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Microbial sensor detection assembly for BOD rapid determinator

A microbial sensor and rapid measurement technology, applied in instruments, scientific instruments, testing water, etc., can solve problems such as difficulty for operators, increase operating costs, and low work efficiency, save time and manpower, reduce equipment loss, The effect of improving work efficiency

Pending Publication Date: 2020-04-24
清池水环境治理科技发展(天津)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. Since the dissolved oxygen electrode, the microbial film, and the cell body are assembled and joined by rotary extrusion, mutual friction will occur when the three contact each other, especially when the screw is tight, resulting in greater friction between the contact surfaces , causing deformation or even damage to microbial membranes and oxygen-permeable membranes
The application practice has proved that the damage rate of microbial film and oxygen permeable film is high, which directly affects the normal use of the instrument, reduces the working efficiency of the analyzer and increases the operating cost
[0007] 2. Since the microbial membrane is a consumable, it needs to be replaced at any time. In this way, when assembling and replacing the microbial membrane, it is necessary to invert the dissolved oxygen electrode and the cell body, and disconnect the gas and liquid pipelines connected to the flow cell, resulting in cumbersome operations. , time-consuming and labor-intensive
[0008] 3. In the existing flow tank, the microbial membrane is directly placed in the membrane tank of the tank body. Every time the operator needs to take the thin, soft and fragile microbial membrane directly, it brings difficulty to the operator, low work efficiency and extremely easy damage to the microbial film

Method used

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  • Microbial sensor detection assembly for BOD rapid determinator
  • Microbial sensor detection assembly for BOD rapid determinator
  • Microbial sensor detection assembly for BOD rapid determinator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Installation time-consuming comparison:

[0046] The dissolved oxygen electrode 1 is screwed into the electrode engaging screw hole 41 of the fixed platen 4 through its electrode external thread 13, and the oxygen-permeable membrane end 12 protrudes from the bottom surface of the fixed platen to the position where the depth of the film protection plate is fixed by the electrode. The nut 5 is screwed down and locked on the fixed platen 4; the film protection plate 3 bonded with the microbial film 25 is put into the film plate groove 21, and the pool fixing nut 7 is continuously tightened so that the pool body 20 and the film protection plate 3 The microbial membrane 25 inside is squeezed close to the dissolved oxygen electrode 1 until the microbial membrane 25 is closely attached to the oxygen-permeable membrane end 12 of the dissolved oxygen electrode 1 and the screw is stopped, and the installation is completed. After counting the time of hundreds of installations, the...

Embodiment 2

[0048] Installation success rate comparison:

[0049] Step 1: Continuously tighten the flow cell fixing nut 7 so that the cell body 20 and the microbial film 25 in the membrane protection disc 3 are squeezed toward the oxygen-permeable membrane end 12 of the dissolved oxygen electrode 1 until the microbial film 25 and the dissolved oxygen electrode 1 The oxygen-permeable membrane end 12 fits and stops screwing, and the installation is completed.

[0050] Step 2: Loosen the fixing nut 7 of the flow cell, so that the cell body 20 and the microbial membrane 25 in the membrane protection disc 3 are away from the oxygen-permeable membrane end 12 of the dissolved oxygen electrode 1 until they are completely separated.

[0051] Repeat step 1 and step 2 one hundred times, and the installation success rate is 100%, that is, neither the microbial membrane 25 nor the oxygen-permeable membrane 14 is damaged or wrinkled during the repeatability test of the installation process. It can be ...

Embodiment 3

[0053] Comparison of test results:

[0054] Step 1: adopt the present invention to be installed on measuring instrument and do test result standard curve;

[0055] Step 2: Use the traditional structure and installation method to make the standard curve of the test results.

[0056] The test results are shown in Table 1:

[0057] Comparison of test results Table 1

[0058]

[0059] It can be known that there is no significant difference between the test effect of the present invention and the test effect of the traditional method.

[0060] From the above examples, it can be concluded that the change of the structure of the present invention only shortens the installation time, improves the installation efficiency, avoids the damage of the microbial film and the oxygen permeable film, has no influence on the test results of the instrument, and can still achieve the test of the traditional method Accuracy and Precision.

[0061] In summary, it can be seen that, compared wi...

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Abstract

The invention relates to a microbial sensor detection assembly for a BOD rapid determinator. The microbial sensor detection assembly comprises a dissolved oxygen electrode and a flow cell, wherein thedissolved oxygen electrode comprises an electrode body, a lead end, an oxygen permeable membrane end and an electrode external thread; and the flow cell comprises a cell body and a microbial membrane. The microbial sensor detection assembly is characterized in that an electrode fixing nut sleeves the electrode external thread; an elastic flexible flat-bottom membrane protection disc is arranged,the microbial membrane is placed in the disc, and the membrane protection disc is arranged in a membrane disc groove of the flow cell; a fixed bedplate is arranged, an electrode meshing screw hole isformed in the center of the fixed bedplate, bolt fixing holes are formed in the left side and the right side of the fixed bedplate, and cell fixing bolts are fixed in the bolt fixing holes; the dissolved oxygen electrode is screwed into the electrode meshing screw hole, the length of extending out of the bottom surface of the fixed bedplate at the end of the oxygen permeable membrane is the depthposition of the membrane protection disc and the dissolved oxygen electrode is locked on the upper side of the fixed bedplate through an electrode fixing nut; two bolt through holes of the cell body sleeve cell fixing bolts to move upwards, and cell fixing nuts are screwed to be locked on the lower side of the fixed bedplate at the position where the microbial membrane is tightly attached to the oxygen permeable membrane. The assembly has the advantages of avoiding damage to the microbial membrane and the oxygen permeable membrane and being simple to operate.

Description

technical field [0001] The invention relates to the technical field of rapid BOD detectors, in particular to a microbial sensor detection component for a rapid BOD detector. Background technique [0002] Biochemical Oxygen Demand (hereinafter referred to as BOD) is an indicator that uses the amount of dissolved oxygen (DO) consumed by microbial metabolism to indirectly indicate the degree of water body pollution by organic matter. Its definition is: within a certain period of time , the amount of free oxygen consumed by aerobic microorganisms to oxidize and decompose organic matter per unit volume of water, expressed in mg / L of oxygen, is one of the most important water quality detection indicators in environmental monitoring and pollution control work, and is mainly used in the detection of water bodies Pollution by organic pollutants. In the monitoring and evaluation of the pollution status of natural water bodies such as reservoirs, lakes, and rivers, because the BOD ind...

Claims

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Application Information

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IPC IPC(8): G01N27/31G01N33/18
CPCG01N27/31G01N33/1806
Inventor 王德龙闫志明刘和煦居文健李续李霞尹彦勋陈曦张玉惠王琳王悦
Owner 清池水环境治理科技发展(天津)有限公司