26 results about "Biochemical oxygen demand" patented technology

The utility model discloses a pharmaceutical wastewater treatment system which comprises a pretreatment module, an A < 2 > O treatment module, a Fenton oxidation module and a recovery module, the Fenton oxidation module and the pretreatment module are both communicated with the A < 2 > O treatment module, and the recovery module is communicated with the Fenton oxidation module; the A2O treatment module comprises a hydrolysis acidification tank, an anaerobic tank, a denitrification tank, an aerobic tank and a sedimentation tank; the Fenton oxidation module comprises a Fenton buffer tank, integrated Fenton equipment and a Fenton clean water tank; the combined treatment process of the pretreatment module, the A2O treatment module and the Fenton oxidation module is lower in cost compared with other processes which are mainstream adopted at present, organic matters in wastewater can be converted into methane, carbon dioxide, water, hydrogen sulfide, ammonia and the like under the action of microorganisms, and an aerobic treatment method is adopted, so that the wastewater treatment efficiency is improved. The BOD (biochemical oxygen demand) removal rate is higher than that of a traditional activated sludge method, the sludge yield is small, the treatment effect is better, residual organic matters in the wastewater can be removed through strong oxidation of the Fenton reaction, and the quality of discharged water is guaranteed.

The invention relates to the technical field of sewage treatment, and discloses an environment-friendly efficient sewage treatment system which comprises a biochemical pool, an air pressure distribution execution unit, a load induction driving module and an aeration control module, the aeration control module obtains a torque pulsation parameter in the output current of the load induction driving module, calculates real-time liquid column static pressure in the biochemical pool by using a response model, and corrects the operation frequency according to the real-time liquid column static pressure so as to maintain a pressure difference interval in which the outlet pressure is higher than the real-time liquid column static pressure; the aeration control module determines the microorganism oxygen consumption rate according to the dissolved oxygen concentration attenuation slope in the operation switching stage, and then the duty ratio of the follow-up aeration pulse period is adjusted, real-time self-adaptive adjustment of the aeration pressure along with liquid level fluctuation is achieved, sewage backflow and invalid oxygen supply risks are effectively avoided, and the aeration efficiency is improved. The accurate adaptation of the aeration rate and the actual biochemical oxygen demand of microorganisms is ensured, and the treatment efficiency and the operation stability of the system are synergistically improved.

The invention provides a five-day biochemical oxygen demand sampling bottle, and belongs to the technical field of full-automatic analysis, the five-day biochemical oxygen demand sampling bottle specifically comprises a bottle body and a bottle cap, the bottle body is a dissolved oxygen bottle, a rotor is placed in the bottle body, the rotor is matched with a magnetic stirring device for use, a gas pipeline is nested on the bottle cap, and the upper end of the gas pipeline extends to the outer side of the bottle cap; the lower end of the gas pipeline extends to the bottle bottom, a self-locking pneumatic connector is arranged at the upper end of the gas pipeline, and the tripping end of the self-locking pneumatic connector is an aeration pipeline insertion opening. A honeycomb-shaped gas outlet head is arranged at the lower end of the gas pipeline, a first one-way valve is arranged in the middle of the gas pipeline and points to the inside of the bottle body, a through vent hole is formed in the bottle cap, and a second one-way valve is arranged in the vent hole and points to the outer side of the bottle body. According to the processing scheme, the labor cost is remarkably reduced, the personal error is reduced, and a solid foundation is laid for the accuracy and reliability of the BOD5 analysis result.

