Screening test device for rapidly screening carbon source in sewage treatment plant
By designing a screening test device consisting of a reaction flask, supporting pipelines, and a magnetic stirrer, the problem of wastewater treatment plants struggling to quickly screen cost-effective carbon sources was solved, achieving rapid and accurate carbon source screening and denitrification.
Patent Information
- Application Number
- CN202422953935.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-02
AI Technical Summary
In existing technologies, wastewater treatment plants have difficulty quickly and accurately screening for more cost-effective carbon sources, and traditional reactors have difficulty maintaining an oxygen-deficient environment, which affects the results of small-scale carbon source tests.
A screening test device was designed, including a reaction flask, a cap, a nitrogen inlet pipe, a carbon source dosing pipe, a sampling pipe, a magnetic rotor, and a magnetic stirrer. The nitrogen inlet pipe and the carbon source dosing pipe ensure an oxygen-deficient environment, the sampling pipe enables sampling at any time, and the magnetic stirrer ensures uniform stirring, thus achieving rapid screening.
This device enables convenient addition of carbon source reagents and on-demand sampling in an oxygen-deficient environment, allowing for rapid and accurate screening of more cost-effective carbon sources, reducing carbon source addition costs and improving denitrification efficiency.
Smart Images
Figure CN223611226U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sewage treatment technical field especially relates to a screening test device for sewage treatment plant quick screening carbon source. BACKGROUND
[0002] Total nitrogen in sewage is one of main substances causing water environment pollution, and the discharge requirement of TN of effluent of urban sewage treatment plant is also higher and higher, and some local standards require TN is less than or equal to 10 (12) mg / L. And the actual influent C / N of most urban sewage is low, and there is not enough carbon source required by denitrification, which limits the denitrification effect. Therefore, adding external carbon source has become the main way to solve the problem of TN reaching standard in sewage plant.
[0003] The commonly used external carbon source at present mainly has methanol, sodium acetate, glucose, compound carbon source etc., and although methanol and sodium acetate have good denitrification effect, methanol is flammable and explosive dangerous goods, and there are safety problems in the process of transportation and use; the adding cost of sodium acetate is high, and the cost performance is low. The glucose carbon chain is long, and the denitrification rate is slow. Therefore, more and more sewage plants select to add compound carbon source. But the compound carbon source is various in type, different in composition, and uneven in quality. How to quickly and accurately screen out the carbon source with better cost performance becomes the key to solve the problems of high carbon source adding cost and low denitrification efficiency in sewage plant.
[0004] The sewage plant screening carbon source is generally through carbon source pilot test to compare different carbon sources. The key to success of denitrification pilot test is to keep the anoxic environment in the reaction container. At present, most of them use beaker as reactor to carry out carbon source pilot test, but the beaker is open, and it is not convenient to maintain the anoxic environment of denitrification, in addition, it is not convenient to add carbon source medicament and take sample at different reaction times, and oxygen is easily brought in during the process, and the anoxic environment is destroyed. Therefore, how to provide a screening test device for screening carbon source in sewage plant, which can conveniently carry out carbon source pilot test, and quickly and accurately screen out the carbon source with higher cost performance is a problem to be solved.
[0005] Therefore, the utility model is proposed. UTILITY MODEL CONTENT
[0006] The utility model aims at providing a screening test device for sewage treatment plant quick screening carbon source, which can conveniently, quickly and accurately screen out the carbon source with higher cost performance, and further solve the above technical problems existing in the prior art.
[0007] The utility model aims at realizing the following technical scheme:
[0008] A screening test device for sewage treatment plant quick carbon source screening, comprising:
[0009] The reaction bottle, bottle cap, nitrogen inlet pipe, carbon source adding pipe, sampling pipe, magnetic rotor, magnetic stirrer and sampling valve are arranged in the reaction bottle.
[0010] The upper end of the reaction bottle is provided with an opening.
[0011] The bottle cap is screwed and sealed on the opening of the reaction bottle.
[0012] The nitrogen inlet pipe and the carbon source adding pipe are arranged in the reaction bottle through the bottle cap, and the lower end of the nitrogen inlet pipe is located at the bottom of the reaction bottle.
[0013] The reaction bottle is arranged on the magnetic stirrer, and the magnetic rotor is arranged at the bottom of the reaction bottle.
[0014] The sampling pipe is arranged at the middle and lower part of the reaction bottle and is in communication with the reaction bottle, and the sampling valve is arranged on the sampling pipe.
[0015] Compared with the prior art, the screening test device for quickly screening carbon sources in a sewage treatment plant has the beneficial effects that:
[0016] The reaction bottle with the opening at the upper end is relatively sealed, so that the denitrification anoxic environment can be maintained during the carbon source pilot test, the nitrogen inlet pipe and the carbon source adding pipe penetrating through the bottle cap and the sampling pipe arranged on the side of the bottle body can facilitate the addition of carbon source medicaments into the bottle and the sampling and detection of the denitrification and nitrogen removal effect at any time, and a more suitable device support is provided for the sewage plant to screen the carbon source with higher performance price ratio. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0018] Figure 1 The structure diagram of the screening test device for quickly screening carbon sources provided by the embodiments of the present application is shown.
[0019] The symbols in the figure are as follows: 1 - reaction bottle; 2 - bottle cap with hard tube; 3 - nitrogen inlet tube; 4 - carbon source feeding tube; 5 - nitrogen valve; 6 - feeding valve; 7 - sampling tube; 8 - sampling valve; 9 - magnetic rotor; 10 - magnetic stirrer; 11 - switch; 12 - adjusting knob; 13 - speed display screen. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, which do not constitute a limitation on the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.
[0021] First, the terms possibly used in the present text are explained as follows:
[0022] The term "and / or" means either one or both, for example, X and / or Y means three cases including "X", "Y" or "X and Y".
[0023] The terms "include", "contain", "have", "possess" or other similar semantic descriptions should be interpreted as non-exclusive inclusion. For example, the inclusion of a technical feature element (such as raw materials, components, ingredients, carriers, dosage forms, materials, sizes, parts, components, mechanisms, devices, steps, processes, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or articles, etc.) should be interpreted as not only including the explicitly listed technical feature element, but also including other technical feature elements not explicitly listed in the art.
[0024] The term "consisting of" means excluding any technical feature element not explicitly listed. If this term is used in the claims, the term will make the claim closed, so that it does not contain technical feature elements other than the explicitly listed technical feature elements, except for conventional impurities related thereto. If the term only appears in a certain clause of the claim, it is only limited to the elements explicitly listed in that clause, and the elements described in other clauses are not excluded from the overall claim.
[0025] Unless otherwise defined, the terms "mounting", "connected", "connecting", "fixed", and the like are to be construed broadly in accordance with the principles of the present application, for example, it can be fixed connection, or detachable connection, or integrally connected, or mechanical connection, or electrical connection, or direct connection, or indirect connection through an intermediate medium, or internal communication of two elements, and the specific meaning of the above terms in this article can be understood according to the specific circumstances by those skilled in the art.
[0026] The orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplification of description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as a limitation on this article.
[0027] The scheme provided by the present application will be described in detail below. The contents not described in detail in the embodiments of the present application belong to the prior art known to those skilled in the art. If no specific conditions are specified in the embodiments of the present application, the conditions are performed according to the conventional conditions in the art or the conditions recommended by the manufacturer. If no manufacturer of the reagent or instrument used in the embodiments of the present application is specified, it is a conventional product that can be purchased on the market.
[0028] As shown in Figure 1 The present application provides a screening test device for rapid carbon source screening in sewage treatment plant, which can ensure that the anoxic environment is maintained during the carbon source pilot test, and facilitates the addition of carbon source medicament and the sampling and detection of denitrification effect at any time, so as to quickly screen out carbon sources with higher cost performance, thereby reducing the carbon source addition cost of sewage treatment plant while meeting the denitrification effect. The screening test device comprises:
[0029] The reaction bottle, the bottle cap, the nitrogen inlet pipe, the carbon source adding pipe, the sampling pipe, the magnetic rotor, the magnetic stirrer and the sampling valve; wherein,
[0030] The upper end of the reaction bottle is provided with an opening;
[0031] The bottle cap is tightly sealed on the opening of the reaction bottle by screwing;
[0032] The nitrogen inlet pipe and the carbon source adding pipe are arranged in the reaction bottle through the bottle cap, the lower end of the nitrogen inlet pipe is located at the bottom of the reaction bottle, and the drug outlet of the carbon source adding pipe is located above the liquid level in the reaction bottle;
[0033] The reaction bottle is arranged on the magnetic stirrer, a magnetic rotor is arranged at the bottom of the reaction bottle, and the magnetic rotor can stir the sludge-water mixture in the reaction bottle under the driving of the magnetic stirrer.
