• flocculation of algal cells by amphoteric chitosan-based

    Flocculation of algal cells by amphoteric chitosan-based

    A kind of amphoteric chitosan-based flocculant (quaternized carboxymethyl chitosan, denoted as QCMC) has been prepared. QCMC presented significant improvement of water solubility in the whole pH range. The effects of pH, dosage, temperature and original turbidity of algal water on the flocculation performance were investigated.

  • flocculation of algal cells by amphoteric chitosan-based

    Flocculation of algal cells by amphoteric chitosan-based

    Flocculation of algal cells by amphoteric chitosan-based flocculant. Article in Bioresource Technology 170C:239-247 · August 2014 with 45 Reads How we measure 'reads' A 'read' is counted each

  • harvesting algae using flocculation and sedimentation

    Harvesting algae using flocculation and sedimentation

    Harvesting algae using flocculation and sedimentation processes Supatchalee Sophonthammaphat, Robert Edyvean Department of Chemical and Biological Engineering, The University of Sheffield, UK.

  • algal cells and coagulation, flocculation

    Algal cells and coagulation, flocculation

    Flocculation generally removes two classes of suspended particles during adsorption-coagulation, namely colloids (inorganic in nature) and bacterial and algal cells

  • flocculation of algae using chitosan springerlink

    Flocculation of algae using chitosan SpringerLink

    Flocculation of three freshwater algae, Spirulina,Oscillatoria and Chlorella, and onebrackish alga, Synechocystis, using chitosan was studiedinthe pH range 4 to 9, and chlorophyll-a concentrations inthe range 80 to 800 mg m −3, which produces aturbidity of 10 to 100 nephelometric turbidity units (NTU) in water.Chitosanreduced the algal content effectively by flocculation and settling.

  • amphoteric starch-based bicomponent modified soil

    Amphoteric starch-based bicomponent modified soil

    The Zeta potential of algal cells’ surface charge was tested after 240 min of flocculation treatment. A 10 mL sample was collected from 2 cm below the water surface and the algal cell surface charge was measured by using a Zeta-sizer 2000 (Malvern Co., UK) with the maximum detection limit of 200 mV. The algal flocs (1 mL) were carefully taken

  • flocculation properties of several microalgae and a

    Flocculation properties of several microalgae and a

    Flocculation holds great potential as a low-cost harvesting method for microalgae biomass production. Three flocculation methods (ferric chloride, chitosan, and alkaline flocculation) were compared in this study for the harvesting of 9 different freshwater and marine

  • flocculation of microcystis aeruginosa using modified

    Flocculation of Microcystis aeruginosa Using Modified

    Effect of algal flocculation on dissolved organic matters using cationic starch modified soils. Journal of Environmental Sciences 2016, DOI: 10.1016/j.jes.2015.12.018. Jihua Li, Xin Cao, Zhigang Ge, Xiaoying Yang, Zheng Zheng. Flocculation of Microcystis aeruginosa by steel slag and its safety evaluation.

  • a universal method for flocculating harmful algal blooms

    A Universal Method for Flocculating Harmful Algal Blooms

    2013-04-15· Amphoteric starch-based bicomponent modified soil for mitigation of harmful algal blooms (HABs) with broad salinity tolerance: Flocculation, algal regrowth, and ecological safety. Water Research 2019, 165, 115005. DOI: 10.1016/j.watres.2019.115005.

  • new route of chitosan extraction from blue crabs

    New route of chitosan extraction from blue crabs

    2017-12-12· The coagulation and flocculation in the area of water and wastewater treatment are the particular application of chitosan-based materials due to their low-cost and environmentally friendly behavior [4, 11, 13, 17, 19, 27, 28]. Chitosan possesses several intrinsic characteristics which make to suit as an effective coagulant and flocculant agent

  • polyamphoteric flocculants for the enhanced separation

    Polyamphoteric flocculants for the enhanced separation

    The mechanism of chemically induced algal flocculation is interpreted in terms of bridging phenomena between the discrete algal cells and the linearly extended polymer chains, forming a three

  • the effects of dissolved and bound extracellular organic

    The effects of dissolved and bound extracellular organic

    References. G.M. Hallegraeff, A review of harmful algal blooms and their apparent global increase, Phycologia., 32 (1993) 79–99. M. Mascia, A. Vacca, S. Palmas, Electrochemical treatment as a pre-oxidative step for algae removal using Chlorella vulgaris as a model organism and BDD anodes, Chem. Eng. J., 219 (2013) 512–519.; D. Vandamme, I. Foubert, K. Muylaert, Flocculation as a lowcost

  • an alternative strategy for enhanced algae removal

    An alternative strategy for enhanced algae removal

    References. B. Ghernaout, D. Ghernaout, A. Saiba, Algae and cyanotoxins removal by coagulation/flocculation: a review, Desal Wat. Treat, 20 (2010) 133–143.