The application 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 organosilicon nano coating on the electrode surface of a dissolved oxygen sensor of a full-automatic BOD5 analyzer to obtain a fluorine-silicon modified dissolved oxygen sensor; pretreating the sewage to be detected in an adsorption column composed of modified activated carbon and porous silica gel to obtain a pretreated water sample; fixing bacillus subtilis on a porous carrier and then putting the carrier into the pretreated water sample to obtain an inoculated water sample; measuring the initial dissolved oxygen of the inoculated water sample and the end-point dissolved oxygen after 5-day culture; and obtaining the five-day biochemical oxygen demand in the sewage according to the initial dissolved oxygen and the end-point dissolved oxygen. Through the four-level collaborative system of "sensor anti-interference optimization, sample purification and enrichment, microbial reaction standardization and accurate signal acquisition", the application systematically eliminates the error sources in the traditional BOD5 detection, and realizes the accurate measurement of the organic matter pollution level in complex sewage.

The application relates to the technical field of sewage treatment, and discloses a sewage treatment process method based on an improved target genetic algorithm optimized LSTM, which is characterized in that the process method comprises the following steps: step S1, sewage treatment data acquisition and pretreatment; step S2, sewage treatment process modeling based on an LSTM; and step S3, multi-target genetic algorithm optimization design. The method comprehensively considers multi-dimensional performance indexes such as reaction time, energy consumption and biogas yield of a sewage treatment system, takes the emission standards of chemical oxygen demand (COD), biochemical oxygen demand (BOD), ammonia nitrogen (NH3-N), total nitrogen (TN) and total phosphorus (TP) as constraints, and realizes intelligent and multi-target optimal configuration of sewage treatment process operation parameters.

This invention discloses a system, method, and reagent kit for detecting biochemical oxygen demand (BOD) in wastewater, belonging to the field of environmental monitoring technology. The detection system of this invention includes at least two independent detection channels and a signal processing module. Each detection channel independently includes an enzymatic conversion module, which contains hydrolytic enzyme systems, oxidoreductase systems, and coenzyme NAD for specific types of organic matter. + The signal transduction and amplification module includes a CRISPR-Cas effector protein, a fluorescent reporter probe, and a molecular switch. The signal processing module detects the fluorescence signal intensity of each detection channel and converts the fluorescence signal into the biochemical oxygen demand (BOD) contribution value of each detection channel based on a pre-stored standard curve, summing them to obtain the total BOD. This invention effectively overcomes the detection uncertainty caused by fluctuations in microbial activity and differences in substrate degradation rates in traditional methods, significantly shortening the detection cycle to within 30 minutes.

The utility model relates to the technical field of BOD (Biochemical Oxygen Demand) monitoring, and discloses a pretreatment device for online BOD monitoring, the pretreatment device for online BOD monitoring comprises a support base, a storage box, a filter box, an impurity removal box and an impurity removal screen plate, the storage box is fixedly arranged at the upper end of the support base, the filter box is fixedly arranged at the upper end of the storage box, and the impurity removal screen plate is fixedly arranged at the lower end of the filter box. An impurity removing box is fixedly arranged at the upper end of the filtering box, a transition frame is fixedly arranged at the upper end of the impurity removing box, a feeding groove is fixedly formed in the upper end of the transition frame, and a conveying motor is fixedly arranged at one end of the impurity removing box. According to the pretreatment device for online BOD monitoring, the pretreatment device is improved, so that the impurity removing and filtering capacity of the pretreatment device is improved, in the actual use process of the pretreatment device, an online BOD monitoring water source can be subjected to impurity removing treatment according to needs, filtering of the online BOD monitoring water source is facilitated, and the practicability of the pretreatment device is improved. The treatment effect of the pretreatment device for online BOD monitoring is improved.

This utility model discloses a laboratory device for measuring the biochemical oxygen demand (BOD) of water, including a reaction container. The reaction container has a top cover and a drain outlet at its bottom. A stirring motor is located in the middle of the upper part of the top cover, and an inlet pipe is installed on the upper part of the top cover next to the stirring motor. A control box is located on one side of the reaction container. An oxygen sensor is located at the lower end of a temperature control module. Aerators are also embedded on both sides of the drain outlet at the bottom of the reaction container. The device offers rapid and timely measurement: Real-time monitoring of dissolved oxygen concentration changes using an oxygen sensor, combined with an efficient data acquisition and processing module, allows for rapid calculation of the BOD value, significantly shortening the measurement time. The device provides accurate and reliable results: A high-precision temperature control module, an accurate oxygen sensor, and a scientific data processing algorithm together ensure the accuracy and reliability of the measurement results.

