Population mobility and urban wastewater dynamics

Atinkpahoun, Chrystelle N.H.; Le, Nang Dinh; Pontvianne, Steve; Poirot, Hélène; Leclerc, Jean-Pierre; Pons, Marie‐Noëlle; Soclo, Henri H.

doi:10.1016/j.scitotenv.2017.12.087

Cited by 29 publications

(26 citation statements)

References 57 publications

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“…The BSM2 plant comprises primary clarification and activated sludge process units in the water line and anaerobic digestion, thickening and dewatering operations in the sludge line (Figure 1). The plant is designed for an average influent dry weather flow rate of 20,648.36 m 3 /d and an average biodegradable chemical oxygen demand (COD) in the influent of 592.53 g/m 3 . Its hydraulic retention time, computed considering average dry weather flow rate and total tank volume of 18,900 m 3 , is 22 h (total tank volume includes: primary clarifier (900 m 3 ) + biological reactor (12,000 m 3 ) + secondary clarifier (6000 m 3 )) [18,19].…”

Section: Description Of the Wastewater Treatment Plant And Control Strategies Benchmark Simulation Model No 2 (Bsm2) Platformmentioning

confidence: 99%

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confidence: 99%

“…The objective of operation strategy is to maintain levels of pollutants in the effluent, such as Nitrogen (Ntot), ammonium (SNH), nitrates (SNO), total chemical oxygen demand (CODt), total suspended solids (TSS) and biological oxygen demand (BOD5), bellow the limits given by effluent quality requirements. The indicators considered in this work are given by BSM2 platform [17][18][19]: Ntot < 18 gN/m 3 , SNH < 4 gN/m 3 , CODt < 100 gCOD/m 3 In this work, two alternatives to the DO control scheme of the default BSM2 strategy described above (Figure 2a) are considered (See Figure 2b,c): The three closed-loop control schemes (DO default, DO + NO control and Cascade S NHSP ) use PI controllers of the form:…”

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Quantifying the Benefit of a Dynamic Performance Assessment of WWTP

et al. 2020

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In this work a comprehensive analysis of the environmental impact of the operation of a wastewater treatment plant (WWTP) using different control strategies is carried out considering the dynamic evolution of some environmental indicators and average operation costs. The selected strategies are PI (proportional integral) control schemes such as dissolved oxygen control in the aerobic zone (DO control), DO control and nitrates control in the anoxic zone (DO + NO control) and regulation of ammonium control at the end of aerobic zone (Cascade SNHSP) commonly used in WWTPs to maintain the conditions that ensure the desired effluent quality in a variable influent scenario. The main novelty of the work is the integration of potential insights into environmental impact from the analysis of dynamic evolution of environmental indicators at different time scales. The consideration of annual, bimonthly and weekly temporal windows to evaluate performance indicators makes it possible to capture seasonal effects of influent disturbances and control actions on environmental costs of wastewater treatment that are unnoticed in the annual-based performance evaluation. Then, in the case of periodic events, it is possible to find solutions to improve operation by the adjustment of the control variables in specific periods of time along the operation horizon. The analysis of the annual average and dynamic profiles (weekly and bimonthly) of environmental indicators showed that ammonium-based control (Cascade SNHSP) produce the best compromise solution between environmental and operation costs compared with DO control and DO + NO control. An alternative control strategy, named SNHSP var Qcarb var, has been defined considering a sequence of changes on ammonium set-point (SNHSP) and carbon dosage (Qcarb) on different temporal windows. It is compared with DO control considering weekly and bimonthly profiles and annual average values leading to the conclusion that both strategies, Cascade SNHSP and SNHSP var Qcarb var, produce an improvement of dynamic and annual average environmental performance and operation costs, but benefits of Cascade SNHSP strategy are associated with reduction of electricity consumption and emissions to water, while SNHSP var Qcarb var strategy reduces electricity consumption, use of chemicals (reducing external carbon dosage) and operation costs.

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Section: Description Of the Wastewater Treatment Plant And Control Strategies Benchmark Simulation Model No 2 (Bsm2) Platformmentioning

confidence: 99%

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Quantifying the Benefit of a Dynamic Performance Assessment of WWTP

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“…In this way, to increase the conductivity and to evaluate the effect of the supporting electrolyte on the ATL abatement, different sodium sulfate concentrations were tested: 0.014, 0.028 and 0.056 M of Na 2 SO 4 . The pH of the working solution was set in 9 for all experiments with NaOH 2 M, when necessary, since the pH of the post-treatment municipal wastewater is neutral or weakly basic (Atinkpahoun et al, 2018).…”

Section: Chemicals and Solutionsmentioning

confidence: 99%

Study of the atenolol degradation using a Nb/BDD electrode in a filter-press reactor

et al. 2019

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The present paper deals with the atenolol (ATL) degradation by advanced anodic oxidation using a boron-doped diamond anode supported on niobium (Nb/BDD). Cyclic voltammetry performed on this electrode revealed that it presents a high quality (diamond-sp 3 /sp 2 -carbon ratio), high potential for OER and that ATL can be oxidized directly and/or indirectly by the electrogenerated oxidants, such as hydroxyl radicals, persulfate ions and sulfate radicals.Electrolysis experiments demonstrated that ATL degradation and mineralization follow a mixed (first and zero) order kinetics depending on the applied current density.At high applied current densities, the amount of OH radicals is very high and the overall reaction is limited by the transport of ATL (pseudo first-order kinetics) whereas for low applied current densities, the rate of OH radicals generation at the anode is slower than the rate of arrival of ATL molecules (pseudo-zero order kinetics). Estimated values of

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“…The key driver of household water consumption in an area is the total population. Census data are commonly used to inform household consumption in the context of wastewater (Blokker et al, 2010;Atinkpahoun et al, 2018). In addition, the UK census data is freely available anywhere in the UK (Office for National Statistics, 2011), and conducive toward reproducible research through the Office for National Statistics' API (Smith, 2017).…”

Section: A Population Presence Model For the Ukmentioning

confidence: 99%

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Population mobility and urban wastewater dynamics

Cited by 29 publications

References 57 publications

Quantifying the Benefit of a Dynamic Performance Assessment of WWTP

Quantifying the Benefit of a Dynamic Performance Assessment of WWTP

Study of the atenolol degradation using a Nb/BDD electrode in a filter-press reactor

Data_Sheet_2.docx

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