Statistical optimization of process parameters for ultrafiltration of olive oil mill wastewaters

Akdemir, Ezgi Oktav; Özer, Adem

doi:10.1080/19443994.2013.765363

Cited by 2 publications

(1 citation statement)

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“…The mechanical aspects of coagulation-flocculation are important, especially for determining the optimal removal efficiency. The mechanism of coagulation-flocculation can be described by two stages: (1) agitation (mixing speed and time) and (2) settling [ 29 , 41 , 42 ]. The first stage allows for rapid mixing of the coagulant with the dispersion and formation of the flocs, and the second stage allows floc formation with suitable settling of solids from the system.…”

Section: Effect Of Operating Parameters Of the Coagulation-flocculmentioning

confidence: 99%

Investigation of Self-Assembly Processes for Chitosan-Based Coagulant-Flocculant Systems: A Mini-Review

Bhalkaran

Wilson

2016

IJMS

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The presence of contaminants in wastewater poses significant challenges to water treatment processes and environmental remediation. The use of coagulation-flocculation represents a facile and efficient way of removing charged particles from water. The formation of stable colloidal flocs is necessary for floc aggregation and, hence, their subsequent removal. Aggregation occurs when these flocs form extended networks through the self-assembly of polyelectrolytes, such as the amine-based polysaccharide (chitosan), which form polymer “bridges” in a floc network. The aim of this overview is to evaluate how the self-assembly process of chitosan and its derivatives is influenced by factors related to the morphology of chitosan (flocculant) and the role of the solution conditions in the flocculation properties of chitosan and its modified forms. Chitosan has been used alone or in conjunction with a salt, such as aluminum sulphate, as an aid for the removal of various waterborne contaminants. Modified chitosan relates to grafted anionic or cationic groups onto the C-6 hydroxyl group or the amine group at C-2 on the glucosamine monomer of chitosan. By varying the parameters, such as molecular weight and the degree of deacetylation of chitosan, pH, reaction and settling time, dosage and temperature, self-assembly can be further investigated. This mini-review places an emphasis on the molecular-level details of the flocculation and the self-assembly processes for the marine-based biopolymer, chitosan.

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Section: Effect Of Operating Parameters Of the Coagulation-flocculmentioning

confidence: 99%