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Method for online determination of pore complexity of particulate matters in water

A technology with a high degree of complexity and particulate matter, applied in the direction of measuring devices, suspension and porous material analysis, instruments, etc., to achieve the effect of simple equipment maintenance

Active Publication Date: 2020-08-14
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above defects of the prior art, the present invention provides a method for online determination of the complexity of the pores of particulate matter in water. Impedance feedback signal, and calculate the spectral dimension d of the particle impedance feedback signal during scanning s , which characterizes the pore complexity of particles

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  • Method for online determination of pore complexity of particulate matters in water
  • Method for online determination of pore complexity of particulate matters in water
  • Method for online determination of pore complexity of particulate matters in water

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Embodiment 1

[0044]Activated sludge (denoted as sludge 1) was taken from a membrane bioreactor with a daily water treatment capacity of 100,000 tons in a reclaimed water plant in Beijing (denoted as reclaimed water plant 1) as the particulate matter to be measured. The sludge concentration was 17.9g / L. Other assay processes are consistent with those described in the detailed description. The obtained lgP and lgf are shown in Table 3. The spectral dimension of the obtained sludge 1 is 1.826.

Embodiment 2

[0046] The remaining activated sludge (denoted as sludge 2) was taken from a reclaimed water plant in Beijing (recorded as reclaimed water plant 2) with a daily water treatment capacity of 200,000 tons of anaerobic / anoxic / aerobic biological reaction process as the particulate matter to be measured. The sludge concentration was 18.1g / L. Other assay processes are consistent with those described in the detailed description. The obtained lgP and lgf are shown in Table 3. The spectral dimension of the obtained sludge 2 is 1.811.

Embodiment 3

[0048] The remaining activated sludge (denoted as sludge 3) was taken from a reclaimed water plant in Beijing (recorded as reclaimed water plant 3) with a daily water treatment capacity of 1 million tons of anaerobic / aerobic biological reaction process as the particulate matter to be measured. The sludge concentration is 18g / L. Other assay processes are consistent with those described in the detailed description. The obtained lgP and lgf are shown in Table 3. The spectral dimension of the obtained sludge 3 is 1.819.

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Abstract

The invention discloses a method for online determination of the pore complexity of particulate matters in water, and belongs to the technical field of environmental protection. The invention aims tosolve the problems that an existing method is difficult to meet actual online control requirements and the like. An electrochemical impedance meter connected with a conductivity electrode is used forcarrying out real-time frequency scanning on a particulate matter suspension; a particle spectral dimension ds formed by an impedance feedback signal in the scanning process is used for representing the complexity of particle pores, it is assumed that electrons walk randomly in the pores in the scanning process, and the probability that the same electron appears at the same position is directly associated with the spectral dimension ds of the particle impedance feedback signal. The larger ds is, the lower the probability that electrons appear at the same position of the pores is, and the morecomplex the corresponding pore structure is. A sample does not need to be subjected to special treatment during the test, only the electrode probe is inserted into the to-be-tested particle suspensionto carry out frequency scanning, the equipment maintenance is relatively simple, and the real-time analysis control requirement of the particulate matters in the water can be met.

Description

[0001] Technical field [0002] The invention relates to an online method for measuring the complexity of particle pores in water, and belongs to the technical field of environmental protection. Background technique [0003] The complexity of the pores of particulate matter in water (such as activated sludge, etc.) has a significant impact on the adsorption and filtration of particulate matter, and is also related to the migration and transformation of pollutants in water. Therefore, real-time determination of the pore complexity of particulate matter in water is of great importance for the control of these processes. At present, the methods for characterizing particle pores in water mainly include specific surface area measurement method, microscopic image method and computer tomography (CT) scanning method, etc. Among them, the specific surface area measurement method is to press a gas (such as nitrogen) or a non-wetting liquid (such as mercury) into the pores of the partic...

Claims

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Application Information

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IPC IPC(8): G01N15/08G01N27/02G01N27/26
CPCG01N15/088G01N27/02G01N27/26
Inventor 王毅力张达鑫李俊仪樊晓阳高诗卉李恩锐韩志博
Owner BEIJING FORESTRY UNIVERSITY
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