CN115236270A - Novel industrial wastewater degradable organic carbon index determination method - Google Patents
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 68
- 239000010842 industrial wastewater Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 47
- 239000011651 chromium Substances 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims abstract description 16
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000004364 calculation method Methods 0.000 claims abstract description 13
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 8
- 239000001301 oxygen Substances 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 6
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 6
- 230000008859 change Effects 0.000 claims abstract description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 4
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 claims abstract description 4
- PTKRHFQQMJPPJN-UHFFFAOYSA-N dipotassium;oxido-(oxido(dioxo)chromio)oxy-dioxochromium;sulfuric acid Chemical compound [K+].[K+].OS(O)(=O)=O.[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O PTKRHFQQMJPPJN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 22
- 238000001035 drying Methods 0.000 claims description 19
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 18
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 12
- 239000011790 ferrous sulphate Substances 0.000 claims description 12
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 12
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 12
- 239000012086 standard solution Substances 0.000 claims description 12
- 238000004448 titration Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000009835 boiling Methods 0.000 claims description 7
- DGEZNRSVGBDHLK-UHFFFAOYSA-N [1,10]phenanthroline Chemical compound C1=CN=C2C3=NC=CC=C3C=CC2=C1 DGEZNRSVGBDHLK-UHFFFAOYSA-N 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 5
- 239000011449 brick Substances 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000007873 sieving Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- -1 dichromate ions Chemical class 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 2
- 238000004065 wastewater treatment Methods 0.000 abstract description 15
- 238000002474 experimental method Methods 0.000 abstract description 4
- 229940077449 dichromate ion Drugs 0.000 abstract 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 abstract 1
- 230000009467 reduction Effects 0.000 description 5
- 238000006386 neutralization reaction Methods 0.000 description 4
- 239000010802 sludge Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
Abstract
The invention discloses a novel method for measuring indexes of degradable organic carbon in industrial wastewater, and particularly relates to the field of industrial wastewater treatment, wherein the measuring method comprises the following steps: step S1, dehydrating an industrial wastewater sample, heating and digesting the industrial wastewater sample by a potassium dichromate method, so that organic carbon in the sample can be oxidized by an excessive potassium dichromate sulfuric acid solution, carbon elements of organic matters can be oxidized into carbon dioxide, hexavalent chromium is reduced into trivalent chromium, and the content of the organic carbon can be calculated according to the change of dichromate ion amount before and after the organic carbon is oxidized; and S2, substituting the data recorded in the experimental process into an original calculation formula for measuring the chemical oxygen demand, and replacing the millimolar mass parameter of oxygen in the formula with the millimolar mass of carbon. The method utilizes chemical experiments to quantitatively determine the numerical value of the degradable organic carbon, corrects the original empirical value parameters for calculation, and can be used for accurately calculating the carbon emission of each industrial wastewater treatment process and route.
Description
Technical Field
The invention relates to the technical field of industrial wastewater treatment, in particular to a novel method for measuring indexes of degradable organic carbon in industrial wastewater.
Background
China proposes to strive for carbon dioxide emission to reach a peak value in 2030 years before 9 months in 2020, and carbon neutralization is realized in 2060 years before. Various industries need to actively respond to calls, and reduce the existing emission by reforming and updating the prior art routes, processes and equipment. As an effective method and basis for controlling and reducing carbon emission, the method has received wide attention at home and abroad for performing accounting analysis on carbon emission generated in various fields.
Particularly, in the industrial wastewater treatment industry, according to the data of the national statistical administration, the total discharge amount of the industrial wastewater in China in 2019 is about 252 hundred million tons. The industrial wastewater has complex component types, large treatment difficulty, long process flow and higher energy consumption and material consumption, and is a key field of water pollution treatment and pollution reduction and carbon reduction. However, because of the great difference in the carbon emission of different industrial wastewater treatment processes on the accounting boundary, the most widely used default value model in the 1996 is IPCC (international Panel on simulation Change, abbreviated as IPCC) in terms of carbon emission accounting regardless of the process route adopted by each large sewage plant, and the related parameters are derived from the empirical values of IPCC, that is, the average values in the global range.
