A NEW APPROACH FOR THE MEASUREMENT OF DECAY, ACTIVE FRACTION OF BIOMASS AND EXTRACELLULAR POLYMERIC SUBSTANCES IN HYDROGEN-DRIVEN DENITRIFICATION

Authors: Rezania, B.; Oleszkiewicz, J. A.; Cicek, N.

Source: Proceedings of the Water Environment Federation, WEFTEC 2005: Session 21 through Session 30 , pp. 2074-2084(11)

Publisher: Water Environment Federation

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Abstract:

A new method for measuring the active fraction of biomass, decay coefficient and concentration of extracellular polymeric substances (EPS) was developed for a steady-state culture. The method was used to determine microbial characteristics, decay and yield coefficients in a hydrogen-dependent autotrophic (hydrogenotrophic) denitrification system. It was found that steady-state biomass, operated at 20 day solids retention time, was composed of 41% active biomass, 25.6% cell debris and 33.4% extracellular polymeric substance. Results of 0.041 d⁻¹, and 0.27 mg active biomass per NO3-N were obtained for the decay coefficient and true yield, respectively.

Document Type: Research article

DOI: http://dx.doi.org/10.2175/193864705783867215

Publication date: 2005-01-01

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Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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