  • flocculants an overview sciencedirect topics

    Flocculants an overview ScienceDirect Topics

    A high cell concentration in the broth helps flocculation by increasing the frequency of the cell-cell encounters. Cationic polyelectrolytes such as chitosan can induce efficient flocculation of freshwater microalgae at low dosages [65]. A chitosan dosage in the range of 1–10 mg L − 1 may be quite effective with freshwater microalgae [65].

  • (pdf) amphoteric starch-based bicomponent modified

    (PDF) Amphoteric starch-based bicomponent modified

    Amphoteric starch-based bicomponent modified soil for mitigation of harmful algal blooms (HABs) with broad salinity tolerance: Flocculation, algal regrowth, and ecological safety

  • flocculant an overview sciencedirect topics

    Flocculant an overview ScienceDirect Topics

    Flocculation is the first step of the harvesting; this process aims to aggregate the microalgal cells and thereby increase the particle size (Grima et al., 2003). The microalgae have a negative charge on the surface to prevent cell aggregation. The loads on the surface of algae

  • enhanced harvesting of chlorella vulgaris using

    Enhanced Harvesting of Chlorella vulgaris Using

    2016-05-20· Abstract. In this study, a novel flocculation strategy for harvesting Chlorella vulgaris with combined flocculants, poly (γ-glutamic acid) (γ-PGA) and calcium oxide (CaO), has been developed. The effect of flocculant dosage, the order of flocculant addition, mixing speed, and growth stage on the harvesting efficiency was evaluated.

  • comparison of four flocculants for removing algae

    Comparison of four flocculants for removing algae

    Cyanobacterial blooms are a significant concern in Dianchi Lake and other freshwater bodies in China. Effects of dose, duration, pH, and colony size on algae and turbidity removal in artificial water containing Microcystis aeruginosa were investigated for polymeric ferric sulfate (PFS), polymeric aluminum chloride (PAC), Al 2 (SO 4) 3 ·18H 2 O, and Fe 2 (SO 4) 3.

  • a review on chemical mechanism of microalgae

    A review on chemical mechanism of microalgae

    2019-01-04· After addition of the flocculants to the broth, they strongly interact with the single algal cells by adsorption to the surfaces and structuralization of a fibrous network between them has appeared. It was assumed that these flocculants are getting consumed to the cell wall before inciting flocculation. In this way the polymeric adsorption to

  • synthesis of an amphoteric chitosan-based flocculant

    Synthesis of an amphoteric chitosan-based flocculant

    References. S. Hussain, J. Awad, B. Sarkar, C.W.K. Chow, J.M. Duan, J. van Leeuwen, Coagulation of dissolved organic matter in surface water by novel titanium (III

  • flocculation of microcystis aeruginosa using modified

    Flocculation of Microcystis aeruginosa Using Modified

    For algal samples with densities from 1 × 108 to 5 × 109 cells/L, the optimum dosages of Q-TN to achieve more than 90% removal efficiency ranged from 0.5 to 20 mg/L, and the optimum dosages had a good linear relationship with cell density. Furthermore, the required dosage of Q-TN clearly increased along with the algae culture time, most of

  • polyamphoteric flocculants for the enhanced separation

    Polyamphoteric flocculants for the enhanced separation

    2016-08-01· Read "Polyamphoteric flocculants for the enhanced separation of cellular suspensions, Acta Biomaterialia" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • flocculation of microcystis aeruginosa using modified

    Flocculation of Microcystis aeruginosa Using Modified

    2013-05-06· Effect of algal flocculation on dissolved organic matters using cationic starch modified soils. Journal of Environmental Sciences 2016, DOI: 10.1016/j.jes.2015.12.018. Jihua Li, Xin Cao, Zhigang Ge, Xiaoying Yang, Zheng Zheng. Flocculation of Microcystis aeruginosa by steel slag and its safety evaluation.

  • the flocculating properties of chitosan‐graft

    The flocculating properties of chitosan‐graft

    Zhen Yang, Hu Yang, Ziwen Jiang, Tao Cai, Haijiang Li, Haibo Li, Aimin Li and Rongshi Cheng, Flocculation of both anionic and cationic dyes in aqueous solutions by the amphoteric grafting flocculant carboxymethyl chitosan-graft-polyacrylamide, Journal of

  • processes free full-text synthesis

    Processes Free Full-Text Synthesis

    In addition, the nutrient substance in the water causes rapid growth of algae, which in turn, has a serious impact on water quality . In severe cases, it can lead to the death of fish and other aquatic organisms. Algae cells were characterized by complex types, large amounts, small specific gravity, high negative charge and high stability .

