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Study on characteristics of COD removal in aerobic filter tank of rural sewerage facilities with submerged biological filters

COD removal performance in aerobic filter tank was investigated using observed data on rural sewerage facilities with submerged biological filters. It was found that the probability distribution of influent COD in aerobic filter tank and effluent COD in sedimentation tank agreed with the normal dist... Full description

Journal Title: Transactions of the Japanese Society of Irrigation Drainage and Reclamation Engineering, 2002, Issue no.218, Issue 218, pp.63-72
Main Author: Nakano , T.
Other Authors: Itoi , K. , Kitao , T.
Format: Electronic Article Electronic Article
Language: jpn
Subjects:
Cod
Quelle: AGRIS (Food and Agriculture Organization of the United Nations)
ID: ISSN: 0387-2335
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recordid: faoagrisJP2002004836
title: Study on characteristics of COD removal in aerobic filter tank of rural sewerage facilities with submerged biological filters
format: Article
creator:
  • Nakano , T.
  • Itoi , K.
  • Kitao , T.
subjects:
  • Rural Areas
  • Wastewater Treatment
  • Equipment Performance
  • Aeration
  • Filters
  • Sewerage
  • Cod
ispartof: Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering, 2002, Issue no.218, Issue 218, pp.63-72
description: COD removal performance in aerobic filter tank was investigated using observed data on rural sewerage facilities with submerged biological filters. It was found that the probability distribution of influent COD in aerobic filter tank and effluent COD in sedimentation tank agreed with the normal distribution and logarithmic normal distribution. It was found that COD removal in aerobic filter tank was influenced by capability to catch suspended solids and deatchment - and - elution of accumulated matter in filters of aerobic filter tank. It was assumed that an aerobic filter tank was represented as completely mixed reactor and COD reduction was employed with a linear function. The specific surface area of contact filter in aerobic filter tank have influence on COD removal in aerobic filter tank. It is suggested that ORP and DO in aerobic filter tank may be affected significantly by aeration rate so that COD removal shall be governed from aeration rate in aerobic filter tank. COD removal rate was assumed to depend on influent COD concentration, hydraulic loading, specific surface area of packing media, and aeration rate in aerobic filter tank. The multiple regression equation between COD removal rate and these four factors can be derived from observed data. The control of sludge accumulation and substrate removal rate in aerated filter tank is effective in maintaining stable COD removal efficiency. ; Summaries (En, Ja) ; 3 tables; 20 fig.; 10 ref.
language: jpn
source: AGRIS (Food and Agriculture Organization of the United Nations)
identifier: ISSN: 0387-2335
fulltext: fulltext
issn:
  • 03872335
  • 0387-2335
url: Link


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titleStudy on characteristics of COD removal in aerobic filter tank of rural sewerage facilities with submerged biological filters
creatorNakano , T. ; Itoi , K. ; Kitao , T.
ispartofTransactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering, 2002, Issue no.218, Issue 218, pp.63-72
identifierISSN: 0387-2335
subjectRural Areas ; Wastewater Treatment ; Equipment Performance ; Aeration ; Filters ; Sewerage ; Cod
descriptionCOD removal performance in aerobic filter tank was investigated using observed data on rural sewerage facilities with submerged biological filters. It was found that the probability distribution of influent COD in aerobic filter tank and effluent COD in sedimentation tank agreed with the normal distribution and logarithmic normal distribution. It was found that COD removal in aerobic filter tank was influenced by capability to catch suspended solids and deatchment - and - elution of accumulated matter in filters of aerobic filter tank. It was assumed that an aerobic filter tank was represented as completely mixed reactor and COD reduction was employed with a linear function. The specific surface area of contact filter in aerobic filter tank have influence on COD removal in aerobic filter tank. It is suggested that ORP and DO in aerobic filter tank may be affected significantly by aeration rate so that COD removal shall be governed from aeration rate in aerobic filter tank. COD removal rate was assumed to depend on influent COD concentration, hydraulic loading, specific surface area of packing media, and aeration rate in aerobic filter tank. The multiple regression equation between COD removal rate and these four factors can be derived from observed data. The control of sludge accumulation and substrate removal rate in aerated filter tank is effective in maintaining stable COD removal efficiency. ; Summaries (En, Ja) ; 3 tables; 20 fig.; 10 ref.
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titleStudy on characteristics of COD removal in aerobic filter tank of rural sewerage facilities with submerged biological filters
descriptionCOD removal performance in aerobic filter tank was investigated using observed data on rural sewerage facilities with submerged biological filters. It was found that the probability distribution of influent COD in aerobic filter tank and effluent COD in sedimentation tank agreed with the normal distribution and logarithmic normal distribution. It was found that COD removal in aerobic filter tank was influenced by capability to catch suspended solids and deatchment - and - elution of accumulated matter in filters of aerobic filter tank. It was assumed that an aerobic filter tank was represented as completely mixed reactor and COD reduction was employed with a linear function. The specific surface area of contact filter in aerobic filter tank have influence on COD removal in aerobic filter tank. It is suggested that ORP and DO in aerobic filter tank may be affected significantly by aeration rate so that COD removal shall be governed from aeration rate in aerobic filter tank. COD removal rate was assumed to depend on influent COD concentration, hydraulic loading, specific surface area of packing media, and aeration rate in aerobic filter tank. The multiple regression equation between COD removal rate and these four factors can be derived from observed data. The control of sludge accumulation and substrate removal rate in aerated filter tank is effective in maintaining stable COD removal efficiency. ; Summaries (En, Ja) ; 3 tables; 20 fig.; 10 ref.
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abstractCOD removal performance in aerobic filter tank was investigated using observed data on rural sewerage facilities with submerged biological filters. It was found that the probability distribution of influent COD in aerobic filter tank and effluent COD in sedimentation tank agreed with the normal distribution and logarithmic normal distribution. It was found that COD removal in aerobic filter tank was influenced by capability to catch suspended solids and deatchment - and - elution of accumulated matter in filters of aerobic filter tank. It was assumed that an aerobic filter tank was represented as completely mixed reactor and COD reduction was employed with a linear function. The specific surface area of contact filter in aerobic filter tank have influence on COD removal in aerobic filter tank. It is suggested that ORP and DO in aerobic filter tank may be affected significantly by aeration rate so that COD removal shall be governed from aeration rate in aerobic filter tank. COD removal rate was assumed to depend on influent COD concentration, hydraulic loading, specific surface area of packing media, and aeration rate in aerobic filter tank. The multiple regression equation between COD removal rate and these four factors can be derived from observed data. The control of sludge accumulation and substrate removal rate in aerated filter tank is effective in maintaining stable COD removal efficiency.
date2002-04