An automated instrument for monitoring oxygen demand in polluted waters

A. J. Guwy; L. A. Farley; P. Cunnah; F. R. Hawkes; D. L. Hawkes; M. Chase; H. Buckland

doi:10.1016/S0043-1354(99)00202-X

An automated instrument for monitoring oxygen demand in polluted waters

A. J. Guwy^*, L. A. Farley, P. Cunnah, F. R. Hawkes, D. L. Hawkes, M. Chase, H. Buckland

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

An automated instrument is described which measures the oxygen demand of the organic content of a fluid based on oxidation by hydrogen peroxide with UV light. Residual hydrogen peroxide remaining after oxidation of the organic compounds is determined by gas liberated from H₂O₂ decomposition by catalase, measured by a low flow gas meter. Oxygen produced by the internal chain reaction of H₂O₂ with hydroxyl free radicals is also measured and since the amount of peroxide added is known, the amount of peroxide used to oxidize the organic compounds can be calculated. A linear relationship between organic strength (measured as COD or BOD) and the output of the instrument was obtained for dilutions of raw sewage (25-150 mg l^-1 COD and undetectable to 54 mg l^-1 BOD), a synthetic sewage (100-1400 mg l^-1 COD and 68-952 mg l^-1 BOD) and effluents from a creamery (50-600 mgl^-1 COD) and potato processing factory (50-350 mg l^-1 COD). The instrument is fully automated in the present version giving one sample measurement every 55 min and could be used on-line as the basis of a control strategy for wastewater treatment plants. The instrument is robust, with relatively low capital cost and cost of ownership.

Original language	English
Pages (from-to)	3142-3148
Number of pages	7
Journal	Water Research
Volume	33
Issue number	14
DOIs	https://doi.org/10.1016/S0043-1354(99)00202-X
Publication status	Published - Oct 1999

Keywords

Automated instrument
Food industry effluents
Oxygen demand
Peroxide oxidation

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10.1016/S0043-1354(99)00202-X

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title = "An automated instrument for monitoring oxygen demand in polluted waters",

abstract = "An automated instrument is described which measures the oxygen demand of the organic content of a fluid based on oxidation by hydrogen peroxide with UV light. Residual hydrogen peroxide remaining after oxidation of the organic compounds is determined by gas liberated from H2O2 decomposition by catalase, measured by a low flow gas meter. Oxygen produced by the internal chain reaction of H2O2 with hydroxyl free radicals is also measured and since the amount of peroxide added is known, the amount of peroxide used to oxidize the organic compounds can be calculated. A linear relationship between organic strength (measured as COD or BOD) and the output of the instrument was obtained for dilutions of raw sewage (25-150 mg l-1 COD and undetectable to 54 mg l-1 BOD), a synthetic sewage (100-1400 mg l-1 COD and 68-952 mg l-1 BOD) and effluents from a creamery (50-600 mgl-1 COD) and potato processing factory (50-350 mg l-1 COD). The instrument is fully automated in the present version giving one sample measurement every 55 min and could be used on-line as the basis of a control strategy for wastewater treatment plants. The instrument is robust, with relatively low capital cost and cost of ownership.",

keywords = "Automated instrument, Food industry effluents, Oxygen demand, Peroxide oxidation",

author = "Guwy, {A. J.} and Farley, {L. A.} and P. Cunnah and Hawkes, {F. R.} and Hawkes, {D. L.} and M. Chase and H. Buckland",

note = "Funding Information: This work was funded by the Biotechnology and Biological Sciences Research Council of the UK under the Biological Treatment of Soil and Water LINK grant scheme (BSW05376). We acknowledge the help of Mr Per Bathman for operating and maintaining the oxygen demand monitor.",

year = "1999",

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doi = "10.1016/S0043-1354(99)00202-X",

language = "English",

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pages = "3142--3148",

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T1 - An automated instrument for monitoring oxygen demand in polluted waters

AU - Guwy, A. J.

AU - Farley, L. A.

AU - Cunnah, P.

AU - Hawkes, F. R.

AU - Hawkes, D. L.

AU - Chase, M.

AU - Buckland, H.

N1 - Funding Information: This work was funded by the Biotechnology and Biological Sciences Research Council of the UK under the Biological Treatment of Soil and Water LINK grant scheme (BSW05376). We acknowledge the help of Mr Per Bathman for operating and maintaining the oxygen demand monitor.

PY - 1999/10

Y1 - 1999/10

N2 - An automated instrument is described which measures the oxygen demand of the organic content of a fluid based on oxidation by hydrogen peroxide with UV light. Residual hydrogen peroxide remaining after oxidation of the organic compounds is determined by gas liberated from H2O2 decomposition by catalase, measured by a low flow gas meter. Oxygen produced by the internal chain reaction of H2O2 with hydroxyl free radicals is also measured and since the amount of peroxide added is known, the amount of peroxide used to oxidize the organic compounds can be calculated. A linear relationship between organic strength (measured as COD or BOD) and the output of the instrument was obtained for dilutions of raw sewage (25-150 mg l-1 COD and undetectable to 54 mg l-1 BOD), a synthetic sewage (100-1400 mg l-1 COD and 68-952 mg l-1 BOD) and effluents from a creamery (50-600 mgl-1 COD) and potato processing factory (50-350 mg l-1 COD). The instrument is fully automated in the present version giving one sample measurement every 55 min and could be used on-line as the basis of a control strategy for wastewater treatment plants. The instrument is robust, with relatively low capital cost and cost of ownership.

AB - An automated instrument is described which measures the oxygen demand of the organic content of a fluid based on oxidation by hydrogen peroxide with UV light. Residual hydrogen peroxide remaining after oxidation of the organic compounds is determined by gas liberated from H2O2 decomposition by catalase, measured by a low flow gas meter. Oxygen produced by the internal chain reaction of H2O2 with hydroxyl free radicals is also measured and since the amount of peroxide added is known, the amount of peroxide used to oxidize the organic compounds can be calculated. A linear relationship between organic strength (measured as COD or BOD) and the output of the instrument was obtained for dilutions of raw sewage (25-150 mg l-1 COD and undetectable to 54 mg l-1 BOD), a synthetic sewage (100-1400 mg l-1 COD and 68-952 mg l-1 BOD) and effluents from a creamery (50-600 mgl-1 COD) and potato processing factory (50-350 mg l-1 COD). The instrument is fully automated in the present version giving one sample measurement every 55 min and could be used on-line as the basis of a control strategy for wastewater treatment plants. The instrument is robust, with relatively low capital cost and cost of ownership.

KW - Automated instrument

KW - Food industry effluents

KW - Oxygen demand

KW - Peroxide oxidation

U2 - 10.1016/S0043-1354(99)00202-X

DO - 10.1016/S0043-1354(99)00202-X

M3 - Article

AN - SCOPUS:0032744839

VL - 33

SP - 3142

EP - 3148

JO - Water Research

JF - Water Research

SN - 0043-1354

IS - 14

ER -

An automated instrument for monitoring oxygen demand in polluted waters

Abstract

Keywords

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