[0034] The sampling pipe is arranged at the middle and lower part of the reaction bottle and communicates with the reaction bottle, and a sampling valve is arranged on the sampling pipe.
[0035] Preferably, the screening test device further comprises a nitrogen valve and a carbon source adding valve.
[0036] The nitrogen valve is arranged on the nitrogen inlet pipe.
[0037] The carbon source adding valve is arranged on the carbon source adding pipe.
[0038] Preferably, in the screening test device, the nitrogen inlet pipe is composed of a hard pipe section and a soft pipe section, the hard pipe section is arranged in the reaction bottle through the bottle cap, and the soft pipe section is connected with the hard pipe section.
[0039] Preferably, in the screening test device, the carbon source adding pipe is composed of a hard pipe and a soft pipe, and the hard pipe is arranged in the reaction bottle through the bottle cap.
[0040] Preferably, in the screening test device, the reaction bottle is a bottle body with a scale, so that the amount of the sludge-water mixture in the reaction bottle can be conveniently and directly determined.
[0041] Preferably, in the screening test device, the volume of the reaction bottle is 1-2 L.
[0042] Preferably, in the screening test device, the sampling pipe is arranged at the side of the upper one-third of the bottle body from the bottom of the reaction bottle.
[0043] Preferably, in the screening test device, the magnetic stirrer is a magnetic stirrer provided with a switch, an adjusting knob and a speed display screen, so that the speed can be conveniently controlled and adjusted.
[0044] As can be seen from the above, the screening test device has at least the following beneficial effects compared with the prior art:
[0045] (1) The nitrogen inlet pipe and the carbon source adding pipe are arranged, so that nitrogen can be conveniently introduced and carbon source reagent can be conveniently added before the test reaction, the nitrogen valve and the carbon source adding valve are closed during the reaction process, the dissolved oxygen in the mixture can be removed, the initial mixture can reach an anoxic environment, and good reaction conditions are created for denitrification.
[0046] (2) By setting up a sampling tube, the valve can be opened at any time during the reaction process to take samples. The sampling process does not require opening the cap and will not introduce oxygen to disrupt the hypoxic environment. It is also convenient to operate.
[0047] (3) The carbon source screening device is reasonably and practically designed and easy to operate. It can provide good reaction conditions for small-scale carbon source screening tests. Combined with the carbon source screening method, it can quickly and accurately screen out the carbon source with the best cost performance, and reduce the carbon source addition cost of sewage treatment plants while meeting the denitrification effect.
[0048] To more clearly demonstrate the technical solution and its effects provided by this utility model, the following detailed description of the solution provided by the embodiments of this utility model is given with reference to specific examples.
[0049] Example 1
[0050] For the biochemical system of a wastewater treatment plant, three different carbon sources (A, B, and C) will be selected for a comparative screening test. A is sodium acetate, while B and C are both composite carbon sources. Specific information about the carbon sources to be screened is shown in the table below.
[0051] Table 1. Information on carbon sources to be screened
[0052]
[0053] (1) Screening test device for rapid screening of carbon sources
[0054] The following screening test apparatus is used, including: a reaction flask 1, a flask cap with a rigid tube 2, a nitrogen inlet pipe 3 and a nitrogen valve 5, a carbon source dosing pipe 4 and a dosing valve 6, a sampling pipe 7 and a sampling valve 8, a magnetic rotor 9, and a magnetic stirrer 10. The magnetic stirrer 10 is equipped with a switch 11, an adjustment knob 12, and a speed digital display screen 13.
[0055] The reaction flask 1 is graduated, and its volume can be 1-2L. In this embodiment, the reaction flask 1 has a volume of 1L and is used to hold the prepared mud-water mixture. The mud-water mixture used in the experiment is taken from the end of the aerobic tank. Potassium nitrate can be added to increase the nitrate nitrogen to 20-30 mg / L. In this embodiment, potassium nitrate is added to increase the nitrate nitrogen to 25 mg / L. The magnetic rotor 9 is located at the bottom of the reaction flask 1. The magnetic stirrer 10 located at the bottom of the reaction flask 1 drives the magnetic rotor 9 to stir the mud-water mixture in the reaction flask 1, ensuring that the mud-water mixture is stirred evenly and improving the mass transfer effect.
[0056] The reaction bottle 1 is provided with a bottle cap 2 through which a pipeline can be passed, the bottle cap 2 can be screwed onto the upper end opening of the reaction bottle, and the nitrogen inlet pipe 3 and the carbon source adding pipe 4 are passed through the bottle cap 2. The nitrogen inlet pipe 3 is a combination of a hard pipe section and a soft pipe section, the lower end of the hard pipe section extends into the bottom of the reaction bottle 1, and the upper end is connected with the soft pipe section for passing nitrogen, so that nitrogen can be passed into the reaction bottle 1 before the test reaction to remove the dissolved oxygen in the sludge-water mixture. The carbon source adding pipe 4 is a combination of a hard pipe and a soft pipe, the lower end of the hard pipe extends into the reaction bottle 1 above the liquid level, and a pipette or a pipette gun can be used to add carbon source reagent through the carbon source adding pipe 4. Nitrogen valves 5 and adding valves 6 are respectively arranged on the nitrogen inlet pipe 3 and the carbon source adding pipe 4, and after the nitrogen is passed and the carbon source reagent is added, the nitrogen valves 5 and the adding valves 6 can be closed to isolate oxygen, so as to avoid the introduction of oxygen into the reaction bottle 1 during the reaction process and ensure the anoxic environment in the denitrification process. If exhaust is needed, a soft pipe can be connected to the upper end of the carbon source adding pipe 4 and passed into pure water for exhaust.
[0057] The reaction bottle 1 is provided with a sampling pipe 7, the sampling pipe 7 is arranged on the side of the bottle body in the upper one-third from the bottom, and a sampling valve 8 is arranged on the sampling pipe 7, so that the sampling valve 8 can be opened at any time during the reaction process for sampling detection, and the sampling valve 8 can be closed after sampling. During the sampling process, the bottle cap 2 does not need to be opened, oxygen is not introduced to destroy the anoxic environment, and the operation is also convenient.
[0058] The magnetic stirrer 10 is a magnetic stirrer provided with a switch 11, an adjusting knob 12 and a rotating speed digital display screen 13. When multiple carbon sources are compared, the rotating speed digital display screen 13 can keep the rotating speed of each device consistent, so as to eliminate the influence of inconsistent rotating speed on the reaction stirring conditions.
[0059] (2) The specific steps for screening carbon sources are as follows:
[0060] Step 1: Measure the COD equivalent of the three carbon sources to be compared in advance. Take 4L of mixed liquid at the end of the aerobic tank and place it in a cool place for standby, and after sedimentation, wash the mud once with distilled water. After washing the mud, measure the DO, pH and water temperature of the mixed liquid, and take a sample, filter it with filter paper and detect the COD and nitrate nitrogen concentration of the water sample.
[0061] Step 2: According to the nitrate nitrogen concentration of the mixed liquid detected in step 1, add potassium nitrate to the mixed liquid to increase the nitrate nitrogen of the mixed liquid to 25mg / L, and use it as the mixed liquid for the small test. After the small test mixed liquid is prepared, take a sample, filter it with filter paper and detect the nitrate nitrogen concentration. This is used as the initial concentration of nitrate nitrogen.
[0062] Step 3: The screening test device was used to screen 3 groups of carbon sources. 1L of the mixed solution was taken from the test device reaction bottle and numbered 1#, 2# and 3# respectively. The lid was closed and nitrogen was introduced to remove dissolved oxygen in the mixed solution. After the nitrogen was introduced, the valve on the carbon source feeding pipe was closed to isolate air. The test was ready for use.
[0063] Step 4: According to the initial nitrate nitrogen concentration, the required nitrate nitrogen concentration was set. The valve on the carbon source feeding pipe was opened, and A, B and C carbon sources were added to the reaction bottles at a carbon-nitrogen ratio of 5:1. After the carbon source was added, the valve was immediately closed. The magnetic stirrer was started and the magnetic rotor was used for uniform stirring. The rotation speed of each group was set consistently.
[0064] Avoid the impact of inconsistent rotation speed
[0065] Step 5: Samples were taken from the sampling port of the reaction bottle at 1h, 2h, 3h, 4h, 5h and 6h respectively. After sampling, the valve was immediately closed. The nitrate nitrogen concentration was detected after filtration with filter paper. At the end of denitrification, samples were taken to measure MLSS, MLVSS and COD concentration. During the whole process, dosing and sampling were very convenient and did not bring in oxygen.
