Influence of COM-peptides/proteins on the properties of flocs formed at different shear rates
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985874%3A_____%2F19%3A00497268" target="_blank" >RIV/67985874:_____/19:00497268 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/19:10397561
Result on the web
<a href="http://hdl.handle.net/11104/0295777" target="_blank" >http://hdl.handle.net/11104/0295777</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jes.2018.11.025" target="_blank" >10.1016/j.jes.2018.11.025</a>
Alternative languages
Result language
angličtina
Original language name
Influence of COM-peptides/proteins on the properties of flocs formed at different shear rates
Original language description
Coagulation followed by floc separation is a key process for the removal of algal organic matter (AOM) in water treatment. Besides optimizing coagulation parameters, knowledge of the properties of AOM-flocs is essential to maximizing AOM removal. However, the impact of AOM on the floc properties remains unclear. This study investigated how peptides/proteins derived from the cellular organic matter (COM) of the cyanobacterium Microcystis aeruginosa influenced the size, structure, and shape of flocs formed at different shear rates (G). Flocs formed by kaolinite, COM-peptides/proteins and a mixture of the same were studied, and the effect of intermolecular interactions between floc components on floc properties was assessed. The coagulation experiments were performed in a Taylor-Couette reactor, with aluminum (Al) or ferric sulphate (Fe) utilized as coagulants. Image analysis was performed to gauge floc size and obtain data on fractal dimension. It was found that floc properties were affected by the presence of the COM-peptides/proteins and the coagulant used. COM-peptides/proteins increased floc size and porosity and widened floc size distributions. The Fe coagulant produced larger and less compact flocs than Al coagulant. Moreover, the decrease in floc size that occurred in parallel with increase in shear rate was not smooth in progress. A rapid change for the kaolinite-coagulant suspension and two rapid changes for the suspensions containing COM were observed. These were attributed to various intermolecular interactions between floc components participating in coagulation at different G. Based on the results obtained, shear rates suitable for efficient separation of flocs containing COM were suggested. (C) 2018 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)
Result continuities
Project
<a href="/en/project/GA18-05007S" target="_blank" >GA18-05007S: Influence of algal organic matter on properties of flocs formed during coagulation/flocculation in water treatment</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Environmental Sciences
ISSN
1001-0742
e-ISSN
1878-7320
Volume of the periodical
80
Issue of the periodical within the volume
June
Country of publishing house
CN - CHINA
Number of pages
12
Pages from-to
116-127
UT code for WoS article
000463379500012
EID of the result in the Scopus database
2-s2.0-85058622720