Determination of activated sludge concentration

A measurement method and activated sludge technology, applied in chemical method analysis, chemical analysis by titration method, measuring device, etc., can solve problems such as inaccurate test results, achieve low cost, high repeatability, and low detection cost Effect

Inactive Publication Date: 2019-10-25
北京恩菲环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a kind of assay method of activated sludge concentration, to solve the inaccurate problem of the test result obtained when the existing method of testing activated sludge concentration is applied to activated sludge containing volatile and easy sublimation

Method used

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  • Determination of activated sludge concentration
  • Determination of activated sludge concentration
  • Determination of activated sludge concentration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Calibration of ferrous sulfate standard solution

[0040] Before each use, 0.2mol / L ferrous sulfate standard solution needs to be calibrated with 0.1mol / potassium dichromate standard solution. Draw 0.1mol / L potassium dichromate standard solution 20mL and 150mL Erlenmeyer flask, add concentrated sulfuric acid 3~5mL and 2~3 drops of phenanthroline indicator, and titrate with ferrous sulfate standard solution. According to the consumption of ferrous sulfate standard solution titration, the following formula is calculated:

[0041]

[0042] c 1 —concentration of potassium dichromate standard solution (mol / L); V 1 - Draw the volume of potassium dichromate standard solution (mL);

[0043] V 2 ——The volume of ferrous sulfate standard solution consumed during titration (mL).

[0044] (2) Digestion reaction.

[0045] Take 1mL of activated sludge in a 100mL volumetric flask and dilute to the mark with distilled water. Take 1 mL of the sample in the volumetric flask ...

Embodiment 2

[0060] The difference with Example 1 is: no blank test is carried out.

[0061] The calculated concentration of activated sludge is 5.75g / L, and the accuracy of the test result is 99.65%.

Embodiment 3

[0063] The difference with Example 1 is: the concentration of iron sulfate standard solution is 0.192mol / L.

[0064] The calculated concentration of activated sludge is 5.70g / L, and the accuracy of the test result is 99.48%.

[0065] From the above description, it can be seen that the above-mentioned embodiments of the present invention have achieved the following technical effects:

[0066] Compared with dry sludge as the measurement object, this application directly takes the mud-water mixture containing activated sludge as the measurement object. This can save the step of drying the sludge and simplify the measurement process. At the same time, the above-mentioned test method can eliminate the interference of volatile and easily sublimable inorganic substances on the measurement results of activated sludge concentration and organic matter content, so that the measurement results are accurate, the properties of activated sludge can be accurately characterized, and the norma...

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Abstract

The invention provides a determination of activated sludge concentration. The activated sludge is a muddy water mixture containing an organic matter and easy to volatile and easy to sublimate, and theorganic matter is represented through a general formula C5H7NO2, the determination method comprises the following steps: S1, enabling the activated sludge, water, a potassium dichromate solution andconcentrated sulfuric acid to perform digestion reaction under boiled water bath heating to obtain a digestion product, and collecting the first steam produced in the boiled water bath heating process; S2, combining the digestion product with the first steam, and preparing a to-be-determined sample standard solution; and S3, taking the phenanthroline as an indicator, titrating the to-be-determinedsample standard solution by adopting a ferrous sulfate standard solution, and computing to obtain the organic matter content in the activated sludge according to the volume V1 of the ferrous sulfatestandard solution consumed by the to-be-determined sample standard solution. The testing method disclosed by the invention has the advantages of being accurate in an accurate result, low in cost and high in repeatability.

Description

technical field [0001] The invention relates to the field of activated sludge treatment, in particular to a method for measuring the concentration of activated sludge. Background technique [0002] At present, the activated sludge method is one of the most commonly used secondary treatment methods in municipal sewage treatment plants. In actual production, it is necessary to regularly measure the activated sludge concentration, organic matter content and other indicators to characterize the sludge properties and play a guiding role in maintaining the normal operation of the system, so the accuracy of the measurement results is highly required. At this stage, the determination methods of activated sludge concentration and organic matter content are usually gravimetric method and burning method, but the results of this method are inaccurate for activated sludge containing volatile and easily sublimable inorganic substances. The main reason for the above problems is that the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16G01N1/28G01N1/44
CPCG01N1/28G01N1/44G01N31/162
Inventor 麻倩崔骁卢东昱张强马效贤
Owner 北京恩菲环保技术有限公司
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