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Comparison between the heterotrophic cultivation of Paracoccus denitrificans in continuous stirred tank reactor and horizontal rotating tubular bioreactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
36054 45119 2006 5 PDF Available
Title
Comparison between the heterotrophic cultivation of Paracoccus denitrificans in continuous stirred tank reactor and horizontal rotating tubular bioreactor
Abstract

Bacterium Paracoccus denitrificans is capable to obtain metabolic energy by oxidation of ammonia (chemolitotrophic metabolism) and organic compounds (chemoorganotrophic or heterotrophic metabolism). It can also perform nitrate and nitrite respiration. When cultivated in certain conditions P. denitrificans can conduct the complete transformation of ammonia into gaseous nitrogen and consequently the whole nitrogen removal process can be carried out in one step. These characteristics make it suitable for successful treatment of wastewater with high nitrogen content. In this work the heterotrophic cultivation of P. denitrificans was studied in continuous stirred tank reactor (CSTR) and in horizontal rotating tubular bioreactor (HRTB). Bioprocess dynamics, efficiency and stability in both bioreactors were examined at different dilution rates (D = 0.0333–0.1667 h−1). In both cases, bioprocess dynamics was monitored by the analysis of biomass, substrate and metabolites concentrations in the liqiud outflow. The bioprocess efficiency and stability was much higher in HRTB than in CSTR. Advantages of HRTB over CSTR were more obvious at higher dilution rates as a consequence of bacterial biofilm formation on the inner surface of HRTB that enabled better biomass retention.

Keywords
Paracoccus denitrificans; Heterotrophic cultivation; Continuous stirred tank reactor; Horizontal rotating tubular bioreactor; Dilution rate; Biofilm
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Comparison between the heterotrophic cultivation of Paracoccus denitrificans in continuous stirred tank reactor and horizontal rotating tubular bioreactor
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 41, Issue 9, September 2006, Pages 2024–2028
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us