Biological nitrogen removal engineering
The following are some of the contents related to the biological nitrogen removal project: * * I. A device that uses a three-stage biological filter to simultaneously remove nitrogen and phosphorus (can be regarded as a form of a module biological nitrogen removal project)** 1. * * Device structure and operation mode ** - It was composed of three biological filter tanks with the same structure and interconnected in series. The device operated periodically, and each operation cycle included the alternating combination of the first and second operating conditions. In the first working condition, the three filter tanks were respectively in the state of anobia, aerobia and anoxia; in the second working condition, the three filter tanks were respectively in the state of anoxia, aerobia and anoxia. - This kind of module structure was easy to expand and expand later. The three filter tanks were independent of each other. Denitfying phosphorous accumulating bacteria existed in the biological filter tank 1 and the biological filter tank 3, and the nitrating bacteria existed in the biological filter tank 2, so the separation of nitrating bacteria and the denitrating phosphorous accumulating bacteria was realized. 2. * * Strengths ** - The carbon source and the amount of oxygen are saved, the sludge output is reduced, and the steps of sludge settling, nitration liquid return, sludge return, and the like are omitted, thereby reducing the cost and effectively realizing simultaneous nitrogen and phosphorus removal. * * 2. Divided water intake-split-module high efficiency nitrogen removal process (another kind of module biological nitrogen removal project)** 1. * * Production process ** - The sewage to be treated is sent into the reactor after being divided. The reactor includes a shortcut nitration zone, a shortcut detoxification zone, and an anammox zone, and the three zones are interconnected. The sewage to be treated is divided into two parts, one part is sent to the shortcut nitration zone, and the other part is sent to the shortcut detoxification zone. 2. * * Function Realization ** - Through the split-point water intake function and the method of split-joint biological membrane modules, NH4 + and COD-containing waste water can be efficiently removed through short-range nitration, short-range dehydration and anammox respectively. By rationally designing the module structure and optimization of the process operation mode, the aim of these modules was to improve the biological nitrogen removal efficiency, reduce costs, and facilitate management and improvement. Read more exciting novels for free
What is the reaction of nitrogen removal?
Denitration reaction refers to the reaction process of removing nitrogen from the system under various effects. From the perspective of sewage treatment, biological nitrogen removal mainly included three processes: imprinting, nitration, and detoxification. The fermentation process was a process in which microorganisms decomposed organic nitrogen compounds to produce nitrogen. It involved the first decomposition of organic nitrogen compounds into simple nitrogen compounds, and then these simple nitrogen compounds were converted into nitrogen. The nitration reaction was completed by an autotrophs. In the presence of oxygen, the nitrogen radical was first converted into nitrates by the use of carbon as a carbon source, and then it was oxided into nitrates. This process could be divided into two stages. The first stage was the conversion of nitrogen into nitrates by the nitrogen bacteria, and the second stage was the conversion of nitrates into nitrates by the nitrogen bacteria. Denitration reaction is a process in which the detoxifying bacteria reduce the nitrogen from the nitrogen and nitrogen into gaseous nitrogen (N <2>) under the anoxic-deficient condition. The nitrogen escapes from the sewage to achieve the purpose of nitrogen removal. In addition, there was also the absorption reduction method for nitrogen removal, which was a nitrogen pollution control technology that used the water solution of sulfates, nitrates, sulfur compounds, or ureas an absorbing agent to absorb and reduce NOX into nitrogen in the liquid phase. The selective catalyst reduction method for nitrogen removal was to use nitrogen as a reducing agent to carry out the catalyst reduction treatment of NOX-containing gases. The hydrogen hydrogen could also be used as a reducing agent for the selective catalyst reduction of NOX. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is the research content of contemporary biological reaction engineering?
Bioreaction engineering mainly studied the common engineering problems in the biological reaction process. His contemporary research included the following aspects: 1. ** Basic Principles of Biological Reaction **: This paper deals with the kinetic theory of microorganisms, cell growth, and the heat balance in the process of cultivating microorganisms. 2. ** Bioreactor Principle **: This paper deals with the physical processes and their effects when carrying out biological reactions in the reactor, the flow pattern, operation methods, and stability of the reactor, as well as the basic theory of the reactor such as amplification. 3. ** Various types of biological reactors **: This paper will discuss the common stirred reactors, bubbling reactors, airlift reactors, fixed bed reactors, and fluidized bed reactors in industry and scientific research. According to the characteristics of different reactors, their structure, mass transfer, heat transfer, and momentum transfer will be briefly described and analyzed. 4. ** process development and design **: design an economical and reasonable process, including medium preparation and sterilization, preparation of sterile air, expansion of culture, process design, reactor design and control, product recovery and separation (including waste water treatment), etc. The design basis of these operations is based on mass transfer, heat transfer, and biological reaction dynamics (namely, three transfer and one reverse). 5. ** Biological reaction kinetic research **: The purpose is to provide suitable kinetic rate equations to describe the reaction system of microorganisms (or microorganisms, animals, plants, etc.), determine the use of these equations in design, plan laboratory experiments, and determine the rate constant required by the kinetic equation. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Molar nitrogen and nitrogen react?
Under certain conditions, the reaction between nitrogen and nitrogen can occur. For example, in the presence of oxygen, the reaction between nitrogen and nitrogen can produce nitrogen.(4NH2 + 3O2 = ignition = 2N2 + 6H2 O); The synthetic nitrogen reaction is the reaction of nitrogen and hydrogen to produce nitrogen gas (N2 + 3H2 2NH2, catalyst, high temperature and high pressure). This is a irreversible reaction. From the reverse process of this reaction, nitrogen gas can also be converted to nitrogen and hydrogen under certain conditions; The reaction of nitrogen dioxide and nitrogen gas can produce nitrogen and water (4NH3 + 6NO = 5N2 + 6H2O). However, if it was simply a reaction between nitrogen and nitrogen, they would not react under normal circumstances. This was because nitrogen was a very inactive chemical gas that did not easily react with other substances. As for the discussion on this issue on Zhihu, he could not tell them exactly because he did not find any relevant content. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Absorbency of blank value of nitrogen and nitrogen
In the detection of nitrogen and nitrogen, the blank light absorption referred to the light absorption obtained by measuring the light source, the cuvette, and other optical systems without any sample. The blank absorption range of nitrogen nitrogen was a key factor in the process of nitrogen nitrogen detection. It played an important role in ensuring the accuracy and reliability of the test results. The reagent blank for the determination of nitrogen and nitrogen shall have an absorption value of not more than 0.030 (10mm cuvette), and the test water blank shall have an absorption value of not more than 0.030 to meet the requirements of determining the absence of nitrogen and nitrogen. "Little Fox Fairy" is equally exciting. Everyone is welcome to click and read it!
What will happen to the reaction of iron sulfuric acid and nitrogen nitrogen?
