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Study on evaluation and consideration issue on BOD removal in rural sewerage facilities with biofilm processes

The evaluation and consideration issue on BOD removal was studied by using observed data in rural sewerage facilities with biofilm processes. It was found that the probability distribution of influent BOD concentration in inflow pump tank and effluent BOD, ATU - BOD concentrations in sedimentation t... Full description

Journal Title: Transactions of the Japanese Society of Irrigation Drainage and Rural Engineering, 2008, Issue no.254, Issue 254, pp.97-104
Main Author: Nakano , T.
Format: Electronic Article Electronic Article
Language: jpn
Subjects:
Quelle: AGRIS (Food and Agriculture Organization of the United Nations)
ID: ISSN: 1882-2789
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recordid: faoagrisJP2008004151
title: Study on evaluation and consideration issue on BOD removal in rural sewerage facilities with biofilm processes
format: Article
creator:
  • Nakano , T.
subjects:
  • Sewerage
  • Rural Areas
  • Bioreactors
  • Pollutant Load
  • Measurement
  • Evacuation Des Eaux Usees
  • Zone Rurale
  • Bioreacteur
  • Charge Polluante
  • Mesure
  • Evacuacion De Aguas Residuales
  • Zonas Rurales
  • Biorreactores
  • Carga Contaminante
  • Medicion
ispartof: Transactions of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2008, Issue no.254, Issue 254, pp.97-104
description: The evaluation and consideration issue on BOD removal was studied by using observed data in rural sewerage facilities with biofilm processes. It was found that the probability distribution of influent BOD concentration in inflow pump tank and effluent BOD, ATU - BOD concentrations in sedimentation tank agreed with logarithmic normal distribution. The BOD removal was confirmed to be satisfied with treatment performance required. It was recognized that the distribution of effluent BOD concentrations in sedimentation tank has wider variation than the distribution of influent BOD concentration in inflow pump tank because of N - BOD concentration due to nitrification. The increase of effluent BOD concentrations in sedimentation tank was found to be resulted from the oxygen required for the conversion of ammonia to nitrate in effluent and dilution water. It was considered that the measured BOD value coud be achieved to meet the C - BOD value due to the suppression of nitrification reaction by changing the sampling point from sedimentation tank to disinfection tank or discharge tank. From an analytical standpoint of the evaluation method regarding to BOD removal, the improvement of existing BOD test such as change of standard dilution water method and sampling point is the effective measure to overcome the effect of nitrification in rural sewerage facilities with biofilm processes. ; Summaries (En, Ja) ; 5 tab. 9 fig. 21 ref.
language: jpn
source: AGRIS (Food and Agriculture Organization of the United Nations)
identifier: ISSN: 1882-2789
fulltext: fulltext
issn:
  • 18822789
  • 1882-2789
url: Link


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titleStudy on evaluation and consideration issue on BOD removal in rural sewerage facilities with biofilm processes
creatorNakano , T.
ispartofTransactions of the Japanese Society of Irrigation, Drainage and Rural Engineering, 2008, Issue no.254, Issue 254, pp.97-104
identifierISSN: 1882-2789
subjectSewerage ; Rural Areas ; Bioreactors ; Pollutant Load ; Measurement ; Evacuation Des Eaux Usees ; Zone Rurale ; Bioreacteur ; Charge Polluante ; Mesure ; Evacuacion De Aguas Residuales ; Zonas Rurales ; Biorreactores ; Carga Contaminante ; Medicion
descriptionThe evaluation and consideration issue on BOD removal was studied by using observed data in rural sewerage facilities with biofilm processes. It was found that the probability distribution of influent BOD concentration in inflow pump tank and effluent BOD, ATU - BOD concentrations in sedimentation tank agreed with logarithmic normal distribution. The BOD removal was confirmed to be satisfied with treatment performance required. It was recognized that the distribution of effluent BOD concentrations in sedimentation tank has wider variation than the distribution of influent BOD concentration in inflow pump tank because of N - BOD concentration due to nitrification. The increase of effluent BOD concentrations in sedimentation tank was found to be resulted from the oxygen required for the conversion of ammonia to nitrate in effluent and dilution water. It was considered that the measured BOD value coud be achieved to meet the C - BOD value due to the suppression of nitrification reaction by changing the sampling point from sedimentation tank to disinfection tank or discharge tank. From an analytical standpoint of the evaluation method regarding to BOD removal, the improvement of existing BOD test such as change of standard dilution water method and sampling point is the effective measure to overcome the effect of nitrification in rural sewerage facilities with biofilm processes. ; Summaries (En, Ja) ; 5 tab. 9 fig. 21 ref.
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descriptionThe evaluation and consideration issue on BOD removal was studied by using observed data in rural sewerage facilities with biofilm processes. It was found that the probability distribution of influent BOD concentration in inflow pump tank and effluent BOD, ATU - BOD concentrations in sedimentation tank agreed with logarithmic normal distribution. The BOD removal was confirmed to be satisfied with treatment performance required. It was recognized that the distribution of effluent BOD concentrations in sedimentation tank has wider variation than the distribution of influent BOD concentration in inflow pump tank because of N - BOD concentration due to nitrification. The increase of effluent BOD concentrations in sedimentation tank was found to be resulted from the oxygen required for the conversion of ammonia to nitrate in effluent and dilution water. It was considered that the measured BOD value coud be achieved to meet the C - BOD value due to the suppression of nitrification reaction by changing the sampling point from sedimentation tank to disinfection tank or discharge tank. From an analytical standpoint of the evaluation method regarding to BOD removal, the improvement of existing BOD test such as change of standard dilution water method and sampling point is the effective measure to overcome the effect of nitrification in rural sewerage facilities with biofilm processes. ; Summaries (En, Ja) ; 5 tab. 9 fig. 21 ref.
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abstractThe evaluation and consideration issue on BOD removal was studied by using observed data in rural sewerage facilities with biofilm processes. It was found that the probability distribution of influent BOD concentration in inflow pump tank and effluent BOD, ATU - BOD concentrations in sedimentation tank agreed with logarithmic normal distribution. The BOD removal was confirmed to be satisfied with treatment performance required. It was recognized that the distribution of effluent BOD concentrations in sedimentation tank has wider variation than the distribution of influent BOD concentration in inflow pump tank because of N - BOD concentration due to nitrification. The increase of effluent BOD concentrations in sedimentation tank was found to be resulted from the oxygen required for the conversion of ammonia to nitrate in effluent and dilution water. It was considered that the measured BOD value coud be achieved to meet the C - BOD value due to the suppression of nitrification reaction by changing the sampling point from sedimentation tank to disinfection tank or discharge tank. From an analytical standpoint of the evaluation method regarding to BOD removal, the improvement of existing BOD test such as change of standard dilution water method and sampling point is the effective measure to overcome the effect of nitrification in rural sewerage facilities with biofilm processes.
date2008-04