Method for determining dosage of beet pulp bio-adsorbent in industrial wastewater treatment

Abstract

The invention discloses a method for determining the dosage of a beet pulp bio-adsorbent in industrial wastewater treatment, and relates to the technical field of industrial wastewater treatment, and the method comprises the following steps: S1, sewage sampling, S2, sewage treatment, S3, adsorbent control, S4, sewage sample control, S5, data recording, and S6, data calculation. And S7, determining data. When the method for determining the dosage of the beet pulp bio-adsorbent in industrial wastewater treatment is used, sewage can be divided into multiple groups according to the concentration, the corresponding dosage of the beet pulp bio-adsorbent is added into the sewage with different concentrations, and meanwhile, the concentration of the sewage is detected in real time; the adsorption capacity and the removal rate of the beet pulp bio-adsorbent of the sample are calculated through a formula, so that the relationship between the concentration of the sewage sample and the addition amount is obtained, multiple groups of data are compared, and the optimal addition amount is calculated through the adsorption capacity and the removal rate of the beet pulp bio-adsorbent, so that the calculated data are more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a method for determining the dosage of a beet pulp biosorbent in industrial wastewater treatment. Background Art

[0002] Ammonia nitrogen is a form of nitrogen in water. The large-scale discharge of domestic wastewater, agricultural wastewater, and industrial wastewater will cause the content of ammonia nitrogen in the water to increase, leading to the proliferation of microorganisms and algae in the water, causing eutrophication of the water body. At present, the methods for removing ammonia nitrogen from wastewater mainly include: biological method, electrochemical method, breakpoint chlorination method, photocatalytic treatment method, selective ion exchange method and adsorption method, among which, the biological method is suitable for wastewater with low ammonia nitrogen concentration; the breakpoint chlorination method is mainly used in household tap water or low-concentration ammonia nitrogen wastewater that is difficult to treat by biological method; photocatalytic treatment is a green and sustainable treatment method, but the stability and production cost of the catalyst have certain defects. Compared with other treatment methods, the adsorption method is considered to be a very promising technology for treating ammonia nitrogen wastewater due to its simple and effective process, low operating cost, economical and practical, and good stability. The key to the adsorption method is the selection of adsorption materials. So far, the adsorption materials used to remove ammonia nitrogen from wastewater mainly include: zeolite, fly ash, bamboo charcoal, charcoal and activated carbon.

[0003] In recent years, biochar, as a new type of adsorption material, has been widely used in the field of wastewater treatment due to its large specific surface area, developed pore structure, simple production process and no need for activation treatment. Beet pulp is a biological waste produced by shredding and leaching beet roots in the sugar production process. Xinjiang is an important beet sugar producing area in my country, and its beet sugar production accounts for more than 60% of the country. Therefore, Xinjiang's beet production is large and the cost is low. In addition, there are few studies on the adsorption behavior and influencing factors of ammonia nitrogen in eutrophic water bodies using beet pulp to prepare biochar. Therefore, the use of beet pulp biochar to adsorb ammonia nitrogen in water bodies can provide new ideas for the treatment of ammonia nitrogen in eutrophic water bodies.

[0004] When using existing beet pulp biosorbents, in order to quickly and conveniently calculate the dosage of the beet pulp biosorbent, only the removal rate of the beet pulp biosorbent on the sewage sample is calculated. However, the addition amount of the beet pulp biosorbent is affected by multiple groups of data. Therefore, it is impossible to obtain a more accurate dosage of the beet pulp biosorbent by only relying on the removal rate of the rapeseed meal biosorbent to determine the dosage of the beet pulp biosorbent. Summary of the invention

[0005] The object of the present invention is to provide a method for determining the dosage of beet pulp biosorbent in industrial wastewater treatment, so as to solve the problem that the dosage of beet pulp biosorbent mentioned in the above background technology cannot be accurately obtained.

