CN1059206A - Sewage biochemical oxygen demand (BOD) rapid assay methods - Google Patents
Sewage biochemical oxygen demand (BOD) rapid assay methods Download PDFInfo
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- CN1059206A CN1059206A CN 91101749 CN91101749A CN1059206A CN 1059206 A CN1059206 A CN 1059206A CN 91101749 CN91101749 CN 91101749 CN 91101749 A CN91101749 A CN 91101749A CN 1059206 A CN1059206 A CN 1059206A
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Abstract
Sewage biochemical oxygen demand (BOD) rapid assay methods is the variable quantity by METHOD FOR CONTINUOUS DETERMINATION biological sludge dissolved oxygen concentration in the sewage biochemical reaction process, fast measuring and BOD
5Corresponding BOD parameter.Test duration is 5～10 minutes.Whole mensuration process is carried out under constant temperature, constant speed stirring, constant aeration condition.Can conveniently form BOD fast measuring instrument according to this method, be applicable to that light textile, food, petrochemical industry, doctor defend, smelting ore deposit, the energy and sanitary sewage monitoring, be specially adapted to pollution source monitoring, sewage treatment project site controling management and on-line testing.
Description
The present invention relates to the environment supervision instrument analytical approach of a kind of sewage biochemical oxygen demand (BOD) fast measuring.
BOD is an important indicator of environmental monitoring and water pollution control.Proposed by the wastewater treatment council of Britain imperial family in 1912, and the standard testing analytical approach-BOD that uses till today in countries in the world
5Method needs to measure 5 days forward and backward dissolved oxygen DOs (DO) through 20 ℃, 5 days biochemical cultivations of constant temperature, and calculated difference obtains, and its value is subjected to the influence of water sample composition, pH value, temperature, culture environment condition, time, factor such as nitrated.BOD
5Bring many difficulties for practical application, especially in engineering management of sewage disposal,, can't adapt to field control and closed loop adjustment, more can not carry out on-line monitoring owing to needed 5 days to go out data.
In recent years, BOD determining instrument and fast measuring instrument, method have been carried out a large amount of investigations both at home and abroad, proposed many new equipments, new method: 1. Hua Boshi respirometer; 2. electric coulombmeter; 3. differential pressure gauge; 4.DO instrumental method; 5. microbial film oxygen electrode method; 6. aeration type oxygen electrode method.The 1st～4 quasi-instrument still needs 5 days constant temperature culture, has used instrumental method when DO tests instead.The 5th quasi-instrument is used the oxygen electrode that covers microbial film, be a kind of rapid assay methods, but film utmost point Jiao is tender, and lack and the influence application serviceable life.The 6th quasi-instrument adopts the area integral (can be referred to as " biochemical integral method ") of METHOD FOR CONTINUOUS DETERMINATION biological sludge DO change curve in the sewage biochemical reaction process, after converting, the oxygen conversion coefficient gets the BOD value, measure fast, be applicable to the field control analysis, existing problems are because DO equilibrium value variation before and after the sample introduction, influence quadrature and cause error bigger, poor repeatability; Different dilute concentration sewage integrations are disproportionate, and the BOD linearity is not high; The high-concentration sewage test duration is long; It is time-consuming to ask for the oxygen conversion coefficient.
Task of the present invention is a kind of and BOD of design
5Correlativity is arranged, test simple and direct, linearity height, good reproducibility, widely applicable, adopt the BOD rapid assay methods of aeration type oxygen electrode method, can be applicable to wastewater treatment field control and on-line monitoring.
Assay method such as flow process are shown in Figure 4
Fig. 1 is seen in the DO curvilinear motion during mensuration.Can carry out at Fig. 2 device during mensuration.WS-constant temperature oven among Fig. 2; The SP-reaction bulb; The DB-stirrer; The DJ-potential electrode; The QB-air pump; The YC-DO instrument; The JL-registering instrument.Can be described as " biochemical error of measurement method ".
The characteristics of the inventive method are: 1. instrument is realized conveniently according to customer requirements, can being designed to the instrument-water bath with thermostatic control of plain type BOD fast measuring, stirrer, air pump and DO analyzer, also can form full-automatic BOD on-line monitoring instrument.2. test operation is easy, need not preliminary work, as long as start is treated can test after the DO balance.3. the test duration weak point helps site controling management.4. the standard specimen source is abundant, and preparation is convenient, and the similar low carbon chain Zhi Lian Hydrocarbon material of all genus Yi Suan Na all can be used as standard specimen.5. good reproducibility, linearity height is with BOD
5Correlativity is arranged, be fit to the sewage analaysis test request.
Embodiment:
Example 1. is pressed Fig. 2 device design YWC type BOD microcomputer fast measuring instrument.The apparatus structure block diagram is seen Fig. 3.Among the figure: WS-constant temperature biochemical reaction case; The QB-air pump; The LJ-flowmeter; RL-heating/refrigerator; The DB-magnetic stirrer; SP-biochemical reaction bottle; The DJ-potential electrode; YF-electrode DO signal amplifier; WF-electrode temperature signal amplifier; The DK-electronic switch; AD-simulating signal/digital signal converter; CPU-microcomputer central processing unit and peripheral components; The DY-printer; The JL-registering instrument; The XS-LED display; The JP-keyboard; ZS-working station indicator group; XZ-parameter correction device; The KZ-microcomputer is to the WS control interface.SP volume 700ml.DJ is made up of polarogram type oxygen electrode+temperature sensor AD 590 and film compensating resistance.30 ℃ of constant temperature set-points.Standard specimen is Yi Suan Na.When measuring Minsheng Pharmaceutical Factory, Hangzhou City.'s sewage, when the standard specimen weight concentration is 1500mg/L Hangzhou Brewery sewage, the standard specimen weight concentration be 1000mg/L other be 500mg/L.