Because the type of the industrial wastewater is complex, a default value model and an empirical average value are directly used, and the calculation result is not necessarily in accordance with the actual situation. In addition, in consideration of differences in the composition and environment of industrial wastewater between developing countries and developed countries and regional areas, the IPCC empirical value is directly used for calculation, and the emission amount of greenhouse gases such as carbon dioxide and methane is large for industrial wastewater plants with daily wastewater treatment capacity of several hundred tons.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a novel method for measuring the index of degradable organic carbon in industrial wastewater, which can be used for accurately calculating the carbon emission of each industrial wastewater treatment process and route by quantitatively measuring the numerical value of the degradable organic carbon by using a chemical experiment and correcting the original experience value parameters for calculation. The disadvantages and the advantages of the industrial wastewater treatment processes in the aspect of carbon emission reduction are obtained, and the corresponding industrial wastewater treatment processes are selected for sludge treatment, so that the purpose of carbon emission reduction in the industrial wastewater treatment process is achieved, and contribution is made to the achievement of the carbon neutralization target.
In order to achieve the purpose, the invention adopts the following technical scheme:
a novel method for measuring indexes of degradable organic carbon in industrial wastewater comprises the following steps:
step S1: heating and digesting an industrial wastewater sample by a potassium dichromate method, so that organic carbon in the sample can be oxidized by an excessive potassium dichromate sulfuric acid solution, and carbon elements in the organic matter can be oxidized into carbon dioxide and hexavalent chromium (Cr) 6+ ) Is reduced into trivalent chromium (Cr) 3+ ) Titrating the residual potassium dichromate solution by using a ferrous sulfate standard solution, and calculating the content of the organic carbon according to the change of the amount of dichromate ions before and after the organic carbon is oxidized;
step S2: substituting the data recorded in the experimental process into the original calculation formula for measuring the Chemical Oxygen Demand (COD), and replacing the millimolar mass parameter of oxygen in the formula with the millimolar mass of carbon to obtain the following calculation formula:
wherein, V0 is the volume of the ferrous sulfate standard solution consumed during blank titration, and the unit is as follows: mL;
v, volume of ferrous sulfate standard solution consumed in titrating the sample, unit: mL;
mc, the millimolar mass of carbon, 1/4 of Mc is 0.003g/mmol;
m, concentration of ferrous sulfate standard solution, unit: mol/L;
w is the dried sample mass, unit: g.
in a preferred embodiment, the specific experimental steps of step S1 are as follows:
step S101: taking a certain amount of sample, dehydrating, and then placing in an oven for drying;
step S102: taking out the dried sample, immediately crushing and sieving;
step S103: storing the screened sample in a wide-mouth bottle, opening the bottle mouth, putting the wide-mouth bottle back into a drying box, and continuously drying the wide-mouth bottle;
step S104: taking out a sample from the drying box, and then putting the sample into a dryer for cooling;
step S105: weighing the dried and cooled sample, putting the sample into a triangular flask, and adding K with the weight of 1/6 of the sample 2 Cr 2 O 7 -H 2 SO 4 Mixing the solution, and shaking uniformly;
step S106: placing in glycerol bath, boiling, and taking out until completely cooling;
step S107: adding distilled water, then dripping in the o-phenanthroline indicator, and using standard FeSO 4 Titrating the solution until the sample turns brick red;
step S108: record FeSO consumed when sample turned brick-red 4 The number of milliliters of (a) is marked as V, and 5 parallel samples are respectively made for each sample; in addition, a blank is prepared for each sample at the time of measurement, and FeSO used in titration of the blank is used 4 The amount of the solution used is denoted V 0 。
In a more preferred embodiment, in step S101, the temperature in the oven is adjusted to 60 ℃ and the sample is dried for 12 hours.
In a more preferred embodiment, in step S102, the sample is pulverized and screened 20 # And (4) screening.
In a more preferred embodiment, in step S103, the screened sample is stored in a jar, which is then dried in a drying oven for 2 hours at 60 ℃ with the mouth open.
In a more preferred embodiment, in step S105, 0.07g of the dried and cooled sample is weighed into a 250mL triangular flask, and 20mL of K with a concentration of 0.4mol/L and a weight of 1/6 of the weight of the sludge sample is added 2 Cr 2 O 7 -H 2 SO 4 The solution was mixed and shaken well.
In a more preferred embodiment, in step S106, the sample is placed in a glycerol bath heated to 185-195 deg.C and kept boiling for 5 minutes at 170-180 deg.C.
In a more preferred embodiment, 120mL of distilled water is added and 3 drops of the o-phenanthroline indicator are added in step S107.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
compared with the prior art, the novel method for measuring the index of the degradable organic carbon in the industrial wastewater utilizes chemical experiments to quantitatively measure the numerical value of the degradable organic carbon, can be used for accurately accounting the carbon emission of each sludge treatment process and route by correcting the original empirical value parameters for calculation, and contributes to realizing the carbon neutralization target.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the present application, and the description and illustrative embodiments of the present application are provided to explain the present application and not to limit the present application. In the drawings:
FIG. 1 is a flow chart of the steps of a novel method for determining indexes of degradable organic carbon in industrial wastewater according to the present invention;
FIG. 2 is an experimental procedure of the novel method for determining indexes of degradable organic carbon in industrial wastewater.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
FIG. 1 is a flow chart showing the steps of a novel method for measuring indexes of degradable organic carbon in industrial wastewater according to the present invention. As shown in figure 1, the novel method for measuring the index of the degradable organic carbon in the industrial wastewater comprises the following steps:
step S1: heating and boiling the industrial wastewater sample by a potassium dichromate method, so that organic carbon in the industrial wastewater sample is oxidized by excessive potassium dichromate sulfuric acid solution, and carbon element of organic matter is oxidized into carbon dioxide and hexavalent chromium (Cr) 6+ ) Is reduced into trivalent chromium (Cr) 3+ ) Titrating the residual potassium dichromate solution by using a ferrous sulfate standard solution, and calculating the content of organic carbon according to the change of the amount of dichromate ions before and after the organic carbon is oxidized;
step S2: substituting the data recorded in the experimental process into the original calculation formula for measuring the Chemical Oxygen Demand (COD), and replacing the millimolar mass parameter of oxygen in the formula with the millimolar mass of carbon to obtain the following calculation formula:
wherein, V0 is the volume of the ferrous sulfate standard solution consumed during blank titration, and the unit is as follows: mL;
v, is the volume of the ferrous sulfate standard solution consumed during titration of the sample, and the unit is as follows: mL;
mc, the millimolar mass of carbon, 1/4 of Mc is 0.003g/mmol;
m, concentration of ferrous sulfate standard solution, unit: mol/L;
w is the dried sample mass, unit: g.
FIG. 2 is a flow chart of experimental steps of a novel method for determining indexes of degradable organic carbon in industrial wastewater. As shown in FIG. 2, the experimental steps of the novel method for measuring the index of degradable organic carbon in industrial wastewater provided by the invention are as follows:
step S101: taking a certain amount of samples and placing the samples in a drying oven for drying;
step S102: taking out the dried sample in the step S101, immediately crushing and sieving;
step S103: storing the sample screened in the step S102 in a wide-mouth bottle, opening the mouth of the wide-mouth bottle, putting the wide-mouth bottle back into a drying box, and continuously drying the wide-mouth bottle;
step S104: taking out the sample from the drying box in the step S103, and then putting the sample into a dryer for cooling;
step S105: weighing the dried and cooled sample, putting the sample into a triangular flask, and adding K with the weight of 1/6 of the sample 2 Cr 2 O 7 -H 2 SO 4 Mixing the solution, and uniformly shaking to obtain a suspension;
step S106: placing the mixed suspension prepared in the step S105 in a glycerol bath, keeping boiling, and taking out until the mixed suspension is completely cooled;
step S107: adding distilled water into the cooled mixed solution, then dripping the o-phenanthroline indicator into the mixed solution, and using standard FeSO 4 Titrating the solution until the sample turns brick red;
step S108: record FeSO consumed when sample turned brick-red 4 The number of milliliters of (a) is marked as V, and 5 parallel samples are respectively made for each sample; in addition, a blank is prepared for each sample at the time of measurement, and FeSO used in titration of the blank is used 4 The amount of solution used is denoted V 0 。
The technical solution of the present invention is further illustrated by an embodiment as follows:
example of the implementation
The region of China is wide, and industrial wastewater generated in different regions under different geographic environments and economic environments has certain difference in water quality. According to different regional characteristics and industrial wastewater differences in different regions of China, water samples of different industrial wastewater treatment plants of Heilongjiang Jiamusi, jiangsu Zhenjiang, hunan Changsha and Yunnan Lijiang are respectively collected for experimental detection.