[0006] To achieve the above object, the present invention provides the following technical solution: a method for determining the amount of beet pulp biosorbent in industrial wastewater treatment, comprising the following steps:

[0007] S1: Determine the main pollutant components in sewage, including the main heavy metals and organic matter in sewage, and prepare beet pulp biosorbent;

[0008] S2: Perform preliminary treatment on the sewage to remove larger suspended particles and sediments in the sewage so as not to affect the subsequent experimental process;

[0009] S3: Take the same volume of sewage samples with different concentrations and add the same weight of beet pulp biosorbent to the sewage samples with different concentrations;

[0010] S4: Take different volumes of beet pulp biosorbent and mix them evenly in the sewage sample with the same concentration;

[0011] S5: Finally, the concentration changes of pollutants in each group of experimental sewage are recorded regularly until the concentration of pollutants in the sewage does not change;

[0012] S6: Collect the data obtained from the experiment and then record them in the form of charts, so that the data results can be displayed more intuitively;

[0013] S7: Based on the results of the experimental data, the relationship between the amount of beet pulp biosorbent added and the sewage concentration can be determined, thereby determining the optimal dosage.

[0014] Preferably, when preparing the beet pulp biosorbent in S1, it is necessary to ensure that the beet pulp itself is not contaminated, and it is also necessary to wash it with distilled water or deionized water to remove impurities on the surface.

[0015] Preferably, in S2, the sewage needs to be simply treated to remove large particles in the sewage, and then the pH value of the sewage is adjusted to a suitable range, generally 6-8.

[0016] Preferably, in S3, the same volume of sewage with different concentrations is injected into different containers in sequence, and then the same weight of beet pulp biosorbent is injected into different sewage containers, and a magnetic stirrer is used to fully stir the mixed solution so that the sewage and the beet pulp biosorbent are fully mixed.

[0017] Preferably, the step S4 is similar to the step S3, except that the sewage concentration is changed to the same concentration, the beet pulp biosorbent is used in different gram weights, and a magnetic stirrer is also used for uniform stirring.

[0018] Preferably, the weight differences of the beet pulp biosorbents of different weights in S4 are the same. For example, a point may be selected every 0.2 g / L between 0.1 g / L and 1 g / L to obtain 0.1 g / L beet pulp biosorbent, 0.3 g / L beet pulp biosorbent, 0.5 g / L beet pulp biosorbent, 0.7 g / L beet pulp biosorbent and 0.9 g / L beet pulp biosorbent, respectively.

[0019] Preferably, in S3 and S4, other conditions of each group of samples should be ensured to be the same, such as temperature, pH value, stirring time, adsorption time, so as to ensure the accuracy of the experiment.

[0020] Preferably, the recorded data in S5 and S6 can be statistically analyzed and plotted into graphs, wherein the recorded data include: initial concentration of sewage, concentration of sewage after adsorption, dosage and time of beet pulp biosorbent, and the adsorption capacity of the beet pulp biosorbent is calculated using a formula based on the above data.

[0021] Preferably, the adsorption capacity of the beet pulp biosorbent is calculated as follows:

[0022]

[0023] Where: R is the adsorption capacity (unit: mg / g or mg / L / g)

[0024] m is the mass of the adsorbent (unit: g)

[0025] is the initial pollutant concentration (unit: mg / L)

[0026] is the concentration reached after removal (unit: mg / L)

[0027] V is the total volume of the solution (unit: L)

[0028] W is the dosage of adsorbent (unit: g).

[0029] Preferably, in S7, the beet pulp biosorbent removal rate of each group of samples can be calculated by data, and the calculation formula of the removal rate is:

[0030]

[0031] Where: W is the adsorption capacity (unit: mg / g or mg / L / g)

[0032] is the initial pollutant concentration (unit: mg / L)

[0033] is the concentration reached after removal (unit: mg / L)

[0034] After calculating the removal rate of each group of samples, they are compared with the adsorption capacity of the beet pulp biosorbent. By selecting samples with relatively high removal rate and adsorption capacity, the relationship between the addition amount of beet pulp biosorbent and the sewage concentration can be obtained.

[0035] Compared with the prior art, the present invention has the following beneficial effects: when using the method for determining the amount of beet pulp biosorbent in industrial wastewater treatment, the corresponding number of sewage samples can be selected first, and then the sewage can be divided into multiple groups according to concentration, and different amounts of beet pulp biosorbent in grams can be added to the sewage with different concentrations, and the sewage concentration after the reaction can be detected in real time, and then the adsorption capacity and removal rate of the beet pulp biosorbent of the corresponding sample can be calculated by using a formula, so as to obtain the relationship between the sewage sample concentration and the amount of beet pulp biosorbent added. Since multiple groups of data are used for comparison, and the optimal amount of beet pulp biosorbent is calculated by the adsorption capacity and removal rate of the rapeseed pulp biosorbent, the calculated data is more accurate. Then these are the operating steps of the method for determining the amount of beet pulp biosorbent in industrial wastewater treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall process structure of the present invention; DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1 The present invention provides a technical solution: a method for determining the amount of beet pulp biosorbent used in industrial wastewater treatment, comprising the following steps:

[0039] S1: Determine the main pollutant components in the sewage, including the main heavy metals and organic matter in the sewage, and prepare the beet pulp biosorbent. Make sure that the beet pulp itself is not contaminated and wash it with distilled water or deionized water to remove surface impurities;

[0040] S2: Perform preliminary treatment on the sewage to remove larger suspended particles and sediments in the sewage, and then adjust the pH value of the sewage to a suitable range, generally 6-8, so as not to affect the subsequent experimental process;

[0041] S3: Take the same volume of sewage with different concentrations and inject them into different containers in turn, then inject the same gram weight of beet pulp biosorbent into different sewage containers, and use a magnetic stirrer to fully stir the mixed solution to make the sewage and beet pulp biosorbent fully mixed, and ensure that other conditions of each group of samples are the same, such as temperature, pH value, stirring time, adsorption time, so as to ensure the accuracy of the experiment;

[0042] S4: Take the sewage of the same concentration again, and then pour different grams of beet pulp biosorbent into the sewage in different containers in turn, and stir evenly with a magnetic stirrer, and ensure that other conditions are the same;

[0043] S5: Finally, the concentration data changes of pollutants in each group of experimental sewage are recorded regularly, including: the initial concentration of sewage, the concentration of sewage after adsorption, the dosage and time of beet pulp biosorbent, until the concentration of pollutants in sewage does not change;

[0044] S6: Statistic the data obtained from the experiment and then record them in the form of charts, so as to display the data results more intuitively. At the same time, the adsorption capacity of the beet pulp biosorbent is calculated using a formula based on the above data;

[0045] S7: According to the results of the experimental data, the removal rate of the beet pulp biosorbent for each group of samples can be calculated through the data, and then the relationship between the addition amount of the beet pulp biosorbent and the sewage concentration can be determined through the removal rate of the beet pulp biosorbent and the adsorption capacity of the beet pulp biosorbent, so as to determine the optimal dosage.

[0046] Example

[0047] First, a sewage sample can be selected, and the composition and content of heavy metals and organic matter in the sewage sample can be measured. Then, the sewage is preliminarily treated to remove larger particles of debris in the sewage, and the pH value of the sewage is adjusted to neutral. The beet pulp is then rinsed with deionized water, and the dust is removed and dried. The dried beet pulp is taken out and crushed with a grinder for later use, and placed in a crucible. The crucible is placed in a muffle furnace to prepare biochar with pyrolysis temperatures of 300°C, 400°C, 500°C, 600°C, and 700°C, respectively, and the constant temperature pyrolysis time is 2 hours. After the muffle furnace is cooled to room temperature, the biochar is taken out for later use. Then, 5 groups of sewage samples with different concentrations and the same volume can be taken, and the same weight of 0.5 g / L beet pulp biosorbent can be poured into the 5 groups of samples in turn, and they are fully stirred with a magnetic stirrer. Then, 5 groups of sewage samples with the same concentration and the same volume can be taken, and the weights of 0.1 g / L beet pulp biosorbent, 0.3 g / L beet pulp biosorbent, 0.5 g / L rapeseed meal biosorbent, 0.7 g / L beet pulp biosorbent and 0.9 g / L beet pulp biosorbent can be poured into the 5 groups of sewage samples in turn, and the magnetic stirrer can be used to stir them thoroughly. The solution is stirred by a stirrer. At the same time, the temperature, pH value, stirring time and adsorption time of the above 10 groups of samples must be the same to ensure the accuracy of the experiment. During this period, the concentration of the sewage can be measured regularly until the concentration value of the sewage does not change. Finally, multiple groups of data can be obtained, including the initial concentration of the sewage, the concentration of the sewage after adsorption, the amount and time of the beet pulp biosorbent. The obtained data are statistically analyzed in the form of charts, and then the adsorption capacity of the corresponding beet pulp biosorbent of each group of samples is calculated using the formula:

[0048]

[0049] Where: R is the adsorption capacity (unit: mg / g or mg / L / g), m is the mass of the adsorbent (unit: g), is the initial pollutant concentration (unit: mg / L), is the concentration after removal (unit: mg / L), V is the total volume of the solution (unit: L), and W is the dosage of the adsorbent (unit: g), so that the adsorption capacity of the beet pulp biosorbent for 10 groups of sewage samples can be obtained, and then the removal rate of the beet pulp biosorbent can be calculated using the formula. The calculation formula for the removal rate of the beet pulp biosorbent is:

[0050]

[0051] Where: W is the adsorption capacity (unit: mg / g or mg / L / g), is the initial pollutant concentration (unit: mg / L), The concentration after removal (unit: mg / L) is calculated. After the adsorption capacity and removal rate of the beet pulp biosorbent for 10 groups of sewage sample data are calculated, the data can be compared to select the values ​​of the adsorption capacity and removal rate of the beet pulp biosorbent with relatively high values ​​among the 10 groups of data. For example, when the sewage volume of the corresponding sample group is 1L and the added beet pulp biosorbent content is 0.5g, the adsorption capacity and removal rate of the corresponding beet pulp biosorbent are relatively high. At this time, the corresponding optimal addition amount of beet pulp biosorbent is 0.5g / L. According to the optimal addition amount, when the sewage volume is 100L, the corresponding optimal addition amount of beet pulp biosorbent is 50g, and so on, so as to determine the optimal dosage of beet pulp biosorbent.

[0052] In summary, when using the method for determining the amount of beet pulp biosorbent in industrial wastewater treatment, appropriate sewage samples can be first taken, and then the sewage samples are preliminarily treated and divided into multiple groups of samples of the same volume. After the beet pulp biosorbent is processed, the beet pulp biosorbent is put into the corresponding sample container according to the corresponding gram weight and fully mixed and stirred. Then, the sewage concentration in the container can be detected regularly. When the sewage concentration stops changing, the data can be statistically recorded, and then the adsorption capacity and removal rate of the beet pulp biosorbent of the corresponding sample are calculated using the formula, and the corresponding amount of beet pulp biosorbent added is determined according to the adsorption capacity and removal rate. These are the operating steps of the method for determining the amount of beet pulp biosorbent in industrial wastewater treatment. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0053] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for determining the amount of beet pulp biosorbent used in industrial wastewater treatment, characterized in that: The following steps are involved: S1: Determine the main pollutant components in sewage, including the main heavy metals and organic matter in sewage, and prepare beet pulp biosorbent; S2: Perform preliminary treatment on the sewage to remove larger suspended particles and sediments in the sewage so as not to affect the subsequent experimental process; S3: Take the same volume of sewage samples with different concentrations and add the same weight of beet pulp biosorbent to the sewage samples with different concentrations; S4: Take different volumes of beet pulp biosorbent and mix them evenly in the sewage sample with the same concentration; S5: Finally, the concentration data changes of pollutants in each group of experimental sewage are recorded regularly until the concentration of pollutants in the sewage does not change; S6: Collect the data obtained from the experiment and then record them in the form of charts, so that the data results can be displayed more intuitively; S7: Based on the results of the experimental data, the relationship between the amount of beet pulp biosorbent added and the sewage concentration can be determined, thereby determining the optimal dosage.