Based on context alone Iron Sulphate (Fe2 (SO)) and nitrogen nitrogen (usually in the form of NHin solution) will react. In the solution, iron ions (Fe3) will be produced by the dissolution of iron sulfuric acid, and the iron ions will undergo a double decomposition reaction with the lithium ions (NH3). Iron ions were decomposed to produce iron (III), while the nitrogen ions were decomposed to produce nitrogen (III). The nitrogen ions were unstable and would decompose to produce nitrogen (III). The reaction equation was roughly as follows: Fe₂(SO₄)₃ + 6NH₄⁺ + 6H₂O = 2Fe(OH)₃↓+ 3(NH₄)₂SO₄ + 6H⁺ (NH The reaction will continue to proceed to the right, and the nitrogen ions will be further decomposed to produce hydrogen gas that escapes from the system. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Nessler's reagent standard curve for determining nitrogen nitrogen
The following is the content related to the standard curve of Nessler's reagent for determining nitrogen and nitrogen: 1. ** Steps of Drawing the Calibrating Curv ** - Add 0.00, 0.50, 1.00, 2.00, 4.00, 6.00, 8.00, and 10.00ml of the standard working solution of nitrogen into eight 50ml color comparison tubes, respectively. The corresponding contents of the standard working solution of nitrogen and nitrogen are 0.0, 5.0, 10.0, 20.0, 40.0, 60.0, 80.0, and 100.0 ug, respectively. Add water to the marking line. - Add 1.0ml of the solution of potassium-Na tartrate and shake it well. Then add 1.5ml of mercuric chloride-potassium iodide-potassiumoh solution or 1.0ml of mercuric iodide-potassium iodide-potassiumoh solution (Nessler's reagent) and shake it well. - After standing for 10 minutes, measure the absorption with a 20-mm light path cuvette at a wave length of 420 mm and water as a reference. - The absorption after blank correction was used as the ordinate and the corresponding nitrogen content (ug) was used as the abyssal coordinate to draw the correction curve. A 10mm cuvette can also be used according to the mass concentration of the sample to be tested. 2. ** Exemplary Data ** - For example, some data showed that when the nitrogen content was 0.000g, the light absorption was 0.028, and when the nitrogen content was 0.005g, the light absorption was 0.055. A standard curve was drawn based on these data points (the content of nitrogen and its corresponding light absorption). For example, the data was as follows: - No. 1: Volume: 0ml, standard concentration of nitrogen nitrogen: 10 ug/ml (mass: 0 ug), absorption value: 0.096. - No. 2: Volume: 1ml, standard concentration of nitrogen nitrogen: 10 ug/ml (mass: 10 ug), light absorption value: 0.14. - Number 3: The volume is 2ml, the standard concentration of nitrogen is 10 ug/ml (mass is 20 ug), and the absorption value is 0.179. According to these data, a standard curve of the relationship between the nitrogen content and the light absorption can be drawn. This curve is generally linear, for example, it meets the linear equation of <y = 3.512x+ 0.0048>(where <y> is the corrected light absorption, and <x> is the nitrogen content), which is used to calculate the nitrogen content according to the measured light absorption. "Little Fox Fairy" is equally exciting. Everyone is welcome to click and read it!
Is it better to remove nitrogen and nitrogen by neutralizing bacteria or neutralizing bacteria?
Nitifying bacteria could catalyze nitrogen (nitrogen or aminium) to either dilute acid or dilute acid to dilute acid. During this process, they could convert the nitrogen into nitrogen. Denitifying bacteria, on the other hand, used nitrates and other substances as electron receptors in an anoxic-deficient environment to allow organic matter to breathe and release energy. It was mainly related to the reduction of nitrates and nitrates, and was not directly targeted at the removal of nitrogen and nitrogen. Therefore, in the removal of nitrogen and nitrogen, the nitrating bacteria played a major role. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
How to test for nitrogen?
The test method for the colorless and pungent odor of the gas was as follows: First, it could be tested with a wet red litmus test paper. If the test paper turned blue, it proved the existence of the gas. Second, a glass rod dipped in concentrated sulfuric acid was used to approach the gas to be tested. If white smoke was produced, it indicated the existence of the gas. While waiting for the TV series, you can also click on the link below to read the classic original work of "Dafeng Nightwatchman"!
Reaction of silver and nitrogen
The solution of silver amine was the solution of AgNOH. When it was mixed with the solution of NaOx, the solution of NaOx would cause the balance of the solution of silver amine to shift to the right, forming silver solute. The silver solute would decompose into silver dioxide under the light. The reaction process was (AgNOH) NOH = AgNOH → 2NOH. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction of nitrogen and ethene
Under high temperature and high pressure and with a catalyst, ethene and nitrogen can react to form Pyrazine (C2H4N2) and hydrogen (H2). During this process, the carbon atoms of ethene combine with the nitrogen atoms of nitrogen to form new compounds. However, there was also a view that nitrogen was very stable and usually did not react with ethene. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>