[0066] (3) Analysis of experimental data
[0067] The experimental data analysis of the above-mentioned carbon source screening test device is shown in Table 2.
[0068] Table 2 is the experimental data analysis table of carbon source screening test
[0069]
[0070] From the above Table 2, from the C / N aspect, the dosage of C carbon source for removing unit nitrate nitrogen is the least, the dosage of A carbon source and C carbon source is not much different, and the dosage of B carbon source is the most. From the denitrification rate aspect, the denitrification rate is the fastest within 1h of reaction, and gradually slows down with time. Overall, the reaction rate of C carbon source is the fastest, and the reaction rate of B carbon source is the slowest. From the denitrification amount aspect, the denitrification amount of C carbon source is the most, the denitrification amount of A carbon source and C carbon source is close, and the denitrification amount of B carbon source is relatively less. From the cost aspect, the cost of A carbon source for removing unit nitrate nitrogen is the highest, the cost of B carbon source is the second, and the cost of C carbon source for removing unit nitrate nitrogen is the lowest. According to the above data analysis, the denitrification effect of C carbon source is the best, and the cost of C carbon source for removing unit nitrate nitrogen is also lower than that of A carbon source. Therefore, C carbon source can be selected as the optimal carbon source for the sewage plant.
[0071] The above merely describes a preferred specific implementation of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be encompassed within the scope of protection of the present application. Therefore, the scope of protection of the present application should be subject to the scope of protection of the claims. The information disclosed in the background section of the present application is merely intended to deepen the understanding of the overall background technology of the present application, and should not be regarded as acknowledging or implying in any form that the information constitutes the prior art known to those skilled in the art.
Claims
1. A screening test device for rapid carbon source screening in wastewater treatment plants, characterized in that, The utility model relates to a kind of reaction bottle and its nitrogen inlet pipe and carbon source feeding pipe, comprising: Reaction bottle, bottle cap, nitrogen inlet pipe, carbon source feeding pipe, sampling pipe, magnetic rotor, magnetic stirrer and sampling valve;Wherein, The upper end of the reaction bottle is provided with an opening. The bottle cap is tightly sealed on the opening of the reaction bottle by screwing. The nitrogen inlet pipe and the carbon source feeding pipe are arranged in the reaction bottle through the bottle cap, the lower end of the nitrogen inlet pipe is in the bottom of the reaction bottle, and the medicine outlet of the carbon source feeding pipe is above the liquid level in the reaction bottle. The reaction bottle is arranged on the magnetic stirrer, and the magnetic rotor is arranged in the bottom of the reaction bottle. The sampling pipe is arranged in the middle and lower part of the reaction bottle and is in communication with the reaction bottle.
2. The screening test device for rapid carbon source screening in wastewater treatment plants according to claim 1, characterized in that, Further comprising: Nitrogen valve and dosing valve;Wherein, The nitrogen valve is arranged on the nitrogen inlet pipe. The dosing valve is arranged on the carbon source feeding pipe.
3. The screening test device for rapid carbon source screening in wastewater treatment plants according to claim 1 or 2, characterized in that, The nitrogen inlet pipe is composed of a hard pipe section and a soft pipe section.
4. The screening test device for rapid carbon source screening in wastewater treatment plants according to claim 1 or 2, characterized in that, The hard pipe section is arranged in the reaction bottle through the bottle cap.
5. The screening test device for rapid carbon source screening in wastewater treatment plants according to claim 1, characterized in that, The carbon source feeding pipe is composed of a hard pipe and a hose.
6. The screening test device for rapid carbon source screening in wastewater treatment plants according to claim 1 or 5, characterized in that, The reaction bottle uses a bottle body with scale.
7. The screening test device for rapid carbon source screening in wastewater treatment plants according to claim 1 or 2, characterized in that, The volume of the reaction bottle is 1-2L.
8. The screening test device for rapid carbon source screening in wastewater treatment plants according to claim 1 or 2, characterized in that, The sampling pipe is arranged on the side of the upper one-third bottle body from the bottom of the reaction bottle. The magnetic stirrer is provided with a switch, an adjusting knob and a speed display screen.