The invention relates to the technical field of aquaculture, in particular to an ecological engineering regulation and control method for improving the quality of sea cucumbers in an argillaceous bottom salt pan, which comprises the following steps: establishing a salt pan argillaceous bottom sea cucumber pond, and configuring culture equipment according to the area of the salt pan argillaceous bottom sea cucumber pond; according to the data of the salt pan muddy bottom sea cucumber pond, a fermented compound microbial agent is put, organic matters in the bottom mud of the salt pan muddy bottom sea cucumber pond are decomposed, and a sea cucumber-algae-shellfish multi-nutrition hierarchical comprehensive culture system is constructed; the culture density is planned according to a sea cucumber-algae-shellfish multi-nutrition-level comprehensive culture system, and the salt pan muddy bottom sea cucumber pond environment is optimized. Aiming at the ecological characteristics of the argillaceous salt field, the method systematically improves the substrate environment, optimizes the micro-ecology of the water body, effectively reduces the biochemical oxygen demand of the bottom mud, increases the dissolved oxygen, reduces the water changing frequency, remarkably improves the quality of the sea cucumbers, and realizes the ecological, high-quality and high-valued cultivation of the sea cucumbers in the argillaceous salt field.

The present invention aims to provide an efficient cultivation technique for Aspergillus oryzae using a liquid component derived from milk. [Solution] A method for producing a culture of Aspergillus oryzae, comprising decomposing lactose in a milk-derived liquid component containing lactose to produce glucose and galactose, or, after producing glucose and galactose, adding Aspergillus oryzae and culturing, and separating the culture from the culture medium. A method for purifying wastewater, comprising decomposing lactose in a milk-derived liquid component containing lactose, which is wastewater, to produce glucose and galactose, or, after producing glucose and galactose, adding Aspergillus oryzae and culturing, and separating the culture from the culture medium to obtain a liquid phase in which at least one of the biochemical oxygen demand and the soluble chemical oxygen demand is 6000 mg / L or less.

The invention relates to the field of environmental monitoring, in particular to a prepared seawater biochemical oxygen demand standard substance and a preparation method and application thereof. Pollution-free natural seawater is subjected to reverse osmosis and ion supplementation to prepare seawater which serves as a standard substance matrix, glucosamine hydrochloride serves as a single organic standard substance, and a segmented linear relation between a BOD5 biological reaction coefficient alpha (r) and a proportion r under different glucose / glutamic acid mass ratios is established. And deducing a conversion formula between the glucosamine hydrochloride and glucose + glutamic acid, determining the dosage of the glucosamine hydrochloride, dissolving the glucosamine hydrochloride in prepared seawater, adding a borax buffer agent, subpackaging, and carrying out heat sealing to obtain the standard substance for seawater BOD5 determination and quality control. The method solves the problems of low recovery rate, complicated configuration, lack of a unified conversion method and the like of the existing pure water matrix standard substance in seawater.

The invention relates to the technical field of copper-nickel alloy surface treatment, in particular to a copper-nickel alloy pipe natural film forming method and a detection method. The natural film forming method for the copper-nickel alloy pipe comprises the steps that the copper-nickel alloy pipe is washed in seawater for preset time, and an oxidation film is formed on the surface layer of the copper-nickel alloy pipe; the seawater should meet the following conditions: the sulfate reducing bacteria is less than 1cfu / 10ml; the biochemical oxygen demand is less than 2mg / L; the total suspended matter is less than 2.5 mg / L. The natural film forming method and the detection method for the copper-nickel alloy pipe have the advantages that an initial surface in a good state is formed on the surface of a material, a good protection layer is formed, the material is prevented from being corroded, the surface treatment process is simplified, the working procedures are reduced, a large amount of manpower, material resources and financial resources are saved, and the cost is reduced; and pitting corrosion and corrosion phenomena of the copper-nickel alloy pipe in seawater are avoided, and the service life is prolonged.

