Journal ArticleDOI
Biodegradation by immobilized bacteria in an airlift‐loop reactor—influence of biofilm diffusion limitation
K. Wagner,D. C. Hempel +1 more
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From these experiments, the influence of biofilm diffusion limitation on reaction kinetics and criteria for stable biofilm formation on sand particles were obtained.Abstract:
Naphthalene-2-sulfonate was degraded by submerse growing Pseudomonads in a chemostat culture. The kinetic parameters for the Monod equation, including Pirts maintenance energy, were calculated from these experiments regarding naphthalene-2-sulfonate as substrate and oxygene as cosubstrate. By immobilizing the bacteria on sand particles, the degradation of naphthalene-2-sulfonate was carried out in a specialy designed three-phase airlift-loop reactor in a completely fluidized state. From these experiments, the influence of biofilm diffusion limitation on reaction kinetics and criteria for stable biofilm formation on sand particles were obtained.read more
Citations
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A review of experimental measurements of effective diffusive permeabilities and effective diffusion coefficients in biofilms.
TL;DR: It is proposed that largesolutes are effectively excluded from microbial cells, that small solutes partition into and diffuse within cells, and that ionic solutes are excluded from cells but exhibit increased diffusive permeability (but decreased effective diffusion coefficients) due to sorption to the biofilm matrix.
Journal ArticleDOI
Formation and growth of heterotrophic aerobic biofilms on small suspended particles in airlift reactors.
TL;DR: The effect of hydraulic retention time and of substrate loading rate on the formation of biofilms were investigated and it was found that at longer hydraulic retention times, a low amount of attached biomass can be present on the carrier material as patchy biofilm.
Journal ArticleDOI
Landolt-Bornstein, Zahlenwerte Und Funktionen Aus Physik, Chemie, Astronomie, Geophysik Und Technik
Journal ArticleDOI
Role of hydrodynamic shear in the cultivation of animal, plant and microbial cells
TL;DR: The rapid developments in biotechnology have resulted in the identification and use of a large variety of biologically active substances produced from microbial, plant and animal origin, which range from enzymes and antibiotics to highly complex molecules such as immunoglobulins, growth factors and hormones.
Journal ArticleDOI
A novel membrane bioreactor for detoxifying industrial wastewater: I. Biodegradation of phenol in a synthetically concocted wastewater
TL;DR: A mathematical model showed that the attached biofilm significantly lowers the mass transfer driving force for phenol across the membrane, and oxygen concentration limits the phenol degradation rate in the biofilm.
References
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Journal ArticleDOI
The Growth of Bacterial Cultures
TL;DR: Bacterial growth is considered as a method for the study of bacterial physiology and biochemistry, with the interpretation of quantitative data referring to bacterial growth limited to populations considered genetically homogeneous.
Journal ArticleDOI
The Maintenance Energy of Bacteria in Growing Cultures
TL;DR: From the laws of growth, a simple relation between the maintenance requirement, the growth yield and the growth rate is derived and is shown to be in good agreement with the available data.
Journal ArticleDOI
Microbial metabolism of haloaromatics: isolation and properties of a chlorobenzene-degrading bacterium
W Reineke,H J Knackmuss +1 more
TL;DR: Respiration data and enzyme activities in cell extracts as well as the isolation of 3-chlorocatechol from the culture fluid are consistent with the degradation of chlorobenzene via3-chloro-cis-1,2-dihydroxycyclohexa-3,5-diene, 3- chlorocatedchol, 2-chlorosine, cis-muconate, trans-4-carboxymethylenebut-2-en-
Journal ArticleDOI
Landolt-Bornstein, Zahlenwerte Und Funktionen Aus Physik, Chemie, Astronomie, Geophysik Und Technik
Journal ArticleDOI
Degradation of chlorophenols by a defined mixed microbial community.
TL;DR: During adaptation to high loads of chlorophenols the initial meta- Cleavage activity was completely replaced by ortho-cleavage activity of type I and II and total degradation of the organic carbon was indicated by release of stoichiometric amounts of chloride and low content of dissolved organic carbon in the cell-free effluents.
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