Mathematical model suggested for a carbon-activated sludge system

Benedek, P.; Major, Veronika; Takács, I.

doi:10.1016/0043-1354(85)90030-2

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…The amount of PAC necessary for maximum degradation eEciency was rather high. PAC concentrations used in other studies varied between 1 g/l [5] and 3 g/l [6].…”

Section: Resultsmentioning

confidence: 99%

Effect of activated carbon on the biological treatment of oil‐water emulsions

Martienssen

Simon

1996

Acta Biotechnologica

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Waste water, derived from the reprocessing of used emulsions or suspensions, contains high concentrations of emulsified mineral oil and stabilizers, as well as different additives that are needed during the treatment process. Two stirred-tank reactors and two fixed-bed reactors were used to study the biodegradation of these waste-water compounds during two-stage biological. treatment. The waste water was first processed in an activated sludge reactor to remove easily biodegradable substances. The effluent from the first stage was treated in three parallel operating reactors: an activated sludge tank containing different amounts of powdered activated carbon (PAC, between 0 and 2%), an upflow anaerobic fixed-bed reactor and an aerobic futed-bed reactor (trickling filter). The results from the continuous treatment were compared with laboratory batch experiments.About 60% of the influent TOC was reduced by the first activated sludge treatment. The removal efficiency increased to about 70% by using a second activated sludge stage. This degradation was comparable to the maximum degree of degradation measured in laboratory batch experiments. PAC addition to the second activated sludge tank resulted in increased degradation rates. The removal efficiency increased to about 76% when 0.1% PAC was added and to 96% with 1% PAC. The removal efficiency decreased to 84% when the proportion of PAC was further increased to 2%. Variations in the amount of PAC addition per unit influent volume in the range of 50 and 200 mg/l had no significant effect on the TOC removal. Degradation models based on the M 0~0~t y p e equation were found to be in close correlation with the results obtained from batch experiments. However, the biological removal rates measured in batch experiments did not reflect the removal capacity determined in continuous operating treatment systems.

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“…The amount of PAC necessary for maximum degradation eEciency was rather high. PAC concentrations used in other studies varied between 1 g/l [5] and 3 g/l [6].…”

Section: Resultsmentioning

confidence: 99%

Effect of activated carbon on the biological treatment of oil‐water emulsions

Martienssen

Simon

1996

Acta Biotechnologica

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“…The continuous process flow model instantaneously calculates the carbon equivalent for all adsorbed components on the GAC bed volume based on the influent concentrations, using Equation (49). The removal efficiency Rem GAC,i was assigned to be 99% regarding BTEX components, 92% for a soluble unbiodegradable substrate and 90% in the case of VFA, as well as soluble biodegradable carbon and nitrogen [59,60].…”

Section: Adsorption On Granular Activated Carbonmentioning

confidence: 99%

“…The actual removal efficiency calculated using the asymmetric sigmoid expression also serves as the basis of estimating effluent state variable concentrations, as shown by Equation (60). The model with continuous process flow implementation does not consider the saturated status of the bed, so it uses the ideal removal efficiency ratio input instead.…”

Section: Adsorption On Granular Activated Carbonmentioning

confidence: 99%

Plant-Wide Models for Optimizing the Operation and Maintenance of BTEX-Contaminated Wastewater Treatment and Reuse

Bencsik,

Wadhawan,

Házi

et al. 2024

Environments

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Benzene, toluene, ethylbenzene and xylenes, collectively known as BTEX compounds, are significant emerging contaminants in municipal wastewater. Stricter effluent quality regulations necessitate their removal, especially with concerns about organic micropollutant concentrations. Water scarcity further underscores the need for wastewater treatment to ensure safe agricultural or drinking water supplies. Although biological treatment partially reduces BTEX levels through processes like biodegradation and sorption, additional purification using physico-chemical methods is crucial for substantial reduction. This paper aims to outline plant-wide simulation methods for treating BTEX-contaminated sewage and facilitating reuse, adhering to IWA Good Modelling Practice Guidelines. The model, built upon the MiniSumo process model, incorporates equations detailing BTEX metabolism and removal kinetics, informed by an extensive literature review. Using a variant of the Benchmark Simulation Model with granular activated carbon for water reuse, the study examines strategies for improving effluent quality and minimizing operational costs. These strategies include adjusting the sludge retention time and airflow to enhance BTEX degradation and stripping, respectively, and comparing maintenance approaches for the GAC tower.

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Modeling the Integration of Adsorption with Biological Processes in Wastewater Treatment

Çeçen

Aktaş

2011

Activated Carbon for Water and Wastewater Treatment

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Mathematical model suggested for a carbon-activated sludge system

Cited by 8 publications

References 3 publications

Effect of activated carbon on the biological treatment of oil‐water emulsions

Effect of activated carbon on the biological treatment of oil‐water emulsions

Plant-Wide Models for Optimizing the Operation and Maintenance of BTEX-Contaminated Wastewater Treatment and Reuse

Modeling the Integration of Adsorption with Biological Processes in Wastewater Treatment

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