The invention relates to the technical field of urban water treatment, and discloses an urban water control optimization treatment method, device and equipment and a storage medium. Based on a plurality of water control engineering measures, an improved Latin hypercube sampling method is utilized to obtain a plurality of engineering combination samples; the defect of insufficient space coverage rate of a plurality of generated engineering combination samples can be reduced; then acquiring investment data of each engineering combination sample, biochemical oxygen demand concentration data of sewage entering a plant, carbon emission intensity per unit water volume and carbon emission intensity per unit pollutant reduction through a simulation evaluation method, so as to facilitate accurate quantification of each water control engineering measure; the carbon emission intensity per unit water volume and the carbon emission intensity per unit pollutant reduction are integrated as optimization objectives, a multi-objective optimization model is constructed, Pareto frontier processing is carried out by using a multi-objective optimization algorithm, and the situation that the total amount is low but pollution control is weak in an optimization result is avoided on the basis of ensuring that the optimization result conforms to a low-carbon index.

This application relates to the field of water sample analysis equipment technology, and in particular to a fully automated biochemical oxygen demand (BOD) analyzer, comprising: two placement boxes with temperature control units; multiple placement plates, which are horizontally arranged and connected to the inner cavity of the placement boxes; multiple bottle holders, which are placed on the top wall of the placement plates; a sample processing control unit, forming a parameter processing control area; a sample dilution unit, forming a concentration dilution area; a bottle capping unit, forming a bottle cap placement area; an Oxygen Demand (OD) detection unit, forming an OD detection area; and two bottle holder moving units, which are connected to the placement boxes and can be connected to the bottle holders to move the bottle holders between the top wall of the placement plates and the parameter processing control area, the concentration dilution area, the bottle cap placement area, or the OD detection area. This application has the effect of reducing the workload of personnel in the process of biochemical oxygen demand (BOD) detection and ensuring the accuracy of the test results.

The invention provides automatic pretreatment equipment for five-day biochemical oxygen demand, which belongs to the technical field of full-automatic analysis and comprises a control system as well as an auxiliary equipment box body and an aeration cavity which are respectively connected with the control system, the auxiliary equipment box comprises a waste liquid box, a waste liquid collecting tank and an air pump set, the waste liquid collecting tank is located at the bottom of the aeration cavity, one end of the air pump set is communicated with the outside atmosphere, and the other end of the air pump set is connected with the aeration cavity through a gas pipeline; the aeration cavity comprises a cavity door, a first air distributor, an air conditioner, a winding pipe type heat exchanger, an aeration device and a sample tray, the air conditioner and the sample tray are located at the top and the bottom of the aeration cavity respectively, the winding pipe type heat exchanger is located at an air outlet of the air conditioner, and the aeration device is located above the sample tray; the aeration device, the winding pipe type heat exchanger, the gas pipeline and the gas pump set are sequentially connected, the first gas distributor is located on the gas pipeline, and the pretreatment automation degree and the sample aeration efficiency are improved.

This application provides a diagnostic method and equipment for anaerobic / aerobic processes in a biochemical unit, relating to the field of petroleum and petrochemical wastewater treatment. The method includes: calculating the chemical oxygen demand (COD), biochemical oxygen demand (BOD), and total nitrogen (TNO) removal rates based on the COD, BOD, and TNO values ​​of the influent and effluent of the biochemical unit; obtaining the process treatment efficiency based on the COD, BOD, and TNO removal rates; determining whether the process treatment efficiency is less than a first threshold; if so, obtaining the process parameters for each reactor; determining whether the process parameters match a preset parameter range; if not, obtaining and outputting diagnostic results based on the mismatched process parameters. This method accurately determines the impact of adjustments on the process unit and the actual operating status of the process unit, enabling the identification of process design defects and providing optimization directions through process parameter analysis, saving adjustment time and improving work efficiency.