  • breakage, regrowth, and fractal nature of natural organic

    Breakage, Regrowth, and Fractal Nature of Natural Organic

    The growth, breakage, regrowth, and fractal nature of flocs was investigated by use of a laser diffraction particle sizing device. A range of coagulants were investigated for the coagulation of natural organic matter (NOM) and compared to other coagulated systems. The results showed NOM floc structural characteristics varied in steady-state size depending upon which coagulant was used.

  • efficient cleaning of cyanobacterial blooms using

    Efficient cleaning of cyanobacterial blooms using

    Chlorophyll fluorescence showed that cyanobacterial cells were removed without damaging the membrane integrity. Overall, findings show that modified waterworks sludge flocculants have good potential for the control of algal blooms, the removal of total nitrogen and total phosphorus and the restoration of aquatic ecosystems.

  • cn101880356a preparation method of grafting

    CN101880356A Preparation method of grafting

    The invention relates to a preparation method of a grafting amphoteric chitosan flocculant, comprising the following steps: carrying out graft copolymerization

  • efficient cleaning of cyanobacterial blooms using

    Efficient cleaning of cyanobacterial blooms using

    There is thus a need for methods to remove cyanobacteria, by flocculation for instance. Here, we prepared new flocculants by modifying waterwork sewage sludge. Flocculant (A) or (B) were prepared by treating 3 g of preprocessed sludge in hydrochloric acid and heating at 200 or 250 °C for 3.0 h. Flocculant (A) and (B) were used to remove

  • flocculant cpcts-g-p (cta-dmdaac) and its flocculation

    Flocculant CPCTS-g-P (CTA-DMDAAC) and Its Flocculation

    bodies and lakes [1]. In addition, the nutrient substance in the water causes rapid growth of algae, which in turn, has a serious impact on water quality [2]. In severe cases, it can lead to the death of fish and other aquatic organisms. Algae cells were characterized by complex types, large amounts, small

  • modeling and optimization of the flocculation processes

    Modeling and optimization of the flocculation processes

    Dong C, Chen W, Liu C (2014) Flocculation of algal cells by amphoteric chitosan-based flocculant. Bioresour Technol 170:239–247 CrossRef Google Scholar Fang R, Cheng X, Xu X (2010) Synthesis of lignin-base cationic flocculant and its application in removing

  • fabrication of bifunctional chitosan-based flocculants

    Fabrication of Bifunctional Chitosan-Based Flocculants

    Combining all of the above flocculation studies, including the conductivity measurements and the fluorescence-based cell live/dead tests of Salmonella together, it could be qualitatively speculated that the Salmonella cell membrane was impaired after flocculation with high efficiency; hence, its normal metabolism and mass transfer were

  • effect of polyelectrolyte structural features

    Effect of Polyelectrolyte Structural Features

    In this paper the flocculation efficiency of chitosan, cationic polyacrylamide copolymers (Praestols), and two series of cationic starch derivatives varying in substitution degree and amylose/amylopectin ratio is investigated to answer the following questions: do cationic polysaccharides and synthetic polymers show comparable efficiency; does

  • comparison of four flocculants for removing algae

    Comparison of four flocculants for removing algae

    Cyanobacterial blooms are a significant concern in Dianchi Lake and other freshwater bodies in China. Effects of dose, duration, pH, and colony size on algae and turbidity removal in artificial water...

  • a review on chitosan-based flocculants and their

    A review on chitosan-based flocculants and their

    2016-05-15· The influence of structural elements of the chitosan-based flocculants on their flocculation properties are emphasized in this review by examining different flocculation mechanisms and their applications in the treatment of various wastewaters containing different pollutants (insoluble suspended colloids but also dissolved matters). Above all

  • the performance of chitosan/montmorillonite

    The performance of chitosan/montmorillonite

    2015-05-05· Read "The performance of chitosan/montmorillonite nanocomposite during the flocculation and floc storage processes of Microcystis aeruginosa cells, Environmental Science and Pollution Research" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • exploration on bioflocculation of nannochloropsis

    Exploration on Bioflocculation of Nannochloropsis

    Flocculation experiments were carried out in stationary growth phase of microalgae. A quantity of 50 mL of Nannochloropsis oculata was used for optimization study. The effects of bioflocculation parameters, namely, temperature, pH, time, bioflocculant concentration, and cationic inducer size, were individually experimented by analyzing flocculation efficiency.

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