Oxygen sag equation for second-order BOD decay

Adrian, Donald Dean; Sanders, Thomas G.

doi:10.1016/s0043-1354(97)00259-5

Cited by 34 publications

(29 citation statements)

References 5 publications

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“…Segundo Adrian & Sanders (1998), uma das vantagens da utilização do modelo da cinética de segunda ordem é a obtenção de maio- …”

Section: Introductionunclassified

“…Para verificar se o modelo de segunda ordem descreve melhor a progressão de DBO do que a equação de primeira ordem, tal como afirmado por Adrian & Sanders (1998), o modelo da Equação 2 foi ajustado aos dados obtidos experimentalmente, estando os valores apresentados na Tabela 3.…”

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“…Tal como reportado por Adrian & Sanders (1998), a ( , obtidos no ajuste da equação de primeira ordem, foi de 12,45%. Quando eles foram obtidos a partir do ajuste da equação de segunda ordem, a diferença foi de 12,77%.…”

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Modelagem da progressão da DBO obtida na incubação de esgoto doméstico sob diferentes temperaturas

Matos

Borges

Matos³

et al. 2017

Eng. Sanit. Ambient.

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Eng Sanit Ambient | v.22 n.5 | set/out 2017 | 821-828 RESUMOConfiável quantificação da demanda bioquímica de oxigênio exercida (DBO exercida) poderá ser obtida com incubação das amostras sob temperaturas diferentes, desde que o valor da demanda bioquímica de oxigênio última (DBO U ) não seja alterado nessas condições. Alguns autores têm relatado aumento no valor da DBO U com a elevação da temperatura de incubação das amostras, o que pode ser decorrente da ocorrência da nitrificação, da aclimatação diferenciada ou do mau ajuste dos modelos de progressão da demanda bioquímica carbonácea de oxigênio (DBO exercida). Neste estudo, objetivou-se avaliar o efeito da temperatura sobre a progressão da DBO exercida e o valor da DBO u em amostras de esgoto doméstico bruto, avaliando-se qual modelo melhor se ajusta aos dados obtidos. Os resultados indicaram pequena influência da temperatura de incubação das amostras nos valores da DBO U do esgoto sanitário e que os modelos de primeira e segunda ordens descreveram adequadamente a progressão da DBO exercida.Palavras-chave: demanda bioquímica de oxigênio última; matéria orgânica carbonácea; modelos de progressão da DBO. being that both models, first and second order, described properly the exerted BOD progression.Keywords: carbonaceous organic matter; progression models of BOD; ultimate biochemical oxygen demand.

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“…Segundo Adrian & Sanders (1998), uma das vantagens da utilização do modelo da cinética de segunda ordem é a obtenção de maio- …”

Section: Introductionunclassified

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Modelagem da progressão da DBO obtida na incubação de esgoto doméstico sob diferentes temperaturas

Matos

Borges

Matos³

et al. 2017

Eng. Sanit. Ambient.

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“…(Metcaft & Eddy Inc., 1974;Andrian & Sanders, 1998;Green & Ward, 2011;Clesceri et al, 1998;Borkar & Mahatime, 2011, Vymazal, 2010, Umidla & Ademoroti, 2012Uwidia & Ukulu, 2013;Tchnobanoglous & Kreiti, 2002;Padgett, 1978;Padgett, 1975;Sah et al, 2011;Srivastav & Avasthi, 1975;Mispagel & Gray, 2005). It is expected to decrease the maximum concentration of BOD, COD, TDS, TSS, and turbidity from shrimp farms around the country.…”

Section: Introductionmentioning

confidence: 99%

ACM Check Dams in Concrete Gutters for Recirculation Filters of Wastewater from Whiteleg Shrimp (Litopenaeus vannamei) Aquaculture in Southern Thailand

