Mathematical Modelling and Computer Simulation of Activated Sludge Systems

Mąkinia, Jacek; Zaborowska, Ewa

doi:10.2166/9781780409528

Cited by 18 publications

(14 citation statements)

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“…Thus, it reduces the water self-purifying ability and deteriorates the living conditions of aquatic organisms, contributing to water eutrophication (Selman and Greenhalgh 2010). Moreover, a high N-NH 4 concentration also results in the presence of free ammonia (NH 3 ), which can be toxic to fish and slows down the biological nitrification (Mąkinia and Zaborowska 2020).…”

Section: Discussionmentioning

confidence: 99%

Surface Water Pollution by Untreated Municipal Wastewater Discharge Due to a Sewer Failure

Preisner

2020

Environ. Process.

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The study is an attempt to assess the pollution impact on the aquatic ecosystem related with an emergency discharge of untreated municipal wastewater from the "Czajka" wastewater treatment plant (WWTP) in Warsaw. The present case study is based on the analysis of available monitoring data for chemical oxygen demand (COD), total nitrogen (TN), ammonia nitrogen (N-NH 4), and total phosphorus (TP) in the effluent mixing zone (MZ), the stretch of the river and before the discharge point. Data analysis was supported by a basic statistical analysis based on Pearson's correlation coefficient. The results proved the importance of efficient and reliable nutrient removal technologies used in modern WWTPs. A statistically significant correlation was achieved between the COD (r = 0.567) and TP (r = 0.714) discharged loads and their concentration in the MZ. However, no significant correlation has been identified with TN and N-NH 4. Furthermore, the dissolved oxygen (DO) deficits in the MZ were observed within 7 days of the discharge period resulting in an average DO concentration decrease from 8.4 to 7.1 mgO 2 /L. The river stretch has not been affected by DO deficits while the average observed DO concentration 30 km behind the discharge point was 9.1 mgO 2 /L. The analysis results present the pollutants assimilation capacity of a river ecosystem and its real reaction to sudden excessive nutrient loads discharge.

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Section: Discussionmentioning

confidence: 99%

Surface Water Pollution by Untreated Municipal Wastewater Discharge Due to a Sewer Failure

Preisner

2020

Environ. Process.

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“…The kinetic values selected were taken from the SUMO1 model defaults. The SUMO process model is widely used 31 and open source. Model parameters and important nitrifier kinetics for the model are shown in Table 7.…”

Section: Methodsmentioning

confidence: 99%

Advancing the understanding of mainstream shortcut nitrogen removal: resource efficiency, carbon redirection, and plant capacity

McCullough

Klaus

Parsons

et al. 2022

Environ. Sci.: Water Res. Technol.

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“…Like COD fractions, nitrogen fractions are divided into five kinds depending on biodegradability and solubility: ammonia, soluble biodegradable organic nitrogen (ON) and inert soluble ON, particulate ON and inert particulate ON (Ragaa et al, 2016). Many studies have observed that ammonia accounts for about 60-75% of TKN in domestic wastewater and it lacks coupling bonds with organic nitrogen so the organic nitrogen components do not need to be separated like organic components (Li et al, 2017;Makinia & Zaborowska, 2020). The use of the initial nitrogen conversion coefficient (iN) of ASM No.…”

Section: Introductionmentioning

confidence: 99%

“…2d and the specified COD fractionation for percent organic nitrogen analysis requires considering differences in nitrogen content between organic matter biodegradable XS and inert organic matter XI. This approach distinguishes TKN fractions better by excluding heterotrophic biomass (Makinia & Zaborowska, 2020).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Wastewater Quality and Denitrification Potential of Domestic Wastewater

Khanh,

Chuang

2024

Preprint

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Developing a simulation model requires precision in the parameters of the wastewater quality components. This study investigated the fractions of chemical oxygen demand (COD) and total nitrogen (TN) in influent and effluent at a domestic wastewater treatment plant in Taiwan. As per the COD categorization, raw wastewater includes 12.6% readily biodegradable COD and 45.6% slowly biodegradable COD that can participate in the denitrification process. Meanwhile, up to 62.8% ammonia nitrogen was present in wastewater, according to the TN classification. As a result, when using raw wastewater as a carbon source, the optimal COD/NO3-N was 6, indicating a low denitrification efficiency (merely 50% compared to 95% for acetate as a carbon source). The abundance of slowly biodegradable COD coupled with the denitrification rate of 0.73 mg N/g VSS.hr was approximately half the denitrification rate of readily biodegradable COD (1.67 mg N/g VSS.hr). Furthermore, this study has also shown the potential to use slowly biodegradable carbon sources in the denitrification process by contributing to improving the reduction efficiency by more than 50% when applying both carbon sources.

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Mathematical Modelling and Computer Simulation of Activated Sludge Systems

Cited by 18 publications

References 0 publications

Surface Water Pollution by Untreated Municipal Wastewater Discharge Due to a Sewer Failure

Surface Water Pollution by Untreated Municipal Wastewater Discharge Due to a Sewer Failure

Advancing the understanding of mainstream shortcut nitrogen removal: resource efficiency, carbon redirection, and plant capacity

Characterization of Wastewater Quality and Denitrification Potential of Domestic Wastewater

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