2. The method for determining the amount of beet pulp biosorbent used in industrial wastewater treatment according to claim 1, characterized in that: When preparing the beet pulp biosorbent in S1, it is necessary to ensure that the beet pulp itself is not contaminated, and it is also necessary to wash it with distilled water or deionized water to remove impurities on the surface.

3. The method for determining the amount of beet pulp biosorbent used in industrial wastewater treatment according to claim 1, characterized in that: In S2, the sewage needs to be simply treated to remove large particles in the sewage, and then the pH value of the sewage is adjusted to a suitable range, generally 6-8.

4. The method for determining the amount of beet pulp biosorbent used in industrial wastewater treatment according to claim 1, characterized in that: In S3, the same volume of sewage with different concentrations is injected into different containers in sequence, and then the same weight of beet pulp biosorbent is injected into different sewage containers, and a magnetic stirrer is used to fully stir the mixed solution so that the sewage and the beet pulp biosorbent are fully mixed.

5. The method for determining the amount of beet pulp biosorbent used in industrial wastewater treatment according to claim 1, characterized in that: The step S4 is similar to the step S3, except that the sewage concentration is changed to the same concentration, the sugar beet pulp biosorbent is used in different gram weights, and a magnetic stirrer is also used for uniform stirring.

6. The method for determining the amount of beet pulp biosorbent used in industrial wastewater treatment according to claim 5, characterized in that: The weight differences of the beet pulp biosorbents of different weights in S4 are the same. For example, a point may be selected every 0.2 g / L between 0.1 g / L and 1 g / L to obtain 0.1 g / L beet pulp biosorbent, 0.3 g / L beet pulp biosorbent, 0.5 g / L beet pulp biosorbent, 0.7 g / L beet pulp biosorbent and 0.9 g / L beet pulp biosorbent, respectively.

7. The method for determining the amount of beet pulp biosorbent used in industrial wastewater treatment according to claim 1, characterized in that: In S3 and S4, other conditions of each group of samples should be ensured to be the same, such as temperature, pH value, stirring time, and adsorption time, so as to ensure the accuracy of the experiment.

8. The method for determining the amount of beet pulp biosorbent used in industrial wastewater treatment according to claim 1, characterized in that: In S5 and S6, the recorded data can be statistically analyzed and plotted into graphs. The recorded data include: the initial concentration of the sewage, the concentration of the sewage after adsorption, the dosage and time of the beet pulp biosorbent, and the adsorption capacity of the beet pulp biosorbent is calculated using a formula based on the above data.

9. The method for determining the amount of beet pulp biosorbent used in industrial wastewater treatment according to claim 8, characterized in that: The calculation formula for the adsorption capacity of the beet pulp biosorbent is: Where: R is the adsorption capacity (unit: mg / g or mg / L / g) m is the mass of the adsorbent (unit: g) is the initial pollutant concentration (unit: mg / L) is the concentration reached after removal (unit: mg / L) V is the total volume of the solution (unit: L) W is the dosage of adsorbent (unit: g).

10. The method for determining the amount of beet pulp biosorbent used in industrial wastewater treatment according to claim 1, characterized in that: In S7, the beet pulp biosorbent removal rate of each group of samples can be calculated through the data. The calculation formula of the removal rate is: Where: W is the adsorption capacity (unit: mg / g or mg / L / g) is the initial pollutant concentration (unit: mg / L) is the concentration reached after removal (unit: mg / L) After calculating the removal rate of each group of samples, they are compared with the adsorption capacity of the beet pulp biosorbent. By selecting samples with relatively high removal rate and adsorption capacity, the relationship between the addition amount of beet pulp biosorbent and the sewage concentration can be obtained.

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