Chemical Oxygen Demand Pdf

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Biochemical Oxygen Demand And Chemical Oxygen Demand

Chemical Oxygen Demand merupakan parameter kualitas air yang penting karena, mirip dengan BOD, ia dapat menilai dampak effluen air limbah yang akan dibuang pada ling kungan penerima (badan air). Tingkat COD tinggi menandakan banyaknya jumlah bahan organik yang teroksidasi pada sampel, yang akan mengurangi tingkat oksigen terlarut (DO). Chemical oxygen demand test uses a strong chemical oxidant in an acid solution and heat to oxidize organic carbon to CO2 and H2O. It can be expressed in milligrams per liter (mg/L) also referred to part per million (ppm) which indicates the mass of oxygen consumed per liter solution. The Chemistry of Chemical Oxygen Demand. By John Stone. Chemical Oxygen Demand (COD) is a quick, inexpensive means to determine organics in water. COD samples are prepared with a closed-reflux digestion followed by analysis. 5220 CHEMICAL OXYGEN DEMAND (COD).#(102) 5220 A. Introduction Chemical oxygen demand (COD) is defined as the amount of a specified oxidant that reacts with the sample under controlled conditions. The quantity of oxidant consumed is expressed in terms of its oxygen equivalence. Because of its unique chemical properties, the dichromate ion.

OXYGEN DEMAND

  • required for oxidation of inorganic and organic matter.
  • essential for the livelihood of micro organisms.
  • can be measured by
    • BOD – Biochemical oxygen demand
    • COD – Chemical oxygen demand

      Biochemical Oxygen Demand And Chemical Oxygen Demand

Biochemical Oxygen Demand

Introduction

  • measures the quantity of oxygen consumed by microorganisms during the decomposition of organic matter.
  • indirect measure of biodegradable organic compounds in water.

Significance

  • determining degree of H2O pollution.
  • Important measurement in operation of sewage treatment plant.
  • Comparing BOD of incoming sewage & effluent- efficiency, effectiveness of treatment is judged.
  • For example, in a typical residential city raw sewage has a BOD value of around 300 mg/L. If the effluent from the sewage treatment plant has a BOD. of about 30 mg/L, the plant has removed 90 percent of the BOD

Chemical Oxygen Demand Testing

Definition

Chemical Oxygen Demand Lab Report

Dilution Method

  • DO Is measured prior to incubation.
  • allowed to stand for five days at a controlled temperature of 20 °C (68 °F).
  • At the end of the five-day period, the remaining dissolved oxygen is measured.
Chemical oxygen demand pdf
  • BODt = (DOi – DOf) × D.F.

Where,

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  • BODt = Biochemical oxygen demand at t days.
  • DOi = initial dissolved oxygen before incubation.
  • DOf = final dissolved oxygen.
  • D.F.= dilution factor= volume of the bottle/volume of the sample.

Kinetics

Limitations

  • Dilution is required.
  • Pretreatment if toxic wastes.
  • Long period of time.
  • Seeding for industrial water.

Chemical Oxygen Demand

Introduction

  • Measure of oxygen equivalent of the organic matter content of the sample that is susceptible to oxidation by a strong chemical oxidant (acid + heat).
  • COD test results are used for monitoring and control of discharges, and for assessing treatment plant performance.
  • Expressed in mg/l or ppm.

COD TEST

  • Potassium dichromate, a strong oxidizing agent is used under acidic conditions to find the amount of organic compound in waste water sample.
  • Acidity is usually achieved by the addition of sulphuric acid.
  • The amount of Cr3+ is determined after oxidization is complete, and is used as an indirect measure of the organic contents of the water sample.
  • To do so, the excess potassium dichromate is titrated with ferrous ammonium sulphate (FAS) until all of the excess oxidizing agent has been reduced to Cr3+.

Accuracy Of The Test

  • It is important that no outside organic material be accidentally added to the sample to be measured.
  • To control for this, blank sample is used created by adding all reagents (e.g. acid and oxidizing agent) to a volume of distilled water. COD is measured for both and the two are compared i.e. COD of blank – COD of sample.

Limitations

Chemical Oxygen Demand Test

  • Chemical Oxidant is not specific to oxygen-consuming chemicals that are organic or inorganic, both of these sources of oxygen demand are measured in a COD assay.
  • It does not distinguish between Biodegradable and Non-Biodegradable organic matter.
  • The test does not measure the oxygen demand caused. by the oxidation of ammonia into nitrate

COD vs BOD

  • Faster process control.
  • COD and BOD do not necessarily measure the same types of oxygen consumption.
  • COD is always greater than BOD measurements.
  • COD is a more stable measurement method.
  • How can a correlation be determined?
  • Collect empirical data
  • COD and BOD data for the same water sample collected over the same period of time.
  • Graph data
  • Graph COD and BOD data to determine whether or not a correlation exists.

Related Articles

  1. Laitinen, G.A. and Harris, W.E., Chemical Analysis, New York; McGraw-Hill, 1975, 2nd ed.Google Scholar
  2. Leithe, W., Die Analyse der organischen Verunreinigungen in Trink-, Brauch-, und Abwassern, Stuttgart: Wissenschaftliche, 1972.Google Scholar
  3. Lur’e, Yu.Yu., Analiticheskaya khimiya promyshlennykh stochnykh vod (Analytical Chemistry of Industrial Wastewater), Moscow: Khimiya, 1984.Google Scholar
  4. Posylaiko, V.I., Kozyreva, N.A., and Logacheva, Yu.P., Khimicheskie metody analiza (Chemical Methods of Analysis), Moscow: Vysshaya Shkola, 1989.Google Scholar
  5. Golovatyi, E.I., Instrumental’nye metody kontrolya BPK stochnykh vod mikrobiologicheskoi promyshlennosti: Obzornaya informatsiya (Instrumental Methods for Monitoring BOD of Wastewater from Microbiological Industries: Review), Moscow: ONTITEI Mikrobioprom, 1982.Google Scholar
  6. SO 6060-86: Quality of Water: Determination of Chemical Oxygen Demand.Google Scholar
  7. RF Patent 1 223 123.Google Scholar
  8. Dugin, G.V., Pisarevsky, A.M., and Polozova, I.P., Khim. Tekhnol. Vody, 1985, vol. 5, no.4, pp. 51–53.Google Scholar
  9. Dugin, G.V., Pisarevsky, A.M., Polozova, I.P., and Shul’ts, M.M., Zh. Prikl. Khim., 1986, vol. 59, no.1, pp. 22–27.Google Scholar
  10. Beliustin, A.A., Pisarevsky, A.M., Lepnev, G.P., et al., Sensors Actuators B, 1992, vol. 10, pp. 61–66.Google Scholar
  11. Kolichestvennyi khimicheskii analiz vod: Metodika vypolneniya izmerenii massovoi kontsentratsii khimicheski potreblyaemogo kisloroda v probakh prirodnykh i stochnykh vod bikhromatopotentsiometricheskim metodom. Minprirody Rossii (Quantitative Chemical Analysis of Water: Procedure for Determining Chemical Oxygen Demand (Mass Concentration) in Samples of Natural and Waste Water by Bichromatopotentiometric Method, Ministry of Environment of the Russian Federation), PND F 14.1:2.19-95, Moscow, 1995.Google Scholar
  12. Antsyshkina, N.D., Dugin, G.V., Pisarevsky, A.M., et al., Abstracts of Papers, Third International Congr. “Water: Ecology and Technology,” Moscow. 1998, pp. 341–342.Google Scholar
  13. JPN Appl. 09 311 130 A2.Google Scholar
  14. JPN Appl. 06 341 981 A2.Google Scholar
  15. Korenaga, T., Zhon, X., Okada, K., et al., Anal. Chim. Acta, 1993, vol. 272, no.2, pp. 237–244.Google Scholar
  16. Simal, J., Lage, M.A., and Iglesias, I., An. Bromatol., 1986, vol. 37, no.1, pp. 125–142.Google Scholar
  17. Zhang, S., Li, W., and Wang, H., Huagong Huanbao (China), 2001, vol. 21, no.3, pp. 171–173.Google Scholar