Peerakeitkhajorn¹,

Tarnchalanukit²,

Chunkao³

2015

MAS

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The research was aimed to recirculate the treated wastewater from Whiteleg shrimp farms in following each other without interruption by using concrete gutters containing ACM (Assembled Constructed Materials) check dams as the filters. Among the 2-inch diameter of chipped-assembled-constructed materials, the ACM-Brick filter was the most effective rather than roof-tile, blocked cement, and rock, respectively. Three ACM-Brick check dams with 5-m space between them were indicated as 47.3% treatment efficiency together with flow rates of 600 to 900 L/hr, and up to more 65% and 85% for fourth and fifth ACM-Brick check dams while the first and second dams found 13.0% to 28.4% efficiencies. Seemingly, irrespective of employing brick, roof-tile, blocked cement, or rock for constructing the ACM check dam was installed in concrete gutters with the size of 1-m width, 0.5-m depth, and more or less 20-m length that could be served needs in recirculation aquaculture of Whiteleg shrimps to gain satisfied benefits. Culturing Whiteleg shrimps in 3-sq.m. and 3-cu.m.concrete gutters containing only one of 0.5-sq.m. and 1-depth ACM-Brick filters by RCB design for 4 treatments (culturing shrimp densities) and 3 replications found the density of 105 juveniles/3m 2 (6,606 kg/ha) with the most harvested-added weight 2,710 kg/ha (69.55 % of beginning weight), and decreasing after increasing the density of 6,720, 8,371, and 11,382 kg/ha in corresponding to harvested-added weight 65.29%, 46.36%, and 42.33%, respectively. The findings also informed that flow rate of 720 L/hr indicated somewhat high effective influences on decreasing of water temperature, salinity, pH, DO, EC, alkalinity, TDS, BOD, NH 4 -N, NO 2 -N, and NO 3 -N which were conditioned for recirculation aquaculture of Whiteleg shrimps.

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“…In addition, during the past decades, many scientists around the world have carried out researches to study the influences of OCOs on dissolved oxygen (DO) and relationships between DO and BOD as well as between BOD and COD in waste and natural waters (Adrian and Sanders, 1998;Leu et al, 1998;Baker et al, 1999). Some researchers have studied methods for determination of COD in natural waters Udovichenko et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Influence of Humic Substance in Solids on the Measurement of Oxygen-Consuming Organics of the Yellow River

Xia¹

2005

J ENV INFORM

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ABSTRACT. The Yellow River has a high content of solids. The influence of solids on the measurement of oxygen-consuming organics (OCOs) such as chemical oxygen demand (COD Mn ) has aroused attentions in recent years. However, no research about effects of humic substance in solids on the determination of COD Mn has been reported. Experiments have been carried out to study the influence of humic substance in solids (Loess soil) on COD Mn in this research. Several significant results have arisen from the study. (1) The total COD Mn of water sample including liquid and solid phases increased significantly with the increase of solid content; the COD Mn of liquid phase of water sample under pre-treatment with acid (LPUPA) also increased significantly with the increase of solid content while that without pre-treatment did not increased significantly. (2) With the increasing of solid content, the total BOD 5 of water sample increased much slower than the total COD Mn and the COD Mn of LPUPA. (3) The humic substances in solids contributed greatly to the total COD Mn of water sample. When the solid contents were 7.5 and 15.0 g/L, the humic substances in solids accounted for 15.9% and 17.1% of the total COD Mn of water sample, respectively; fulvic acid-one of the main compositions of humic substance-contributed to 23.6% and 46.3% of the COD Mn of LPUPA, respectively. (4) The humic substances can hardly be biologically oxidized under natural conditions, the COD Mn of LPUPA and the total COD Mn of water sample exaggerates the oxygen-consuming organic contamination of the Yellow River. Therefore, COD Mn was not suitable for being regarded as a parameter reflecting the pollution degree of OCOs in river water with a high solid content.

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Oxygen sag equation for second-order BOD decay

Cited by 34 publications

References 5 publications

Modelagem da progressão da DBO obtida na incubação de esgoto doméstico sob diferentes temperaturas

Modelagem da progressão da DBO obtida na incubação de esgoto doméstico sob diferentes temperaturas

ACM Check Dams in Concrete Gutters for Recirculation Filters of Wastewater from Whiteleg Shrimp (Litopenaeus vannamei) Aquaculture in Southern Thailand

Influence of Humic Substance in Solids on the Measurement of Oxygen-Consuming Organics of the Yellow River

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