Flocculation dynamics of cell associated suspended particulate matter
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Flocculation dynamics of cell associated suspended particulate matter
Flocculation dynamics of cell-associated suspended particulate matterThu Ha NguyenSchool of Civil Engineering Faculty of Engineering The University of Flocculation dynamics of cell associated suspended particulate matter f SydneyA thesis submitted to fulfil requirements for the degree of Doctor of PhilosophySupervisor: Assoc. Prof. Federico Maggi Auxiliary supervisors: Prof. John Patterson Dr. Fiona Tang2020AbstractTransport of suspended particulate mailer (SPM) plays a vital role in controlling large-scale processe Flocculation dynamics of cell associated suspended particulate matter s related to geophysical Hows such as dispersal and sinking of organic matter and contaminants to offshore and deep walers, nutrient cycles, food webFlocculation dynamics of cell associated suspended particulate matter
stability, morphodynamics and sedimentation in both limnetic and pelagic ecosystems. Although it has heen recognized that small-scale microbial procesFlocculation dynamics of cell-associated suspended particulate matterThu Ha NguyenSchool of Civil Engineering Faculty of Engineering The University of Flocculation dynamics of cell associated suspended particulate matter SPM dynamics is still not well characterized. This thesis focuses on quantifying the attached biomass fraction on SPM aggregates and investigating its contribution to SP.M flocculation dynamics, which consequently control SPM aggregate geometrical properties and transport. A novel laboratory-based O Flocculation dynamics of cell associated suspended particulate matter ptical Measurement of Cell Colonization (OMCEC) system and a microbiological-physical model (B1L0C2) are the main achievements of this thesis that allFlocculation dynamics of cell associated suspended particulate matter
ow the analyses of the correlations between environmental conditions, aggregate-attached biomass fraction, cell colonization patterns, aggregate size,Flocculation dynamics of cell-associated suspended particulate matterThu Ha NguyenSchool of Civil Engineering Faculty of Engineering The University of Flocculation dynamics of cell associated suspended particulate matter s, and motion of individual suspended aggregates in a non-invasive and nondestructive way. OMCEC consists of a full-color high-resolution optical system and real-time algorithms for (i) material segmentation based on light spectra emission analysis, (ii) quantification of various geometrical propert Flocculation dynamics of cell associated suspended particulate matter ies, and (iii) motion detection with micro particle tracking velocimetry (pPTV). OMCEC was applied herein on three types of aggregates: cell-associateFlocculation dynamics of cell associated suspended particulate matter
d minerals, cell-associated microplastics, and three-phase aggregates made of minerals, microplastics, and biological mailer.OMCEC application on SaccFlocculation dynamics of cell-associated suspended particulate matterThu Ha NguyenSchool of Civil Engineering Faculty of Engineering The University of Flocculation dynamics of cell associated suspended particulate matter concentration. The attached biomass fraction was found to increase nonlinearly regarding an increase of aggregate size hut almost constant with fractal dimension variation. Cell distribution on mineral surfaces was then analyzed and classified into three colonization patterns: (i) scattered, (ii) w Flocculation dynamics of cell associated suspended particulate matter ell-touched, and (iii) poorly-touched, with the second being predominant. Cell dusters in the well-touched patient were found to have lower fractal diFlocculation dynamics of cell associated suspended particulate matter
mension than those in the other patterns. A strong correlation of colonization patterns with aggregate biomass fraction and properties suggests dynamiFlocculation dynamics of cell-associated suspended particulate matterThu Ha NguyenSchool of Civil Engineering Faculty of Engineering The University of Flocculation dynamics of cell associated suspended particulate matter MCEC application on microplastics (MPs) being colonized by natural biological matter from Hawkesbury River. NSW. Australia demonstrated that the biomass fraction of MP aggregates has substantial control over their size, shape and. most importantly, their settling velocity. Polyurethane MP aggregates Flocculation dynamics of cell associated suspended particulate matter made of 80% biological matter had an average size almost double that of MP aggregates containing 5% biological matterand sank two times slower. BasedFlocculation dynamics of cell associated suspended particulate matter
on our experimental data, we introduce a settling velocity equation that accounts for the shape irregularity and fractal structure of MP aggregates. Flocculation dynamics of cell-associated suspended particulate matterThu Ha NguyenSchool of Civil Engineering Faculty of Engineering The University of Flocculation dynamics of cell associated suspended particulate matter t the settling flux of MP aggregates made of different polymers and various types of biological matter.To consider the complex genesis of cell-associated mineral aggregates, the BFLOC2 model was introduced to predict aggregate geometry' and settling velocity under simultaneous effects of hydrodynami Flocculation dynamics of cell associated suspended particulate matter c and biological processes. While minerals can contribute to aggregate dynamics through collision, aggregation, and breakup, living microorganisms canFlocculation dynamics of cell associated suspended particulate matter
colonize and establish food web interactions that involve growth and grazing, and modify the aggregate structure. Modeling of cel I-associated mineraFlocculation dynamics of cell-associated suspended particulate matterThu Ha NguyenSchool of Civil Engineering Faculty of Engineering The University of Flocculation dynamics of cell associated suspended particulate matter ccur at different optimal environmental conditions. Unlike mineral aggregates, which have maximum size when shear rates tend to zero, a relative maximum size of cell-associated mineral aggregates can be reached at intermediate shear rates as a result of microbiological processes. The settling veloci Flocculation dynamics of cell associated suspended particulate matter ty was ultimately controlled by aggregate size, fractal dimension, and biomass fraction.The innovative aspect of this thesis is the simultaneous quantFlocculation dynamics of cell associated suspended particulate matter
ification of composition, architecture. and settling velocity of individual aggregates. Therefore, it puts forth the analysis and prediction of cell cFlocculation dynamics of cell-associated suspended particulate matterThu Ha NguyenSchool of Civil Engineering Faculty of Engineering The University of Flocculation dynamics of cell associated suspended particulate matter r monitoring programs to estimate the biological content based on SPM size, capacity dimension, and settling velocity, which can be measured using in-siltt methods. Furthermore, the evidence and tools to quantify the sinking and floating of microplastic subjected to bio-fouling can be implemented in Flocculation dynamics of cell associated suspended particulate matter microplastics transport models to enable the three-dimension modeling of both low- and high-density microplastics. The BFLOC2 model can be coupled toFlocculation dynamics of cell associated suspended particulate matter
traditional sediment transport models to better describe the sediment formation dynamics, thus giving a more precise prediction of sedimentation and Flocculation dynamics of cell-associated suspended particulate matterThu Ha NguyenSchool of Civil Engineering Faculty of Engineering The University ofFlocculation dynamics of cell-associated suspended particulate matterThu Ha NguyenSchool of Civil Engineering Faculty of Engineering The University ofGọi ngay
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