  18. Miller, D.G., Brayton, S.V., and Boyles, W.T., Water Environ. Res., 2001, vol. 73, no.1, pp. 63–71.PubMedGoogle Scholar
  19. Vaidya, B., Watson, S.W., Coldiron, S.J., et al., Anal. Chim. Acta, 1997, vol. 357, no.12, pp. 167–175.Google Scholar
  20. Lee, K.-H., Ishikawa, T., McNiven, S.J., et al., Anal. Chim. Acta, 1999, vol. 398, nos.2–3, pp. 161–171.Google Scholar
  21. Abdullin, I.F., Dement’enko, A.A., Budnikov, G.K., et al., Zavod. Lab., Diagnost. Mater., 2001, vol. 67, no.1, pp. 15–17.Google Scholar
  22. Chinese Patent 1 128 352 A.Google Scholar
  23. Chen, S.-Ch., Tzeng, J.-H., et al., Anal. Sci. (Taiwan), 2001, vol. 17, no.4, pp. 551–553.PubMedGoogle Scholar
  24. Rustioni, M., Cassani, G., Faccetti, E., Nucci, G., et al., in 4th World Surfactants Congr., Barcelona, 1996, vol. 1, pp. 474–488.Google Scholar
  25. Jardin, W.F. and Rohwedder, J.J., Water Res., 1989, vol. 23, no.8, pp. 1069–1071.Google Scholar
  26. Beltra, A.P., Iniesta, J., Gras, L., et al., Instr. Sci. Technol., 2003, vol. 31, no.3, pp. 249–259.Google Scholar
  27. Chen, H., An, T.-C., Fang, Y.-J., et al., Yankuany Ceshi (China), 1999, vol. 18, no.3, pp. 185–188.Google Scholar
  28. Vallejo-Pecharroman, B., Izquierdo-Reina, A., and Castro, L. de, Analyst, 1999, vol. 124, no.8., pp. 1261–1264.Google Scholar
  29. Schmitz, A., Eberhardt, R., Spohn, U., et al., DECHEMA Biotechnol. Conf., 1992, vol. 5, part B, pp. 1117–1120.Google Scholar
  30. FRG Patent 3 707 815 A1.Google Scholar
  31. Lee, K.-H., Ishikawa, T., Sasaki, S., et al., Electroanalysis, 1999, vol. 11, no.16, pp. 1172–1179.Google Scholar
  32. Vorontsov, A.M., Nikanorova, M.N., and Melent’ev, K.V., Abstracts of Papers, Vserossiiskaya konferentsiya “Sensor-2000” (Russian Conf. “Sensor-2000”), St. Petersburg, June 21–23, 2000, p. 21.Google Scholar
  33. Vorontsov, A.M., Nikanorova, M.N., and Melent’ev, K.V., Vodnye ob’ekty Sankt-Peterburga (Water Bodies of St. Petersburg), Kondrat’ev, S.A. and Frumin, G.T., Eds., St. Petersburg, 2002, pp. 73–78.Google Scholar
  34. Orhon, D. and Cokgor, E.U., J. Chem. Technol. Biotechnol., 1997, vol. 68, no.3, pp. 283–293.Google Scholar
  35. Vestner, R.I. and Gunthert, F.W., GWF, Wasser, Abwasser, 2001, vol. 142, no.9, pp. 635–644.Google Scholar
  36. Sperandio, M., Urbain, V., Ginestet, P., et al., Water Sci. Technol., 2001, vol. 43, part 1, pp. 181–190.Google Scholar
  37. Gorgun, E., Cokgor, E.U., Ohron, D., et al., Water Sci. Technol., 1995, vol. 32, no.12, pp. 43–52.Google Scholar
  38. Kato, Y., Kumagai, T., Nishioka, H., et al., Oriental J. Chem., 2001, vol. 17, no.1, pp. 1–8.Google Scholar
  39. Unmarino, G. and Russo, A., Mater. Conc. (Italy), 1996, vol. 72, no.1, pp. 51–52.Google Scholar
  40. Aisaka, K. and Mikashima, H., Examination of COD Testing Methods for Waters from Industrial Final Disposal Sites, Kenkyusho Nenpo (Japan), 1994, pp. 177–178.Google Scholar
  41. Bristol, P., Civiello, J., Harp, D., et al., Water Environment Federation Annual Conf., Atlanta, 2001, vol. 74, pp. 5436–5449.Google Scholar
  42. Belen’kaya, S.L., Popova, Yu.I., and Kalitvyanskaya, V.I., Ferment. Spirt. Prom-st., 1987, no. 4, pp. 13–14.Google Scholar
  43. Amarasinghe, H., Anusha, U., Gunavardena, H.D., et al., J. Nat. Sci. Council Sri Lanka, 1993, vol. 21, no.2, pp. 259–266.Google Scholar