Device and method for on-line measuring biochemical oxygen demand in sample

A biochemical oxygen demand, sample technology, applied in the direction of electrochemical variables of materials, etc., to achieve the effects of low cost, reduced manual workload, and shortened measurement cycle

Inactive Publication Date: 2008-12-03
INST OF PROCESS ENG CHINESE ACAD OF SCI
View PDF0 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a stable, fast, accurate and widely applicable on-line BOD measuring device for the deficiencies of existing BOD measuring devices, and to solve the technical problems existing in traditional BOD measuring devices

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for on-line measuring biochemical oxygen demand in sample

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] See figure 1 . The device for online determination of biochemical oxygen demand in samples includes: BOD sample pool 1, sample feed pump 2, pipeline filter 3, sterilizing filter membrane 4, BOD sampling feedback control valve 5, dilution buffer storage tank 6, dilution Buffer solution feeding pump 7, diluted buffer solution sampling feedback control valve 8, upflow microbial fuel cell 9, anode 10, cathode 11, external resistor 12, A / D conversion card 13, microbial fuel cell circulation pump 14, microbial fuel Battery cycle feedback control valve 15, sample collection container 16, data acquisition processing and feedback control valve control computer system 17;

[0045] The discharge port of the BOD sample pool 1 is connected with the sample feed pump 2 through the pipeline, the discharge port of the sample feed pump 2 is connected with the feed port of the pipeline filter 3 through the pipeline, and the pipeline filter 3 The discharge port is connected to the polyte...

Embodiment 2

[0053] The device for online determination of biochemical oxygen demand in the sample is the same as in Example 1. The concentration of eutrophic BOD was determined by pulse integration method. The sample is 2mmol / L sodium acetate solution. At this time, the voltage signal at both ends of the external resistance detected by the data acquisition process and the feedback control valve control computer system is 100mV, which is higher than the set value. The pulse integration method is selected to measure the concentration of eutrophic BOD. Then close the dilution buffer sampling feedback control valve, open the microbial fuel cell cycle feedback control valve, control the BOD sampling feedback control valve to realize pulsed sampling, close the BOD sampling feedback control valve, and the sample enters the upflow microbial fuel cell. , flows out from the top, enters the upflow microbial fuel cell again through the microbial fuel cell cycle feedback control valve and the microbia...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a device and a method for carrying out on-line detection of the biochemical oxygen demand (BOD) in a water body sample by utilizing a microbiological fuel cell. The detection device has the advantages of real-time and on-line continuous detection function, simple operation, long continuous working time, and lower use and maintenance costs. The upwelling microbiological fuel cell is taken as the core, a BOD sample enters the microbiological fuel cell directly or after being diluted, and a linear relation exists between the coulomb yield of the microbiological fuel cell and the BOD content of the sample, thereby obtaining the BOD content of the sample through detecting the electrical signal generated by the microbiological fuel cell and through analyzing the obtained data by a computer control system. The detection method includes detecting the oligotrophic BOD concentration with the BOD concentration value in the sample less than critical value, and the eutrophic BOD concentration with the BOD concentration value in the sample larger than critical value; the detection of the eutrophic BOD concentration can be completed by adopting a buffer solution dilution method or a pulse integration method.

Description

technical field [0001] The invention relates to a device and method for on-line measurement of biochemical oxygen demand (BOD) in water samples by using a microbial fuel cell. The measurement device has a real-time online continuous measurement function, simple operation, long continuous and stable working time, Use and maintenance costs are relatively low. Background technique [0002] Biochemical oxygen demand (BOD) of water body is an important indicator of water quality evaluation. Through the measurement of BOD, we can understand the biodegradability of sewage, the pollution load of sewage receiving body, and the self-purification ability of water body. Therefore, BOD monitoring is very important in environmental monitoring, water treatment engineering design and process control. [0003] Now, the standard method for BOD widely used in the world is BOD 5 Assay. That is, the samples were cultured at 20(±1)°C for 5 days, and the dissolved oxygen before and after the cu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/42G01N27/30G01N27/26
Inventor 杜竹玮佟萌李少华李浩然
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap