GB1329440A - Method for detecting organic biodegradable pollution and apparatus therefor - Google Patents

Method for detecting organic biodegradable pollution and apparatus therefor

Info

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
Application number
GB5522770A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OMNIUM DASSAINISSEMENT
Original Assignee
OMNIUM DASSAINISSEMENT
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by OMNIUM DASSAINISSEMENT filed Critical OMNIUM DASSAINISSEMENT
Publication of GB1329440A publication Critical patent/GB1329440A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18Water
    • G01N33/1806Biological 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.
GB5522770A 1969-11-21 1970-11-20 Method for detecting organic biodegradable pollution and apparatus therefor Expired GB1329440A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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