The utility model relates to the technical field of water treatment, in particular to a testing head protection device of a BOD (Biochemical Oxygen Demand) tester, which comprises the BOD tester, a positioning component and a sealing component, the top of the BOD tester is connected with the positioning component in a sliding manner, and the sealing component is arranged at the bottom of the positioning component; the positioning assembly comprises a pressing plate, the bottom of the pressing plate is connected with a sleeve rod through a bolt, the BOD tester is connected with the sleeve rod in a sleeved mode, one end of the sleeve rod is connected with a limiting block through a bolt, and the position, located between the limiting block and the pressing plate, of the periphery of the sleeve rod is connected with a compression spring in a sleeved mode. The auxiliary positioning protection mechanism is additionally arranged, auxiliary protection treatment is carried out on the test head while the test head is rapidly inserted into the culture bottle in a pressing and positioning mode, and after the test head is used, the test head can be recycled to reduce exposure in the air, so that the safety and the stability in use are improved, and the use effect is improved.

The invention relates to the technical field of biological pharmacy, in particular to a method for extracting heparinoid from heparin sodium alcohol precipitation alcohol, which comprises the following steps: S1, pretreatment: filtering the collected heparin sodium alcohol precipitation alcohol to obtain clear filtrate; s2, concentration: concentrating the clarified filtrate in a reduced pressure distillation manner, and stopping distillation when the clarified filtrate is concentrated to 1 / 5-1 / 3 of the original volume to obtain a concentrated solution; s3, precipitation: slowly adding acetone into the concentrated solution while stirring, and precipitating and separating out the heparinoid to obtain a solid-liquid mixture. According to the method, a large amount of waste alcohol precipitation alcohol generated in the heparin sodium production process is deeply developed, the heparinoid product with the high additional value is extracted, waste of heparinoid resources is greatly reduced, and the economic benefits of enterprises are improved; meanwhile, organic substances in the waste liquid are recycled, so that the chemical oxygen demand of the discharged waste liquid is effectively reduced, the subsequent sewage treatment cost is reduced, and good environmental benefits are achieved.

An eFuels plant and process for producing synthetic hydrocarbons using renewable energy are disclosed. The eFuels plant comprises a hydrocarbon synthesis (HS) system and a renewable feed and carbon / energy recovery (RFCER) system. A process for treating wastewater in the eFuels production system comprises adding wastewater streams from the HS system to an anaerobic buffer tank to produce an inventory of untreated wastewater. The relative amounts of the HS system wastewater streams are controlled such that the inventory of untreated wastewater has a target chemical oxygen demand (COD) and / or a target biochemical oxygen demand (BOD). A first amount of the inventory of untreated water is added to an anaerobic biodigester to produce a first treated water stream and a biogas stream, and a second amount of the inventory of untreated water and the first treated water stream are added to an aerobic buffer tank to produce an inventory of aerobic feed water. The relative amounts of the first treated water and the untreated water added to the aerobic buffer tank such that the inventory of aerobic feed water are controlled such that the inventory of aerobic feed water has a target COD and / or a target BOD. A portion of the inventory of aerobic feed and an amount of air to an aerobic biodigester to produce a second treated water stream and a first sludge.

The invention belongs to the technical field of microbial fuel cells, and relates to a BOD (Biochemical Oxygen Demand) biosensor based on a microbial fuel cell and application of the BOD biosensor. Comprising a reaction chamber, an anode and a cathode, the anode and the cathode are arranged in the reaction chamber, the anode is a biological anode, the biological anode comprises a carbon felt and a biological membrane coated on the surface of the carbon felt, and the biological membrane is formed by bacillus cereus. A new biological anode is formed by screening microorganisms and a carbon anode, and the comprehensive performance of the sensor is fundamentally improved through coupling of a biological membrane structure, an anode microstructure and electrochemical performance of the biological anode; therefore, the BOD biosensor based on the biological anode has high stability, high sensitivity and good environmental adaptability, and application of the BOD biosensor in complex water environments such as industrial wastewater and estuary is facilitated.

A method for reducing a toxicity of wastewater, including: selecting a working electrode based on a biochemical oxygen demand to chemical oxygen demand (B / C) ratio of the wastewater; constructing a microbial electrochemical system using the graphite rod or the biochar / MoS2-modified graphite rod as the working electrode; adding a culture solution including the wastewater, sediment, a phosphate buffer solution, and a carbon source to the microbial electrochemical system, cultivating and enriching an electroactive biofilm on the surface of the working electrode in the microbial electrochemical system using chronoamperometry, and periodically refreshing the culture solution until the electroactive biofilm reaches a stable and mature state; and after formation of the electroactive biofilm, introducing the wastewater into the microbial electrochemical system with a matured electroactive biofilm, applying an external voltage to the working electrode, and operating the microbial electrochemical system under intermittent polarization switching between open-circuit and closed-circuit modes.

The present application relates to a kind of biochemical oxygen demand online prediction method of thermal power plant sewage treatment, comprising: determining the main parameter of influencing biochemical oxygen demand as auxiliary variable;Dimension reduction processing is carried out;Using the auxiliary variable after dimension reduction as input variable, using improved case reasoning method to carry out the case matching of biochemical oxygen demand soft measurement model, using nearest neighbor search strategy to carry out the case adjustment of biochemical oxygen demand soft measurement model, establish biochemical oxygen demand soft measurement model;Collecting thermal power plant sewage treatment data input biochemical oxygen demand soft measurement model and training learning;The data to be predicted of thermal power plant sewage treatment is input into trained biochemical oxygen demand soft measurement model, and the prediction value of biochemical oxygen demand is output.The present application uses RBF neural network to carry out dimension reduction processing to auxiliary variable, reduce the time and space complexity of system calculation;Effectively improve the prediction accuracy of biochemical oxygen demand, with good real-time online prediction effect.

The utility model discloses a kind of ship sewage discharge intelligent monitoring devices, it is related to ship field, it includes sewage storage tank, sewage treatment mechanism, acquisition ship data and control ship sewage discharge main control system, responsible for storage and retransmission ship data and instruction cloud server platform and monitor ship data and send control instruction to main control system remote control subsystem, the sewage storage tank is equipped with liquid level meter, gas sensor, oil content meter and biochemical oxygen demand sensor, the sewage storage tank is connected with the sewage treatment mechanism by pipeline, the sewage treatment mechanism is connected with the main control system communication. The utility model has the advantages of high degree of intelligence, prevent sewage disorderly discharging.

The utility model discloses a special dissolved oxygen instrument electrode for BOD (Biochemical Oxygen Demand) and relates to the technical field of water body detection. The device comprises an electrode assembly, the electrode assembly comprises a probe, a thermosensitive electrode, a waterproof breathable film head and a shielding signal line, a fixed disc is arranged on the probe, a conical rubber seat is fixedly arranged on the lower surface of the fixed disc, and a U-shaped frame is fixedly arranged on the lower surface of the conical rubber seat; by arranging the stirring assembly, the stirring assembly is assembled at the bottom of the waterproof breathable film head, when the electrode assembly and the stirring assembly enter the dissolved oxygen bottle, a stirring rod in the stirring assembly stirs a water sample, so that the water sample generates a flowing effect for detection of the waterproof breathable film head, the thermosensitive electrode and the probe, and the detection precision of the water sample is improved; the conical rubber seat is arranged and seals the bottle opening of the dissolved oxygen bottle, so that external air is prevented from entering the dissolved oxygen bottle, oxygen in the air is prevented from being blended into a water sample to cause deviation, and the detection precision of the water sample is further improved.