Example 2 is pressed Fig. 2 and is formed test unit by DO analyzer, water bath with thermostatic control, biochemical reaction bottle, magnetic stirrer and micro air pump.Given 20 ℃ of temperature.Do not connect registering instrument.The employing glacial acetic acid is a standard specimen.Standard specimen concentration 250mg/L, instrument has good rapidity.
Test shows that example 1 and example 2 have fine consistance.
The BOD test findings:
| Sewage source | The mud source | BOD 5 | Instrument BOD | Error (%) |
| Hangzhou Refinery | The oil refining sewerage treatment pond | 89 | 80 | -11.25 |
| Hangzhou Dyeing and Printing Factory | The dyeing and printing sewage treatment pond | 190 | 205 | + 7.32 |
| Minsheng Pharmaceutical Factory, Hangzhou City. | Refinery sludge | 794 | 660 | -16.87 |
| Xinhua Paper Making Mill | Refinery sludge | 239 | 209 | -14.35 |
| Hangzhou Brewery | Printing and dyeing sludge | 465 | 497 | +6.4 |
Claims (3)
1, a kind of sewage BOD rapid assay methods under constant temperature, constant speed stirring, constant aeration condition, is come evaluation by the DO concentration change in sewage biochemical treatment course of reaction of the oxygen electrode METHOD FOR CONTINUOUS DETERMINATION biological sludge in the biochemical reaction bottle; The difference △ DO sewage sample of DO decline valley behind standard specimen BOD coefficient conversion, obtains the BOD value corresponding with BOD5 after it is characterized in that asking for the DO equilibrium value and advancing the sewage sample; Biological sludge also can be selected for use without the aerobe mud of taming; Standard specimen adopts the low carbon chain straight chain hydrocarbon.
2,, it is characterized in that standard specimen BOD coefficient equals standard specimen BOD according to the described BOD rapid assay methods of claim 1
5Divided by △ DO standard specimen.
3,, it is characterized in that standard specimen can be processed into the BOD that estimates with sewage sample to be measured according to the described BOD rapid assay methods of claim 1
5Be worth suitable Different Weight concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91101749 CN1020960C (en) | 1991-03-16 | 1991-03-16 | Quick determination for waste water bod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91101749 CN1020960C (en) | 1991-03-16 | 1991-03-16 | Quick determination for waste water bod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1059206A true CN1059206A (en) | 1992-03-04 |
| CN1020960C CN1020960C (en) | 1993-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91101749 Expired - Fee Related CN1020960C (en) | 1991-03-16 | 1991-03-16 | Quick determination for waste water bod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1020960C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1327968C (en) * | 2005-06-01 | 2007-07-25 | 北京清能创新科技有限公司 | Constant tempeature reactor for reactor type biochemical oxygen-demand rapid measuring instrument |
| CN101957356A (en) * | 2010-08-13 | 2011-01-26 | 北京工业大学 | Biochemical oxygen demand BOD soft measurement method based on elastic radical basis function neural network |
| CN101477105B (en) * | 2009-01-16 | 2012-01-25 | 淮阴工学院 | Rapid measuring method for high-salt industrial waste water BOD |
| CN102365547A (en) * | 2009-03-25 | 2012-02-29 | 恩德莱斯和豪瑟尔测量及调节技术分析仪表两合公司 | Method for operating an analysis device |
| CN109709197A (en) * | 2019-01-24 | 2019-05-03 | 天津市赛普新锐仪器科技有限公司 | BOD Quick testing instrument and accurately compensate measuring method |
-
1991
- 1991-03-16 CN CN 91101749 patent/CN1020960C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1327968C (en) * | 2005-06-01 | 2007-07-25 | 北京清能创新科技有限公司 | Constant tempeature reactor for reactor type biochemical oxygen-demand rapid measuring instrument |
| CN101477105B (en) * | 2009-01-16 | 2012-01-25 | 淮阴工学院 | Rapid measuring method for high-salt industrial waste water BOD |
| CN102365547A (en) * | 2009-03-25 | 2012-02-29 | 恩德莱斯和豪瑟尔测量及调节技术分析仪表两合公司 | Method for operating an analysis device |
| CN102365547B (en) * | 2009-03-25 | 2014-08-13 | 恩德莱斯和豪瑟尔测量及调节技术分析仪表两合公司 | Method for operating an analysis device |
| US9023657B2 (en) | 2009-03-25 | 2015-05-05 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | Method for operating an analytical apparatus |
| CN101957356A (en) * | 2010-08-13 | 2011-01-26 | 北京工业大学 | Biochemical oxygen demand BOD soft measurement method based on elastic radical basis function neural network |
| CN101957356B (en) * | 2010-08-13 | 2013-07-10 | 北京工业大学 | Biochemical oxygen demand BOD soft measurement method based on elastic radical basis function neural network |
| CN109709197A (en) * | 2019-01-24 | 2019-05-03 | 天津市赛普新锐仪器科技有限公司 | BOD Quick testing instrument and accurately compensate measuring method |
| CN109709197B (en) * | 2019-01-24 | 2024-01-12 | 天津市赛普新锐仪器科技有限公司 | BOD rapid tester and accurate compensation testing method |
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| Publication number | Publication date |
|---|---|
| CN1020960C (en) | 1993-05-26 |
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