The specific experimental operating method (see the attached figure 2) is as follows:
(1) putting a certain amount of sample in an oven, adjusting to 60 ℃ and drying for 12h; (2) taking out the dried sample, immediately crushing the dried sample and passing the crushed sample through a filter 20 # Sieving; (3) storing the screened sample in a wide-necked bottle, opening the bottle mouth, putting the wide-necked bottle back into a drying box, and continuously drying the wide-necked bottle for 2 hours at 60 ℃; (4) after taking out the sample from the drying boxCooling in a drier. (5) Weighing 0.07g of dried and cooled sample, placing into a 250mL triangular flask, adding 20mL of 1/6K with concentration of 0.4mol/L 2 Cr 2 O 7 -H 2 SO 4 Mixing the solution, and uniformly shaking; (6) placing in a glycerol bath heated to 185-195 ℃, keeping boiling at 170-180 ℃ for 5min, and taking out until completely cooling. (7) Adding 120mL of distilled water, then dripping 3 drops of an o-phenanthroline indicator, and using standard FeSO 4 Titrating the solution until the sample turns brick red; (8) record FeSO consumed when sample turned brick-red 4 In ml, denoted V, 5 replicates were run for each sample. In addition, a blank is prepared for each sample at the time of measurement, and FeSO used in titration of the blank is used 4 The amount of the solution used is denoted V 0 。
The experimental data are substituted into a calculation formula to obtain the degradable organic carbon in the wastewater of different industrial wastewater treatment plants, and specific numerical values are shown in table 1.
TABLE 1 actual measurement ratio of decomposition of degradable organic carbon in different industrial wastewater treatment plants
| Sample(s) | Sampling location | The proportion of degradable organic carbon is% |
| Sample A | Zhenjiang City, Jiangsu Province | 12.7 |
| Sample B | Zhenjiang City, Jiangsu Province | 16.5 |
| Sample C | Zhenjiang City, Jiangsu Province | 15.3 |
| Sample D | Jiaomusi of Heilongjiang province | 16.9 |
| Sample E | Changsha City, Hunan Province | 13.7 |
| Sample F | Lijiang city, yunnan province | 18.7 |
| IPCC recommended value | 50 |
In conclusion, the novel method for measuring the index of the degradable organic carbon in the industrial wastewater, disclosed by the invention, is used for measuring and calculating the degradable organic carbon in different industrial wastewater to obtain specific accounting parameters, so that the carbon emission accounting result is more accurate, and the method is favorable for evaluating the disadvantages and superiority of various industrial wastewater treatment processes in the aspect of carbon emission reduction, so as to achieve the purpose of reducing the carbon emission in the industrial wastewater treatment process and contribute to realizing the carbon neutralization target.
The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.
Claims (8)
1. A novel method for measuring indexes of degradable organic carbon in industrial wastewater is characterized by comprising the following steps:
step S1: heating and digesting an industrial wastewater sample by a potassium dichromate method, so that organic carbon in the sample can be oxidized by an excessive potassium dichromate sulfuric acid solution, and carbon elements of organic matters can be oxidized into carbon dioxide and hexavalent chromium Cr 6+ Is reduced into trivalent chromium Cr 3+ Titrating the residual potassium dichromate solution by using a ferrous sulfate standard solution, and calculating the content of the organic carbon according to the change of the amount of dichromate ions before and after the organic carbon is oxidized;
step S2: substituting data recorded in the experimental process into an original calculation formula for measuring the chemical oxygen demand, and replacing the millimolar mass parameter of oxygen in the formula with the millimolar mass of carbon to obtain the following calculation formula:
wherein, V0 is the volume of the ferrous sulfate standard solution consumed during blank titration, and the unit is as follows: mL;
v, is the volume of the ferrous sulfate standard solution consumed during titration of the sample, and the unit is as follows: mL;
mc, the millimolar mass of carbon, 1/4 of Mc is 0.003g/mmol;
m, concentration of ferrous sulfate standard solution, unit: mol/L;
w, oven-dried sample mass, unit: g.
2. the novel method for measuring the index of the degradable organic carbon in the industrial wastewater according to claim 1, wherein the step S1 comprises the following steps:
step S101: taking a certain amount of sample, dehydrating and then placing the sample in an oven for drying;
step S102: taking out the dried sample in the step S101, immediately crushing and sieving the dried sample;
step S103: storing the sample screened in the step S102 in a wide-mouth bottle, opening the mouth of the wide-mouth bottle, putting the wide-mouth bottle back into a drying box, and continuously drying the wide-mouth bottle;
step S104: taking out the sample from the drying box in the step S103, and then putting the sample into a dryer for cooling;
step S105: weighing the dried and cooled sample, putting the sample into a triangular flask, and adding K with the weight of 1/6 of the sample 2 Cr 2 O 7 -H 2 SO 4 Mixing the solution, and uniformly shaking to obtain a suspension;
step S106: placing the mixed suspension prepared in the step S105 in a glycerol bath, keeping boiling, and taking out until the mixed suspension is completely cooled;
step S107: adding distilled water into the cooled mixed solution, then dripping the o-phenanthroline indicator into the mixed solution, and using standard FeSO 4 Titrating the solution until the sample turns brick red;
step S108: record FeSO consumed when sample turned brick-red 4 The number of milliliters of (a) is marked as V, and 5 parallel samples are respectively made for each sample; in addition, a blank is prepared for each sample at the time of measurement, and FeSO used in titration of the blank is used 4 The amount of the solution used is denoted V 0 。
3. The novel method for measuring the index of degradable organic carbon in industrial wastewater according to claim 2, wherein in step S101, the temperature in the oven is adjusted to 60 ℃, and the sample is dried for 12 hours.
4. The method for determining index of degradable organic carbon in industrial wastewater according to claim 2, wherein in step S102, the sample is crushed and screened 20 # And (4) screening.
5. The novel method for measuring the index of the degradable organic carbon in the industrial wastewater according to claim 2, wherein in step S103, the screened sample is stored in a wide-mouth bottle, and the wide-mouth bottle is dried in a drying oven at 60 ℃ for 2 hours with the mouth opened.
6. The method for determining index of degradable organic carbon in industrial wastewater as claimed in claim 2, wherein in step S105, 0.07g of the dried and cooled sample is weighed and placed in a 250mL triangular flask, and 20mL of K with concentration of 0.4mol/L and weight of 1/6 of the sample is added 2 Cr 2 O 7 -H 2 SO 4 The solution was mixed and shaken well.
7. The method as claimed in claim 2, wherein in step S106, the sample is placed in a glycerol bath heated to 185-195 ℃ and kept boiling at 170-180 ℃ for 5 minutes.
8. The novel method for measuring the index of the degradable organic carbon in the industrial wastewater according to claim 2, wherein 120mL of distilled water is added in step S107, and then 3 drops of the o-phenanthroline indicator are added.
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| CN104280512A (en) * | 2013-07-10 | 2015-01-14 | 中国科学院沈阳应用生态研究所 | Method for determining organic matters in soil |
| US20150247787A1 (en) * | 2012-10-05 | 2015-09-03 | Allan James Yeomans | Method of and apparatus for determining the carbon content of soils |
| CN113567615A (en) * | 2021-07-29 | 2021-10-29 | 上海城市水资源开发利用国家工程中心有限公司 | Novel DOC index determination method for degradable organic carbon in sludge |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590442A (en) * | 2012-02-07 | 2012-07-18 | 中粮生物化学（安徽）股份有限公司 | Determination method for organic carbon |
| US20150247787A1 (en) * | 2012-10-05 | 2015-09-03 | Allan James Yeomans | Method of and apparatus for determining the carbon content of soils |
| CN104280512A (en) * | 2013-07-10 | 2015-01-14 | 中国科学院沈阳应用生态研究所 | Method for determining organic matters in soil |
| CN113567615A (en) * | 2021-07-29 | 2021-10-29 | 上海城市水资源开发利用国家工程中心有限公司 | Novel DOC index determination method for degradable organic carbon in sludge |
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