Flotation of <i>Escherichia coli</i> with some inorganic salts

Gaudin, A. M.; Davis, Norman S.; Bangs, Sonia E.

doi:10.1002/bit.260040212

Cited by 11 publications

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(15). These estimates follow from the 'Lagrangian paths' [22] (see also [32,33]) of given sets of particles, which can be constructed from the succession of concentration profiles. …”

Section: Comparison With X-ray Concentration and Excess Pore Pressurementioning

confidence: 99%

Applications of the phenomenological theory to several published experimental cases of sedimentation processes

Bürger

Concha

Tiller

2000

Chemical Engineering Journal

View full text Add to dashboard Cite

In one space dimension, the phenomenological theory of sedimentation predicts the sedimentation-consolidation behavior of a flocculated suspension in dependence of two constitutive functions describing its material behavior, the solids flux density (or hindered settling function) and the solid effective stress. These functions are assumed to depend only on the local volumetric solids concentration. In this contribution, we review several experimental and theoretical studies of sedimentation in settling columns. We first resume the theories that have been employed to interpret the experimental measurements and then apply the phenomenological model to the available data. The two constitutive functions involved are determined from the published concentration, permeability and effective stress data. The mathematical model is then solved numerically using these functions, and the resulting predictions of settling behavior are compared with the respective authors' experimental findings and interpretations. In one case, the information obtained from a batch settling experiment is used to simulate continuous sedimentation.

show abstract

“…(15). These estimates follow from the 'Lagrangian paths' [22] (see also [32,33]) of given sets of particles, which can be constructed from the succession of concentration profiles. …”

Section: Comparison With X-ray Concentration and Excess Pore Pressurementioning

confidence: 99%

Applications of the phenomenological theory to several published experimental cases of sedimentation processes

Bürger

Concha

Tiller

2000

Chemical Engineering Journal

View full text Add to dashboard Cite

show abstract

Microflotation: New low gas‐flow rate foam separation technique for bacteria and algae

Rubin

Cassel

Henderson

et al. 1966

Biotech & Bioengineering

View full text Add to dashboard Cite

Foam separation of microorganisms has been investigated with varying success by many workers, usually a t high rates of gas flow. Microflotation was developed to overcome some of the disadvantages inherent in these high gas-flow-rate processes and is introduced in this paper as a new technique for the foam separation of microorganisms at low gas-flow rates. With microflotat>ion, a stable surface phase is produced by adding an insoluble collector such as a long-chain fatt>y acid or amine. The formation of an irrsoluble surface phwe eliminates the need for high foaming. Low rat,es of gas flow are used resulting in a more efficient separation and a less voluminous and drier surface phase upon which to collect, the microorganisms. The efficiency of this technique is also improved by using flotation aids such as frothers and floccu1ent)s. Frothers are used to improve the collector properties of the surfactant and to refine further the small bubbles produced by a very fine sparger. Small concentrations of flocculents, such as alum, are used to partially agglomerate the organisms and provide sites for adsorption of collector. The work described in this paper is preliminary in nature, designed to illustrate that a low flow-rate process may be used to separate microorganisms and to stimulate further research. The applications discussed are removal of the bacterium, Escherichia coli, using lauric acid and alum, and two species of algae, Chlamydmmas reinhardtii and Chlorella ellipsoidea, using stearylamine without alum. The frother used was ethanol.

show abstract

Foam separation of Escherichia Coli with a cationic surfactant

Grieves¹,

Wang²

1966

Biotech & Bioengineering

View full text Add to dashboard Cite

An experimental investigation of the foam separation of E . coli from distilled water suspension using a cationic surface-active agent, ethylhexadecyldimethylammonium bromide (EHDA-Br) is presented. Results are evaluated in terms of total cell count, using a membrane filtrat,ion t,echnique. Cell concentrations iri the initial suspensions are varied from 5.0 X lo5 to 1 .0 x 108 cells/ml. Surfactant concentrations in the initial cell suspensions are varied from 0.015 t,o 0.040 mg./ml., and foaming times are varied from 2 to 20 min. The residual quantity of cells decreases exponentially with foaming t,ime to about 0.027c of the initial quantit'y after 20 min. The cell enrichment rat,io, varying from 10 t,o 1,000,000, is an inverse power function of the initial stirfactant concentration and an exponential function of foaming time. Foaminess decreases with increasing initial cell concentrations, and for an initial surfactant concentration of 0.030 mg./ml., ()he residual cell concentration is a 1inea.r function of the initial cell concentration.

show abstract

Flotation of Escherichia coli with some inorganic salts

Cited by 11 publications

References 4 publications

Applications of the phenomenological theory to several published experimental cases of sedimentation processes

Applications of the phenomenological theory to several published experimental cases of sedimentation processes

Microflotation: New low gas‐flow rate foam separation technique for bacteria and algae

Foam separation of Escherichia Coli with a cationic surfactant

Contact Info

Product

Resources

About