Understanding the effects of bulk mixing on the determination of the affinity index: Consequences for process operation and design

7Citations
Citations of this article
21Readers
Mendeley users who have this article in their library.

Abstract

The main objective of this study is to demonstrate the importance of mixing conditions as a source of inconsistencies between half-saturation indices in comparable systems (e.g. conventional activated sludge, membrane bioreactor) when operated at different conditions or different scales. As proof-ofprinciple, an exemplary system consisting of the second vessel of a hybrid respirometer has been studied. The system has been modeled both using an integrated computational fluid dynamics (CFD)- biokinetic model (assumed to represent the physical system) and a tanks-in-series, completely stirred tank reactor biokinetic model (representing the applied model). The results show that different mixing conditions cause deviations in the half-saturation indices calculated when matching the applied model to the physical system performance. Additionally, sensor location has been shown to impact the calculation of half-saturation indices in the respirometric system. This will only become more pronounced at larger scales. Thus, mixing conditions clearly affect operation and design of wastewater treatment reactors operated at low substrate concentrations. Both operation and design can be improved with the development and application of integrated CFD-biokinetic or compartmental models.

References Powered by Scopus

Simultaneous nitrification and denitrification in bench-scale sequencing batch reactors

431Citations
N/AReaders
Get full text

Performance of a bioreactor with submerged membranes for aerobic treatment of municipal waste water

310Citations
N/AReaders
Get full text

Study of operational conditions of simultaneous nitrification and denitrification in a Carrousel oxidation ditch for domestic wastewater treatment

153Citations
N/AReaders
Get full text

Cited by Powered by Scopus

The future of WRRF modelling - Outlook and challenges

37Citations
N/AReaders
Get full text

CFD simulation of a novel anaerobic-anoxic reactor for biological nutrient removal: Model construction, validation and hydrodynamic analysis based on OpenFOAM®

9Citations
N/AReaders
Get full text

Advanced biokinetic and hydrodynamic modelling to support and optimize the design of full-scale high rate algal ponds

8Citations
N/AReaders
Get full text

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Cite

CITATION STYLE

APA

Arnaldos, M., Rehman, U., Naessens, W., Amerlinck, Y., & Nopens, I. (2018). Understanding the effects of bulk mixing on the determination of the affinity index: Consequences for process operation and design. Water Science and Technology, 77(3), 576–588. https://doi.org/10.2166/wst.2017.550

Readers over time

‘18‘19‘20‘21‘22‘23036912

Readers' Seniority

Tooltip

PhD / Post grad / Masters / Doc 6

40%

Researcher 5

33%

Professor / Associate Prof. 3

20%

Lecturer / Post doc 1

7%

Readers' Discipline

Tooltip

Engineering 11

69%

Environmental Science 4

25%

Biochemistry, Genetics and Molecular Bi... 1

6%

Save time finding and organizing research with Mendeley

Sign up for free
0