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1

Bioprocess engineering

100%
Szewczyk K. W.
Biotechnologia
|
2002
|
issue 4
9-22
EN
The role, basic concepts and development of bioprocess engineering have been presented. Biochemical engineers have always served as a bridge between discoveries involving enzymes, cells and biomass at the lab scale to implementation of valuable bioproducts on the commercial scale. Biochemical engineering discipline was initiated focusing on problems concerning bioreactor design and the optimisation and the purification of natural products. Nowadays, this discipline is a field undergoing a rapid change and diversification. Key concepts in transport phenomena, kinetics and thermodynamics, as well as proficiency in the application of mathematical tools in process modelling are used to bridge the gap between the intellectual potential of the gene to the manufacturing of industrial products.
2

Mercury removal from aqueous solutions by biotransformation

75%
Ledakowicz S., Deckwer W.-D.
Biotechnologia
|
1993
|
issue 3
99-107
EN
Experimental investigations of of mercury Hg(O) in by were carried out in two types of lab : in fixed and fluized bed. An isolated and identified natural strain of Aeromoans hydrophila was immobilized on the surfaces of porous carriers and employed in mercury removal from liquid phase in the fixed bed reactor. For mercury biotransformation in the fluidized bed a geneticaly modified strain of Pseudomonas putida KT2442:: mer 73 entraped in PVA gel beads was used. The investigations reveal that mercury biotransformation is a fast process controlled by diffusion. The most promising way of mercury removal from waste-water is employment of fluidized bed of immobilized bacteria, because of continuous mercury volatilization and possible recovery of this metal.
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