Estimation of Biochemical Oxygen Demand Based on Dissolved Organic Carbon, UV Absorption, and Fluorescence Measurements

Kwak, Juhyoun; Khang, Bumju; Kim, Eun‐Hee; Kim, Hyunook

doi:10.1155/2013/243769

Cited by 28 publications

(17 citation statements)

References 19 publications

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“…Given the large amount of data provided by QIA the use of a number of different multivariate statistical techniques, such as cross correlation (CC), partial least squares (PLS), and principal components analysis (PCA) render indispensable to organize the data and extract relevant information. In fact such techniques have already been found useful to correlate operational conditions to sludge characteristics and predict biochemical oxygen demand (BOD 5 ) and removal of trace organic compounds in WWTP [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Sludge volume index and suspended solids estimation of mature aerobic granular sludge by quantitative image analysis and chemometric tools

Leal

Río

Mesquita

et al. 2020

Separation and Purification Technology

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Aerobic granular sludge (AGS) is considered a promising technology for wastewater treatment. Furthermore, it is recognized that the stability of the process is related to the balanced growth of the suspended (floccular) and granular fractions. Therefore, the development of adequate techniques to monitor this balance is of interest. In this work the sludge volume index (SVI), volatile suspended solids (VSS) and total suspended solids (TSS) of mature AGS were successfully predicted with multilinear regression (MLR) models using data obtained from quantitative image analysis (QIA) of both fractions (suspended and granular). Relevant predictions were obtained for the SVI (R 2 of 0.975), granules TSS (R 2 of 0.985), flocs TSS (R 2 of 0.971), granules VSS (R 2 of 0.984) and flocs VSS (R 2 of 0.986). The estimation of the granular fraction ratio from the predicted TSS and VSS was also successful (R 2 of 0.985). The predictions help to avoid instability episodes of the AGS system, such as changes in biomass morphology, structure and settling properties.

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Section: Introductionmentioning

confidence: 99%

Sludge volume index and suspended solids estimation of mature aerobic granular sludge by quantitative image analysis and chemometric tools

Leal

Río

Mesquita

et al. 2020

Separation and Purification Technology

View full text Add to dashboard Cite

show abstract

“…The end of the impact zone is defined as the point at which BOD reaches background environmental levels (< 1 -8 mg L -1 ) (Schwarzenbach et al, 2003). Therefore, the experimental DOC was measured and used in the mathematical model (2) derived from the linear correlation of DOC and BOD (R 2 =0.86) obtained from a large set of experimental data for untreated wastewater (Kwak et al, 2013). Through this correlation it was possible to estimate the temporal end boundary of the impact zone.…”

Section: Apis Persistence Through the Impact Zonementioning

confidence: 99%

“…However, reliable datasets are available that provide a strong correlation between measured DOC and BOD for untreated municipal wastewater (Comber et al, 2018;Kwak et al, 2013).…”

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confidence: 99%

Impact of the wastewater-mixing zone on attenuation of pharmaceuticals in natural waters: Implications for an impact zone inclusive environmental risk assessment

Bagnis

Fitzsimons

Snape

et al. 2019

Science of The Total Environment

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The direct discharge of untreated wastewater has been identified as an important source of environmental contamination by active pharmaceutical ingredients and other 'down-thedrain' chemicals in developing countries. It necessitates the development of an environmental risk assessment approach for the resulting impact zone. This study was designed to investigate the impact of low level of dilution (<10) on the natural attenuation processes of distribution and degradation within the impact zone. Dilution of the untreated wastewater resulted in increased desorption and corresponding environmental concentrations. The presence/absence of the microbial population in the batches affected the degree of sorption depending on the compound charge (i.e. positive or negative), highlighting an experimental technical bias. The degradation half-lives of acebutolol and diclofenac increased with increasing dilution and resulted in higher environmental persistence. The modelling of the biochemical oxygen demand (BOD) allowed an estimate of the temporal end boundary of the impact zone to be predicted as 24 h. Therefore, it was concluded that most of the investigated compounds would persist beyond the end of the impact zone as defined by the return to environmental BOD concentrations. It is proposed that, within environmental risk assessment protocols, the impact zone should be considered as a semi-natural wastewater treatment area in such a way to allow the estimate of environmental concentrations of pharmaceuticals beyond its end.

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“…Bulk parameters such as total organic carbon (TOC), dissolved organic carbon (DOC) or UVabsorbance at 254 nm are commonly used in industry to monitor DOM along the process. These analytical techniques are easy to use, fast and economically affordable [20][21]. However, they do not provide information about the composition of DOM.…”

Section: -Introductionmentioning

confidence: 99%

Monitoring UF membrane performance treating surface-groundwater blends: Limitations of FEEM-PARAFAC on the assessment of the organic matter role

Vera

Martín-Alonso²,

Mesa³

et al. 2017

Chemical Engineering Journal

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The decrease of water quantity and quality in water scarcity areas is palliated by improving water treatments with membrane technologies. System performance and efficiency, and then cost, is mainly affected by membrane fouling, which is still not well understood and controlled appropriately. In this study, the influence of content and composition of dissolved organic matter (DOM) on a membrane ultrafiltration (UF) stage from a full-scale UF stage in a drinking water treatment plant (DWTP) fed with surface water, groundwater (or blends of them) was investigated. Excitation-emission matrix (EEM) fluorescence spectroscopy coupled with parallel factor analysis (PARAFAC) was used to characterize and assess DOM changes in water samples Water streams feeding the UF stage showed high variability in DOM content and composition. FEEM-PARAFAC analysis allowed the differentiation of seven different organic components. Additionally to the characterization and monitoring of DOM in the full-scale UF stage, a bench scale UF pilot was run to experimentally correlate the impact of water quality with membrane performance. The experiments included testing synthetic solutions of model foulants

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Estimation of Biochemical Oxygen Demand Based on Dissolved Organic Carbon, UV Absorption, and Fluorescence Measurements

Cited by 28 publications

References 19 publications

Sludge volume index and suspended solids estimation of mature aerobic granular sludge by quantitative image analysis and chemometric tools

Sludge volume index and suspended solids estimation of mature aerobic granular sludge by quantitative image analysis and chemometric tools

Impact of the wastewater-mixing zone on attenuation of pharmaceuticals in natural waters: Implications for an impact zone inclusive environmental risk assessment

Monitoring UF membrane performance treating surface-groundwater blends: Limitations of FEEM-PARAFAC on the assessment of the organic matter role

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