GB1329440A - Method for detecting organic biodegradable pollution and apparatus therefor - Google Patents
Method for detecting organic biodegradable pollution and apparatus thereforInfo
- Publication number
- GB1329440A GB1329440A GB5522770A GB5522770A GB1329440A GB 1329440 A GB1329440 A GB 1329440A GB 5522770 A GB5522770 A GB 5522770A GB 5522770 A GB5522770 A GB 5522770A GB 1329440 A GB1329440 A GB 1329440A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxygen
- pump
- started
- sleeve
- enrichment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 title abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 8
- 229910052760 oxygen Inorganic materials 0.000 abstract 8
- 239000001301 oxygen Substances 0.000 abstract 8
- 230000015654 memory Effects 0.000 abstract 3
- 238000010276 construction Methods 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- 230000008602 contraction Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 abstract 1
- 238000000840 electrochemical analysis Methods 0.000 abstract 1
- 238000002848 electrochemical method Methods 0.000 abstract 1
- 230000005484 gravity Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 230000036284 oxygen consumption Effects 0.000 abstract 1
- 230000035484 reaction time Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1806—Biological oxygen demand [BOD] or chemical oxygen demand [COD]
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Analytical Chemistry (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Emergency Medicine (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
1329440 Electro-chemical analysis OMNIUM D' ASSAINISSEMENT 20 Nov 1970 [21 Nov 1969] 55227/70 Heading G1N A method of determining the organic biodegradable pollution of a liquid comprises (i) making an electro-chemical measurement of the variation in oxygen content over a period of time (and hence the oxygen consumption per unit time) (ii) repeating the measurement after the sample has been oxygen enriched (iii) noting the variation in consumption over successive periods. In one arrangement Fig.4, a measuring cell 1 is connected to a recorder 15, and supplied with samples from an oxygen enrichment tank (aereator) 4 by a pump 8. The recorder is provided with limit contacts d 1 , d 2 , and when the oxygen content reaches a level d2 (point a on Fig.7,) the pump is stopped. When the transitory disturbance has finished, (arbitrarily determined by a slightly lower oxygen level dl), a timer is started for the measuring period. At the end of the predetermined time interval, point c, the pump is started for a further cycle. The oxygen consumed during the timed interval equals b-c. Alternative constructions:- (i) enriched sample may be supplied by gravity with solenoid controlled valve (12) replacing the pump Fig. 5 (not shown). (ii) air (or oxygen) may be admitted to the test cell for enrichment Fig.6 (not shown). (iii) a variable volume container may be used Figs.12, 13, (not shown) comprising an elastic "sleeve" which can be expanded by vacuum to fill a surrounding tank (so that a longer reaction time is provided for liquid flowing through the enlarged "sleeve". Alternative circuits:- block diagram circuits are described in which Fig. 8 (not shown) threshold detectors (D1, D2) replace the limit switch d1, d2 to control a logic circuit in conjunction with the timer contact (Te) whereby (i) the value C is locked in a memory during the next cycle and (ii) the enrichment pump is started. With the variable volume construction contacts may be operated to gate memory circuits in synchronism with the expansion and contraction of the "sleeve" , whereby the difference in oxygen concentration is determined, Fig.15 (not shown) or in Fig.16 a threshold circuit CD may gate the memories M1, M2 to store the peaks and troughs from the sensor circuit to feed to the subtractor CS.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR6940210A FR2067184A1 (en) | 1969-11-21 | 1969-11-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1329440A true GB1329440A (en) | 1973-09-05 |
Family
ID=9043446
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5522770A Expired GB1329440A (en) | 1969-11-21 | 1970-11-20 | Method for detecting organic biodegradable pollution and apparatus therefor |
Country Status (7)
Country | Link |
---|---|
BE (1) | BE759071A (en) |
CH (1) | CH522880A (en) |
DE (1) | DE2056973A1 (en) |
ES (1) | ES385752A1 (en) |
FR (1) | FR2067184A1 (en) |
GB (1) | GB1329440A (en) |
NL (1) | NL7017124A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113295827A (en) * | 2021-05-24 | 2021-08-24 | 成都新绿之源科技有限公司 | Detection system for oxygen-containing dressing to release oxygen |
CN115636499A (en) * | 2022-10-24 | 2023-01-24 | 苏州清初环境科技有限公司 | Biodegradability determination method without constant temperature condition |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2843074A1 (en) * | 1978-10-03 | 1980-04-10 | Boehringer Mannheim Gmbh | METHOD FOR REGULATING AND / OR CONTROLLING A BIOLOGICAL WASTEWATER PLANT |
FR2539875B1 (en) * | 1983-01-24 | 1986-03-21 | Ugine Kuhlmann | METHOD AND APPARATUS FOR DETECTION OF TOXIC SUBSTANCES IN WASTE WATER SUPPLYING A BIOLOGICAL TREATMENT STATION |
CN109238926B (en) * | 2018-11-27 | 2024-05-28 | 扬州大学 | Device and method for simulating pollutant migration rule in dry-wet alternating mode |
-
0
- BE BE759071D patent/BE759071A/en unknown
-
1969
- 1969-11-21 FR FR6940210A patent/FR2067184A1/fr active Pending
-
1970
- 1970-11-18 CH CH1704170A patent/CH522880A/en not_active IP Right Cessation
- 1970-11-20 GB GB5522770A patent/GB1329440A/en not_active Expired
- 1970-11-20 ES ES385752A patent/ES385752A1/en not_active Expired
- 1970-11-20 DE DE19702056973 patent/DE2056973A1/en active Pending
- 1970-11-23 NL NL7017124A patent/NL7017124A/xx unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113295827A (en) * | 2021-05-24 | 2021-08-24 | 成都新绿之源科技有限公司 | Detection system for oxygen-containing dressing to release oxygen |
CN115636499A (en) * | 2022-10-24 | 2023-01-24 | 苏州清初环境科技有限公司 | Biodegradability determination method without constant temperature condition |
Also Published As
Publication number | Publication date |
---|---|
BE759071A (en) | 1971-04-30 |
ES385752A1 (en) | 1974-06-01 |
FR2067184A1 (en) | 1971-08-20 |
NL7017124A (en) | 1971-05-25 |
CH522880A (en) | 1972-05-15 |
DE2056973A1 (en) | 1971-05-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |