based on each treated water sample, collecting online data when each wastewater is treated, and then establishing a characteristic change fingerprint database based on each online data, the water sample component organic matter content and the water sample component alkalinity; training the initial deep learning model by using the feature change fingerprint database so as to output offline data based on the online data by using the obtained target deep learning model; and clustering the offline data and the online data by using a preset clustering algorithm so as to diagnose the impact mode of the target wastewater treatment reactor by using a target expert diagnosis system constructed based on a clustering result. This makes it possible to improve the efficiency of diagnosing the impact pattern of the wastewater treatment reactor.

The embodiment of the invention provides a regeneration control method and device, water treatment equipment and a storage medium, and the method comprises the following steps: treating a water sample based on a regenerated resin tank, obtaining a TDS value of the treated water sample after softening treatment, if the TDS value is greater than a TDS threshold value, representing that the salt content of soft water produced by the current resin tank is relatively high, and if not, representing that the salt content of the soft water produced by the current resin tank is relatively high, representing that the salt content of the soft water produced by the current resin tank is greater than the TDS threshold value. The execution parameters of the washing step in the regeneration treatment are determined based on the TDS value, the soft water valve is controlled again according to the execution parameters to execute the washing step of the resin tank, residual salt in the resin tank is washed away, and the quality of the softened water is ensured.

The invention discloses a liquid cathode glow discharge spectrum device and method for analyzing trace thallium. The device comprises a pretreatment unit, a separation and enrichment unit and a detection unit. The pretreatment unit is used for mixing a to-be-treated water sample with an oxidant and an acid solution to form a pretreated water sample; an enrichment column of the separation and enrichment unit comprises chelating resin, after the pretreated water sample enters the enrichment column, leacheate and an eluent are sequentially supplied to the enrichment column, and a water sample to be analyzed is obtained; and the detection unit receives the to-be-analyzed water sample for analysis and detection. According to the invention, high-selectivity chelate resin is used as an enrichment column filler, thallium ions in a pretreated water sample can be efficiently adsorbed, and other interfering ions can be separated; and after enrichment is completed, leacheate is supplied to the enrichment column, the pH environment of the enrichment column can be adjusted while interference ions are leached, and the thallium ions are effectively eluted under the assistance of a proper eluent, so that the interference problem of coexisting ions under a high-salt matrix is solved, the accuracy and sensitivity of analysis and detection are improved, and the device has the characteristics of miniaturization, low power consumption and high sensitivity.

This invention discloses a treatment process and system for residual organic wastewater from reverse flotation and subsequent desilication of demagnesium phosphate concentrate, belonging to the field of wastewater treatment technology. In the reverse flotation and subsequent desilication process of demagnesium phosphate concentrate, the filtrate from the desiliconized phosphate concentrate and tailings is collected and transported to a wastewater collection tank for mixing. An oxide mixture is added to the mixed wastewater and stirred until homogeneous. The mixture is then pumped sequentially into a two-stage series photo-ozone reactor to oxidize the organic matter in the wastewater. After the treated water sample meets the standards, it is returned to the phosphate rock flotation demagnesium removal process. The wastewater treatment system includes a wastewater collection tank, an oxide mixture addition tank, a mixing tank, a two-stage series photo-ozone reactor, and a qualified wastewater storage tower. This wastewater treatment process not only achieves efficient wastewater treatment without secondary pollution but also allows for reuse in the phosphate rock flotation demagnesium removal process, improving the practicality and stability of the wastewater treatment process and demonstrating promising application prospects.

The invention discloses a method for removing pollutants in a nanofiltration membrane concentrated solution through coagulating sedimentation and ultraviolet / heat synergistic activation of sodium persulfate, and belongs to the technical field of water pollution control. Aiming at a kitchen waste leachate nanofiltration membrane concentrated solution with large chroma, high salinity, high CODCr content, large change amplitude, high total nitrogen and total phosphorus content, low BOD5 and ammonia nitrogen content and low concentration of metal ions except magnesium, the invention discloses a treatment method combining coagulating sedimentation and an ultraviolet / thermal activation sodium persulfate advanced oxidation method. The method can effectively reduce TOC, TN, chromaticity and UV254 in a water sample and efficiently remove organic pollutants and coloring substances, the method shows excellent treatment capacity on TOC, chromaticity and other indexes, CODCr, BOD5, TN, ammonia nitrogen, TP and chromaticity indexes of the treated water sample can meet the emission standard, and the method is suitable for industrial production. And a reference technical strategy is provided for exploring a novel high-efficiency oxidation technology and deep purification of a membrane concentrated solution in the future.

The present invention provides a water quality monitoring system for farmland irrigation, belonging to the technical field of water quality monitoring and analysis, including: an environmental acquisition module: collecting environmental parameters of a farmland irrigation canal based on a preset sensor group to determine the time interval for collecting irrigation water samples; a water sample collection module: collecting irrigation water samples, and then obtaining a number of basic water samples and performing pre-treatment; a preliminary detection module: a multi-parameter preliminary detection step: performing a preliminary detection on the pre-treated water samples based on a preset water quality sensor; a targeted detection module: screening out possible characteristic pollutants based on the preliminary detection data and performing targeted detection; a water quality evaluation module: establishing a water quality evaluation model based on a preset algorithm, comprehensively evaluating the water quality of the irrigation water according to the model, judging whether the water quality meets the farmland irrigation standard and generating a water quality evaluation result. It reduces the workload of manual monitoring and improves the safety and sustainability of farmland irrigation.