Multiple-objective evaluation of wastewater treatment plant control alternatives

Flores-Alsina, Xavier; Gallego, Alejandro; Feijoo, Gumersindo; Rodríguez-Roda, Ignasi

doi:10.1016/j.jenvman.2010.01.009

Cited by 66 publications

(25 citation statements)

References 36 publications

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“…78 Often, the most suitable criteria for a judgement of alternatives are interconnected and present multiple interactions between them. 78,79 Given that all indicators may not be completely independent, the selection of an appropriate aggregation method gains great importance as some methods are more susceptible to interference than others. For example, the weighted sum (a compensatory method) is sensitive to the presence of dependent criteria in the form of 'double-counting' in contrast to the ELECTRE III method which uses a non-compensatory aggregation approach.…”

Section: Reliability Of the Results And Limitations Of The Studymentioning

confidence: 99%

Assessing the sustainability of on-site sanitation systems using multi-criteria analysis

Vidal

Hedström

Barraud

et al. 2019

Environ. Sci.: Water Res. Technol.

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Section: Reliability Of the Results And Limitations Of The Studymentioning

confidence: 99%

Assessing the sustainability of on-site sanitation systems using multi-criteria analysis

Vidal

Hedström

Barraud

et al. 2019

Environ. Sci.: Water Res. Technol.

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“…However, such studies refer mainly to CAS systems (among others, [19][20][21]). Despite the useful results from previous literature studies, the transferability of the results derived for CAS is limited and cannot be directly referred to MBR which requires dedicated and ad-hoc studies [22].…”

Section: Introductionmentioning

confidence: 99%

The fouling phenomenon in membrane bioreactors: Assessment of different strategies for energy saving

Mannina

Cosenza

2013

Journal of Membrane Science

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a b s t r a c tMembrane fouling represents one of the major issues for a membrane bioreactor (MBR). Membrane fouling and high aeration requirements (for inducing shear stress to limit fouling) make MBR operation economically demanding due to high energy costs. Although several studies on MBR fouling have been performed, comprehensive knowledge on how to reduce membrane fouling and consequently save energy is still lacking.An integrated mathematical model for MBR is applied to a University of Cape Town membrane bioreactor with the final aim to reduce the energy costs. In particular, the influence of the aeration intensity, the duration of filtration/backwashing cycles, and the number of membrane cleanings are investigated. Five scenarios are analyzed and compared, each implementing different operating conditions. The features of the analyzed scenarios are quantified by employing Monte Carlo simulations and performance indices partially drawn from literature. The results provide insights about the role played by the main physical/chemical/biological processes in view of a system optimization. As expected, MBR operation at low air flow rate (qa) leads to a substantial reduction of the operational costs (specifically, 20% with respect to the suggested manufacturers ones in terms of qa). Despite such a reduction of qa, a good effluent quality is also obtained as an effect of a high biological cake thickness. Results also show that the values of filtration time (Tf) higher than those suggested by manufacturers (e.g., Tf ¼ 9 min) can be used to increase effluent quality. This study demonstrates that both energy savings and effluent quality can be improved by varying the operational variables with respect to those of the suggested manufacture. One of the main insights gained from this study is that the values of the operating variables (i.e., qa, Tb and Tf) suggested by the manufactures can be changed to obtain a system that still respects high effluent quality and is characterized by lower economical cost. The proposed modeling approach can be an useful tool for the optimization of the operating conditions in order to reduce the operational costs for MBR systems.

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“…Several studies aimed to design optimal control structures accounting for other criteria than effluent quality, such as environmental impact or microbiological risks (13)(14). However, resource recovery was often disregarded or only partially considered (e.g.…”

Section: Introductionmentioning

confidence: 99%

Control structure design for resource recovery using the enhanced biological phosphorus removal and recovery (EBP2R) activated sludge process

Valverde-Pérez

Fuentes-Martínez

Flores-Alsina

et al. 2016

Chemical Engineering Journal

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Multiple-objective evaluation of wastewater treatment plant control alternatives

Cited by 66 publications

References 36 publications

Assessing the sustainability of on-site sanitation systems using multi-criteria analysis

Assessing the sustainability of on-site sanitation systems using multi-criteria analysis

The fouling phenomenon in membrane bioreactors: Assessment of different strategies for energy saving

Control structure design for resource recovery using the enhanced biological phosphorus removal and recovery (EBP2R) activated sludge process

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