Significance of COD, BOD and TOC correlations in kinetic models of biological oxidation

Aziz, Javed Anwar; Tebbutt, T.H.Y.

doi:10.1016/0043-1354(80)90077-9

Cited by 61 publications

(12 citation statements)

References 2 publications

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“…Given the shortcomings of BOD 5 and COD measurement there is growing movement to directly analyse Total Organic Carbon (TOC) compounds in wastewater (Aziz and Tebbutt, 1980;Thomas et al, 1999;Bisutti et al, 2004;Gray, 2010). The method utilised for the widest range of TOC analysis is High Temperature/Infrared (SM 5310 B), however for clean waters (ie MBR filtrate) the UV/persulfate method (SM 5310 C) has lower limits of detection (APHA, et al, 2005).…”

Section: Tocmentioning

confidence: 99%

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A review of practical tools for rapid monitoring of membrane bioreactors

2016

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The production of high quality effluent from membrane bioreactors (MBRs) arguably requires less supervision than conventional activated sludge (CAS) processes. Nevertheless, the use of membranes brings additional issues of activated sludge filterability, cake layer formation and membrane fouling. From a practical standpoint, process engineers and operators require simple tools which offer timely information about the biological health and filterability of the mixed liquor as well as risks of membrane fouling. To this end, a range of analytical tools and biological assays are critically reviewed from this perspective. This review recommends that Capillary Suction Time (CST) analysis along with Total Suspended and Volatile Solids (TSS/VSS) analysis is used daily. For broad characterisation, total carbon and nitrogen analysis offer significant advantages over the commonly used chemical and biological oxygen demand (COD/BOD) analyses. Of the technologies for determining the vitality of the microbial biomass the most robust and reproducible, are the second generation adenosine-5'-triphosphate (ATP) test kits. Extracellular polymer concentrations are best monitored by measurement of turbidity after centrifugation. Taken collectively these tools can be used routinely to ensure timely intervention and smoother operation of MBR systems.

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Section: Tocmentioning

confidence: 99%

“…BOD 5 limits frequently feature in regulatory requirements (Higgins et al, 2004). Conversion factors to determine one parameter from another (for example BOD from a COD measurement) should be used with extreme care and are not valid across different wastewater types (Aziz and Tebbutt, 1980).…”

Section: Sum Total Analysesmentioning

confidence: 99%

A review of practical tools for rapid monitoring of membrane bioreactors

2016

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“…By combining COD (mg/L) and DOC (mg/L) measurements in the concept of MOC, important information regarding the oxidative transformation or potential biodegradability of OM during biological WW treatment processes can be obtained. As the COD/ DOC ratio increases after biological treatment, the biologically refractory fraction of OM also increases (Aziz and Tebbutt, 1980), and the MOC should decrease accordingly. All samples were handled in precleaned amber glass bottles (1.2 M HCl overnight acid wash and then ashed for 2 hours at 5508C).…”

Section: Methodsmentioning

confidence: 99%

Comparison of Dissolved‐Organic‐Carbon Residuals from Air‐ and Pure‐Oxygen‐Activated‐Sludge Sequencing‐Batch Reactors

Esparza-Soto¹,

Fox²,

Westerhoff³

2006

Water Environment Research

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Literature shows that full‐scale pure‐oxygen activated sludge (O 2‐AS) wastewater treatment plants (WWTPs) generate effluents with higher dissolved‐organic carbon (DOC) concentrations and larger high‐molecular‐weight fractions compared to air‐activated‐sludge (Air‐AS) WWTP effluents. The purpose of this paper was to evaluate how gas supplied (air vs. pure oxygen) to sequencing‐batch reactors affected DOC transformations. The main conclusions of this paper are (a) O 2‐AS effluent DOC is more refractory than air‐AS effluent DOC; and (b) O 2‐AS systems may have higher five‐day biochemical oxygen demand removals than air‐AS systems; however, in terms of COD and DOC removal, air‐AS systems are better than O 2‐AS systems. Analysis of a database from side‐by‐side O 2‐ and air‐AS pilot tests from literature supported these observations.

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“…Además, de acuerdo con la literatura (Aziz y Tebbutt 1980), un valor para la relación DBO 5 /COT > 1.44, es un indicativo de que el efluente tiene alto contenido de compuestos orgánicos de carácter no biodegradable. Por lo tanto, un tratamiento biológico no sería suficiente para remover la materia orgánica de carácter recalcitrante presente en el presente vertido industrial.…”

Section: Degradación Del Etilenglicol Presente En Un Efluente Real Baunclassified

Mineralización De Etilenglicol Por Foto-Fenton Asistido Con Ferrioxalato

Arias

Arriola

Calle

et al. 2016

Rev. Int. Contam. Ambie.

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Palabras clave: agua residual de la industria de pinturas, ion ferroso, peróxido de hidrógeno, ion oxálico RESUMEN Se evaluó la efectividad del proceso foto-Fenton asistido con ferrioxalato para la mineralización de 1000 mg/L de etilenglicol presente en agua destilada y en agua residual proveniente de una planta de producción de pinturas. Se observó que la eficiencia de mineralización del etilenglicol es función de las concentraciones iniciales de ion ferroso, oxalato y peróxido de hidrógeno. Los mayores niveles de degradación del etilenglicol (90 y 85 %, para el agua destilada y el agua residual, respectivamente), se obtuvieron con 10 mg/L de Fe 2+ , 150 mg/L de C 2 O 4 2-y 500 mg/L de H 2 O 2 , después de 3 h de irradiación artificial con lámparas UV a una longitud de onda máxima de 365 nm. La descomposición del etilenglicol produjo cantidades traza (< 136 mg/L) de ácido acético y ácido fórmico, por lo que la disminución en la demanda química de oxígeno debida a este contaminante fue prácticamente total, ya que no se detectó ningún otro producto intermediario. El hierro no actuó directamente de manera catalítica en el sistema.Key words: wastewater from the paint industry, hydrogen peroxide, ferrous ion, oxalic ion ABSTRACTThe effectiveness of the ethylene glycol mineralization using ferrioxalate-induced photo-Fenton was evaluated. The efficiency of 1000 mg/L ethylene degradation was a function of the initial concentrations of ferrous ion, oxalate and hydrogen peroxide. The highest levels of degradation (90 and 85 % for distilled water and wastewater from the paint industry, respectively) were obtained using 10 mg/L of Fe 2+ , 150 mg/L of C 2 O 4 2-and 500 mg/L of H 2 O 2 after 3 hours of UV artificial irradiation (wavelength ~ 365 nm). Ethylene glycol was converted to acetic acid and formic acid in trace amounts (< 136 mg/L) resulting in a decrease of chemical oxygen demand due this contaminant. No other intermediate products were detected.

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Significance of COD, BOD and TOC correlations in kinetic models of biological oxidation

Cited by 61 publications

References 2 publications

A review of practical tools for rapid monitoring of membrane bioreactors

A review of practical tools for rapid monitoring of membrane bioreactors

Comparison of Dissolved‐Organic‐Carbon Residuals from Air‐ and Pure‐Oxygen‐Activated‐Sludge Sequencing‐Batch Reactors

Mineralización De Etilenglicol Por Foto-Fenton Asistido Con Ferrioxalato

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